refactor(smolmachines): drop obsolete docker-sidecar helpers

CI runs as root, so chmod 0o000 doesn't prevent reads. Both
test_skips_unreadable_file (TestFindRepoBottleFile) and
test_returns_false_when_file_unreadable_on_write now mock
Path.read_text to raise OSError directly.

Dockerfile.sidecars

@@ -18,7 +18,7 @@
 #   /git-gate-entrypoint.sh              docker-cp'd at start time
 #   /git-gate/creds/*                    docker-cp'd at start time
 #   /git/*                               bare repos, populated at runtime
-#   /run/supervise/queue/                bind-mounted at run time
+#   /run/supervise/bot-bottle.db         bind-mounted at run time
 #   /home/mitmproxy/.mitmproxy/          mitmproxy CA dir
 #
 # Exposed ports inside the container:
@@ -66,6 +66,12 @@ COPY bot_bottle/egress_dlp_config.py /app/egress_dlp_config.py
 COPY bot_bottle/egress_addon.py      /app/egress_addon.py
 COPY bot_bottle/dlp_detectors.py     /app/dlp_detectors.py
 COPY bot_bottle/yaml_subset.py       /app/yaml_subset.py
+COPY bot_bottle/migrations.py        /app/migrations.py
+COPY bot_bottle/db_store.py          /app/db_store.py
+COPY bot_bottle/supervise_types.py   /app/supervise_types.py
+COPY bot_bottle/queue_store.py       /app/queue_store.py
+COPY bot_bottle/audit_store.py       /app/audit_store.py
+COPY bot_bottle/store_manager.py     /app/store_manager.py
 COPY bot_bottle/supervise.py         /app/supervise.py
 COPY bot_bottle/supervise_server.py  /app/supervise_server.py
 COPY bot_bottle/sidecar_init.py      /app/sidecar_init.py
@@ -81,7 +87,7 @@ RUN mkdir -p \
       /etc/git-gate \
       /git-gate/creds \
       /git \
-      /run/supervise/queue \
+      /run/supervise \
       /home/mitmproxy/.mitmproxy
 
 # Documentation only — the compose renderer publishes whichever

README.md

@@ -6,7 +6,7 @@
 
 [![test](https://gitea.dideric.is/didericis/bot-bottle/actions/workflows/test.yml/badge.svg?branch=main)](https://gitea.dideric.is/didericis/bot-bottle/actions?workflow=test.yml)
 [![coverage](https://img.shields.io/badge/coverage-84%25-brightgreen)](https://coverage.readthedocs.io/)
-[![core coverage](https://img.shields.io/badge/core%20coverage-96%25-brightgreen)](https://gitea.dideric.is/didericis/bot-bottle/src/branch/main/docs/decisions/0004-coverage-policy.md)
+[![core coverage](https://img.shields.io/badge/core%20coverage-95%25-brightgreen)](https://gitea.dideric.is/didericis/bot-bottle/src/branch/main/docs/decisions/0004-coverage-policy.md)
 
 **Problem:** Developer wants to run a coding agent without supervision, but they don't want a prompt injected or misbehaving agent wrecking their environment or exfiltrating sensitive data.
 
@@ -25,7 +25,7 @@
 - **Provider templates (Claude, Codex)** — `Dockerfile.claude` / `Dockerfile.codex`, or a bottle-supplied Dockerfile. Claude auth via long-lived OAuth token; Codex via opt-in host device-auth forwarding.
 - **gVisor auto-detect** — on Linux hosts where `runsc` is registered with Docker, every bottle launches under it for a userspace syscall barrier; no manifest config required.
 - **Apple Container backend (macOS default when available)** — runs the agent and sidecar bundle with Apple's `container` CLI, using a host-only agent network plus a separate sidecar egress network.
-- **Smolmachines backend** — runs the agent in a libkrun micro-VM while the sidecar bundle stays in Docker. TSI and smolmachines DNS filtering close the raw DNS exfiltration gap that exists in the legacy Docker backend.
+- **Smolmachines backend** — runs the agent in a libkrun micro-VM while the sidecar bundle stays in Docker. TSI and smolmachines DNS filtering close the raw DNS exfiltration gap that exists in the legacy Docker backend. Runs on macOS (Hypervisor.framework) and Linux (KVM, `/dev/kvm`).
 - **Legacy Docker backend** — still available for examples, CI, and hosts without Apple Container via `BOT_BOTTLE_BACKEND=docker` or `--backend=docker`.
 
 ## Architecture
@@ -71,10 +71,26 @@ When the agent exits, `cli.py` tears down every sidecar and both networks; nothi
 
 ## Quickstart
 
-On compatible macOS hosts, the default backend requires Apple's `container` CLI and does not require Docker. The smolmachines backend requires Docker on the host for the sidecar bundle plus smolvm. The legacy Docker backend requires Docker. Claude bottles also need a long-lived Claude Code OAuth token (`claude setup-token`) exported as `BOT_BOTTLE_CLAUDE_OAUTH_TOKEN`.
+On compatible macOS hosts, the default backend requires Apple's `container` CLI and does not require Docker. The smolmachines backend requires Docker on the host for the sidecar bundle plus `smolvm` (macOS or Linux). The legacy Docker backend requires Docker. Claude bottles also need a long-lived Claude Code OAuth token (`claude setup-token`) exported as `BOT_BOTTLE_CLAUDE_OAUTH_TOKEN`.
 
 Use `BOT_BOTTLE_BACKEND=docker ./cli.py start <agent>` on hosts where Apple Container is not installed and Docker is the desired backend.
 
+### smolmachines on Linux
+
+The smolmachines backend runs on Linux as well as macOS. On Linux, `smolvm`/libkrun use KVM, so the host needs:
+
+- **`/dev/kvm`** present and accessible. Load `kvm-intel` or `kvm-amd` (and enable virtualization in BIOS/firmware). The invoking user must be in the `kvm` group: `sudo usermod -aG kvm "$USER"` then re-login. bot-bottle preflights this and reports exactly what's missing.
+- **`smolvm`** on `PATH`: `curl -sSL https://smolmachines.com/install.sh | sh`.
+- **Docker** for the sidecar bundle and image build, same as macOS.
+
+Per-bottle isolation works the same as macOS without any `ifconfig`/sudo step — all of `127.0.0.0/8` is already loopback on Linux, so each bottle's sidecar bundle is published on its own `127.0.0.<N>` and TSI's allowlist is scoped to that `/32`.
+
+```sh
+BOT_BOTTLE_BACKEND=smolmachines ./cli.py start <agent>
+```
+
+> **NixOS:** enable `virtualisation.docker`, ensure the KVM module is loaded (`boot.kernelModules = [ "kvm-intel" ];` or `kvm-amd`), and add your user to the `kvm` and `docker` groups. If you run bottles from a Gitea Actions runner, use a `host`-label runner so Docker, `smolvm`, and `/dev/kvm` are all reachable from the job. `smolvm` isn't in nixpkgs — install the release binary (pin the version) and put it on the runner's `PATH`.
+
 ```sh
 ./cli.py start <agent>   # builds the image on first run, drops you into claude
 ```

bot_bottle/agent_provider.py

@@ -227,6 +227,10 @@ class AgentProvider(ABC):
         from .backend.util import AGENT_CA_PATH, log_ca_fingerprint, select_ca_cert
         from .log import die
         cert_host_path, label = select_ca_cert(plan.egress_plan)
+        # Ensure the target directory exists. smolvm's pack step may not
+        # preserve the empty /usr/local/share/ca-certificates/ directory
+        # on Linux; mkdir -p is idempotent and safe for all backends.
+        bottle.exec("mkdir -p /usr/local/share/ca-certificates", user="root")
         bottle.cp_in(str(cert_host_path), AGENT_CA_PATH)
         r = bottle.exec(
             f"chmod 644 {AGENT_CA_PATH} && update-ca-certificates",

bot_bottle/audit_store.py

@@ -0,0 +1,91 @@
+"""SQLite-backed audit store for supervise (PRD 0013)."""
+
+from __future__ import annotations
+
+import sqlite3
+from pathlib import Path
+
+try:
+    from .supervise_types import AuditEntry, host_db_path
+    from .db_store import DbStore
+    from .migrations import TableMigrations
+except ImportError:
+    from supervise_types import AuditEntry, host_db_path  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+    from db_store import DbStore  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+    from migrations import TableMigrations  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+
+
+class AuditStore(DbStore):
+    """SQLite-backed persistent store for supervise audit entries."""
+
+    def __init__(self, db_path: Path | None = None) -> None:
+        # One entry per schema version: migrations[0] brings a fresh DB to
+        # version 1, [1] to version 2, etc.  Add new entries at the end; never
+        # edit existing ones.
+        migrations = TableMigrations("audit_store", [
+            # v1 — initial schema
+            """
+            CREATE TABLE IF NOT EXISTS supervise_audit_entries (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                timestamp TEXT NOT NULL,
+                bottle_slug TEXT NOT NULL,
+                component TEXT NOT NULL,
+                operator_action TEXT NOT NULL,
+                operator_notes TEXT NOT NULL,
+                justification TEXT NOT NULL,
+                diff TEXT NOT NULL
+            )
+            """,
+        ])
+        super().__init__(db_path or host_db_path(), migrations)
+
+    def write_audit_entry(self, entry: AuditEntry) -> Path:
+        with self._connect() as conn:
+            conn.execute(
+                """
+                INSERT INTO supervise_audit_entries (
+                    timestamp, bottle_slug, component, operator_action,
+                    operator_notes, justification, diff
+                ) VALUES (?, ?, ?, ?, ?, ?, ?)
+                """,
+                (
+                    entry.timestamp,
+                    entry.bottle_slug,
+                    entry.component,
+                    entry.operator_action,
+                    entry.operator_notes,
+                    entry.justification,
+                    entry.diff,
+                ),
+            )
+        self._chmod()
+        return self.db_path
+
+    def read_audit_entries(self, component: str, slug: str) -> list[AuditEntry]:
+        if not self.db_path.is_file():
+            return []
+        with self._connect() as conn:
+            rows = conn.execute(
+                """
+                SELECT * FROM supervise_audit_entries
+                WHERE component = ? AND bottle_slug = ?
+                ORDER BY id
+                """,
+                (component, slug),
+            ).fetchall()
+        return [self._row_to_entry(row) for row in rows]
+
+    @staticmethod
+    def _row_to_entry(row: sqlite3.Row) -> AuditEntry:
+        return AuditEntry(
+            timestamp=row["timestamp"],
+            bottle_slug=row["bottle_slug"],
+            component=row["component"],
+            operator_action=row["operator_action"],
+            operator_notes=row["operator_notes"],
+            justification=row["justification"],
+            diff=row["diff"],
+        )
+
+
+__all__ = ["AuditStore"]

bot_bottle/backend/__init__.py

@@ -75,6 +75,9 @@ class BottleSpec:
     # Ordered bottle names selected at launch (issue #269). When non-empty
     # they are merged in order and replace the agent's `bottle:` field.
     bottle_names: tuple[str, ...] = ()
+    # True when launched via --headless (no TTY, no interactive prompts).
+    # The git-gate host-key preflight uses this to error rather than prompt.
+    headless: bool = False
 
 
 @dataclass(frozen=True)
@@ -300,6 +303,13 @@ class BottleBackend(ABC, Generic[PlanT, CleanupT]):
 
         self._preflight()
 
+        from ..git_gate_host_key import preflight_host_keys
+        manifest = preflight_host_keys(
+            manifest,
+            headless=spec.headless,
+            home_md=spec.manifest.home_md,
+        )
+
         manifest_bottle = manifest.bottle
         manifest_agent_provider = manifest_bottle.agent_provider
         agent_provider = get_provider(manifest_agent_provider.template)

bot_bottle/backend/docker/compose.py

@@ -34,7 +34,7 @@ from ...egress import (
 from ...git_gate import GIT_GATE_HOSTNAME
 from ...log import die, warn
 from ...supervise import (
-    QUEUE_DIR_IN_CONTAINER,
+    DB_PATH_IN_CONTAINER,
     SUPERVISE_HOSTNAME,
     SUPERVISE_PORT,
 )
@@ -163,16 +163,15 @@ def _sidecar_bundle_service(plan: DockerBottlePlan) -> dict[str, Any]:
     if sp is not None:
         env += [
             f"SUPERVISE_BOTTLE_SLUG={plan.slug}",
-            f"SUPERVISE_QUEUE_DIR={QUEUE_DIR_IN_CONTAINER}",
+            f"SUPERVISE_DB_PATH={DB_PATH_IN_CONTAINER}",
             f"SUPERVISE_PORT={SUPERVISE_PORT}",
         ]
         volumes.append({
             "type": "bind",
-            "source": str(sp.queue_dir),
+            "source": str(sp.db_path),
-            "target": QUEUE_DIR_IN_CONTAINER,
+            "target": DB_PATH_IN_CONTAINER,
             "read_only": False,
         })
-
     internal_aliases = [EGRESS_HOSTNAME]
     if gp.upstreams:
         internal_aliases.append(GIT_GATE_HOSTNAME)

bot_bottle/backend/docker/launch.py

@@ -37,7 +37,10 @@ from pathlib import Path
 from typing import Callable, Generator
 
 from ...egress import egress_resolve_token_values
-from ...git_gate import revoke_git_gate_provisioned_keys
+from ...git_gate import (
+    provision_git_gate_dynamic_keys,
+    revoke_git_gate_provisioned_keys,
+)
 from ...log import info, warn
 from . import network as network_mod
 from . import util as docker_mod
@@ -118,6 +121,11 @@ def launch(
 
         git_gate_plan = plan.git_gate_plan
         if git_gate_plan.upstreams:
+            git_gate_plan = provision_git_gate_dynamic_keys(
+                plan.manifest.bottle,
+                git_gate_plan,
+                git_gate_state_dir(plan.slug),
+            )
             git_gate_plan = dataclasses.replace(
                 git_gate_plan,
                 internal_network=internal_network,

bot_bottle/backend/macos_container/launch.py

@@ -28,9 +28,12 @@ from ...egress import (
     egress_resolve_token_values,
     egress_sidecar_env_entries,
 )
-from ...git_gate import revoke_git_gate_provisioned_keys
+from ...git_gate import (
+    provision_git_gate_dynamic_keys,
+    revoke_git_gate_provisioned_keys,
+)
 from ...log import die, info, warn
-from ...supervise import QUEUE_DIR_IN_CONTAINER, SUPERVISE_PORT
+from ...supervise import DB_PATH_IN_CONTAINER, SUPERVISE_PORT
 from ...util import expand_tilde
 from ..docker.egress import EGRESS_CA_IN_CONTAINER, EGRESS_PORT
 from ..docker.git_gate import (
@@ -98,6 +101,8 @@ def launch(
         egress_network = egress_network_name(plan.slug)
         _create_networks(internal_network, egress_network, stack)
 
+        plan = _provision_git_gate_keys(plan)
+
         sidecar_name = sidecar_container_name(plan.slug)
         container_mod.force_remove_container(sidecar_name)
         _start_sidecar_bundle(plan, sidecar_name, internal_network, egress_network)
@@ -241,6 +246,19 @@ def _stamp_agent_urls(
     )
 
 
+def _provision_git_gate_keys(
+    plan: MacosContainerBottlePlan,
+) -> MacosContainerBottlePlan:
+    if not plan.git_gate_plan.upstreams:
+        return plan
+    git_gate_plan = provision_git_gate_dynamic_keys(
+        plan.manifest.bottle,
+        plan.git_gate_plan,
+        git_gate_state_dir(plan.slug),
+    )
+    return dataclasses.replace(plan, git_gate_plan=git_gate_plan)
+
+
 def _stage_git_gate(plan: MacosContainerBottlePlan, sidecar_name: str) -> None:
     gp = plan.git_gate_plan
     if not gp.upstreams:
@@ -361,7 +379,7 @@ def _sidecar_env_entries(plan: MacosContainerBottlePlan) -> tuple[str, ...]:
     if plan.supervise_plan is not None:
         env += [
             f"SUPERVISE_BOTTLE_SLUG={plan.slug}",
-            f"SUPERVISE_QUEUE_DIR={QUEUE_DIR_IN_CONTAINER}",
+            f"SUPERVISE_DB_PATH={DB_PATH_IN_CONTAINER}",
             f"SUPERVISE_PORT={SUPERVISE_PORT}",
         ]
     return tuple(env)
@@ -387,7 +405,15 @@ def _sidecar_mounts(
 
     sp = plan.supervise_plan
     if sp is not None:
-        mounts.append((str(sp.queue_dir), QUEUE_DIR_IN_CONTAINER, False))
+        # `container run --mount type=bind` only accepts directory
+        # sources (a file source fails with "is not a directory") —
+        # mount db_path's dedicated parent dir instead of the file
+        # itself, same as the CA/routes mounts above.
+        mounts.append((
+            str(sp.db_path.parent),
+            str(Path(DB_PATH_IN_CONTAINER).parent),
+            False,
+        ))
 
     return tuple(mounts)
 

bot_bottle/backend/smolmachines/bottle.py

@@ -47,10 +47,24 @@ _HOME_FOR = {
     "root": "/root",
 }
 
+_DEFAULT_PATH_FOR = {
+    # Committed smolmachine snapshots are rebuilt from a rootfs tarball and
+    # lose Docker image ENV metadata. Restore the provider CLI path here so
+    # resumed Codex bottles can still find the per-user install.
+    "node": (
+        "/home/node/.local/bin:"
+        "/home/node/.codex/packages/standalone/current/bin:"
+        "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+    ),
+    "root": "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+}
+
 
 def _env_assignments_for(user: str, env: Mapping[str, str]) -> list[str]:
     home = _HOME_FOR.get(user, f"/home/{user}")
     out = [f"HOME={home}", f"USER={user}"]
+    if "PATH" not in env:
+        out.append(f"PATH={_DEFAULT_PATH_FOR.get(user, _DEFAULT_PATH_FOR['root'])}")
     for k, v in env.items():
         out.append(f"{k}={v}")
     return out

bot_bottle/backend/smolmachines/bottle_plan.py

@@ -1,10 +1,8 @@
 """SmolmachinesBottlePlan — concrete BottlePlan for the smolmachines
 backend (PRD 0023).
 
-Slug + bundle docker subnet / gateway / pinned IP + smolvm
+Slug + legacy bundle network coordinates + smolvm machine name +
-machine name + agent `.smolmachine` artifact + per-bottle guest
+agent `.smolmachine` artifact + per-bottle guest env."""
-env. Provisioning fields (CA cert path, prompt path, etc.) land
-in chunk 4."""
 
 from __future__ import annotations
 
@@ -23,9 +21,10 @@ class SmolmachinesBottlePlan(BottlePlan):
     `supervise_plan`, and `agent_provision` from BottlePlan."""
 
     slug: str
-    # Per-bottle docker subnet for the sidecar bundle container.
+    # Legacy per-bottle bundle network coordinates. These remain on
-    # The bundle runs at `bundle_ip` (always `.2`); the gateway is
+    # the plan while BundleLaunchSpec still carries the original shape,
-    # at `.1`. smolvm's TSI allowlist is set to `bundle_ip/32`.
+    # but the smolmachines launch path exposes the sidecar VM through
+    # host-loopback forwarders instead of a Docker bridge IP.
     bundle_subnet: str
     bundle_gateway: str
     bundle_ip: str
@@ -36,22 +35,10 @@ class SmolmachinesBottlePlan(BottlePlan):
     # `--smolfile` is mutually exclusive with `--from`, and
     # `--from` is the path that avoids the registry-pull race).
     guest_env: dict[str, str]
-    # Inner Plans for the sidecar bundle daemons. The same shape the
+    # Agent-side endpoints. Empty at prepare time; launch populates
-    # docker backend uses — same `.prepare()` calls produced
+    # these after sidecar VM bringup via `dataclasses.replace`.
-    # them — but our launch step doesn't populate the
+    # Format: a `host:port` for git-gate (insteadOf URL prefix) +
-    # docker-specific network fields (internal_network,
+    # full URLs for proxy / supervise.
-    # egress_network) because the smolmachines bundle isn't on
-    # docker's `--internal` + egress bridge topology; it's on a
-    # per-bottle bridge with a pinned IP. The unused fields stay
-    # at their dataclass defaults.
-    # Agent-side endpoints. On Docker Desktop the docker bridge
-    # IPs aren't reachable from the smolvm guest (TSI uses macOS
-    # networking; docker container IPs live in the daemon's VM),
-    # so the agent dials the bundle via host loopback +
-    # docker-published random ports. Empty at prepare time;
-    # launch populates these after bundle bringup via
-    # `dataclasses.replace`. Format: a `host:port` for git-gate
-    # (insteadOf URL prefix) + full URLs for proxy / supervise.
     agent_proxy_url: str = ""
     agent_git_gate_host: str = ""
     agent_supervise_url: str = ""

bot_bottle/backend/smolmachines/egress_apply.py

@@ -1,20 +1,51 @@
 """Egress apply for the smolmachines backend.
 
-The smolmachines sidecar bundle runs as a host-side Docker container,
+The smolmachines sidecar bundle runs as a sidecar smolVM. Route-file
-so egress signalling is identical to the docker backend.
+inspection and reload signalling therefore go through ``smolvm machine
+exec`` instead of Docker.
 """
 
 from __future__ import annotations
 
-from ..docker.egress_apply import (  # noqa: F401
+from ...egress import EGRESS_ROUTES_IN_CONTAINER
-    DockerEgressApplicator,
+from ...log import warn
-    EgressApplyError,
+from ..egress_apply import EgressApplicator, EgressApplyError
-    applicator,
+from . import sidecar_bundle as _bundle
-    fetch_current_routes,
+from . import smolvm as _smolvm
-)
+
+
+def fetch_current_routes(slug: str) -> str:
+    machine = _bundle.bundle_machine_name(slug)
+    result = _smolvm.machine_exec(machine, ["cat", EGRESS_ROUTES_IN_CONTAINER])
+    if result.returncode != 0:
+        raise EgressApplyError(
+            f"could not read routes.yaml from {machine}: "
+            f"{(result.stderr or '').strip() or 'sidecar VM not running?'}"
+        )
+    return result.stdout
+
+
+class SmolmachinesEgressApplicator(EgressApplicator):
+    def _signal_bundle_reload(self, slug: str) -> None:
+        machine = _bundle.bundle_machine_name(slug)
+        result = _smolvm.machine_exec(machine, ["sh", "-c", "kill -HUP 1"])
+        if result.returncode != 0:
+            last_error = (result.stderr or "").strip() or (result.stdout or "").strip()
+            warn(
+                f"egress: routes updated on disk for {slug}, but bundle reload failed: "
+                f"{last_error or 'smolvm exec failed'}"
+            )
+            raise EgressApplyError(
+                f"could not reload egress bundle {machine}: "
+                f"{last_error or 'smolvm exec failed'}"
+            )
+
+
+applicator = SmolmachinesEgressApplicator()
+
 
 __all__ = [
-    "DockerEgressApplicator",
+    "SmolmachinesEgressApplicator",
     "EgressApplyError",
     "applicator",
     "fetch_current_routes",

bot_bottle/backend/smolmachines/enumerate.py

@@ -31,6 +31,7 @@ from . import sidecar_bundle as _bundle
 # matching the bundle container name pattern. We use the prefix
 # both as a filter and to strip back to the slug.
 _VM_NAME_PREFIX = "bot-bottle-"
+_SIDECAR_VM_PREFIX = _bundle.bundle_machine_name("")
 
 
 def enumerate_active() -> list[ActiveAgent]:
@@ -54,7 +55,11 @@ def enumerate_active() -> list[ActiveAgent]:
     for m in machines:
         name = m.get("name") or ""
         state = m.get("state") or ""
-        if state != "running" or not name.startswith(_VM_NAME_PREFIX):
+        if (
+            state != "running"
+            or not name.startswith(_VM_NAME_PREFIX)
+            or name.startswith(_SIDECAR_VM_PREFIX)
+        ):
             continue
         slug = name[len(_VM_NAME_PREFIX):]
         metadata = read_metadata(slug)

bot_bottle/backend/smolmachines/launch.py

@@ -1,12 +1,9 @@
-"""End-to-end launch flow for the smolmachines backend
+"""End-to-end launch flow for the smolmachines backend.
-(PRD 0023 chunks 2d + 4b).
 
-Brings up the per-bottle docker bridge + sidecar bundle (with
+Builds the sidecar bundle smolmachine, starts it as a sidecar VM
-real daemons + their config files), creates + starts the smolvm
+with real daemons + their config files, creates + starts the agent
-guest pointed at the bundle's pinned IP via TSI's
+smolVM, yields a `SmolmachinesBottle` handle, and tears everything
-`--allow-cidr <bundle-ip>/32` allowlist, yields a
+down on context exit.
-`SmolmachinesBottle` handle, tears everything down on context
-exit.
 
 The bundle's daemons consume the inner Plans the docker backend
 already produces: egress reads routes + CAs from the EgressPlan.
@@ -27,7 +24,7 @@ from ...egress import (
     egress_resolve_token_values,
     egress_sidecar_env_entries,
 )
-from ...supervise import QUEUE_DIR_IN_CONTAINER, SUPERVISE_PORT
+from ...supervise import DB_PATH_IN_CONTAINER, SUPERVISE_PORT
 from ...util import expand_tilde
 from ..docker import util as docker_mod
 from ..docker.egress import (
@@ -41,7 +38,10 @@ from ..docker.git_gate import (
     GIT_GATE_ENTRYPOINT_IN_CONTAINER,
     GIT_GATE_HOOK_IN_CONTAINER,
 )
-from ...git_gate import revoke_git_gate_provisioned_keys
+from ...git_gate import (
+    provision_git_gate_dynamic_keys,
+    revoke_git_gate_provisioned_keys,
+)
 from ...log import info, warn
 from ...bottle_state import (
     egress_state_dir,
@@ -49,6 +49,7 @@ from ...bottle_state import (
     read_committed_image,
 )
 from . import loopback_alias as _loopback
+from . import port_forward as _forward
 from . import sidecar_bundle as _bundle
 from . import smolvm as _smolvm
 from .bottle import SmolmachinesBottle
@@ -68,9 +69,8 @@ _SMOLMACHINE_CACHE_DIR = Path.home() / ".cache" / "bot-bottle" / "smolmachines"
 
 
 # Container-internal listening ports for each bundle daemon. The
-# bundle publishes each one on a random host loopback port (see
+# sidecar VM publishes each one on a random host loopback port, and
-# `_bundle.start_bundle`), and `_bundle.bundle_host_port` looks
+# the launch flow wraps those raw ports with per-bottle forwarders.
-# them up post-start.
 _GIT_HTTP_PORT = 9420
 _SUPERVISE_PORT = SUPERVISE_PORT
 
@@ -88,12 +88,12 @@ def launch(
     try:
         loopback_ip, network = _allocate_resources(plan, stack)
         plan = _mint_certs(plan)
-        plan = _start_bundle(plan, network, loopback_ip, stack)
+        proxy_host = loopback_ip
-        plan = _discover_urls(plan, loopback_ip)
+        plan = _start_bundle(plan, network, proxy_host, stack)
 
         agent_from_path = _agent_from_path(plan)
 
-        _launch_vm(plan, agent_from_path, loopback_ip, stack)
+        _launch_vm(plan, agent_from_path, proxy_host, stack)
         _init_vm(plan)
 
         bottle = SmolmachinesBottle(
@@ -139,17 +139,17 @@ def _allocate_resources(
     plan: SmolmachinesBottlePlan,
     stack: ExitStack,
 ) -> tuple[str, str]:
-    """Reserve a loopback alias and create the per-bottle docker bridge.
+    """Reserve a per-bottle host address.
 
-    macOS only routes 127.0.0.1 by default; the per-bottle alias
+    The per-bottle address scopes TSI's allowlist to this bottle's
-    scopes TSI's allowlist to this bottle's published ports so the
+    forwarder-published ports so the agent can't reach other bottles'
-    agent can't reach other bottles' or host services' ports on
+    or host services. The returned network name remains in the bundle
-    loopback. No-op on Linux."""
+    spec for compatibility with older helper tests; no Docker sidecar
+    container is launched."""
+    del stack
     _loopback.ensure_pool()
     loopback_ip = _loopback.allocate(plan.slug)
     network = _bundle.bundle_network_name(plan.slug)
-    _bundle.create_bundle_network(network, plan.bundle_subnet, plan.bundle_gateway)
-    stack.callback(_bundle.remove_bundle_network, network)
     return loopback_ip, network
 
 
@@ -169,54 +169,86 @@ def _mint_certs(plan: SmolmachinesBottlePlan) -> SmolmachinesBottlePlan:
 def _start_bundle(
     plan: SmolmachinesBottlePlan,
     network: str,
-    loopback_ip: str,
+    proxy_host: str,
     stack: ExitStack,
 ) -> SmolmachinesBottlePlan:
-    """Build the BundleLaunchSpec, resolve token env, start the
+    """Build the BundleLaunchSpec, start the sidecar VM, wrap its raw
-    sidecar bundle container, and register teardown."""
+    smolVM-published loopback ports with per-bottle forwarders, stamp
-    bundle_spec = _bundle_launch_spec(plan, network, loopback_ip)
+    agent URLs from those forwarder ports, and register teardown."""
+    plan = _provision_git_gate_keys(plan)
+    bundle_spec = _bundle_launch_spec(plan, network, proxy_host)
     token_env = _resolve_token_env(plan, dict(os.environ))
-    _bundle.ensure_bundle_image(bundle_spec.image)
+    artifact = _ensure_smolmachine(
-    _bundle.start_bundle(bundle_spec, env={**os.environ, **token_env})
+        bundle_spec.image,
-    stack.callback(_bundle.stop_bundle, plan.slug)
+        dockerfile=_bundle.SIDECAR_BUNDLE_DOCKERFILE,
-    return plan
+    )
+    launch = _bundle.start_bundle_vm(
+        bundle_spec,
+        from_path=artifact,
+        host_env={**os.environ, **token_env},
+    )
+    stack.callback(_bundle.stop_bundle_vm, plan.slug)
+
+    forward_specs = tuple(
+        _forward.ForwardSpec(
+            label=_label_for_port(container_port),
+            listen_host=proxy_host,
+            listen_port=0,
+            target_host="127.0.0.1",
+            target_port=host_port,
+        )
+        for container_port, host_port in launch.raw_ports.items()
+    )
+    handle = _forward.start_forwarder(forward_specs)
+    stack.callback(_forward.stop_forwarder, handle)
+    published_ports = {
+        _port_for_label(spec.label): spec.listen_port
+        for spec in handle.forwards
+    }
+    return _discover_urls(plan, proxy_host, published_ports)
+
+
+def _provision_git_gate_keys(
+    plan: SmolmachinesBottlePlan,
+) -> SmolmachinesBottlePlan:
+    if not plan.git_gate_plan.upstreams:
+        return plan
+    git_gate_plan = provision_git_gate_dynamic_keys(
+        plan.manifest.bottle,
+        plan.git_gate_plan,
+        git_gate_state_dir(plan.slug),
+    )
+    return dataclasses.replace(plan, git_gate_plan=git_gate_plan)
 
 
 def _discover_urls(
     plan: SmolmachinesBottlePlan,
-    loopback_ip: str,
+    proxy_host: str,
+    published_ports: dict[int, int],
 ) -> SmolmachinesBottlePlan:
-    """Discover host-side ports for published container ports and
+    """Stamp URLs + guest_env from per-bottle forwarder ports.
-    return the plan with URLs + guest_env stamped in.
 
-    Docker container IPs (192.168.x.x in the daemon's bridge)
+    `proxy_host` is the host IP that both TSI's allowlist and the
-    aren't reachable from the smolvm guest on macOS — TSI uses
+    forwarder listeners are keyed to. The raw smolVM-published ports
-    macOS networking, and macOS sees the daemon's bridge via the
+    are intentionally not advertised to the agent.
-    published-port loopback forward only.
 
-    NO_PROXY includes the per-bottle loopback alias so the
+    NO_PROXY includes `proxy_host` so supervise + git-gate URLs
-    supervise + git-gate URLs bypass HTTPS_PROXY."""
+    bypass HTTPS_PROXY."""
-    agent_facing_host_port = _bundle.bundle_host_port(
+    agent_facing_host_port = published_ports[_EGRESS_PORT]
-        plan.slug, _EGRESS_PORT, host_ip=loopback_ip,
+    agent_proxy_url = f"http://{proxy_host}:{agent_facing_host_port}"
-    )
-    agent_proxy_url = f"http://{loopback_ip}:{agent_facing_host_port}"
 
     agent_git_gate_host = ""
     if plan.git_gate_plan.upstreams:
-        git_gate_host_port = _bundle.bundle_host_port(
+        git_gate_host_port = published_ports[_GIT_HTTP_PORT]
-            plan.slug, _GIT_HTTP_PORT, host_ip=loopback_ip,
+        agent_git_gate_host = f"{proxy_host}:{git_gate_host_port}"
-        )
-        agent_git_gate_host = f"{loopback_ip}:{git_gate_host_port}"
 
     agent_supervise_url = ""
     if plan.supervise_plan is not None:
-        supervise_host_port = _bundle.bundle_host_port(
+        supervise_host_port = published_ports[_SUPERVISE_PORT]
-            plan.slug, _SUPERVISE_PORT, host_ip=loopback_ip,
+        agent_supervise_url = f"http://{proxy_host}:{supervise_host_port}/"
-        )
-        agent_supervise_url = f"http://{loopback_ip}:{supervise_host_port}/"
 
     existing_no_proxy = plan.guest_env.get("NO_PROXY", "localhost,127.0.0.1")
-    no_proxy = f"{existing_no_proxy},{loopback_ip}"
+    no_proxy = f"{existing_no_proxy},{proxy_host}"
     guest_env = {
         **plan.guest_env,
         "HTTPS_PROXY": agent_proxy_url,
@@ -246,27 +278,31 @@ def _discover_urls(
 def _launch_vm(
     plan: SmolmachinesBottlePlan,
     agent_from_path: Path,
-    loopback_ip: str,
+    proxy_host: str,
     stack: ExitStack,
 ) -> None:
     """Create, patch, and start the smolvm VM; register teardown.
 
-    --allow-cidr is the per-bottle loopback alias so the guest can
+    --allow-cidr is `proxy_host/32` — the per-bottle loopback alias.
-    only reach this bottle's bundle ports. force_allowlist patches
+    This ensures the guest can only reach sidecar forwarders published
-    smolvm 0.8.0's silent-drop of --allow-cidr when combined with
+    on that IP, not host localhost or another bottle's alias.
-    --from. Smolfile isn't usable here — smolvm 0.8.0 makes --from
+    force_allowlist confirms the allowlist persisted (patching smolvm
-    and --smolfile mutually exclusive."""
+    0.8.0's silent-drop of --allow-cidr when combined with --from) and
+    fails closed if it can't. Smolfile isn't usable here — smolvm 0.8.0
+    makes --from and --smolfile mutually exclusive."""
+    tsi_cidr = f"{proxy_host}/32"
     _smolvm.machine_create(
         plan.machine_name,
         from_path=agent_from_path,
-        allow_cidrs=[f"{loopback_ip}/32"],
+        allow_cidrs=[tsi_cidr],
         env=plan.guest_env,
     )
     stack.callback(_smolvm.machine_delete, plan.machine_name)
-    # Workaround smolvm 0.8.0: `--allow-cidr` is silently dropped
+    # Confirm the booted VM's TSI allowlist will actually enforce the
-    # when combined with `--from`. Patch the persisted state DB
+    # /32 before start (smolvm 0.8.0 silently drops `--allow-cidr`
-    # before start so the booted VM's TSI actually enforces.
+    # with `--from`, so the persisted state DB is patched if needed).
-    _loopback.force_allowlist(plan.machine_name, [f"{loopback_ip}/32"])
+    # Fails closed if enforcement can't be confirmed.
+    _loopback.force_allowlist(plan.machine_name, [tsi_cidr])
     _smolvm.machine_start(plan.machine_name)
     stack.callback(_smolvm.machine_stop, plan.machine_name)
 
@@ -275,7 +311,9 @@ def _init_vm(plan: SmolmachinesBottlePlan) -> None:
     """Repair filesystem ownership and wait for exec channel readiness.
 
     Ownership repair: smolvm's pack process remaps files to the host
-    invoker's uid (501 on macOS). /home/node must be node:node so
+    invoker's uid (e.g. 501 on macOS, 1000 on Linux). The chowns use
+    names not numbers so they're correct on either. /home/node must
+    be node:node so
     Claude Code can write ~/.claude.json; /tmp + /var/tmp need root
     mode 1777 so non-root processes can create per-uid scratch dirs.
     All folded into one sh -c to avoid back-to-back exec calls
@@ -298,8 +336,30 @@ def _init_vm(plan: SmolmachinesBottlePlan) -> None:
     _smolvm.wait_exec_ready(plan.machine_name)
 
 
+def _label_for_port(port: int) -> str:
+    if port == _EGRESS_PORT:
+        return "egress"
+    if port == _GIT_HTTP_PORT:
+        return "git-http"
+    if port == _SUPERVISE_PORT:
+        return "supervise"
+    return f"port-{port}"
+
+
+def _port_for_label(label: str) -> int:
+    if label == "egress":
+        return _EGRESS_PORT
+    if label == "git-http":
+        return _GIT_HTTP_PORT
+    if label == "supervise":
+        return _SUPERVISE_PORT
+    if label.startswith("port-"):
+        return int(label.removeprefix("port-"))
+    raise ValueError(f"unknown sidecar forward label: {label}")
+
+
 def _bundle_launch_spec(
-    plan: SmolmachinesBottlePlan, network: str, loopback_ip: str,
+    plan: SmolmachinesBottlePlan, network: str, proxy_host: str,
 ) -> _bundle.BundleLaunchSpec:
     """Build a BundleLaunchSpec from the resolved inner Plans.
 
@@ -352,14 +412,15 @@ def _bundle_launch_spec(
         daemons.append("supervise")
         env += [
             f"SUPERVISE_BOTTLE_SLUG={plan.slug}",
-            f"SUPERVISE_QUEUE_DIR={QUEUE_DIR_IN_CONTAINER}",
+            f"SUPERVISE_DB_PATH={DB_PATH_IN_CONTAINER}",
             f"SUPERVISE_PORT={SUPERVISE_PORT}",
         ]
-        volumes.append((str(sp.queue_dir), QUEUE_DIR_IN_CONTAINER, False))
+        volumes.append((str(sp.db_path), DB_PATH_IN_CONTAINER, False))
 
     # Container ports the agent reaches from the smolvm guest —
-    # published on host loopback so the guest can dial via TSI +
+    # published on `proxy_host` so the TSI allowlist and the docker
-    # macOS networking. Egress is always the agent's HTTP/HTTPS proxy.
+    # port-forward bindings point at the same IP. Egress is always
+    # the agent's HTTP/HTTPS proxy.
     ports_to_publish: list[int] = [_EGRESS_PORT]
     if gp.upstreams:
         ports_to_publish.append(_GIT_HTTP_PORT)
@@ -376,7 +437,7 @@ def _bundle_launch_spec(
         environment=tuple(env),
         volumes=tuple(volumes),
         ports_to_publish=tuple(ports_to_publish),
-        publish_host_ip=loopback_ip,
+        publish_host_ip=proxy_host,
     )
 
 
@@ -450,6 +511,12 @@ def _ensure_smolmachine(image_ref: str, *, dockerfile: str = "") -> Path:
         return sidecar
     tarball = _SMOLMACHINE_CACHE_DIR / f"{digest}.image.tar"
     docker_mod.save(image_ref, str(tarball))
+    # On Linux, `docker save -o` writes the tarball with owner-only
+    # permissions (mode 600). The crane push container runs as UID
+    # 65532 (distroless nonroot) and can't read it through a bind
+    # mount unless world-read is set. The tarball is temporary and
+    # lives in ~/.cache, so 644 is safe.
+    tarball.chmod(0o644)
     try:
         with ephemeral_registry() as handle:
             push_ref = f"{handle.push_endpoint}/bot-bottle:{digest}"

bot_bottle/backend/smolmachines/loopback_alias.py

@@ -33,10 +33,13 @@ sudo-add the missing pool on first use per boot — the aliases
 persist on `lo0` until reboot, so subsequent launches don't
 prompt.
 
-Linux native daemons share the host's network namespace; the
+On Linux the whole `127.0.0.0/8` is already routed to `lo`, so
-whole `127.0.0.0/8` is reachable by default and aliases are
+docker can publish a bundle's ports directly on `127.0.0.<N>`
-unnecessary. The pool logic detects native-Linux and skips sudo
+with no `ifconfig`/sudo step. `ensure_pool` is therefore a no-op
-entirely; the DB patch is also gated on macOS.
+on Linux, but per-bottle alias *allocation* and the TSI allowlist
+DB patch run on both platforms — the isolation property is
+identical, it's just cheaper to set up on Linux. The state-DB
+path differs per platform (see `_smolvm_db_path`).
 
 Allocation is coordinated by inspecting running bundle
 containers' published host IPs — each bottle's bundle owns the
@@ -47,6 +50,7 @@ from __future__ import annotations
 
 import fcntl
 import json
+import os
 import platform
 import re
 import sqlite3
@@ -57,20 +61,34 @@ from typing import Iterable
 from ...log import die, info
 
 
-# smolvm's persistent VM state on macOS — a SQLite DB whose `vms`
+def _smolvm_db_path() -> Path:
-# table holds one JSON BLOB per machine. The Linux path is
+    """smolvm's persistent VM state — a SQLite DB whose `vms` table
-# different, but smolmachines is macOS-only in v1 (PRD 0023) so
+    holds one JSON BLOB per machine. macOS stores it under
-# we hard-code this. If the file moves under us we'll see a
+    `Application Support`; Linux follows the XDG base-dir spec
-# clear FileNotFoundError; not worth defensive cross-platform
+    (`$XDG_DATA_HOME`, default `~/.local/share`).
-# detection until the backend actually needs Linux.
+
-_SMOLVM_DB_PATH = (
+    NOTE: the Linux location is inferred from smolvm's documented
-    Path.home()
+    `~/.local/share` install layout and must be confirmed against a
-    / "Library"
+    real Linux smolvm install. If it's wrong, `force_allowlist`'s
-    / "Application Support"
+    fail-closed check turns it into a clear launch-time error rather
-    / "smolvm"
+    than a silent escape."""
-    / "server"
+    if platform.system() == "Darwin":
-    / "smolvm.db"
+        return (
-)
+            Path.home()
+            / "Library"
+            / "Application Support"
+            / "smolvm"
+            / "server"
+            / "smolvm.db"
+        )
+    xdg_data = os.environ.get("XDG_DATA_HOME")
+    base = Path(xdg_data) if xdg_data else Path.home() / ".local" / "share"
+    return base / "smolvm" / "server" / "smolvm.db"
+
+
+# Resolved once at import: the host platform doesn't change within a
+# process. Tests patch this attribute directly.
+_SMOLVM_DB_PATH = _smolvm_db_path()
 
 
 # Sixteen aliases by default. Tunable for hosts that want more
@@ -131,51 +149,74 @@ def ensure_pool() -> None:
 
 
 def force_allowlist(machine_name: str, allowed_cidrs: list[str]) -> None:
-    """Patch smolvm's persistent VM-state DB to set the machine's
+    """Ensure the machine's persisted TSI allowlist equals
-    `allowed_cidrs` to the given list. Workaround for smolvm
+    `allowed_cidrs`, failing **closed** if that can't be confirmed.
-    0.8.0's silent-drop of `--allow-cidr` when used with `--from`.
 
-    Must run AFTER `smolvm machine create` (the row has to
+    Runs on both macOS and Linux. It exists because smolvm 0.8.0
-    exist) and BEFORE `smolvm machine start` (smolvm reads the
+    silently drops `--allow-cidr` when combined with `--from`, so
-    row on start; in-flight VMs don't pick up changes). Once
+    the allowlist has to be written into smolvm's persistent state
-    smolvm honors the CLI flag upstream this whole function is
+    DB before `machine start`. Rather than assume the flag was
-    redundant — flag-respecting create + remove this call from
+    dropped, we read the persisted row and only patch when it
-    launch.
+    doesn't already match — so a newer smolvm that honors the flag
+    is left untouched.
 
-    No-op on non-macOS — the DB path differs and the Linux
+    Must run AFTER `smolvm machine create` (the row has to exist)
-    smolmachines code path isn't exercised in v1."""
+    and BEFORE `smolvm machine start` (smolvm reads the row on
-    if not _is_macos():
+    start; in-flight VMs don't pick up changes).
-        return
+
+    Fail-closed: if the state DB is missing, the row is missing, or
+    the allowlist still doesn't match after patching, we `die()`
+    rather than boot a VM whose egress confinement we can't verify
+    — an unconfirmed allowlist is a sandbox-escape risk (the agent
+    VM could reach all of host loopback)."""
+    want = list(allowed_cidrs)
     if not _SMOLVM_DB_PATH.is_file():
         die(
-            f"smolvm state DB not found at {_SMOLVM_DB_PATH}. "
+            f"smolvm state DB not found at {_SMOLVM_DB_PATH}; cannot "
-            f"smolvm 0.8.0 expected? `smolvm --version` to check."
+            f"confirm the TSI allowlist is enforced. Refusing to launch "
+            f"(fail-closed). Check `smolvm --version` and the DB "
+            f"location for your platform."
         )
     con = sqlite3.connect(str(_SMOLVM_DB_PATH))
     try:
-        cur = con.cursor()
+        cfg = _read_machine_cfg(con, machine_name)
-        row = cur.execute(
+        if cfg.get("allowed_cidrs") != want:
-            "SELECT data FROM vms WHERE name = ?", (machine_name,),
+            cfg["allowed_cidrs"] = want
-        ).fetchone()
+            # Write as BLOB (the column type smolvm uses) — passing a
-        if row is None:
+            # plain str makes sqlite store it as Text and smolvm then
-            die(
+            # fails to read it.
-                f"smolvm DB has no row for machine {machine_name!r} — "
+            con.execute(
-                f"machine_create must run before force_allowlist."
+                "UPDATE vms SET data = ? WHERE name = ?",
+                (sqlite3.Binary(json.dumps(cfg).encode()), machine_name),
+            )
+            con.commit()
+            cfg = _read_machine_cfg(con, machine_name)
+        if cfg.get("allowed_cidrs") != want:
+            die(
+                f"could not enforce TSI allowlist {want!r} for machine "
+                f"{machine_name!r} (persisted value is "
+                f"{cfg.get('allowed_cidrs')!r}). Refusing to launch "
+                f"(fail-closed)."
             )
-        cfg = json.loads(row[0])
-        cfg["allowed_cidrs"] = list(allowed_cidrs)
-        # Write as BLOB (the column type smolvm uses) — passing a
-        # plain str makes sqlite store it as Text and smolvm then
-        # fails to read it.
-        cur.execute(
-            "UPDATE vms SET data = ? WHERE name = ?",
-            (sqlite3.Binary(json.dumps(cfg).encode()), machine_name),
-        )
-        con.commit()
     finally:
         con.close()
 
 
+def _read_machine_cfg(con: sqlite3.Connection, machine_name: str) -> dict[str, object]:
+    """Read + JSON-decode a machine's `data` BLOB from the smolvm
+    state DB. Dies (fail-closed) if the row is missing — the caller
+    can't confirm enforcement without it."""
+    row = con.execute(
+        "SELECT data FROM vms WHERE name = ?", (machine_name,),
+    ).fetchone()
+    if row is None:
+        die(
+            f"smolvm DB has no row for machine {machine_name!r} — "
+            f"machine_create must run before force_allowlist."
+        )
+    return json.loads(row[0])
+
+
 def allocate(_slug: str) -> str:
     """Pick the lowest-numbered alias from the pool not already
     in use by a running smolmachines bundle. Bails when the pool
@@ -184,16 +225,17 @@ def allocate(_slug: str) -> str:
     used (no on-disk reservation, allocation is purely
     docker-state-driven).
 
-    On non-macOS the whole `127.0.0.0/8` is loopback by default;
+    Runs on both platforms: the allocation logic (docker-state
-    `127.0.0.1` is fine to share and we skip the alias dance.
+    inspection + the file lock) is platform-independent. macOS
-    This still returns a deterministic address so launch.py's
+    needs `ensure_pool` to have aliased the addresses on `lo0`
-    callers don't have to branch on platform.
+    first; on Linux all of `127.0.0.0/8` is already loopback, so
+    docker can publish on the chosen `127.0.0.<N>` with no setup.
+    Per-bottle scoping (so the agent can't reach other bottles' or
+    host services' loopback ports) therefore holds on both.
 
     An exclusive file lock serialises concurrent calls so two
     simultaneous launches don't read the same docker state and
     claim the same alias."""
-    if not _is_macos():
-        return "127.0.0.1"
     _ALLOC_LOCK_PATH.parent.mkdir(parents=True, exist_ok=True)
     with open(_ALLOC_LOCK_PATH, "w", encoding="utf-8") as lf:
         fcntl.flock(lf, fcntl.LOCK_EX)

bot_bottle/backend/smolmachines/port_forward.py

@@ -0,0 +1,245 @@
+"""Per-bottle TCP forwarder for smolmachines sidecar VMs.
+
+smolVM currently publishes guest ports on host loopback as
+``HOST:GUEST`` port pairs, without an address-scoped bind. The agent
+VM's TSI allowlist is IP-only, so bot-bottle exposes a second, stricter
+surface: listeners bound only to the bottle's allocated host address,
+forwarding to the raw smolVM-published loopback ports.
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import os
+import selectors
+import signal
+import socket
+import subprocess
+import sys
+import threading
+from dataclasses import asdict, dataclass
+from typing import Any, Iterable, Sequence
+
+from ...log import die, warn
+
+
+_BUFFER_SIZE = 64 * 1024
+_LOOPBACK_TARGETS = {"127.0.0.1", "::1"}
+_FORBIDDEN_LISTEN_HOSTS = {"", "0.0.0.0", "::", "127.0.0.1", "::1"}
+
+
+@dataclass(frozen=True)
+class ForwardSpec:
+    label: str
+    listen_host: str
+    listen_port: int
+    target_host: str
+    target_port: int
+
+
+@dataclass(frozen=True)
+class ForwarderHandle:
+    process: Any
+    forwards: tuple[ForwardSpec, ...]
+
+
+def start_forwarder(specs: Sequence[ForwardSpec]) -> ForwarderHandle:
+    """Start one helper process for a bottle and wait until all
+    listeners are bound. ``listen_port`` may be 0; the returned specs
+    contain the kernel-assigned ports printed by the helper."""
+    if not specs:
+        return ForwarderHandle(process=_CompletedProcess(), forwards=())
+    _validate_specs(specs)
+    argv = [
+        sys.executable,
+        "-c",
+        "from bot_bottle.backend.smolmachines.port_forward import main; "
+        "raise SystemExit(main())",
+        "--spec-json",
+        json.dumps([asdict(s) for s in specs], separators=(",", ":")),
+    ]
+    proc = subprocess.Popen(
+        argv,
+        stdin=subprocess.DEVNULL,
+        stdout=subprocess.PIPE,
+        stderr=None,
+        text=True,
+        env=os.environ,
+    )
+    assert proc.stdout is not None
+    line = proc.stdout.readline()
+    proc.stdout.close()
+    if not line:
+        proc.terminate()
+        proc.wait(timeout=5)
+        die("smolmachines forwarder failed before reporting readiness")
+    try:
+        payload = json.loads(line)
+        bound = tuple(ForwardSpec(**item) for item in payload["forwards"])
+    except (KeyError, TypeError, ValueError, json.JSONDecodeError) as exc:
+        proc.terminate()
+        proc.wait(timeout=5)
+        die(f"smolmachines forwarder returned invalid readiness payload: {exc}")
+    return ForwarderHandle(process=proc, forwards=bound)
+
+
+def stop_forwarder(handle: ForwarderHandle) -> None:
+    proc = handle.process
+    if proc.poll() is not None:
+        return
+    proc.terminate()
+    try:
+        proc.wait(timeout=5)
+    except subprocess.TimeoutExpired:
+        proc.kill()
+        proc.wait(timeout=5)
+
+
+def _validate_specs(specs: Iterable[ForwardSpec]) -> None:
+    for spec in specs:
+        if spec.listen_host in _FORBIDDEN_LISTEN_HOSTS:
+            die(f"refusing unsafe smolmachines forwarder bind: {spec.listen_host!r}")
+        if spec.target_host not in _LOOPBACK_TARGETS:
+            die(f"refusing non-loopback smolmachines forwarder target: {spec.target_host!r}")
+        if not 0 <= spec.listen_port <= 65535:
+            die(f"invalid smolmachines forwarder listen port: {spec.listen_port}")
+        if not 1 <= spec.target_port <= 65535:
+            die(f"invalid smolmachines forwarder target port: {spec.target_port}")
+
+
+class _CompletedProcess:
+    """Popen-like no-op used when a bottle has no forwards."""
+
+    def poll(self) -> int:
+        return 0
+
+    def terminate(self) -> None:
+        return None
+
+    def kill(self) -> None:
+        return None
+
+    def wait(self, timeout: float | None = None) -> int:
+        del timeout
+        return 0
+
+
+class _Forwarder:
+    def __init__(self, specs: Sequence[ForwardSpec]):
+        _validate_specs(specs)
+        self.specs = tuple(specs)
+        self.selector = selectors.DefaultSelector()
+        self.stop_event = threading.Event()
+        self.listeners: list[tuple[socket.socket, ForwardSpec]] = []
+        self.bound: list[ForwardSpec] = []
+
+    def start(self) -> None:
+        for spec in self.specs:
+            listener = socket.create_server(
+                (spec.listen_host, spec.listen_port),
+                reuse_port=False,
+                backlog=64,
+            )
+            listener.setblocking(False)
+            host, port = listener.getsockname()[:2]
+            bound = ForwardSpec(
+                label=spec.label,
+                listen_host=str(host),
+                listen_port=int(port),
+                target_host=spec.target_host,
+                target_port=spec.target_port,
+            )
+            self.listeners.append((listener, bound))
+            self.bound.append(bound)
+            self.selector.register(listener, selectors.EVENT_READ, bound)
+
+    def serve(self) -> None:
+        while not self.stop_event.is_set():
+            try:
+                events = self.selector.select(timeout=0.25)
+            except OSError:
+                return
+            for key, _ in events:
+                listener = key.fileobj
+                if not isinstance(listener, socket.socket):
+                    continue
+                spec = key.data
+                try:
+                    client, _ = listener.accept()
+                except OSError:
+                    continue
+                threading.Thread(
+                    target=self._handle_client,
+                    args=(client, spec),
+                    daemon=True,
+                ).start()
+
+    def stop(self) -> None:
+        self.stop_event.set()
+        for listener, _ in self.listeners:
+            try:
+                self.selector.unregister(listener)
+            except Exception:  # noqa: BLE001 - best effort shutdown
+                pass
+            listener.close()
+        self.selector.close()
+
+    def _handle_client(self, client: socket.socket, spec: ForwardSpec) -> None:
+        with client:
+            try:
+                target = socket.create_connection((spec.target_host, spec.target_port))
+            except OSError as exc:
+                warn(f"smolmachines forwarder {spec.label}: target connect failed: {exc}")
+                return
+            with target:
+                left = threading.Thread(target=_pipe, args=(client, target), daemon=True)
+                right = threading.Thread(target=_pipe, args=(target, client), daemon=True)
+                left.start()
+                right.start()
+                left.join()
+                right.join()
+
+
+def _pipe(src: socket.socket, dst: socket.socket) -> None:
+    while True:
+        try:
+            data = src.recv(_BUFFER_SIZE)
+        except OSError:
+            break
+        if not data:
+            break
+        try:
+            dst.sendall(data)
+        except OSError:
+            break
+    try:
+        dst.shutdown(socket.SHUT_WR)
+    except OSError:
+        pass
+
+
+def main(argv: Sequence[str] | None = None) -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--spec-json", required=True)
+    ns = parser.parse_args(argv)
+    specs = tuple(ForwardSpec(**item) for item in json.loads(ns.spec_json))
+    forwarder = _Forwarder(specs)
+
+    def request_stop(signum: int, _frame: object) -> None:
+        del signum
+        forwarder.stop()
+
+    signal.signal(signal.SIGTERM, request_stop)
+    signal.signal(signal.SIGINT, request_stop)
+    forwarder.start()
+    print(json.dumps({"forwards": [asdict(s) for s in forwarder.bound]}), flush=True)
+    try:
+        forwarder.serve()
+    finally:
+        forwarder.stop()
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

bot_bottle/backend/smolmachines/resolve_plan.py

@@ -56,13 +56,11 @@ def resolve_plan(
     git_gate_plan: GitGatePlan,
     stage_dir: Path,
 ) -> SmolmachinesBottlePlan:
-    """Materialize the smolmachines plan. The bundle's docker
+    """Materialize the smolmachines plan. The agent `.smolmachine`
-    subnet + pinned IP are derived from the slug; the agent's
+    artifact is built (or cache-hit) here so launch's
-    `.smolmachine` artifact is built (or cache-hit) here so
+    `machine create --from` boots without a registry pull. Per-bottle
-    launch's `machine create --from` boots without a registry
+    guest env lands on the plan for launch to pass straight through
-    pull. Per-bottle guest env + the TSI allow_cidrs land on the
+    to `machine create` flags."""
-    plan for launch to pass straight through to
-    `machine create` flags."""
 
     # ==== smolmachines specific setup ====
     subnet, gateway, bundle_ip = smolmachines_bundle_subnet(slug)

bot_bottle/backend/smolmachines/sidecar_bundle.py

@@ -1,39 +1,24 @@
-"""Per-bottle sidecar bundle bringup for the smolmachines backend
+"""Per-bottle sidecar bundle bringup for the smolmachines backend.
-(PRD 0023).
 
-Two docker resources per bottle live here:
+The sidecar bundle runs as its own smolVM. The agent VM reaches
-
+bundle daemons through host-loopback ports published by that sidecar
-  - **A dedicated bridge network**, subnet derived from the slug.
+VM and wrapped by per-bottle address-bound forwarders."""
-    The bundle container gets a pinned IP at `<subnet>.2` so the
-    smolvm guest's TSI allowlist (`<bundle-ip>/32`) has a stable
-    target. Without pinning, we'd have to inspect the container's
-    assigned IP after start and feed it back into the Smolfile
-    — a race we can sidestep with `--ip`.
-
-  - **The bundle container itself**, running the PRD 0024 bundle
-    image (`bot-bottle-sidecars:latest` by default). Same
-    image, same daemons, same daemon-private env / bind-mounts
-    as the docker backend.
-
-This module ships the lifecycle primitives only — create
-network, start bundle, stop bundle, remove network — wrapped
-around `subprocess.run(["docker", ...])`. Wiring them into the
-launch flow + populating the `BundleLaunchSpec` from the inner
-Plans (EgressPlan, …) lands in chunk 2d."""
 
 from __future__ import annotations
 
-import subprocess
+import os
+import socket
 from dataclasses import dataclass, field
 from pathlib import Path
 from typing import Sequence
 
-from ...log import die, warn
+from ...log import warn
 from ..docker import util as docker_mod
 from ..docker.sidecar_bundle import (
     SIDECAR_BUNDLE_DOCKERFILE,
     SIDECAR_BUNDLE_IMAGE,
 )
+from . import smolvm as _smolvm
 
 
 _REPO_DIR = str(Path(__file__).resolve().parent.parent.parent.parent)
@@ -54,6 +39,11 @@ def bundle_container_name(slug: str) -> str:
     return f"bot-bottle-sidecars-{slug}"
 
 
+def bundle_machine_name(slug: str) -> str:
+    """Sidecar smolVM machine name."""
+    return bundle_container_name(slug)
+
+
 @dataclass(frozen=True)
 class BundleLaunchSpec:
     """Everything `start_bundle` needs to bring up one bundle
@@ -70,10 +60,8 @@ class BundleLaunchSpec:
     # supervisor inside the bundle reads it to skip
     # bottle-irrelevant daemons (e.g. supervise=False bottles).
     daemons_csv: str = "egress"
-    # Plain "KEY=VALUE" strings + "KEY" bare names (the bare-name
+    # Plain "KEY=VALUE" strings + "KEY" bare names. Bare names inherit
-    # form inherits the value from the docker-run subprocess env,
+    # from the host env passed to the sidecar VM launch.
-    # matching the docker backend's compose-up secret-forwarding
-    # pattern).
     environment: Sequence[str] = field(default_factory=tuple)
     # (host_path, container_path, read_only) bind mounts.
     volumes: Sequence[tuple[str, str, bool]] = field(default_factory=tuple)
@@ -92,6 +80,11 @@ class BundleLaunchSpec:
     publish_host_ip: str = "127.0.0.1"
 
 
+@dataclass(frozen=True)
+class BundleVmLaunch:
+    raw_ports: dict[int, int]
+
+
 def ensure_bundle_image(image: str = SIDECAR_BUNDLE_IMAGE) -> None:
     """Build the sidecar bundle image before `docker run`.
 
@@ -107,136 +100,65 @@ def ensure_bundle_image(image: str = SIDECAR_BUNDLE_IMAGE) -> None:
     )
 
 
-def create_bundle_network(network_name: str, subnet: str, gateway: str) -> None:
+def allocate_raw_host_ports(container_ports: Sequence[int]) -> dict[int, int]:
-    """`docker network create` with an explicit subnet + gateway
+    """Reserve candidate host loopback ports for smolVM `-p HOST:GUEST`.
-    so the bundle's `--ip` lands on the address the Smolfile's
+
-    TSI allowlist points at. Idempotent on the caller's side —
+    The sockets are closed before smolVM binds them, so this remains
-    `start_bundle` catches the "network exists" error and treats
+    best-effort. smolVM failing to bind a selected port is fatal in
-    it as success (chunk-2d teardown is paired with each create).
+    the caller's launch path."""
-    """
+    out: dict[int, int] = {}
-    result = subprocess.run(
+    for container_port in container_ports:
-        ["docker", "network", "create",
+        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
-         "--subnet", subnet, "--gateway", gateway,
+            sock.bind(("127.0.0.1", 0))
-         network_name],
+            out[container_port] = int(sock.getsockname()[1])
-        capture_output=True, text=True, check=False,
+    return out
-    )
-    if result.returncode != 0:
-        # Already-exists is fine on a resume path; everything else
-        # is fatal — the bundle won't have an addressable network.
-        if "already exists" in (result.stderr or "").lower():
-            return
-        die(
-            f"docker network create {network_name} failed: "
-            f"{(result.stderr or '').strip()}"
-        )
 
 
-def remove_bundle_network(network_name: str) -> None:
+def start_bundle_vm(
-    """Idempotent: a missing network returns success."""
+    spec: BundleLaunchSpec,
-    result = subprocess.run(
+    *,
-        ["docker", "network", "rm", network_name],
+    from_path: Path,
-        capture_output=True, text=True, check=False,
+    host_env: dict[str, str] | None = None,
-    )
+) -> BundleVmLaunch:
-    if result.returncode == 0:
+    """Create and start the sidecar bundle as a smolVM.
-        return
-    if "no such network" in (result.stderr or "").lower():
-        return
-    # Network with attached containers is the common non-fatal
-    # case during a partial teardown — warn but don't die.
-    warn(
-        f"docker network rm {network_name} failed: "
-        f"{(result.stderr or '').strip()}"
-    )
 
-
+    smolVM's own published ports are raw host-loopback ports. The
-def start_bundle(spec: BundleLaunchSpec, *,
+    launch flow wraps them with per-bottle address-bound forwarders
-                 env: dict[str, str] | None = None) -> None:
+    before exposing anything to the agent VM."""
-    """Bring the bundle container up on the per-bottle bridge with
+    raw_ports = allocate_raw_host_ports(spec.ports_to_publish)
-    the pinned IP. Argv is built deterministically from `spec`;
+    effective_host_env = host_env if host_env is not None else os.environ
-    `env` is the host subprocess env (forwarded values for any
+    env: dict[str, str] = {"BOT_BOTTLE_SIDECAR_DAEMONS": spec.daemons_csv}
-    bare-name entries in `spec.environment`)."""
-    container = bundle_container_name(spec.slug)
-    argv = [
-        "docker", "run",
-        "--name", container,
-        "--detach",
-        "--rm",
-        "--network", spec.network_name,
-        "--ip", spec.bundle_ip,
-        "-e", f"BOT_BOTTLE_SIDECAR_DAEMONS={spec.daemons_csv}",
-    ]
     for entry in spec.environment:
-        argv += ["-e", entry]
+        name, sep, value = entry.partition("=")
-    for host_path, container_path, read_only in spec.volumes:
+        if sep:
-        suffix = ":ro" if read_only else ""
+            env[name] = value
-        argv += ["-v", f"{host_path}:{container_path}{suffix}"]
+        elif entry in effective_host_env:
-    # Loopback-only host port-forwards — the smolvm guest's TSI
+            env[entry] = effective_host_env[entry]
-    # uses macOS networking, and macOS loopback is the only host
+    name = bundle_machine_name(spec.slug)
-    # surface that round-trips into Docker Desktop's daemon VM.
+    _smolvm.machine_create(
-    # Binds to the per-bottle alias so TSI's IP-only allowlist
+        name,
-    # narrows reachability to this bottle's bundle only.
+        from_path=from_path,
-    for port in spec.ports_to_publish:
+        net=True,
-        argv += ["-p", f"{spec.publish_host_ip}::{port}"]
+        env=env,
-    argv.append(spec.image)
+        volumes=spec.volumes,
-    result = subprocess.run(
+        ports=tuple(
-        argv, capture_output=True, text=True,
+            (host_port, guest_port)
-        env=dict(env) if env is not None else None, check=False,
+            for guest_port, host_port in raw_ports.items()
+        ),
     )
-    if result.returncode != 0:
+    _smolvm.machine_start(name)
-        die(
+    _smolvm.wait_exec_ready(name)
-            f"docker run for bundle {container} failed: "
+    return BundleVmLaunch(raw_ports=raw_ports)
-            f"{(result.stderr or '').strip()}"
-        )
 
 
-def bundle_host_port(
+def stop_bundle_vm(slug: str) -> None:
-    slug: str, container_port: int, *, host_ip: str = "127.0.0.1",
+    """Best-effort sidecar VM teardown."""
-) -> int:
+    name = bundle_machine_name(slug)
-    """`docker port <bundle> <container_port>/tcp` → the random
+    try:
-    host-side port docker assigned for the binding on `host_ip`.
+        _smolvm.machine_stop(name)
-    Called after `start_bundle` on each container port listed in
+    except _smolvm.SmolvmError as exc:
-    `BundleLaunchSpec.ports_to_publish` so the launch step can
+        warn(f"smolvm machine stop {name} failed: {exc}")
-    build the agent's HTTPS_PROXY / GIT_GATE / SUPERVISE URLs in
+    try:
-    `<host_ip>:<host port>` form."""
+        _smolvm.machine_delete(name)
-    container = bundle_container_name(slug)
+    except _smolvm.SmolvmError as exc:
-    result = subprocess.run(
+        warn(f"smolvm machine delete {name} failed: {exc}")
-        ["docker", "port", container, f"{container_port}/tcp"],
-        capture_output=True, text=True, check=False,
-    )
-    if result.returncode != 0:
-        die(
-            f"docker port {container} {container_port}/tcp failed: "
-            f"{(result.stderr or '').strip() or '<no stderr>'}"
-        )
-    # Each line looks like `127.0.0.16:54321` — one per address
-    # family / host IP. Match on the expected host_ip prefix so
-    # bottles bound to per-bottle aliases pick the right line.
-    for raw in (result.stdout or "").splitlines():
-        line = raw.strip()
-        if line.startswith(f"{host_ip}:"):
-            _, _, port_str = line.rpartition(":")
-            try:
-                return int(port_str)
-            except ValueError:
-                die(f"unexpected `docker port` output: {line!r}")
-    die(
-        f"no port mapping on {host_ip} for {container} "
-        f"{container_port}/tcp; got: {(result.stdout or '').strip()!r}"
-    )
-
-
-def stop_bundle(slug: str) -> None:
-    """Idempotent: a missing container returns success."""
-    container = bundle_container_name(slug)
-    result = subprocess.run(
-        ["docker", "rm", "-f", container],
-        capture_output=True, text=True, check=False,
-    )
-    if result.returncode == 0:
-        return
-    if "no such container" in (result.stderr or "").lower():
-        return
-    warn(
-        f"docker rm -f {container} failed: "
-        f"{(result.stderr or '').strip()}"
-    )

bot_bottle/backend/smolmachines/smolvm.py

@@ -113,13 +113,15 @@ def machine_create(
     *,
     image: str | None = None,
     from_path: Path | None = None,
+    net: bool = False,
     allow_cidrs: Sequence[str] = (),
     env: Mapping[str, str] | None = None,
+    ports: Sequence[tuple[int, int]] = (),
+    volumes: Sequence[tuple[str, str, bool]] = (),
 ) -> None:
-    """`smolvm machine create NAME [--image IMG | --from PATH]
+    """`smolvm machine create --name NAME [--image IMG | --from PATH]
-    [--allow-cidr CIDR ...] [-e K=V ...]`. NAME is positional
+    [--allow-cidr CIDR ...] [-e K=V ...]`. NAME is passed as
-    (the CLI's exception to the `--name` pattern other
+    `--name` (smolvm 1.4.7+; earlier versions took it positionally).
-    subcommands use).
 
     `image` (registry ref like `alpine:latest`) and `from_path`
     (a `.smolmachine` artifact) are mutually exclusive — one or
@@ -132,25 +134,27 @@ def machine_create(
     no-pull-at-start property. The flag form gives the same
     result without the Smolfile complication.
 
-    `--net` is sent explicitly when `allow_cidrs` is non-empty.
+    `--net` is sent explicitly when `net=True` or `allow_cidrs` is
-    smolvm 0.8.0's docs say `--allow-cidr` implies `--net`, but
+    non-empty. `--allow-cidr` implies `--net` per the CLI help, but
-    empirically the implication only fires when no `--from` is
+    sending `--net` explicitly is harmless and ensures the guest has
-    set — `--from PATH --allow-cidr X/32` silently produces a
+    network access even if that implication changes across versions."""
-    machine with `network: false` and no routes in the guest, so
+    args: list[str] = ["machine", "create", "--name", name]
-    the agent can't reach the bundle's pinned IP."""
-    args: list[str] = ["machine", "create"]
     if image is not None:
         args += ["--image", image]
     if from_path is not None:
         args += ["--from", str(from_path)]
-    if allow_cidrs:
+    if net or allow_cidrs:
         args.append("--net")
     for cidr in allow_cidrs:
         args += ["--allow-cidr", cidr]
+    for host_port, guest_port in ports:
+        args += ["-p", f"{host_port}:{guest_port}"]
+    for host_path, guest_path, read_only in volumes:
+        suffix = ":ro" if read_only else ""
+        args += ["-v", f"{host_path}:{guest_path}{suffix}"]
     if env:
         for k, v in env.items():
             args += ["-e", f"{k}={v}"]
-    args.append(name)
     _smolvm(*args)
 
 
@@ -182,10 +186,9 @@ def machine_stop(name: str) -> None:
 
 
 def machine_delete(name: str) -> None:
-    """`smolvm machine delete -f NAME`. NAME is positional. `-f`
+    """`smolvm machine delete --name NAME -f`. `-f` skips the
-    skips the interactive confirmation — required for
+    interactive confirmation — required for non-interactive teardown."""
-    non-interactive teardown."""
+    _smolvm("machine", "delete", "--name", name, "-f")
-    _smolvm("machine", "delete", "-f", name)
 
 
 def machine_exec(

bot_bottle/backend/smolmachines/util.py

@@ -5,26 +5,58 @@ unit-tested without importing the docker subprocess paths."""
 from __future__ import annotations
 
 import hashlib
+import os
+import platform
 import shutil
 
 from ...log import die
 
+# libkrun's Linux backend drives the guest through KVM, so the host
+# must expose `/dev/kvm` and the invoking user must be able to open
+# it. macOS uses Hypervisor.framework and needs no device node.
+_KVM_DEVICE = "/dev/kvm"
+
 
 def smolmachines_preflight() -> None:
-    """Ensure `smolvm` is on PATH before the launch flow runs.
+    """Ensure the host can run the smolmachines backend before the
-    Called from `_resolve_plan`; gives the operator a clear
+    launch flow starts. Called from `_resolve_plan`; surfaces a
-    install pointer rather than a cryptic FileNotFoundError
+    clear, actionable error instead of a cryptic `smolvm` failure
-    later. `gvproxy` is no longer required — see the PRD's design
+    deep in launch.
-    pivot section."""
+
-    if shutil.which("smolvm") is not None:
+    Checks `smolvm` is on PATH (both platforms) and, on Linux,
-        return
+    that `/dev/kvm` exists and is accessible. `gvproxy` is no
-    die(
+    longer required — see the PRD's design pivot section."""
-        "BOT_BOTTLE_BACKEND=smolmachines requires `smolvm` on "
+    if shutil.which("smolvm") is None:
-        "PATH. Install with: "
+        die(
-        "curl -sSL https://smolmachines.com/install.sh | sh. "
+            "BOT_BOTTLE_BACKEND=smolmachines requires `smolvm` on "
-        "To use the legacy Docker backend instead, set "
+            "PATH. Install with: "
-        "BOT_BOTTLE_BACKEND=docker or pass --backend=docker."
+            "curl -sSL https://smolmachines.com/install.sh | sh. "
-    )
+            "To use the legacy Docker backend instead, set "
+            "BOT_BOTTLE_BACKEND=docker or pass --backend=docker."
+        )
+    if platform.system() == "Linux":
+        _preflight_kvm()
+
+
+def _preflight_kvm() -> None:
+    """Linux-only: libkrun needs `/dev/kvm`. Distinguish 'KVM not
+    enabled' from 'no permission' so the operator knows which to
+    fix."""
+    if not os.path.exists(_KVM_DEVICE):
+        die(
+            f"BOT_BOTTLE_BACKEND=smolmachines needs {_KVM_DEVICE} on "
+            "Linux but it is missing. Enable KVM: load the kvm-intel "
+            "or kvm-amd kernel module (and confirm virtualization is "
+            "enabled in BIOS/firmware). To use the legacy Docker "
+            "backend instead, set BOT_BOTTLE_BACKEND=docker."
+        )
+    if not os.access(_KVM_DEVICE, os.R_OK | os.W_OK):
+        die(
+            f"{_KVM_DEVICE} exists but is not readable/writable by the "
+            "current user. Add your user to the `kvm` group "
+            "(`sudo usermod -aG kvm \"$USER\"`) and re-login, or run "
+            "with access to the device."
+        )
 
 
 def smolmachines_bundle_subnet(slug: str) -> tuple[str, str, str]:

bot_bottle/bottle_state.py

@@ -284,9 +284,8 @@ def git_gate_state_dir(identity: str) -> Path:
 
 def supervise_state_dir(identity: str) -> Path:
     """State subdir reserved for supervise sidecar bind-mount sources.
-    The queue dir is intentionally NOT under here — it lives at
+    Runtime queue/audit rows live in the host-level bot-bottle SQLite
-    ~/.bot-bottle/queue/<slug>/ alongside the audit logs, so it
+    database, so they survive state-dir cleanup."""
-    survives state-dir cleanup."""
     return bottle_state_dir(identity) / _SUPERVISE_SUBDIR
 
 

bot_bottle/cli/__init__.py

@@ -7,8 +7,10 @@ from __future__ import annotations
 
 import sys
 
+from ..errors import MissingEnvVarError
 from ..log import Die, die, error
 from ..manifest import ManifestError
+from ..store_manager import StoreManager
 from ._common import PROG
 from . import list as _list_mod
 from .cleanup import cmd_cleanup
@@ -74,11 +76,25 @@ def main(argv: list[str] | None = None) -> int:
     if handler is None:
         usage()
         die(f"unknown command: {command}")
+    mgr = StoreManager.instance()
+    if not mgr.is_migrated():
+        sys.stderr.write("bot-bottle: database schema is out of date\n")
+        sys.stderr.write("Migrate now? [y/N] ")
+        sys.stderr.flush()
+        try:
+            answer = sys.stdin.readline().strip().lower()
+        except EOFError:
+            answer = ""
+        if answer != "y":
+            error("migration required — re-run and confirm to migrate")
+            return 1
+        mgr.migrate()
     try:
         return handler(rest) or 0
+    except MissingEnvVarError as e:
+        error(str(e))
+        return 1
     except ManifestError as e:
-        # Manifest/config problems surface as a catchable exception;
-        # print the reason and exit non-zero (same UX die() used to give).
         error(str(e))
         return 1
     except Die as e:

bot_bottle/cli/start.py

@@ -108,6 +108,13 @@ def cmd_start(argv: list[str]) -> int:
 
     agent_name: str | None = args.name
     if agent_name is None:
+        if not manifest.all_agent_names:
+            print(
+                "bot-bottle: no agents defined. "
+                "Add an agent to ~/.bot-bottle/agents/ or ./bot-bottle/agents/ to get started.",
+                file=sys.stderr,
+            )
+            return 1
         agent_name = tui.filter_select(
             manifest.all_agent_names,
             title="Select agent",
@@ -202,6 +209,7 @@ def _start_headless(
         label=label,
         color=args.color or "",
         bottle_names=bottle_names,
+        headless=True,
     )
     return _launch_bottle(
         spec,
@@ -235,7 +243,7 @@ def prepare_with_preflight(
     spec: BottleSpec,
     *,
     stage_dir: Path,
-    render_preflight: Callable[[DockerBottlePlan], None],
+    render_preflight: Callable[[DockerBottlePlan, str], None],
     prompt_yes: Callable[[], bool],
     dry_run: bool = False,
     backend_name: str | None = None,
@@ -256,7 +264,7 @@ def prepare_with_preflight(
     plan = backend.prepare(spec, stage_dir=stage_dir)
     identity = _identity_from_plan(plan)
 
-    render_preflight(plan)
+    render_preflight(plan, backend.name)
 
     if dry_run:
         info("dry-run requested; not starting container.")
@@ -383,8 +391,9 @@ def _text_prompt_yes() -> bool:
 
 
 def _text_render_preflight():
-    def _render(plan: DockerBottlePlan) -> None:
+    def _render(plan: DockerBottlePlan, backend_name: str) -> None:
         print(file=sys.stderr)
+        print(f"backend: {backend_name}", file=sys.stderr)
         print(_manifest_to_yaml(plan.manifest), file=sys.stderr)
     return _render
 

bot_bottle/cli/supervise.py

@@ -45,7 +45,7 @@ from ..supervise import (
     TOOL_EGRESS_BLOCK,
     TOOL_GITLEAKS_ALLOW,
     TOOL_EGRESS_TOKEN_ALLOW,
-    list_pending_proposals,
+    list_all_pending_proposals,
     render_diff,
     write_audit_entry,
     write_response,
@@ -63,10 +63,9 @@ _REPORT_ONLY_TOOLS: tuple[str, ...] = (TOOL_GITLEAKS_ALLOW, TOOL_EGRESS_TOKEN_AL
 
 @dataclass(frozen=True)
 class QueuedProposal:
-    """A pending proposal plus the queue dir it was found in."""
+    """A pending proposal from the supervise queue."""
 
     proposal: Proposal
-    queue_dir: Path
 
 
 # Errors any remediation engine may raise. Caught by the TUI key
@@ -86,16 +85,11 @@ def apply_routes_change(slug: str, content: str) -> tuple[str, str]:
 
 
 def discover_pending() -> list[QueuedProposal]:
-    """Walk ~/.bot-bottle/queue/* and collect pending proposals."""
+    """Collect pending proposals across bottles."""
-    queue_root = _supervise.bot_bottle_root() / "queue"
+    out = [
-    if not queue_root.is_dir():
+        QueuedProposal(proposal=proposal)
-        return []
+        for proposal in list_all_pending_proposals()
-    out: list[QueuedProposal] = []
+    ]
-    for slug_dir in sorted(queue_root.iterdir()):
-        if not slug_dir.is_dir():
-            continue
-        for proposal in list_pending_proposals(slug_dir):
-            out.append(QueuedProposal(proposal=proposal, queue_dir=slug_dir))
     out.sort(key=lambda q: q.proposal.arrival_timestamp)
     return out
 
@@ -118,7 +112,6 @@ def _detail_lines(
         (f"tool: {p.tool}", 0),
         (f"id: {p.id}", 0),
         (f"arrived: {p.arrival_timestamp}", 0),
-        (f"queue: {qp.queue_dir}", 0),
         ("", 0),
         ("justification:", 0),
     ]
@@ -165,7 +158,7 @@ def approve(
         notes=notes,
         final_file=final_file,
     )
-    write_response(qp.queue_dir, response)
+    write_response(qp.proposal.bottle_slug, response)
     _write_audit(
         qp, action=status, notes=notes,
         diff_before=diff_before, diff_after=diff_after,
@@ -179,7 +172,7 @@ def reject(qp: QueuedProposal, *, reason: str) -> None:
         notes=reason,
         final_file=None,
     )
-    write_response(qp.queue_dir, response)
+    write_response(qp.proposal.bottle_slug, response)
     _write_audit(qp, action=STATUS_REJECTED, notes=reason, diff_before="", diff_after="")
 
 

bot_bottle/contrib/claude/Dockerfile

@@ -21,7 +21,7 @@ FROM node:22-slim
 # to it) works against egress's bumped TLS without the agent needing
 # local DNS.
 RUN apt-get update \
-  && apt-get install -y --no-install-recommends git ca-certificates curl ripgrep \
+  && apt-get install -y --no-install-recommends git ca-certificates curl ripgrep iproute2 dnsutils \
   && rm -rf /var/lib/apt/lists/*
 
 # App-specific deps. Python isn't required by claude-code itself

bot_bottle/contrib/codex/agent_provider.py

@@ -34,6 +34,12 @@ if TYPE_CHECKING:
 
 
 _SUPERVISE_MCP_NAME = "supervise"
+_CODEX_CLI = "/home/node/.codex/packages/standalone/current/bin/codex"
+_CODEX_CLI_PATH = (
+    "/home/node/.local/bin:"
+    "/home/node/.codex/packages/standalone/current/bin:"
+    "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+)
 
 
 def _skills_dir(guest_home: str) -> str:
@@ -50,7 +56,7 @@ def _prompt_path(guest_home: str) -> str:
 
 _RUNTIME = AgentProviderRuntime(
     template="codex",
-    command="codex",
+    command=_CODEX_CLI,
     image="bot-bottle-codex:latest",
     prompt_mode="read_prompt_file",
     bypass_args=("--dangerously-bypass-approvals-and-sandbox",),
@@ -145,7 +151,8 @@ class CodexAgentProvider(AgentProvider):
                 "env",
                 f"HOME={guest_home}",
                 f"CODEX_HOME={auth_dir}",
-                "codex", "login", "status",
+                f"PATH={_CODEX_CLI_PATH}",
+                _CODEX_CLI, "login", "status",
             ), (
                 "codex host credentials: dummy auth was copied into the "
                 "guest, but Codex did not accept it"
@@ -267,7 +274,7 @@ class CodexAgentProvider(AgentProvider):
             return
         info(f"registering supervise MCP server in agent codex config → {supervise_url}")
         r = bottle.exec(
-            f"codex mcp add {_SUPERVISE_MCP_NAME} --url "
+            f"{shlex.quote(_CODEX_CLI)} mcp add {_SUPERVISE_MCP_NAME} --url "
             f"{shlex.quote(supervise_url)}",
             user="node",
         )

bot_bottle/db_store.py

@@ -0,0 +1,59 @@
+"""Shared SQLite-backed store base class for bot-bottle (PRD 0013)."""
+
+from __future__ import annotations
+
+import sqlite3
+from pathlib import Path
+
+try:
+    from .migrations import TableMigrations
+except ImportError:
+    from migrations import TableMigrations  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+
+
+class DbVersionError(Exception):
+    """Raised when the on-disk schema is behind the current migration list."""
+
+
+class DbStore:
+    """Base for SQLite-backed stores. Subclasses resolve db_path then call super().__init__."""
+
+    def __init__(self, db_path: Path, migrations: TableMigrations) -> None:
+        self.db_path = db_path
+        self._migrations = migrations
+        self.db_path.parent.mkdir(parents=True, exist_ok=True)
+
+    def _connect(self) -> sqlite3.Connection:
+        conn = sqlite3.connect(self.db_path)
+        conn.row_factory = sqlite3.Row
+        return conn
+
+    def is_migrated(self) -> bool:
+        """Return True if the DB is fully up-to-date, False if migration is needed."""
+        if not self.db_path.exists():
+            return False
+        try:
+            with self._connect() as conn:
+                row = conn.execute(
+                    "SELECT version FROM schema_versions WHERE module = ?",
+                    (self._migrations.schema_key,),
+                ).fetchone()
+        except sqlite3.OperationalError:
+            return False
+        version = row[0] if row else 0
+        return version == len(self._migrations.migrations)
+
+    def migrate(self) -> None:
+        """Apply any pending migrations and set permissions on the DB file."""
+        with self._connect() as conn:
+            self._migrations.apply(conn)
+        self._chmod()
+
+    def _chmod(self) -> None:
+        try:
+            self.db_path.chmod(0o600)
+        except OSError:
+            pass
+
+
+__all__ = ["DbStore", "DbVersionError"]

bot_bottle/egress.py

@@ -23,6 +23,7 @@ from .egress_addon_core import (
     PathMatch as CorePathMatch,
     Route,
 )
+from .errors import MissingEnvVarError
 from .log import die
 
 if TYPE_CHECKING:
@@ -354,16 +355,18 @@ def egress_resolve_token_values(
     for token_env, token_ref in token_env_map.items():
         value = host_env.get(token_ref)
         if value is None:
-            die(
+            raise MissingEnvVarError(
+                token_ref,
                 f"egress: host env var '{token_ref}' is unset. Set it "
                 f"before launching, or remove the corresponding auth block "
-                f"from bottle.egress.routes."
+                f"from bottle.egress.routes.",
             )
         if not value:
-            die(
+            raise MissingEnvVarError(
+                token_ref,
                 f"egress: host env var '{token_ref}' is empty. The "
                 f"egress will not inject an empty token; set it to "
-                f"the real value or remove the route's auth block."
+                f"the real value or remove the route's auth block.",
             )
         out[token_env] = value
     return out

bot_bottle/egress_addon.py

@@ -79,14 +79,13 @@ class EgressAddon:
         # only — a restart re-prompts. Mutated only from the asyncio loop that
         # runs the addon hooks, so no lock is needed.
         self.safe_tokens: set[str] = set()
-        self._supervise_queue_dir = os.environ.get("SUPERVISE_QUEUE_DIR", "").strip()
         self._supervise_slug = os.environ.get("SUPERVISE_BOTTLE_SLUG", "").strip()
         self._token_allow_timeout = _token_allow_timeout_from_env(os.environ)
         self._reload(initial=True)
         self._install_sighup()
 
     def _supervise_available(self) -> bool:
-        return bool(self._supervise_queue_dir and self._supervise_slug)
+        return bool(self._supervise_slug)
 
     def _reload(self, *, initial: bool = False) -> None:
         try:
@@ -393,9 +392,8 @@ class EgressAddon:
             justification=_TOKEN_ALLOW_JUSTIFICATION,
             current_file_hash=_sv.sha256_hex(payload),
         )
-        queue_dir = Path(self._supervise_queue_dir)
         try:
-            _sv.write_proposal(queue_dir, proposal)
+            _sv.write_proposal(proposal)
         except OSError as e:
             sys.stderr.write(
                 f"egress: could not queue token-allow proposal: {e}; "
@@ -411,8 +409,8 @@ class EgressAddon:
             **self._req_ctx(flow),
         }) + "\n")
 
-        response = await self._await_token_response(queue_dir, proposal.id)
+        response = await self._await_token_response(proposal.id)
-        _sv.archive_proposal(queue_dir, proposal.id)
+        _sv.archive_proposal(self._supervise_slug, proposal.id)
 
         if response is not None and response.status in (
             _sv.STATUS_APPROVED, _sv.STATUS_MODIFIED,
@@ -439,16 +437,15 @@ class EgressAddon:
 
     async def _await_token_response(
         self,
-        queue_dir: Path,
         proposal_id: str,
     ) -> "_sv.Response | None":
-        """Poll the queue dir for the operator's response without blocking the
+        """Poll the DB for the operator's response without blocking the
         proxy event loop. Returns the Response, or None on timeout."""
         loop = asyncio.get_running_loop()
         deadline = loop.time() + self._token_allow_timeout
         while True:
             try:
-                return _sv.read_response(queue_dir, proposal_id)
+                return _sv.read_response(self._supervise_slug, proposal_id)
             except (OSError, ValueError, KeyError):
                 # Not written yet, or a partial/malformed write — retry until
                 # the deadline, then fail closed.

bot_bottle/env.py

@@ -35,6 +35,7 @@ import re
 import sys
 from dataclasses import dataclass, field
 
+from .errors import MissingEnvVarError
 from .log import die
 from .manifest import Manifest
 
@@ -136,9 +137,10 @@ def resolve_env(manifest: Manifest) -> ResolvedEnv:
             host_var = env_entry_interpolated_from(raw)
             host_value = os.environ.get(host_var, "")
             if not host_value:
-                die(
+                raise MissingEnvVarError(
+                    host_var,
                     f"env entry {name} is interpolated from ${host_var}, "
-                    f"but ${host_var} is unset or empty in the host environment."
+                    f"but ${host_var} is unset or empty in the host environment.",
                 )
             forwarded[name] = host_value
         else:  # literal

bot_bottle/errors.py

@@ -0,0 +1,18 @@
+"""bot-bottle application-level exception hierarchy.
+
+Exceptions here are caught by the CLI dispatcher (``cli/__init__.py``)
+and rendered as ``bot-bottle: error: …`` lines — same UX as ``die()``,
+but without coupling library code to stderr output."""
+
+from __future__ import annotations
+
+
+class MissingEnvVarError(Exception):
+    """Raised when a required host environment variable is unset or empty.
+
+    ``var_name`` is the exact name of the missing variable so callers
+    can display it without re-parsing the message string."""
+
+    def __init__(self, var_name: str, message: str) -> None:
+        self.var_name = var_name
+        super().__init__(message)

bot_bottle/git_gate.py

@@ -30,7 +30,6 @@ backend-specific and lives on concrete subclasses (see
 
 from __future__ import annotations
 
-import dataclasses
 from abc import ABC
 from dataclasses import dataclass
 from pathlib import Path
@@ -53,6 +52,7 @@ from .git_gate_render import (
     _gitconfig_validate_value,
 )
 from .git_gate_provision import (
+    provision_git_gate_dynamic_keys,
     revoke_git_gate_provisioned_keys,
     _provision_dynamic_key,
     _resolve_identity_file,
@@ -82,6 +82,7 @@ class GitGatePlan:
 
 
 
+
 class GitGate(ABC):
     """The per-agent git-gate. Encapsulates the host-side prepare
     (upstream lift + entrypoint/hook render); the sidecar's
@@ -93,20 +94,14 @@ class GitGate(ABC):
         entrypoint, pre-receive hook, and access-hook scripts (mode
         600) under `stage_dir`. Pure host-side, no docker subprocess.
 
-        For `gitea` key entries, also generates and registers
+        For `gitea` key entries, the returned upstream intentionally
-        a fresh deploy key via the forge API and writes the private key
+        has an empty identity file. Backend launch fills that in after
-        + key ID to `stage_dir`.
+        the operator confirms the preflight.
 
         Returned plan is incomplete: the launch step must fill
         `internal_network` / `egress_network` via `dataclasses.replace`
         before passing the plan to `.start`."""
-        upstreams_list = list(git_gate_upstreams_for_bottle(bottle))
+        upstreams = git_gate_upstreams_for_bottle(bottle)
-        for i, entry in enumerate(bottle.git):
-            upstreams_list[i] = dataclasses.replace(
-                upstreams_list[i],
-                identity_file=_resolve_identity_file(entry, slug, stage_dir),
-            )
-        upstreams = tuple(upstreams_list)
         entrypoint = stage_dir / "git_gate_entrypoint.sh"
         entrypoint.write_text(git_gate_render_entrypoint(upstreams))
         entrypoint.chmod(0o600)
@@ -162,6 +157,7 @@ __all__ = [
     "git_gate_render_entrypoint",
     "git_gate_render_hook",
     "git_gate_render_access_hook",
+    "provision_git_gate_dynamic_keys",
     "revoke_git_gate_provisioned_keys",
     "_gitconfig_validate_value",
     "_provision_dynamic_key",

bot_bottle/git_gate_host_key.py

@@ -0,0 +1,268 @@
+"""Preflight host-key population for git-gate upstreams (issue #333).
+
+When a git-gate repo entry lacks a `host_key`, this module either:
+- headless: dies with a clear config error.
+- interactive: fetches the key via ssh-keyscan, prompts the operator to
+  confirm, and optionally persists it to the bottle config file on disk.
+
+Public entry point: `preflight_host_keys(manifest, headless=..., home_md=...)`.
+"""
+
+from __future__ import annotations
+
+import dataclasses
+import subprocess
+import sys
+from pathlib import Path
+from typing import cast
+
+from .log import die, info
+from .manifest import Manifest
+from .yaml_subset import YamlSubsetError, parse_frontmatter, serialize_yaml_subset
+
+
+# Preferred key types, most secure first.
+_KEY_TYPE_PREFERENCE = (
+    "ssh-ed25519",
+    "ecdsa-sha2-nistp256",
+    "ecdsa-sha2-nistp384",
+    "ecdsa-sha2-nistp521",
+    "ssh-rsa",
+)
+
+
+def fetch_host_key(host: str, port: str) -> str:
+    """Return an SSH public key for `host`:`port` via ssh-keyscan.
+
+    Returns the key in `<type> <base64-data>` format (the host prefix is
+    stripped so the result can be stored in `host_key` and later formatted
+    into a known_hosts line by `git_gate_known_hosts_line`).
+
+    Prefers ed25519 > ecdsa > rsa; falls back to the first key type
+    returned if none of the preferred types are present.
+
+    Raises `RuntimeError` on subprocess failure, timeout, or no result.
+    Uses only the Python stdlib (subprocess)."""
+    args = ["ssh-keyscan"]
+    if port and port != "22":
+        args += ["-p", port]
+    args.append(host)
+    try:
+        result = subprocess.run(
+            args, capture_output=True, text=True, timeout=15, check=False,
+        )
+    except OSError as e:
+        raise RuntimeError(
+            f"ssh-keyscan: could not launch for {host}:{port}: {e}"
+        ) from e
+    except subprocess.TimeoutExpired as e:
+        raise RuntimeError(f"ssh-keyscan timed out for {host}:{port}") from e
+
+    # known_hosts format: "[host]:port type data"  or  "host type data"
+    # Strip the host/port prefix; collect "type -> type data" by type.
+    found: dict[str, str] = {}
+    for line in result.stdout.splitlines():
+        line = line.strip()
+        if not line or line.startswith("#"):
+            continue
+        parts = line.split(None, 2)
+        if len(parts) == 3 and parts[1] not in found:
+            found[parts[1]] = f"{parts[1]} {parts[2]}"
+
+    for preferred in _KEY_TYPE_PREFERENCE:
+        if preferred in found:
+            return found[preferred]
+    if found:
+        return next(iter(found.values()))
+
+    raise RuntimeError(
+        f"ssh-keyscan returned no host key for {host}:{port}."
+        + (f" stderr: {result.stderr.strip()!r}" if result.stderr.strip() else "")
+    )
+
+
+# ---------------------------------------------------------------------------
+# Frontmatter editing
+# ---------------------------------------------------------------------------
+
+
+def add_host_key_to_frontmatter(file_text: str, repo_name: str, host_key: str) -> str:
+    """Return an updated copy of `file_text` with `host_key` set on the
+    named repo entry in the YAML frontmatter.
+
+    Parses the frontmatter into a dict, sets the key, and re-serializes.
+    Returns the original text unchanged when: the file has no frontmatter,
+    the git-gate.repos.<repo_name> entry is absent or already has a
+    host_key, or the frontmatter cannot be parsed."""
+    try:
+        fm, body = parse_frontmatter(file_text)
+    except YamlSubsetError:
+        return file_text
+
+    git_gate = fm.get("git-gate")
+    if not isinstance(git_gate, dict):
+        return file_text
+    repos = git_gate.get("repos")
+    if not isinstance(repos, dict):
+        return file_text
+    repo = repos.get(repo_name)
+    if not isinstance(repo, dict):
+        return file_text
+    if repo.get("host_key"):
+        return file_text
+
+    cast(dict[str, object], repo)["host_key"] = host_key
+    return f"---\n{serialize_yaml_subset(fm)}---\n{body}"
+
+
+def find_repo_bottle_file(bottles_dir: Path, repo_name: str) -> Path | None:
+    """Return the first `bottles_dir/*.md` that declares `repo_name` without
+    a `host_key`, without modifying anything.  Returns None if not found."""
+    if not bottles_dir.is_dir():
+        return None
+    for path in sorted(bottles_dir.glob("*.md")):
+        try:
+            text = path.read_text(encoding="utf-8")
+            fm, _ = parse_frontmatter(text)
+        except (OSError, UnicodeDecodeError, YamlSubsetError):
+            continue
+        git_gate = fm.get("git-gate")
+        if not isinstance(git_gate, dict):
+            continue
+        repos = git_gate.get("repos")
+        if not isinstance(repos, dict):
+            continue
+        repo = repos.get(repo_name)
+        if not isinstance(repo, dict) or repo.get("host_key"):
+            continue
+        return path
+    return None
+
+
+def find_and_update_bottle_file(
+    bottles_dir: Path, repo_name: str, host_key: str,
+) -> bool:
+    """Write `host_key` into the bottle file returned by `find_repo_bottle_file`.
+
+    Returns True on success, False when no suitable file is found or the
+    write fails."""
+    path = find_repo_bottle_file(bottles_dir, repo_name)
+    if path is None:
+        return False
+    try:
+        text = path.read_text(encoding="utf-8")
+    except (OSError, UnicodeDecodeError):
+        return False
+    updated = add_host_key_to_frontmatter(text, repo_name, host_key)
+    if updated == text:
+        return False
+    path.write_text(updated, encoding="utf-8")
+    info(f"wrote host_key for {repo_name!r} to {path}")
+    return True
+
+
+# ---------------------------------------------------------------------------
+# Interactive prompt helper
+# ---------------------------------------------------------------------------
+
+
+def prompt_tty(message: str) -> str:
+    """Write `message` to stderr and read a line from /dev/tty (or stdin)."""
+    sys.stderr.write(message)
+    sys.stderr.flush()
+    try:
+        with open("/dev/tty", "r", encoding="utf-8") as tty:
+            return tty.readline().rstrip("\n")
+    except OSError:
+        return sys.stdin.readline().rstrip("\n")
+
+
+# ---------------------------------------------------------------------------
+# Public API
+# ---------------------------------------------------------------------------
+
+
+def preflight_host_keys(
+    manifest: Manifest,
+    *,
+    headless: bool,
+    home_md: Path | None,
+) -> Manifest:
+    """Ensure every git-gate repo entry has a `host_key` configured.
+
+    For entries whose `KnownHostKey` is empty:
+    - headless: calls `die()` with a clear message naming the repos.
+    - interactive: fetches the key via ssh-keyscan, shows it to the
+      operator, and requests confirmation.  If accepted, optionally
+      persists it to the bottle config file on disk; the key is always
+      applied in memory for this launch regardless of the persistence
+      choice.  Aborted confirmation calls `die()`.
+
+    Returns a (possibly updated) Manifest.  If all entries already have
+    host keys the original manifest is returned unchanged."""
+    bottle = manifest.bottle
+    missing = [e for e in bottle.git if not e.KnownHostKey]
+    if not missing:
+        return manifest
+
+    if headless:
+        names = ", ".join(repr(e.Name) for e in missing)
+        die(
+            f"git-gate: no host_key configured for repo(s) {names}. "
+            f"Add host_key to each bottle git-gate.repos entry, or run "
+            f"interactively once to have it fetched and saved automatically."
+        )
+
+    bottles_dir = (home_md / "bottles") if home_md is not None else None
+    updated_entries = list(bottle.git)
+
+    for entry in missing:
+        host = entry.UpstreamHost
+        port = entry.UpstreamPort
+        label = f"git-gate.repos[{entry.Name!r}]"
+
+        info(f"{label}: no host_key configured; fetching from {host}:{port}")
+        try:
+            key = fetch_host_key(host, port)
+        except RuntimeError as e:
+            die(f"git-gate: {label}: {e}")
+
+        sys.stderr.write(f"\ngit-gate: host key for {label}:\n  {key}\n\n")
+        confirm = prompt_tty("Is this host key correct? [y/N] ")
+        if confirm.strip().lower() not in ("y", "yes"):
+            die(f"git-gate: {label}: host key not confirmed; aborting launch")
+
+        if bottles_dir is not None:
+            target_file = find_repo_bottle_file(bottles_dir, entry.Name)
+            if target_file is not None:
+                save = prompt_tty(
+                    f"Save host_key for {entry.Name!r} to {target_file}? [y/N] "
+                )
+                if save.strip().lower() in ("y", "yes"):
+                    ok = find_and_update_bottle_file(bottles_dir, entry.Name, key)
+                    if not ok:
+                        sys.stderr.write(
+                            f"git-gate: {label}: could not write to {target_file}; "
+                            f"host_key kept in memory for this session only\n"
+                        )
+            else:
+                sys.stderr.write(
+                    f"git-gate: {label}: no bottle config file found for "
+                    f"{entry.Name!r}; host_key kept in memory for this session only\n"
+                )
+
+        idx = next(i for i, e in enumerate(updated_entries) if e.Name == entry.Name)
+        updated_entries[idx] = dataclasses.replace(entry, KnownHostKey=key)
+
+    updated_bottle = dataclasses.replace(bottle, git=tuple(updated_entries))
+    return dataclasses.replace(manifest, bottle=updated_bottle)
+
+
+__all__ = [
+    "fetch_host_key",
+    "preflight_host_keys",
+    "add_host_key_to_frontmatter",
+    "find_repo_bottle_file",
+    "find_and_update_bottle_file",
+    "prompt_tty",
+]

bot_bottle/git_gate_provision.py

@@ -9,10 +9,17 @@ imported (`deploy_key_provisioner`) to keep its cost off the host path.
 from __future__ import annotations
 
 import os
+import dataclasses
 from pathlib import Path
+from typing import TYPE_CHECKING
 
+from .errors import MissingEnvVarError
 from .log import info
 from .manifest import ManifestBottle, ManifestGitEntry
+from .git_gate_render import GitGateUpstream
+
+if TYPE_CHECKING:
+    from .git_gate import GitGatePlan
 
 def _provision_dynamic_key(
     entry: ManifestGitEntry,
@@ -28,9 +35,10 @@ def _provision_dynamic_key(
     pk = entry.Key
     token = os.environ.get(pk.forge_token_env)
     if token is None:
-        raise RuntimeError(
+        raise MissingEnvVarError(
+            pk.forge_token_env,
             f"git-gate.repos[{entry.Name!r}] key.forge_token_env"
-            f" = {pk.forge_token_env!r}: env var is not set"
+            f" = {pk.forge_token_env!r}: env var is not set",
         )
     api_url = pk.api_url or f"https://{entry.UpstreamHost}"
     provisioner = get_provisioner(pk.provider, token, api_url)
@@ -72,10 +80,11 @@ def revoke_git_gate_provisioned_keys(bottle: ManifestBottle, stage_dir: Path) ->
         key_id = id_file.read_text().strip()
         token = os.environ.get(pk.forge_token_env)
         if token is None:
-            raise RuntimeError(
+            raise MissingEnvVarError(
+                pk.forge_token_env,
                 f"git-gate.repos[{entry.Name!r}] key.forge_token_env"
                 f" = {pk.forge_token_env!r}: env var is not set;"
-                f" cannot revoke deploy key {key_id}"
+                f" cannot revoke deploy key {key_id}",
             )
         api_url = pk.api_url or f"https://{entry.UpstreamHost}"
         provisioner = get_provisioner(pk.provider, token, api_url)
@@ -95,8 +104,45 @@ def _resolve_identity_file(entry: ManifestGitEntry, slug: str, stage_dir: Path)
     return entry.IdentityFile
 
 
+def provision_git_gate_dynamic_keys(
+    bottle: ManifestBottle,
+    plan: "GitGatePlan",
+    stage_dir: Path,
+) -> "GitGatePlan":
+    """Provision dynamic git-gate keys and return an updated plan.
+
+    This runs during backend launch, after the operator confirms the
+    preflight. Plan preparation intentionally stays side-effect-light:
+    dry-runs and aborted launches must not create remote deploy keys.
+    """
+    if not plan.upstreams:
+        return plan
+
+    upstreams_by_name: dict[str, GitGateUpstream] = {
+        upstream.name: upstream for upstream in plan.upstreams
+    }
+    updated: list[GitGateUpstream] = []
+    for entry in bottle.git:
+        upstream = upstreams_by_name.get(entry.Name)
+        if upstream is None:
+            continue
+        if entry.Key.provider == "gitea":
+            identity_file = _provision_dynamic_key(entry, plan.slug, stage_dir)
+            upstream = dataclasses.replace(upstream, identity_file=identity_file)
+        updated.append(upstream)
+
+    if len(updated) != len(plan.upstreams):
+        updated_names = {u.name for u in updated}
+        for upstream in plan.upstreams:
+            if upstream.name not in updated_names:
+                updated.append(upstream)
+
+    return dataclasses.replace(plan, upstreams=tuple(updated))
+
+
 __all__ = [
     "revoke_git_gate_provisioned_keys",
+    "provision_git_gate_dynamic_keys",
     "_provision_dynamic_key",
     "_resolve_identity_file",
 ]

bot_bottle/git_gate_render.py

@@ -228,19 +228,22 @@ supervise_gitleaks_allow() {
   fi
 
   proposal_id=$(
-    GITLEAKS_ALLOW_REF="$ref" python3 - "$report_file" <<'PY'
+    PYTHONPATH="/app${PYTHONPATH:+:$PYTHONPATH}" GITLEAKS_ALLOW_REF="$ref" python3 - "$report_file" <<'PY'
 import datetime
 import hashlib
 import json
 import os
 import sys
-import uuid
 from pathlib import Path
 
+try:
+    import supervise as _sv
+except ImportError:
+    from bot_bottle import supervise as _sv
+
 report_path = Path(sys.argv[1])
-queue_dir = os.environ.get("SUPERVISE_QUEUE_DIR", "")
 slug = os.environ.get("SUPERVISE_BOTTLE_SLUG", "")
-if not queue_dir or not slug:
+if not slug:
     sys.exit(2)
 
 try:
@@ -277,31 +280,19 @@ for i, finding in enumerate(raw, 1):
     ])
 
 payload = "\n".join(lines).rstrip() + "\n"
-proposal_id = str(uuid.uuid4())
+proposal = _sv.Proposal.new(
-proposal = {
+    bottle_slug=slug,
-    "id": proposal_id,
+    tool=_sv.TOOL_GITLEAKS_ALLOW,
-    "bottle_slug": slug,
+    proposed_file=payload,
-    "tool": "gitleaks-allow",
+    justification=(
-    "proposed_file": payload,
-    "justification": (
         "git-gate found gitleaks findings hidden by # gitleaks:allow; "
         "approve only for dummy test fixtures or confirmed false positives"
     ),
-    "arrival_timestamp": datetime.datetime.now(
+    current_file_hash=hashlib.sha256(payload.encode("utf-8")).hexdigest(),
-        datetime.timezone.utc
+    now=datetime.datetime.now(datetime.timezone.utc),
-    ).isoformat(),
+)
-    "current_file_hash": hashlib.sha256(payload.encode("utf-8")).hexdigest(),
+_sv.write_proposal(proposal)
-}
+print(proposal.id)
-queue = Path(queue_dir)
-queue.mkdir(parents=True, exist_ok=True)
-path = queue / f"{proposal_id}.proposal.json"
-tmp = path.with_suffix(path.suffix + ".tmp")
-with tmp.open("w", encoding="utf-8") as f:
-    json.dump(proposal, f, indent=2)
-    f.write("\n")
-os.chmod(tmp, 0o600)
-os.replace(tmp, path)
-print(proposal_id)
 PY
   )
   rc=$?
@@ -314,8 +305,7 @@ PY
     return 1
   fi
 
-  queue_dir=${SUPERVISE_QUEUE_DIR:-}
+  slug=${SUPERVISE_BOTTLE_SLUG:-}
-  response_file="$queue_dir/${proposal_id}.response.json"
   timeout=${SUPERVISE_GITLEAKS_ALLOW_TIMEOUT_SECONDS:-300}
   case "$timeout" in
     ''|*[!0-9]*)
@@ -327,26 +317,41 @@ PY
   echo "git-gate: approve with './cli.py supervise' to continue this push" >&2
   waited=0
   while [ "$waited" -lt "$timeout" ]; do
-    if [ -f "$response_file" ]; then
+    status=$(PYTHONPATH="/app${PYTHONPATH:+:$PYTHONPATH}" python3 - "$slug" "$proposal_id" <<'PY'
-      status=$(python3 - "$response_file" <<'PY'
-import json
 import sys
+
 try:
-    with open(sys.argv[1], encoding="utf-8") as f:
+    import supervise as _sv
-        raw = json.load(f)
+except ImportError:
-except (OSError, json.JSONDecodeError):
+    from bot_bottle import supervise as _sv
-    sys.exit(1)
+
-status = raw.get("status")
+slug = sys.argv[1]
-if not isinstance(status, str):
+try:
-    sys.exit(1)
+    response = _sv.read_response(slug, sys.argv[2])
-print(status)
+except FileNotFoundError:
+    sys.exit(2)
+print(response.status)
 PY
-      ) || status=""
+    )
+    rc=$?
+    if [ "$rc" -eq 2 ]; then
+      status=""
+    elif [ "$rc" -ne 0 ]; then
+      status="invalid"
+    fi
+    if [ -n "$status" ]; then
       case "$status" in
         approved|modified)
-          mkdir -p "$queue_dir/processed"
+          PYTHONPATH="/app${PYTHONPATH:+:$PYTHONPATH}" python3 - "$slug" "$proposal_id" <<'PY' || true
-          mv -f "$queue_dir/${proposal_id}.proposal.json" "$queue_dir/processed/" 2>/dev/null || true
+import sys
-          mv -f "$queue_dir/${proposal_id}.response.json" "$queue_dir/processed/" 2>/dev/null || true
+
+try:
+    import supervise as _sv
+except ImportError:
+    from bot_bottle import supervise as _sv
+
+_sv.archive_proposal(sys.argv[1], sys.argv[2])
+PY
           echo "git-gate: supervisor approved # gitleaks:allow for $ref" >&2
           return 0
           ;;
@@ -499,4 +504,3 @@ if ! git -C "$repo_dir" rev-parse --verify HEAD >/dev/null 2>&1; then
 fi
 exit 0
 """
-

bot_bottle/git_http_backend.py

@@ -16,11 +16,16 @@ from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
 from pathlib import Path
 from urllib.parse import urlsplit
 
-from .git_gate import GIT_GATE_TIMEOUT_SECS
-
 
 DEFAULT_PORT = 9420
 
+# Mirrors git_gate_render.GIT_GATE_TIMEOUT_SECS. Duplicated rather than
+# imported: this module ships as a flat top-level sibling in the sidecar
+# bundle image (see Dockerfile.sidecars), not as part of the bot_bottle
+# package, so `bot_bottle.git_gate` and its dependency chain aren't
+# available at runtime.
+GIT_GATE_TIMEOUT_SECS = 15
+
 # Bound memory use while still allowing ordinary git push packfiles.
 MAX_BODY_BYTES = 100 * 1024 * 1024
 

bot_bottle/migrations.py

@@ -0,0 +1,37 @@
+"""SQLite migration runner for bot-bottle stores."""
+
+from __future__ import annotations
+
+import sqlite3
+
+
+class TableMigrations:
+    """Runs a sequential list of DDL migrations tracked by schema_key in schema_versions."""
+
+    def __init__(self, schema_key: str, migrations: list[str]) -> None:
+        self.schema_key = schema_key
+        self.migrations = migrations
+
+    def apply(self, conn: sqlite3.Connection) -> None:
+        conn.execute(
+            """
+            CREATE TABLE IF NOT EXISTS schema_versions (
+                module TEXT PRIMARY KEY,
+                version INTEGER NOT NULL DEFAULT 0
+            )
+            """
+        )
+        row = conn.execute(
+            "SELECT version FROM schema_versions WHERE module = ?",
+            (self.schema_key,),
+        ).fetchone()
+        version = row[0] if row else 0
+        for i, sql in enumerate(self.migrations[version:], start=version + 1):
+            conn.execute(sql)
+            conn.execute(
+                "INSERT OR REPLACE INTO schema_versions (module, version) VALUES (?, ?)",
+                (self.schema_key, i),
+            )
+
+
+__all__ = ["TableMigrations"]

bot_bottle/queue_store.py

@@ -0,0 +1,215 @@
+"""SQLite-backed queue store for supervise proposals and responses (PRD 0013)."""
+
+from __future__ import annotations
+
+import os
+import sqlite3
+from pathlib import Path
+
+try:
+    from .supervise_types import Proposal, Response, host_db_path
+    from .db_store import DbStore
+    from .migrations import TableMigrations
+except ImportError:
+    from supervise_types import Proposal, Response, host_db_path  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+    from db_store import DbStore  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+    from migrations import TableMigrations  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+
+
+class QueueStore(DbStore):
+    """SQLite-backed persistent store for supervise proposals and responses."""
+
+    def __init__(self, queue_key: str, db_path: Path | None = None) -> None:
+        self.queue_key = queue_key
+        if db_path is not None:
+            resolved = db_path
+        else:
+            # In the sidecar container SUPERVISE_DB_PATH points at the
+            # bind-mounted host DB. On the host this env var is never set,
+            # so we always fall through to host_db_path().
+            env_path = os.environ.get("SUPERVISE_DB_PATH", "").strip()
+            resolved = Path(env_path) if env_path else host_db_path()
+        # One entry per schema version: migrations[0] brings a fresh DB to
+        # version 1, [1] to version 2, etc.  Add new entries at the end; never
+        # edit existing ones.
+        migrations = TableMigrations("queue_store", [
+            # v1 — proposals table
+            """
+            CREATE TABLE IF NOT EXISTS supervise_proposals (
+                queue_key TEXT NOT NULL,
+                id TEXT NOT NULL,
+                bottle_slug TEXT NOT NULL,
+                tool TEXT NOT NULL,
+                proposed_file TEXT NOT NULL,
+                justification TEXT NOT NULL,
+                arrival_timestamp TEXT NOT NULL,
+                current_file_hash TEXT NOT NULL,
+                archived INTEGER NOT NULL DEFAULT 0,
+                PRIMARY KEY (queue_key, id)
+            )
+            """,
+            # v2 — responses table
+            """
+            CREATE TABLE IF NOT EXISTS supervise_responses (
+                queue_key TEXT NOT NULL,
+                proposal_id TEXT NOT NULL,
+                status TEXT NOT NULL,
+                notes TEXT NOT NULL,
+                final_file TEXT,
+                archived INTEGER NOT NULL DEFAULT 0,
+                PRIMARY KEY (queue_key, proposal_id)
+            )
+            """,
+        ])
+        super().__init__(resolved, migrations)
+
+    def write_proposal(self, proposal: Proposal) -> Path:
+        with self._connect() as conn:
+            conn.execute(
+                """
+                INSERT OR REPLACE INTO supervise_proposals (
+                    queue_key, id, bottle_slug, tool, proposed_file, justification,
+                    arrival_timestamp, current_file_hash, archived
+                ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, 0)
+                """,
+                (
+                    self.queue_key,
+                    proposal.id,
+                    proposal.bottle_slug,
+                    proposal.tool,
+                    proposal.proposed_file,
+                    proposal.justification,
+                    proposal.arrival_timestamp,
+                    proposal.current_file_hash,
+                ),
+            )
+        self._chmod()
+        return self.db_path
+
+    def read_proposal(self, proposal_id: str) -> Proposal:
+        with self._connect() as conn:
+            row = conn.execute(
+                """
+                SELECT * FROM supervise_proposals
+                WHERE queue_key = ? AND id = ? AND archived = 0
+                """,
+                (self.queue_key, proposal_id),
+            ).fetchone()
+        if row is None:
+            raise FileNotFoundError(proposal_id)
+        return self._row_to_proposal(row)
+
+    def list_pending_proposals(self) -> list[Proposal]:
+        if not self.db_path.is_file():
+            return []
+        with self._connect() as conn:
+            rows = conn.execute(
+                """
+                SELECT p.* FROM supervise_proposals p
+                WHERE p.archived = 0
+                  AND p.queue_key = ?
+                  AND NOT EXISTS (
+                    SELECT 1 FROM supervise_responses r
+                    WHERE r.queue_key = p.queue_key
+                      AND r.proposal_id = p.id
+                      AND r.archived = 0
+                  )
+                ORDER BY p.arrival_timestamp, p.id
+                """,
+                (self.queue_key,),
+            ).fetchall()
+        return [self._row_to_proposal(row) for row in rows]
+
+    def list_all_pending_proposals(self) -> list[Proposal]:
+        if not self.db_path.is_file():
+            return []
+        with self._connect() as conn:
+            rows = conn.execute(
+                """
+                SELECT p.* FROM supervise_proposals p
+                WHERE p.archived = 0
+                  AND NOT EXISTS (
+                    SELECT 1 FROM supervise_responses r
+                    WHERE r.queue_key = p.queue_key
+                      AND r.proposal_id = p.id
+                      AND r.archived = 0
+                  )
+                ORDER BY p.arrival_timestamp, p.id
+                """
+            ).fetchall()
+        return [self._row_to_proposal(row) for row in rows]
+
+    def write_response(self, response: Response) -> Path:
+        with self._connect() as conn:
+            conn.execute(
+                """
+                INSERT OR REPLACE INTO supervise_responses (
+                    queue_key, proposal_id, status, notes, final_file, archived
+                ) VALUES (?, ?, ?, ?, ?, 0)
+                """,
+                (
+                    self.queue_key,
+                    response.proposal_id,
+                    response.status,
+                    response.notes,
+                    response.final_file,
+                ),
+            )
+        self._chmod()
+        return self.db_path
+
+    def read_response(self, proposal_id: str) -> Response:
+        with self._connect() as conn:
+            row = conn.execute(
+                """
+                SELECT * FROM supervise_responses
+                WHERE queue_key = ? AND proposal_id = ? AND archived = 0
+                """,
+                (self.queue_key, proposal_id),
+            ).fetchone()
+        if row is None:
+            raise FileNotFoundError(proposal_id)
+        return self._row_to_response(row)
+
+    def archive_proposal(self, proposal_id: str) -> None:
+        if not self.db_path.is_file():
+            return
+        with self._connect() as conn:
+            conn.execute(
+                """
+                UPDATE supervise_proposals SET archived = 1
+                WHERE queue_key = ? AND id = ?
+                """,
+                (self.queue_key, proposal_id),
+            )
+            conn.execute(
+                """
+                UPDATE supervise_responses SET archived = 1
+                WHERE queue_key = ? AND proposal_id = ?
+                """,
+                (self.queue_key, proposal_id),
+            )
+
+    @staticmethod
+    def _row_to_proposal(row: sqlite3.Row) -> Proposal:
+        return Proposal(
+            id=row["id"],
+            bottle_slug=row["bottle_slug"],
+            tool=row["tool"],
+            proposed_file=row["proposed_file"],
+            justification=row["justification"],
+            arrival_timestamp=row["arrival_timestamp"],
+            current_file_hash=row["current_file_hash"],
+        )
+
+    @staticmethod
+    def _row_to_response(row: sqlite3.Row) -> Response:
+        return Response(
+            proposal_id=row["proposal_id"],
+            status=row["status"],
+            notes=row["notes"],
+            final_file=row["final_file"],
+        )
+
+
+__all__ = ["QueueStore"]

bot_bottle/store_manager.py

@@ -0,0 +1,60 @@
+"""Singleton manager for all bot-bottle SQLite stores (PRD 0013)."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+try:
+    from .audit_store import AuditStore
+    from .queue_store import QueueStore
+except ImportError:
+    from audit_store import AuditStore  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+    from queue_store import QueueStore  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+
+_instance: StoreManager | None = None
+
+
+class StoreManager:
+    """Owns db_path and delegates migrate/is_migrated across all stores.
+
+    Use instance() for normal access. Call reset(db_path) in tests to swap
+    the singleton to a temp path, then reset() with no args to restore the
+    default."""
+
+    def __init__(self, db_path: Path | None = None) -> None:
+        if db_path is None:
+            # Lazy import to avoid a circular dependency: supervise imports
+            # StoreManager at module level; StoreManager must not import
+            # supervise at module level in return.
+            try:
+                from .supervise import host_db_path
+            except ImportError:
+                from supervise import host_db_path  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
+            db_path = host_db_path()
+        self.db_path = db_path
+
+    @classmethod
+    def instance(cls) -> StoreManager:
+        global _instance
+        if _instance is None:
+            _instance = cls()
+        return _instance
+
+    @classmethod
+    def reset(cls, db_path: Path | None = None) -> None:
+        """Replace the singleton. Pass db_path for test isolation; omit to restore default."""
+        global _instance
+        _instance = cls(db_path)
+
+    def is_migrated(self) -> bool:
+        return (
+            QueueStore("", self.db_path).is_migrated()
+            and AuditStore(self.db_path).is_migrated()
+        )
+
+    def migrate(self) -> None:
+        QueueStore("", self.db_path).migrate()
+        AuditStore(self.db_path).migrate()
+
+
+__all__ = ["StoreManager"]

bot_bottle/supervise.py

@@ -9,15 +9,14 @@ calls when it needs an operator-reviewed egress change:
 
 Each tool call: the agent passes the full proposed file plus a
 justification text. The sidecar validates the proposal syntactically,
-writes it to the host's per-bottle queue dir, and holds the tool-call
+writes it to the host SQLite queue table, and holds the tool-call
 connection open. The operator's supervise TUI
 (bot_bottle.cli.supervise) sees the proposal, accepts
-approve / modify / reject, and writes a response file alongside the
+approve / modify / reject, and writes a response row. The sidecar sees
-proposal. The sidecar sees the response and returns `{status, notes}`
+the response and returns `{status, notes}` to the agent.
-to the agent.
 
 This module defines the host-side library: dataclasses for the queue
-file shapes, queue read/write helpers, the audit log writer, and the
+record shapes, queue read/write helpers, the audit log writer, and the
 diff renderer. The in-container sidecar lives in
 bot_bottle/supervise_server.py; the supervise daemon's container
 lifecycle is owned by the sidecar bundle (PRD 0024).
@@ -31,37 +30,56 @@ remediation engines that wire real config changes land in PRDs 0014,
 
 from __future__ import annotations
 
-import dataclasses
 import difflib
 import hashlib
-import json
-import os
 import time
-import uuid
 from abc import ABC
 from dataclasses import dataclass
-from datetime import datetime, timezone
 from pathlib import Path
 
+try:
+    from .supervise_types import (
+        ACTION_OPERATOR_EDIT,
+        AuditEntry,
+        HOST_DB_FILENAME,
+        Proposal,
+        Response,
+        STATUSES,
+        STATUS_APPROVED,
+        STATUS_MODIFIED,
+        STATUS_REJECTED,
+        TOOLS,
+        TOOL_EGRESS_ALLOW,
+        TOOL_EGRESS_BLOCK,
+        TOOL_EGRESS_TOKEN_ALLOW,
+        TOOL_GITLEAKS_ALLOW,
+        TOOL_LIST_EGRESS_ROUTES,
+        bot_bottle_root,
+    )
+except ImportError:
+    from supervise_types import (  # type: ignore[import-not-found,no-redef]  # pylint: disable=import-error,no-name-in-module
+        ACTION_OPERATOR_EDIT,
+        AuditEntry,
+        HOST_DB_FILENAME,
+        Proposal,
+        Response,
+        STATUSES,
+        STATUS_APPROVED,
+        STATUS_MODIFIED,
+        STATUS_REJECTED,
+        TOOLS,
+        TOOL_EGRESS_ALLOW,
+        TOOL_EGRESS_BLOCK,
+        TOOL_EGRESS_TOKEN_ALLOW,
+        TOOL_GITLEAKS_ALLOW,
+        TOOL_LIST_EGRESS_ROUTES,
+        bot_bottle_root,
+    )
+
 
 SUPERVISE_HOSTNAME = "supervise"
 SUPERVISE_PORT = 9100
 
-TOOL_EGRESS_BLOCK = "egress-block"
-TOOL_EGRESS_ALLOW = "egress-allow"
-TOOL_GITLEAKS_ALLOW = "gitleaks-allow"
-# Written directly by the egress addon (not an agent-facing MCP tool) when an
-# outbound DLP token block is routed to the operator for override (PRD 0062).
-TOOL_EGRESS_TOKEN_ALLOW = "egress-token-allow"
-TOOL_LIST_EGRESS_ROUTES = "list-egress-routes"
-TOOLS: tuple[str, ...] = (
-    TOOL_EGRESS_ALLOW,
-    TOOL_EGRESS_BLOCK,
-    TOOL_GITLEAKS_ALLOW,
-    TOOL_EGRESS_TOKEN_ALLOW,
-    TOOL_LIST_EGRESS_ROUTES,
-)
-
 # The supervise sidecar uses these to query egress's
 # introspection endpoint for the `list-egress-routes` MCP
 # tool. The hostname + port match egress's docker network
@@ -77,236 +95,77 @@ COMPONENT_FOR_TOOL: dict[str, str] = {
     TOOL_EGRESS_BLOCK: "egress",
 }
 
-STATUS_APPROVED = "approved"
+DB_PATH_IN_CONTAINER = "/run/supervise/bot-bottle.db"
-STATUS_MODIFIED = "modified"
-STATUS_REJECTED = "rejected"
-STATUSES: tuple[str, ...] = (STATUS_APPROVED, STATUS_MODIFIED, STATUS_REJECTED)
-
-# Operator-initiated audit entries (no tool call). PRD 0014's
-# `routes edit <bottle>` verb writes entries with this action.
-ACTION_OPERATOR_EDIT = "operator-edit"
-
-QUEUE_DIR_IN_CONTAINER = "/run/supervise/queue"
 DEFAULT_POLL_INTERVAL_SEC = 0.5
 
 
 # --- Paths -----------------------------------------------------------------
 
 
-def bot_bottle_root() -> Path:
-    return Path.home() / ".bot-bottle"
-
-
-def queue_dir_for_slug(slug: str) -> Path:
-    return bot_bottle_root() / "queue" / slug
-
-
 def audit_dir() -> Path:
     return bot_bottle_root() / "audit"
 
 
+def host_db_path() -> Path:
+    # Calls bot_bottle_root() through this module's globals so that patches
+    # on supervise.bot_bottle_root propagate to callers going through
+    # supervise.host_db_path().
+    #
+    # Kept in its own "db" subdirectory (see supervise_types.host_db_path
+    # for why) — must stay in sync with that copy.
+    return bot_bottle_root() / "db" / HOST_DB_FILENAME
+
+
 def audit_log_path(component: str, slug: str) -> Path:
     return audit_dir() / f"{component}-{slug}.log"
 
 
-# --- Dataclasses -----------------------------------------------------------
+try:
-
+    from .queue_store import QueueStore
-
+    from .audit_store import AuditStore
-@dataclass(frozen=True)
+    from .store_manager import StoreManager
-class Proposal:
+except ImportError:
-    """One pending tool-call from the agent. The sidecar writes one
+    # Sidecar bundle: files are flat-copied under /app, not a package.
-    of these to the queue dir on a tool call; the operator's TUI
+    from queue_store import QueueStore  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
-    reads them; the sidecar polls for a matching Response."""
+    from audit_store import AuditStore  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
-
+    from store_manager import StoreManager  # type: ignore[import-not-found]  # pylint: disable=import-error,no-name-in-module
-    id: str
-    bottle_slug: str
-    tool: str
-    proposed_file: str
-    justification: str
-    arrival_timestamp: str
-    current_file_hash: str
-
-    @classmethod
-    def new(
-        cls,
-        *,
-        bottle_slug: str,
-        tool: str,
-        proposed_file: str,
-        justification: str,
-        current_file_hash: str,
-        now: datetime | None = None,
-    ) -> "Proposal":
-        ts = (now or datetime.now(timezone.utc)).isoformat()
-        return cls(
-            id=str(uuid.uuid4()),
-            bottle_slug=bottle_slug,
-            tool=tool,
-            proposed_file=proposed_file,
-            justification=justification,
-            arrival_timestamp=ts,
-            current_file_hash=current_file_hash,
-        )
-
-    def to_dict(self) -> dict[str, object]:
-        return dataclasses.asdict(self)
-
-    @classmethod
-    def from_dict(cls, raw: dict[str, object]) -> "Proposal":
-        tool = _require_str(raw, "tool")
-        if tool not in TOOLS:
-            raise ValueError(f"tool must be one of {TOOLS}; got {tool!r}")
-        return cls(
-            id=_require_str(raw, "id"),
-            bottle_slug=_require_str(raw, "bottle_slug"),
-            tool=tool,
-            proposed_file=_require_str(raw, "proposed_file"),
-            justification=_require_str(raw, "justification"),
-            arrival_timestamp=_require_str(raw, "arrival_timestamp"),
-            current_file_hash=_require_str(raw, "current_file_hash"),
-        )
-
-
-@dataclass(frozen=True)
-class Response:
-    """The operator's decision on a proposal. The TUI writes one of
-    these to the queue dir; the sidecar reads it and returns the
-    `{status, notes}` pair to the agent's tool call.
-
-    `final_file` carries the file content the supervisor will
-    actually apply: for `approved`, equal to the proposal's
-    `proposed_file`; for `modified`, the operator's edited version
-    (the audit diff is current → final_file, not current →
-    proposed_file); for `rejected`, None."""
-
-    proposal_id: str
-    status: str
-    notes: str
-    final_file: str | None = None
-
-    def to_dict(self) -> dict[str, object]:
-        return dataclasses.asdict(self)
-
-    @classmethod
-    def from_dict(cls, raw: dict[str, object]) -> "Response":
-        status = _require_str(raw, "status")
-        if status not in STATUSES:
-            raise ValueError(
-                f"response status must be one of {STATUSES}; got {status!r}"
-            )
-        final = raw.get("final_file")
-        if final is not None and not isinstance(final, str):
-            raise ValueError(
-                f"final_file must be a string or null; got {type(final).__name__}"
-            )
-        return cls(
-            proposal_id=_require_str(raw, "proposal_id"),
-            status=status,
-            notes=_require_str(raw, "notes"),
-            final_file=final,
-        )
-
-
-@dataclass(frozen=True)
-class AuditEntry:
-    """One row of the per-bottle audit log. JSON-Lines, append-only."""
-
-    timestamp: str
-    bottle_slug: str
-    component: str
-    operator_action: str
-    operator_notes: str
-    justification: str
-    diff: str
-
-    def to_dict(self) -> dict[str, object]:
-        return dataclasses.asdict(self)
 
 
 # --- Queue I/O -------------------------------------------------------------
 
 
-def _proposal_filename(proposal_id: str) -> str:
+def write_proposal(proposal: Proposal) -> Path:
-    return f"{proposal_id}.proposal.json"
+    """Persist `proposal` in the queue database, mode 0o600.
-
-
-def _response_filename(proposal_id: str) -> str:
-    return f"{proposal_id}.response.json"
-
-
-def _id_from_proposal_filename(path: Path) -> str | None:
-    name = path.name
-    if not name.endswith(".proposal.json"):
-        return None
-    return name[: -len(".proposal.json")]
-
-
-def write_proposal(queue_dir: Path, proposal: Proposal) -> Path:
-    """Persist `proposal` as JSON in the queue dir, mode 0o600.
     Directory is created if missing."""
-    queue_dir.mkdir(parents=True, exist_ok=True)
+    return QueueStore(proposal.bottle_slug).write_proposal(proposal)
-    path = queue_dir / _proposal_filename(proposal.id)
-    payload = json.dumps(proposal.to_dict(), indent=2) + "\n"
-    _atomic_write(path, payload, mode=0o600)
-    return path
 
 
-def read_proposal(queue_dir: Path, proposal_id: str) -> Proposal:
+def read_proposal(bottle_slug: str, proposal_id: str) -> Proposal:
-    path = queue_dir / _proposal_filename(proposal_id)
+    return QueueStore(bottle_slug).read_proposal(proposal_id)
-    with path.open() as f:
-        raw = json.load(f)
-    if not isinstance(raw, dict):
-        raise ValueError(f"{path}: top-level must be an object")
-    return Proposal.from_dict(raw)
 
 
-def list_pending_proposals(queue_dir: Path) -> list[Proposal]:
+def list_pending_proposals(bottle_slug: str) -> list[Proposal]:
-    """All proposals in `queue_dir` that do not yet have a matching
+    """All proposals for `bottle_slug` that do not yet have a matching
-    response file. Sorted by `arrival_timestamp` so the operator
+    response. Sorted by `arrival_timestamp` so the operator
     sees the queue FIFO."""
-    if not queue_dir.is_dir():
+    return QueueStore(bottle_slug).list_pending_proposals()
-        return []
-    out: list[Proposal] = []
-    for path in sorted(queue_dir.glob("*.proposal.json")):
-        proposal_id = _id_from_proposal_filename(path)
-        if proposal_id is None:
-            continue
-        if (queue_dir / _response_filename(proposal_id)).exists():
-            continue
-        try:
-            with path.open() as f:
-                raw = json.load(f)
-        except (OSError, json.JSONDecodeError):
-            continue
-        if not isinstance(raw, dict):
-            continue
-        try:
-            out.append(Proposal.from_dict(raw))
-        except (KeyError, ValueError):
-            continue
-    out.sort(key=lambda p: p.arrival_timestamp)
-    return out
 
 
-def write_response(queue_dir: Path, response: Response) -> Path:
+def list_all_pending_proposals() -> list[Proposal]:
-    queue_dir.mkdir(parents=True, exist_ok=True)
+    """All pending proposals across bottles, sorted FIFO."""
-    path = queue_dir / _response_filename(response.proposal_id)
+    return QueueStore("").list_all_pending_proposals()
-    payload = json.dumps(response.to_dict(), indent=2) + "\n"
-    _atomic_write(path, payload, mode=0o600)
-    return path
 
 
-def read_response(queue_dir: Path, proposal_id: str) -> Response:
+def write_response(bottle_slug: str, response: Response) -> Path:
-    path = queue_dir / _response_filename(proposal_id)
+    return QueueStore(bottle_slug).write_response(response)
-    with path.open() as f:
+
-        raw = json.load(f)
+
-    if not isinstance(raw, dict):
+def read_response(bottle_slug: str, proposal_id: str) -> Response:
-        raise ValueError(f"{path}: top-level must be an object")
+    return QueueStore(bottle_slug).read_response(proposal_id)
-    return Response.from_dict(raw)
 
 
 def wait_for_response(
-    queue_dir: Path,
+    bottle_slug: str,
     proposal_id: str,
     *,
     poll_interval: float = DEFAULT_POLL_INTERVAL_SEC,
@@ -317,90 +176,35 @@ def wait_for_response(
     which the wait raises TimeoutError. None waits forever — the
     natural shape, since the operator's response time is unbounded.
 
-    Polls the filesystem so the implementation stays portable and
+    Polls SQLite so the implementation stays portable and stdlib-only."""
-    stdlib-only."""
+    store = QueueStore(bottle_slug)
-    path = queue_dir / _response_filename(proposal_id)
     while True:
-        if path.exists():
+        try:
-            try:
+            return store.read_response(proposal_id)
-                with path.open() as f:
+        except FileNotFoundError:
-                    raw = json.load(f)
+            pass
-            except (OSError, json.JSONDecodeError):
-                raw = None
-            if isinstance(raw, dict):
-                try:
-                    return Response.from_dict(raw)
-                except (KeyError, ValueError):
-                    pass
         if deadline is not None and time.monotonic() >= deadline:
             raise TimeoutError(f"no response for proposal {proposal_id!r}")
         time.sleep(poll_interval)
 
 
-def archive_proposal(queue_dir: Path, proposal_id: str) -> None:
+def archive_proposal(bottle_slug: str, proposal_id: str) -> None:
-    """Move both proposal and response files to `<queue_dir>/processed/`.
+    """Mark both proposal and response rows processed.
-    Idempotent — missing files are silently skipped."""
+    Idempotent — missing rows are silently skipped."""
-    processed = queue_dir / "processed"
+    QueueStore(bottle_slug).archive_proposal(proposal_id)
-    processed.mkdir(parents=True, exist_ok=True)
-    for name in (_proposal_filename(proposal_id), _response_filename(proposal_id)):
-        src = queue_dir / name
-        if src.exists():
-            src.rename(processed / name)
 
 
 # --- Audit log -------------------------------------------------------------
 
 
 def write_audit_entry(entry: AuditEntry) -> Path:
-    """Append `entry` as one JSON-Lines record to the per-bottle
+    """Append `entry` to the host supervise audit table."""
-    audit log. Acquires an advisory exclusive lock so concurrent
+    return AuditStore().write_audit_entry(entry)
-    writers don't interleave bytes."""
-    path = audit_log_path(entry.component, entry.bottle_slug)
-    path.parent.mkdir(parents=True, exist_ok=True)
-    line = json.dumps(entry.to_dict(), sort_keys=False) + "\n"
-    fd = os.open(path, os.O_WRONLY | os.O_APPEND | os.O_CREAT, 0o600)
-    try:
-        _try_flock(fd)
-        try:
-            os.write(fd, line.encode("utf-8"))
-        finally:
-            _try_funlock(fd)
-    finally:
-        os.close(fd)
-    return path
 
 
 def read_audit_entries(component: str, slug: str) -> list[AuditEntry]:
-    """Load all audit entries for the given component+slug. Empty
+    """Load all audit entries for the given component+slug."""
-    list if the log doesn't exist."""
+    return AuditStore().read_audit_entries(component, slug)
-    path = audit_log_path(component, slug)
-    if not path.is_file():
-        return []
-    out: list[AuditEntry] = []
-    with path.open() as f:
-        for raw_line in f:
-            raw_line = raw_line.strip()
-            if not raw_line:
-                continue
-            try:
-                raw = json.loads(raw_line)
-            except json.JSONDecodeError:
-                continue
-            if not isinstance(raw, dict):
-                continue
-            try:
-                out.append(AuditEntry(
-                    timestamp=_require_str(raw, "timestamp"),
-                    bottle_slug=_require_str(raw, "bottle_slug"),
-                    component=_require_str(raw, "component"),
-                    operator_action=_require_str(raw, "operator_action"),
-                    operator_notes=_require_str(raw, "operator_notes"),
-                    justification=_require_str(raw, "justification"),
-                    diff=_require_str(raw, "diff"),
-                ))
-            except ValueError:
-                continue
-    return out
 
 
 # --- Diff rendering --------------------------------------------------------
@@ -433,89 +237,47 @@ def sha256_hex(content: str) -> str:
 class SupervisePlan:
     """Output of Supervise.prepare; consumed by .start.
 
-    `queue_dir` is the host directory bind-mounted into the sidecar
+    `db_path` is the host database bind-mounted into the sidecar at
-    at /run/supervise/queue. `internal_network` is empty at prepare
+    /run/supervise/bot-bottle.db. `internal_network` is empty at
-    time; the backend's launch step fills it via dataclasses.replace
+    prepare time; the backend's launch step fills it via
-    before calling .start."""
+    dataclasses.replace before calling .start."""
 
     slug: str
-    queue_dir: Path
+    db_path: Path
     internal_network: str = ""
 
 
 class Supervise(ABC):
-    """Per-bottle supervise sidecar. Encapsulates the host-side
+    """Per-bottle supervise sidecar. Encapsulates host-side database
-    prepare (queue dir staging); the sidecar's start/stop lifecycle
+    staging; the sidecar's start/stop lifecycle is backend-specific."""
-    is backend-specific."""
 
     def prepare(
         self,
         slug: str,
         stage_dir: Path,
     ) -> SupervisePlan:
-        """Stage the per-bottle queue dir on the host. Returns the
+        """Stage the host database. Returns the plan; `internal_network`
-        plan; `internal_network` must be set by the launch step before
+        must be set by the launch step before .start runs."""
-        .start runs."""
         del stage_dir
-        queue_dir = queue_dir_for_slug(slug)
+        mgr = StoreManager.instance()
-        queue_dir.mkdir(parents=True, exist_ok=True)
+        mgr.migrate()
         return SupervisePlan(
             slug=slug,
-            queue_dir=queue_dir,
+            db_path=mgr.db_path,
         )
 
-# --- Helpers ---------------------------------------------------------------
-
-
-def _require_str(raw: dict[str, object], key: str) -> str:
-    value = raw.get(key)
-    if not isinstance(value, str):
-        raise ValueError(f"missing or non-string field {key!r}")
-    return value
-
-
-def _atomic_write(path: Path, content: str, *, mode: int) -> None:
-    """Atomic: write to a sibling tmp file, fsync, rename."""
-    tmp = path.with_suffix(path.suffix + ".tmp")
-    fd = os.open(tmp, os.O_WRONLY | os.O_CREAT | os.O_TRUNC, mode)
-    try:
-        os.write(fd, content.encode("utf-8"))
-        os.fsync(fd)
-    finally:
-        os.close(fd)
-    os.replace(tmp, path)
-
-
-try:
-    import fcntl as _fcntl
-
-    def _try_flock(fd: int) -> None:  # type: ignore[reportRedeclaration]
-        try:
-            _fcntl.flock(fd, _fcntl.LOCK_EX)
-        except OSError:
-            pass
-
-    def _try_funlock(fd: int) -> None:  # type: ignore[reportRedeclaration]
-        try:
-            _fcntl.flock(fd, _fcntl.LOCK_UN)
-        except OSError:
-            pass
-except ImportError:  # pragma: no cover — Windows path
-    def _try_flock(fd: int) -> None:  # noqa: F841 — Windows fallback
-        return None
-
-    def _try_funlock(fd: int) -> None:  # noqa: F841 — Windows fallback
-        return None
-
 
 __all__ = [
     "ACTION_OPERATOR_EDIT",
     "AuditEntry",
+    "AuditStore",
     "COMPONENT_FOR_TOOL",
     "DEFAULT_POLL_INTERVAL_SEC",
+    "DB_PATH_IN_CONTAINER",
     "Proposal",
-    "QUEUE_DIR_IN_CONTAINER",
+    "QueueStore",
     "Response",
+    "StoreManager",
     "STATUSES",
     "STATUS_APPROVED",
     "STATUS_MODIFIED",
@@ -536,8 +298,9 @@ __all__ = [
     "audit_dir",
     "audit_log_path",
     "bot_bottle_root",
+    "host_db_path",
     "list_pending_proposals",
-    "queue_dir_for_slug",
+    "list_all_pending_proposals",
     "read_audit_entries",
     "read_proposal",
     "read_response",

bot_bottle/supervise_server.py

@@ -7,14 +7,13 @@ config changes when stuck. The tools are `egress-allow`,
 Each queued tool call:
 
   1. Validates the proposed file syntactically.
-  2. Writes a Proposal to /run/supervise/queue/ (bind-mounted from
+  2. Writes a Proposal to the host SQLite database.
-     the host's ~/.bot-bottle/queue/<slug>/).
+  3. Blocks polling for a matching Response row.
-  3. Blocks polling for a matching Response file.
   4. Returns the operator's `{status, notes}` to the agent.
 
 The bottle slug arrives via SUPERVISE_BOTTLE_SLUG env (stamped at
-container creation by the backend's start step). The queue dir comes
+container creation by the backend's start step). SUPERVISE_DB_PATH
-from SUPERVISE_QUEUE_DIR (default `/run/supervise/queue`).
+points at the bind-mounted host database.
 
 Speaks MCP over HTTP+JSON-RPC. Methods handled:
 
@@ -42,7 +41,6 @@ import typing
 import urllib.error
 import urllib.request
 from dataclasses import dataclass
-from pathlib import Path
 
 try:
     # Same-directory imports inside the bundle container; these files are
@@ -277,7 +275,6 @@ def validate_proposed_file(tool: str, content: str) -> None:
 @dataclass(frozen=True)
 class ServerConfig:
     bottle_slug: str
-    queue_dir: Path
     response_timeout_seconds: float = DEFAULT_RESPONSE_TIMEOUT_SECONDS
 
 
@@ -376,7 +373,7 @@ def handle_tools_call(
         current_file_hash=_sv.sha256_hex(proposed_file),
     )
     try:
-        _sv.write_proposal(config.queue_dir, proposal)
+        _sv.write_proposal(proposal)
     except OSError as e:
         raise _RpcInternalError(f"failed to write proposal to queue: {e}") from e
     sys.stderr.write(
@@ -387,7 +384,7 @@ def handle_tools_call(
     deadline = time.monotonic() + config.response_timeout_seconds
     try:
         response = _sv.wait_for_response(
-            config.queue_dir,
+            config.bottle_slug,
             proposal.id,
             poll_interval=MIN_RESPONSE_POLL_INTERVAL_SECONDS,
             deadline=deadline,
@@ -399,7 +396,7 @@ def handle_tools_call(
             "isError": False,
         }
     try:
-        _sv.archive_proposal(config.queue_dir, proposal.id)
+        _sv.archive_proposal(config.bottle_slug, proposal.id)
     except OSError as e:
         raise _RpcInternalError(f"failed to archive proposal: {e}") from e
 
@@ -539,7 +536,7 @@ class MCPHandler(http.server.BaseHTTPRequestHandler):
 class MCPServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
     allow_reuse_address = True
     daemon_threads = True
-    config: ServerConfig = ServerConfig(bottle_slug="", queue_dir=Path())
+    config: ServerConfig = ServerConfig(bottle_slug="")
 
 
 # --- Entry point -----------------------------------------------------------
@@ -548,21 +545,18 @@ class MCPServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
 def serve(
     *,
     bottle_slug: str,
-    queue_dir: Path,
     port: int = _sv.SUPERVISE_PORT,
     bind: str = "0.0.0.0",
     response_timeout_seconds: float = DEFAULT_RESPONSE_TIMEOUT_SECONDS,
 ) -> typing.NoReturn:
-    queue_dir.mkdir(parents=True, exist_ok=True)
     server = MCPServer((bind, port), MCPHandler)
     server.config = ServerConfig(
         bottle_slug=bottle_slug,
-        queue_dir=queue_dir,
         response_timeout_seconds=response_timeout_seconds,
     )
     sys.stderr.write(
         f"supervise listening on {bind}:{port}; "
-        f"slug={bottle_slug!r}; queue={queue_dir}; "
+        f"slug={bottle_slug!r}; "
         f"tools: {', '.join(t['name'] for t in TOOL_DEFINITIONS)}\n"  # type: ignore[arg-type]
     )
     sys.stderr.flush()
@@ -581,7 +575,6 @@ def main(argv: list[str]) -> int:
     if not bottle_slug:
         sys.stderr.write("supervise: SUPERVISE_BOTTLE_SLUG env is unset\n")
         return 2
-    queue_dir = Path(os.environ.get("SUPERVISE_QUEUE_DIR", _sv.QUEUE_DIR_IN_CONTAINER))
     port = int(os.environ.get("SUPERVISE_PORT", str(_sv.SUPERVISE_PORT)))
     bind = os.environ.get("SUPERVISE_BIND", "0.0.0.0")
     try:
@@ -591,7 +584,6 @@ def main(argv: list[str]) -> int:
         return 2
     serve(
         bottle_slug=bottle_slug,
-        queue_dir=queue_dir,
         port=port,
         bind=bind,
         response_timeout_seconds=response_timeout_seconds,

bot_bottle/supervise_types.py

@@ -0,0 +1,189 @@
+"""Shared types and path helpers for supervise stores (PRD 0013).
+
+Extracted from supervise.py so queue_store and audit_store can import
+Proposal, Response, AuditEntry, and host_db_path without creating a
+circular import (supervise imports from queue_store/audit_store and
+vice-versa).
+
+Patching bot_bottle_root on this module propagates through host_db_path
+because host_db_path looks up bot_bottle_root via sys.modules[__name__]
+at call time rather than capturing it at import time.
+"""
+
+from __future__ import annotations
+
+import dataclasses
+import sys
+import uuid
+from dataclasses import dataclass
+from datetime import datetime, timezone
+from pathlib import Path
+
+
+HOST_DB_FILENAME = "bot-bottle.db"
+
+TOOL_EGRESS_BLOCK = "egress-block"
+TOOL_EGRESS_ALLOW = "egress-allow"
+TOOL_GITLEAKS_ALLOW = "gitleaks-allow"
+TOOL_EGRESS_TOKEN_ALLOW = "egress-token-allow"
+TOOL_LIST_EGRESS_ROUTES = "list-egress-routes"
+TOOLS: tuple[str, ...] = (
+    TOOL_EGRESS_ALLOW,
+    TOOL_EGRESS_BLOCK,
+    TOOL_GITLEAKS_ALLOW,
+    TOOL_EGRESS_TOKEN_ALLOW,
+    TOOL_LIST_EGRESS_ROUTES,
+)
+
+STATUS_APPROVED = "approved"
+STATUS_MODIFIED = "modified"
+STATUS_REJECTED = "rejected"
+STATUSES: tuple[str, ...] = (STATUS_APPROVED, STATUS_MODIFIED, STATUS_REJECTED)
+
+ACTION_OPERATOR_EDIT = "operator-edit"
+
+
+def bot_bottle_root() -> Path:
+    return Path.home() / ".bot-bottle"
+
+
+def host_db_path() -> Path:
+    # Look up bot_bottle_root through this module's live namespace so that
+    # monkey-patches on supervise_types.bot_bottle_root take effect.
+    #
+    # Lives in its own "db" subdirectory, not directly under
+    # bot_bottle_root(), so backends that can only bind-mount
+    # directories (macos_container's `container run --mount`, which
+    # rejects file sources with "is not a directory") can share this
+    # one file with a sidecar without also exposing bot_bottle_root()'s
+    # other contents (git-gate keys, per-bottle state, etc.).
+    return sys.modules[__name__].bot_bottle_root() / "db" / HOST_DB_FILENAME
+
+
+def _require_str(raw: dict[str, object], key: str) -> str:
+    value = raw.get(key)
+    if not isinstance(value, str):
+        raise ValueError(f"missing or non-string field {key!r}")
+    return value
+
+
+@dataclass(frozen=True)
+class Proposal:
+    """One pending tool-call from the agent."""
+
+    id: str
+    bottle_slug: str
+    tool: str
+    proposed_file: str
+    justification: str
+    arrival_timestamp: str
+    current_file_hash: str
+
+    @classmethod
+    def new(
+        cls,
+        *,
+        bottle_slug: str,
+        tool: str,
+        proposed_file: str,
+        justification: str,
+        current_file_hash: str,
+        now: datetime | None = None,
+    ) -> "Proposal":
+        ts = (now or datetime.now(timezone.utc)).isoformat()
+        return cls(
+            id=str(uuid.uuid4()),
+            bottle_slug=bottle_slug,
+            tool=tool,
+            proposed_file=proposed_file,
+            justification=justification,
+            arrival_timestamp=ts,
+            current_file_hash=current_file_hash,
+        )
+
+    def to_dict(self) -> dict[str, object]:
+        return dataclasses.asdict(self)
+
+    @classmethod
+    def from_dict(cls, raw: dict[str, object]) -> "Proposal":
+        tool = _require_str(raw, "tool")
+        if tool not in TOOLS:
+            raise ValueError(f"tool must be one of {TOOLS}; got {tool!r}")
+        return cls(
+            id=_require_str(raw, "id"),
+            bottle_slug=_require_str(raw, "bottle_slug"),
+            tool=tool,
+            proposed_file=_require_str(raw, "proposed_file"),
+            justification=_require_str(raw, "justification"),
+            arrival_timestamp=_require_str(raw, "arrival_timestamp"),
+            current_file_hash=_require_str(raw, "current_file_hash"),
+        )
+
+
+@dataclass(frozen=True)
+class Response:
+    """The operator's decision on a proposal."""
+
+    proposal_id: str
+    status: str
+    notes: str
+    final_file: str | None = None
+
+    def to_dict(self) -> dict[str, object]:
+        return dataclasses.asdict(self)
+
+    @classmethod
+    def from_dict(cls, raw: dict[str, object]) -> "Response":
+        status = _require_str(raw, "status")
+        if status not in STATUSES:
+            raise ValueError(
+                f"response status must be one of {STATUSES}; got {status!r}"
+            )
+        final = raw.get("final_file")
+        if final is not None and not isinstance(final, str):
+            raise ValueError(
+                f"final_file must be a string or null; got {type(final).__name__}"
+            )
+        return cls(
+            proposal_id=_require_str(raw, "proposal_id"),
+            status=status,
+            notes=_require_str(raw, "notes"),
+            final_file=final,
+        )
+
+
+@dataclass(frozen=True)
+class AuditEntry:
+    """One row of the per-bottle audit log."""
+
+    timestamp: str
+    bottle_slug: str
+    component: str
+    operator_action: str
+    operator_notes: str
+    justification: str
+    diff: str
+
+    def to_dict(self) -> dict[str, object]:
+        return dataclasses.asdict(self)
+
+
+__all__ = [
+    "ACTION_OPERATOR_EDIT",
+    "AuditEntry",
+    "HOST_DB_FILENAME",
+    "Proposal",
+    "Response",
+    "STATUSES",
+    "STATUS_APPROVED",
+    "STATUS_MODIFIED",
+    "STATUS_REJECTED",
+    "TOOLS",
+    "TOOL_EGRESS_ALLOW",
+    "TOOL_EGRESS_BLOCK",
+    "TOOL_EGRESS_TOKEN_ALLOW",
+    "TOOL_GITLEAKS_ALLOW",
+    "TOOL_LIST_EGRESS_ROUTES",
+    "bot_bottle_root",
+    "host_db_path",
+]

bot_bottle/yaml_subset.py

@@ -21,6 +21,11 @@ Public API:
         For a Markdown file with YAML frontmatter delimited by `---`
         lines. Returns (frontmatter_dict, body_text).
 
+    serialize_yaml_subset(data) -> str
+        Serialize a dict (as produced by parse_yaml_subset) back to
+        block-style YAML text.  The result ends with a newline and
+        can be parsed back by parse_yaml_subset.
+
 What we accept (block-style):
 
     key: value                # mapping entry, value is inline
@@ -576,3 +581,105 @@ def parse_frontmatter(text: str) -> tuple[dict[str, object], str]:
     fm = parse_yaml_subset(fm_text)
     body = text[body_start:]
     return fm, body
+
+
+# --- Serializer -------------------------------------------------------------
+
+
+def _needs_quoting(s: str) -> bool:
+    """True when the string must be single-quoted to survive a round-trip."""
+    if not s:
+        return True
+    if s in ("true", "false", "null", "~") or s in _RESERVED_BOOL_LIKE:
+        return True
+    if (
+        _INT_RX.match(s)
+        or _DATE_RX.match(s)
+        or _OCTAL_RX.match(s)
+        or _HEX_RX.match(s)
+        or _FLOAT_RX.match(s)
+    ):
+        return True
+    # Characters that have special meaning at the start of a YAML value
+    if s[0] in ('"', "'", "[", "{", "!", "&", "*", "#", "|", ">", "%", "@", "`"):
+        return True
+    return False
+
+
+def _yaml_scalar(v: object) -> str:
+    """Serialize a scalar Python value to its YAML text form."""
+    if v is None:
+        return "null"
+    if isinstance(v, bool):
+        return "true" if v else "false"
+    if isinstance(v, int):
+        return str(v)
+    s = str(v)
+    if _needs_quoting(s):
+        return "'" + s.replace("'", "''") + "'"
+    return s
+
+
+def _serialize_node(node: object, indent: int) -> list[str]:
+    """Return lines (without trailing newlines) for `node` at `indent`.
+
+    Called only for non-empty dicts and lists (the caller guards with
+    `isinstance(val, (dict, list)) and val`), plus scalars at the leaf."""
+    prefix = " " * indent
+    if isinstance(node, dict):
+        out: list[str] = []
+        for key, val in node.items():
+            if isinstance(val, (dict, list)) and val:
+                out.append(f"{prefix}{key}:")
+                out.extend(_serialize_node(val, indent + 2))
+            else:
+                scalar = (
+                    "{}" if isinstance(val, dict)
+                    else "[]" if isinstance(val, list)
+                    else _yaml_scalar(val)
+                )
+                out.append(f"{prefix}{key}: {scalar}")
+        return out
+    if isinstance(node, list):
+        out = []
+        for item in node:
+            if isinstance(item, dict) and item:
+                entries = list(item.items())
+                first_key, first_val = entries[0]
+                if isinstance(first_val, (dict, list)) and first_val:
+                    out.append(f"{prefix}- {first_key}:")
+                    out.extend(_serialize_node(first_val, indent + 4))
+                else:
+                    scalar = (
+                        "{}" if isinstance(first_val, dict)
+                        else "[]" if isinstance(first_val, list)
+                        else _yaml_scalar(first_val)
+                    )
+                    out.append(f"{prefix}- {first_key}: {scalar}")
+                cont = prefix + "  "
+                for key, val in entries[1:]:
+                    if isinstance(val, (dict, list)) and val:
+                        out.append(f"{cont}{key}:")
+                        out.extend(_serialize_node(val, indent + 4))
+                    else:
+                        scalar = (
+                            "{}" if isinstance(val, dict)
+                            else "[]" if isinstance(val, list)
+                            else _yaml_scalar(val)
+                        )
+                        out.append(f"{cont}{key}: {scalar}")
+            else:
+                out.append(f"{prefix}- {_yaml_scalar(item)}")
+        return out
+    return [_yaml_scalar(node)]  # pragma: no cover
+
+
+def serialize_yaml_subset(data: dict[str, object]) -> str:
+    """Serialize `data` (as produced by parse_yaml_subset) to YAML text.
+
+    Produces block-style output with 2-space indentation. The result ends
+    with a newline and can be parsed back by parse_yaml_subset. Keys are
+    emitted in iteration order (insertion order in Python 3.7+)."""
+    if not data:
+        return ""
+    return "\n".join(_serialize_node(data, 0)) + "\n"

docs/prds/0067-sqlite-local-storage.md

@@ -0,0 +1,135 @@
+# PRD 0067: SQLite local storage
+
+- **Status:** Active
+- **Author:** codex
+- **Created:** 2026-07-01
+- **Issue:** #319
+
+## Summary
+
+Add a small stdlib SQLite storage layer for bot-bottle host runtime state,
+starting with the supervise queue and audit log. This replaces scattered JSON
+queue files and JSONL audit logs with structured tables while preserving the
+existing public supervise helper functions and sidecar queue mount contract.
+
+## Problem
+
+Bot-bottle currently stores supervise proposals and responses as individual JSON
+files under `~/.bot-bottle/queue/<slug>/`, and audit entries as JSONL files
+under `~/.bot-bottle/audit/`. That worked for the original interactive TUI, but
+new forge-native orchestration needs durable, queryable local state for queues,
+audit trails, watchdogs, and lifecycle records. PR #318 started introducing
+SQLite-shaped boilerplate for forge state; the storage foundation should live in
+its own PR so forge work can build on the shared runtime store instead of adding
+one-off persistence.
+
+## Goals / Success Criteria
+
+1. Supervise proposals and responses are persisted through SQLite.
+2. Audit entries are persisted through SQLite.
+3. Supervise queue helpers use the bottle slug / queue key instead of a queue
+   directory path.
+4. The sidecar receives the host database mount across docker, smolmachines,
+   and macOS-container backends.
+5. The implementation stays stdlib-only.
+6. Schema migrations use a `PRAGMA user_version` runner — no third-party deps.
+7. Unit tests cover queue round-trips, pending discovery, response waits,
+   archive semantics, audit round-trips, and path creation.
+
+## Non-goals
+
+- Migrating old JSON queue files or JSONL audit logs.
+- Adding forge orchestration state tables.
+- Adding egress metering or budget tables.
+- Changing the supervise TUI workflow or remediation behavior.
+- Introducing a third-party ORM or migration library.
+
+## Design
+
+### Database locations
+
+Queue and audit state use the host-level local database:
+
+```text
+~/.bot-bottle/bot-bottle.db
+```
+
+The supervise sidecar receives that database as a writable bind mount at
+`/run/supervise/bot-bottle.db` and gets the path through `SUPERVISE_DB_PATH`.
+No per-slug queue directory is mounted into the sidecar. This creates the shared
+host database that later forge/native lifecycle work can extend in separate
+PRDs.
+
+### Tables
+
+`supervise_proposals` lives in the host database:
+
+```sql
+CREATE TABLE supervise_proposals (
+    queue_key TEXT NOT NULL,
+    id TEXT NOT NULL,
+    bottle_slug TEXT NOT NULL,
+    tool TEXT NOT NULL,
+    proposed_file TEXT NOT NULL,
+    justification TEXT NOT NULL,
+    arrival_timestamp TEXT NOT NULL,
+    current_file_hash TEXT NOT NULL,
+    archived INTEGER NOT NULL DEFAULT 0,
+    PRIMARY KEY (queue_key, id)
+);
+```
+
+`supervise_responses` lives in the host database:
+
+```sql
+CREATE TABLE supervise_responses (
+    queue_key TEXT NOT NULL,
+    proposal_id TEXT NOT NULL,
+    status TEXT NOT NULL,
+    notes TEXT NOT NULL,
+    final_file TEXT,
+    archived INTEGER NOT NULL DEFAULT 0,
+    PRIMARY KEY (queue_key, proposal_id)
+);
+```
+
+`supervise_audit_entries` lives in the host database:
+
+```sql
+CREATE TABLE supervise_audit_entries (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    timestamp TEXT NOT NULL,
+    bottle_slug TEXT NOT NULL,
+    component TEXT NOT NULL,
+    operator_action TEXT NOT NULL,
+    operator_notes TEXT NOT NULL,
+    justification TEXT NOT NULL,
+    diff TEXT NOT NULL
+);
+```
+
+### Compatibility
+
+The queue helpers take a bottle slug / queue key and perform equivalent
+operations against `~/.bot-bottle/bot-bottle.db`:
+
+- `list_pending_proposals` returns non-archived proposals without a non-archived
+  response, sorted by arrival time.
+- `archive_proposal` marks matching proposal/response rows archived instead of
+  moving files into `processed/`.
+- `wait_for_response` keeps the current polling behavior but polls SQLite.
+
+The old audit path helpers (`audit_dir`, `audit_log_path`) stay available for
+compatibility. `audit_log_path` no longer describes the active storage location;
+callers should use `read_audit_entries`.
+
+## Implementation chunks
+
+1. Add SQLite store helpers for supervise queue and audit state.
+2. Rewire `bot_bottle.supervise` queue/audit functions to the store.
+3. Update supervise CLI discovery tests and queue/audit unit tests.
+4. Run unit tests, pyright, and pylint for touched modules.
+
+## Open questions
+
+None.

docs/prds/0068-smolmachines-linux.md

@@ -0,0 +1,227 @@
+# PRD 0068: smolmachines backend on Linux
+
+- **Status:** Active
+- **Author:** Claude
+- **Created:** 2026-06-25
+- **Issue:** #283
+
+## Summary
+
+Make the `smolmachines` backend (PRD 0023) runnable on Linux, not
+just macOS. `smolvm` already supports Linux via KVM (`/dev/kvm`);
+the gap is entirely in bot-bottle's host-side glue, which hard-codes
+macOS assumptions in three places:
+
+1. **Preflight** only checks that `smolvm` is on `PATH` — it never
+   checks the Linux KVM prerequisite, so a misconfigured host fails
+   deep in the launch flow with an opaque `smolvm` error.
+2. **The TSI allowlist enforcement** (`force_allowlist`) — the
+   security property that confines the agent VM to its sidecar
+   bundle's `/32` — **no-ops on Linux today, failing _open_**. The
+   smolvm state-DB path it patches is hard-coded to macOS's
+   `~/Library/Application Support/...`.
+3. **Per-bottle loopback scoping** (`allocate`) returns the shared
+   `127.0.0.1` on Linux, which would let the agent VM reach every
+   service on host loopback — a downgrade from the per-bottle alias
+   isolation macOS gets.
+
+This PRD closes all three so a bottle launched with
+`BOT_BOTTLE_BACKEND=smolmachines` on Linux gets the same isolation
+guarantee it gets on macOS, and documents the Linux/NixOS host
+setup. The primary validation target is NixOS, but the changes are
+distro-agnostic.
+
+## Problem
+
+The smolmachines backend runs each bottle's agent inside a libkrun
+microVM via `smolvm`, with egress confined by TSI's `--allow-cidr`
+allowlist set to a single `/32` — the sidecar bundle's loopback
+address. Everything else (host loopback, LAN, internet) is denied at
+the VMM layer. That security property is the entire reason the
+backend exists.
+
+libkrun runs on Hypervisor.framework (macOS) **and** KVM (Linux), and
+`smolvm` ships Linux x86_64 / aarch64 builds that require `/dev/kvm`.
+So the microVM layer already works on Linux. What does not work is
+bot-bottle's host integration, which PRD 0023 explicitly scoped to
+macOS-only for v1. Three concrete blockers:
+
+- **No KVM preflight.** On a Linux host without `/dev/kvm` (kernel
+  module not loaded) or without access to it (user not in the `kvm`
+  group), the failure surfaces as a cryptic `smolvm` non-zero exit
+  mid-launch instead of an actionable message.
+
+- **TSI enforcement fails open on Linux.** `force_allowlist`
+  early-returns on non-macOS. It exists because `smolvm` 0.8.0
+  silently drops `--allow-cidr` when combined with `--from`, so the
+  allowlist has to be patched into smolvm's persisted state DB before
+  `machine start`. On Linux that patch never runs **and** the DB path
+  is the macOS path, so the booted VM's TSI allowlist is whatever
+  smolvm defaulted to — potentially all of `127.0.0.0/8`. That is the
+  exact sandbox-escape the backend is supposed to prevent.
+
+- **No per-bottle loopback isolation on Linux.** `allocate` returns
+  `127.0.0.1` on Linux. Even with a correct allowlist, `127.0.0.1/32`
+  is shared by every service on host loopback, so the agent could
+  reach other bottles' published ports and host services. On macOS
+  this is solved with per-bottle `127.0.0.16..31` aliases added via
+  `sudo ifconfig lo0 alias`. On Linux the whole `127.0.0.0/8` is
+  already routed to `lo`, so docker can publish to `127.0.0.<N>`
+  with **no `ifconfig`/sudo step at all** — the isolation is actually
+  cheaper to achieve than on macOS.
+
+## Goals / Success Criteria
+
+- `BOT_BOTTLE_BACKEND=smolmachines ./cli.py start <agent>` launches,
+  runs, and tears down a bottle on a Linux host with `/dev/kvm`.
+- The TSI allowlist is enforced on Linux: PRD 0022's
+  `tests/integration/test_sandbox_escape.py` passes against
+  `BOT_BOTTLE_BACKEND=smolmachines` on Linux (the acceptance gate).
+- Each Linux bottle is scoped to its own `127.0.0.<N>/32`, matching
+  the macOS per-bottle isolation property.
+- A clear, actionable preflight error when `/dev/kvm` is missing or
+  inaccessible, with remediation (load `kvm-intel`/`kvm-amd`, join the
+  `kvm` group).
+- **Fail-closed:** if bot-bottle cannot positively confirm the TSI
+  allowlist was persisted for a machine (DB missing, row missing,
+  patch didn't take), it `die()`s before `machine start` rather than
+  booting a VM with an unverified allowlist.
+- macOS behavior is unchanged.
+- README documents Linux + NixOS host setup.
+
+## Non-goals
+
+- Rootless / non-KVM fallbacks (e.g. software emulation). Linux
+  smolmachines requires `/dev/kvm`, full stop.
+- Removing Docker as a host dependency — the sidecar bundle and
+  image-build pipeline still use Docker on Linux, same as macOS.
+- Auto-installing `smolvm` or configuring KVM on the operator's
+  behalf. Preflight reports; the operator remediates.
+- Nested-virtualization tuning for running the runner itself inside a
+  VM (documented as a caveat, not solved here).
+
+## Design
+
+### Platform detection
+
+Reuse the existing `platform.system()` check already in
+`loopback_alias.py` (`_is_macos()`). "Linux" is "not macOS" for every
+branch below; no new third-platform path.
+
+### Preflight: KVM gate (`util.smolmachines_preflight`)
+
+After the existing `smolvm`-on-`PATH` check, add a Linux-only gate:
+
+- `/dev/kvm` must exist → else `die()` with "enable KVM
+  (`kvm-intel`/`kvm-amd` kernel module)".
+- `/dev/kvm` must be readable + writable by the current user
+  (`os.access(..., R_OK | W_OK)`) → else `die()` with "add your user
+  to the `kvm` group (and re-login)".
+
+macOS is unaffected (Hypervisor.framework needs no device node).
+
+### smolvm state-DB path (platform-aware)
+
+`loopback_alias._SMOLVM_DB_PATH` becomes platform-derived:
+
+- macOS: `~/Library/Application Support/smolvm/server/smolvm.db`
+  (unchanged).
+- Linux: `$XDG_DATA_HOME/smolvm/server/smolvm.db`, defaulting to
+  `~/.local/share/smolvm/server/smolvm.db`.
+
+> **Verification note:** the Linux DB location is inferred from
+> smolvm's documented `~/.local/share` install layout and the XDG
+> base-dir spec. It must be confirmed on a real Linux smolvm install;
+> if smolvm uses a different path or schema, the fail-closed check
+> below turns that into a clear `die()` at launch rather than a silent
+> escape.
+
+### TSI enforcement: cross-platform + fail-closed (`force_allowlist`)
+
+Rework `force_allowlist(machine_name, allowed_cidrs)` to run on
+**both** platforms and to fail closed:
+
+1. Resolve the state DB; if the file is missing, `die()` (cannot
+   confirm enforcement → refuse to launch).
+2. Read the machine's persisted row; if the row is missing, `die()`.
+3. If the row's `allowed_cidrs` already equals the requested list
+   (e.g. a newer `smolvm` that honors `--allow-cidr` at create), do
+   nothing — no write.
+4. Otherwise patch `allowed_cidrs` (the existing BLOB-encoded write)
+   and re-read.
+5. If, after the patch, `allowed_cidrs` still does not equal the
+   requested list, `die()`.
+
+This is robust across smolvm versions: it works whether `--allow-cidr`
+is silently dropped (0.8.0) or honored (newer), and it never boots a
+VM whose persisted allowlist it could not confirm. It is a strict
+improvement on macOS too (today's code writes unconditionally and
+never verifies).
+
+> The persisted-row check confirms our write took, not that smolvm's
+> runtime TSI enforces it. The runtime guarantee is covered by the
+> sandbox-escape acceptance test; the persisted check is the cheap
+> fail-closed guard at launch.
+
+### Per-bottle loopback scoping on Linux (`allocate`)
+
+`allocate` runs the same docker-state-driven allocation on Linux as on
+macOS (`_allocate_locked`, the file lock, and `_aliases_in_use` via
+`docker inspect` are all already cross-platform). The only macOS-only
+step, `ensure_pool` (the `sudo ifconfig lo0 alias` dance), stays
+macOS-only: on Linux `127.0.0.0/8` is already loopback, so docker can
+publish bundle ports directly on `127.0.0.<N>` with no setup.
+
+Net effect: Linux bottles get per-bottle `127.0.0.16..31/32` scoping
+identical to macOS, without sudo.
+
+### Launch flow
+
+`launch.py` needs no structural change — `_allocate_resources` already
+calls `ensure_pool()` (now a Linux no-op) then `allocate()` (now
+per-bottle on Linux), and `_launch_vm` already calls
+`force_allowlist()` (now active on Linux). Only the macOS-specific
+docstrings are updated to describe the cross-platform behavior.
+
+## Implementation chunks
+
+1. **Preflight KVM gate** — `util.smolmachines_preflight` +
+   unit tests for the missing-device and no-access branches.
+2. **Platform-aware DB path + fail-closed `force_allowlist`** —
+   `loopback_alias.py`; update/extend `TestForceAllowlist`.
+3. **Cross-platform `allocate`** — drop the Linux early-return; update
+   `TestAllocate` / `TestAllocateLock` for the new Linux behavior.
+4. **Docstring + comment cleanup** in `launch.py` and module headers.
+5. **Docs** — README requirements + a Linux/NixOS host-setup section.
+
+## Testing Strategy
+
+- **Unit (CI, any OS):** the suite mocks `platform.system()` /
+  `subprocess` and patches `_SMOLVM_DB_PATH`, so the new Linux
+  branches are testable on the macOS/Linux CI runner without `smolvm`
+  or KVM. Covers: KVM preflight branches, fail-closed `force_allowlist`
+  (DB missing, row missing, patch-doesn't-take), per-bottle Linux
+  allocation + locking, platform-derived DB path.
+- **Integration (Linux host with KVM — the acceptance gate):**
+  `tests/integration/test_sandbox_escape.py` against
+  `BOT_BOTTLE_BACKEND=smolmachines`. This cannot run on the macOS dev
+  box and must be executed on NixOS before merge.
+
+## Open questions / verification pending
+
+- **Confirm the Linux smolvm state-DB path and schema** on a real
+  install (the `~/.local/share/...` inference above).
+- **Confirm whether the current smolvm Linux build still drops
+  `--allow-cidr` with `--from`** (the 0.8.0 bug). The fail-closed
+  design handles either answer, but knowing lets us drop the DB patch
+  if upstream fixed it.
+- **Confirm docker publishing to `127.0.0.<N>` on Linux** behaves as
+  expected end-to-end with TSI (high confidence; standard loopback
+  behavior, but unverified on the target host).
+
+## References
+
+- PRD 0023 — smolmachines bottle backend (macOS v1).
+- PRD 0022 — `test_sandbox_escape.py` acceptance gate.
+- PRD 0024 — sidecar bundle image.
+- smolvm: https://github.com/smol-machines/smolvm

docs/prds/prd-new-smolmachines-sidecar-vm.md

@@ -0,0 +1,115 @@
+# PRD prd-new: smolmachines sidecar VM
+
+- **Status:** Active
+- **Author:** codex
+- **Created:** 2026-07-09
+- **Issue:** #332
+
+## Summary
+
+Run the smolmachines backend's trusted sidecar bundle as its own smolVM instead
+of a Docker container. A bottle then consists of an agent VM plus a sidecar VM,
+with the agent VM's TSI allowlist limited to the per-bottle agent-facing
+sidecar surface.
+
+## Problem
+
+The smolmachines backend currently runs the agent in smolVM but keeps
+egress/git-gate/supervise in a Docker sidecar bundle. That hybrid launch path
+keeps Docker in the trusted runtime path and leaves smolmachines with a
+different isolation boundary than its agent VM design suggests.
+
+The existing Docker sidecar path also uses Docker port publishing to bind only
+agent-facing services to the per-bottle host address. TSI is IP-only, so the
+smolVM replacement must preserve that scoping: publishing sidecar services on
+generic host localhost would let the agent reach unrelated host services or
+other bottle sidecars if those services share the allowed address.
+
+## Goals / Success Criteria
+
+1. `BOT_BOTTLE_BACKEND=smolmachines ./cli.py start <agent>` runs with both the
+   agent and sidecar as smolVMs.
+2. The smolmachines launch path no longer uses `docker run` for the sidecar
+   bundle.
+3. Agent-facing egress, git-gate, and supervise endpoints are exposed only
+   through the bottle's own published sidecar surface.
+4. Internal sidecar-only ports are not reachable from the agent VM.
+5. The agent VM TSI allowlist remains fail-closed and limited to the per-bottle
+   address.
+6. Sidecar config, secrets, and state are delivered to the sidecar VM without
+   exposing provider or forge credentials to the agent VM.
+7. Teardown removes both VMs and any host-side published port state.
+
+## Non-goals
+
+- Rewriting the egress, git-gate, or supervise daemons.
+- Changing the Docker backend's sidecar bundle behavior.
+- Replacing the existing agent image build and pack pipeline except where shared
+  helper extraction is needed for sidecar image packing.
+- Weakening the current smolmachines TSI allowlist checks.
+
+## Design
+
+The sidecar VM continues to use the existing sidecar bundle image and
+`/app/sidecar_init.py` supervisor. The launch flow builds the sidecar image,
+packs it into a `.smolmachine` artifact, creates a per-bottle sidecar VM from
+that artifact, passes the same daemon-selection environment the Docker bundle
+uses today, mounts or copies the same daemon-private config/state inputs, starts
+the sidecar VM, wraps the sidecar VM's raw smolVM-published ports with a local
+per-bottle forwarder, then starts the agent VM with
+`--allow-cidr <per-bottle-address>/32`.
+
+smolVM currently exposes guest ports as `HOST:GUEST` port pairs bound on host
+loopback. It does not expose an address-scoped bind like
+`127.0.0.16:<port>:9099`. Because TSI is IP-only, bot-bottle must not advertise
+those raw loopback ports directly to the agent. Instead, bot-bottle runs one
+small stdlib Python TCP forwarder process per bottle:
+
+```text
+agent VM
+  -> TSI allows only <bottle-address>/32
+  -> bot-bottle forwarder bound to <bottle-address>:<random-port>
+  -> raw smolVM-published sidecar port on 127.0.0.1:<raw-port>
+  -> sidecar VM service
+```
+
+Agent-facing URLs are stamped from the forwarder ports, never the raw smolVM
+ports:
+
+- `HTTP_PROXY` / `HTTPS_PROXY` point at the published egress proxy port.
+- `GIT_GATE_URL` points at the published git HTTP port when git-gate is enabled.
+- `MCP_SUPERVISE_URL` points at the published supervise port when supervise is
+  enabled.
+
+Internal sidecar-only services stay bound inside the sidecar VM and are not
+published.
+
+### Forwarder constraints
+
+- Reject wildcard listener binds (`0.0.0.0`, `::`) and generic localhost
+  listener binds (`127.0.0.1`, `::1`) for agent-facing forwards.
+- Accept only fixed loopback targets selected by launch; the client cannot
+  choose or influence the forwarding target.
+- Forward bytes transparently without parsing HTTP, CONNECT, TLS, Git, or MCP.
+- Log lifecycle and endpoint metadata only; never log payload bytes.
+- Create forwards only for egress, git HTTP when enabled, and supervise when
+  enabled.
+- Fail closed if any listener cannot bind exactly the requested per-bottle
+  address.
+
+## Implementation chunks
+
+1. Extract the existing image-to-smolmachine pack helper so agent and sidecar
+   artifacts share the same cache and registry path.
+2. Add a strict stdlib host TCP forwarder for per-bottle address-bound
+   forwarding to raw smolVM-published sidecar ports.
+3. Add a sidecar VM launch spec and lifecycle helpers: pack, create, start,
+   publish/discover ports, stop, delete.
+4. Switch smolmachines launch from Docker sidecar bundle lifecycle to sidecar VM
+   plus forwarder lifecycle.
+5. Update egress apply / reload paths for the sidecar VM supervisor.
+6. Add unit tests for argv shape, URL stamping, teardown, and fail-closed
+   behavior.
+7. Add or update integration coverage for agent-to-sidecar reachability, host
+   localhost denial, other-bottle alias denial, internal port denial, and
+   teardown cleanup.

requirements-dev.txt

@@ -3,5 +3,5 @@
 # These tools are used for code quality checks in CI/CD.
 
 pylint>=3.0.0
-pyright>=1.1.300
+pyright>=1.1.411
 coverage>=7.0.0

tests/integration/test_sandbox_escape.py

@@ -81,10 +81,10 @@ class TestSandboxEscape(unittest.TestCase):
         # those are missing rather than die-ing inside backend.prepare.
         backend_name = os.environ.get("BOT_BOTTLE_BACKEND", "docker")
         if backend_name == "smolmachines":
-            if sys.platform != "darwin":
+            if sys.platform not in ("darwin", "linux"):
                 raise unittest.SkipTest(
-                    "BOT_BOTTLE_BACKEND=smolmachines is macOS-only in "
+                    f"BOT_BOTTLE_BACKEND=smolmachines is not supported "
-                    "v1 (libkrun TSI)"
+                    f"on {sys.platform} (macOS and Linux only)"
                 )
             if shutil.which("smolvm") is None:
                 raise unittest.SkipTest(

tests/integration/test_smolmachines_bundle_bringup.py

@@ -1,111 +0,0 @@
-"""Integration: PRD 0023 chunk 2c — bundle bringup on a per-bottle
-docker bridge with the pinned IP.
-
-End-to-end against the real docker daemon. Brings up just the
-sidecar bundle on its own bridge, confirms the container lands at
-the pinned IP, then tears down. Skipped under act_runner (docker
-socket mount topology breaks bridge visibility) and when the
-bundle image isn't available.
-
-Full launch flow (smolvm + bundle + provisioning + the
-localhost-reach / egress-port-bypass probes) lives in chunk 2d."""
-
-from __future__ import annotations
-
-import os
-import subprocess
-import time
-import unittest
-
-from bot_bottle.backend.smolmachines.sidecar_bundle import (
-    BundleLaunchSpec,
-    bundle_container_name,
-    bundle_network_name,
-    create_bundle_network,
-    remove_bundle_network,
-    start_bundle,
-    stop_bundle,
-)
-from tests._docker import skip_unless_docker
-
-
-@skip_unless_docker()
-@unittest.skipIf(
-    os.environ.get("GITEA_ACTIONS") == "true",
-    "skipped under act_runner: docker socket mount topology breaks "
-    "in-process visibility of networks created on the host daemon",
-)
-class TestBundleBringup(unittest.TestCase):
-    def setUp(self):
-        self.slug = f"cb-test-bundle-{os.getpid()}-{int(time.time())}"
-        self.network = bundle_network_name(self.slug)
-        self.container = bundle_container_name(self.slug)
-
-    def tearDown(self):
-        stop_bundle(self.slug)
-        remove_bundle_network(self.network)
-
-    def _bundle_image_built(self) -> bool:
-        """The bundle image (`bot-bottle-sidecars:latest`) is
-        built lazily by the docker backend's compose. If a
-        smolmachines-only operator hasn't run the docker backend
-        first, the image won't exist locally. Skip rather than
-        fail."""
-        r = subprocess.run(
-            ["docker", "image", "inspect", "bot-bottle-sidecars:latest"],
-            stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL,
-            check=False,
-        )
-        return r.returncode == 0
-
-    def test_create_network_then_start_bundle_pins_ip(self):
-        if not self._bundle_image_built():
-            self.skipTest(
-                "bot-bottle-sidecars:latest not built; run a docker "
-                "bottle first or `docker build -f Dockerfile.sidecars .`"
-            )
-
-        # Pick a subnet unlikely to collide on the host. Last
-        # octet of the slug hash isn't deterministic across runs;
-        # we hardcode a high octet (.211) that the docker default
-        # bridges almost never use.
-        subnet = "192.168.211.0/24"
-        gateway = "192.168.211.1"
-        bundle_ip = "192.168.211.2"
-
-        create_bundle_network(self.network, subnet, gateway)
-
-        spec = BundleLaunchSpec(
-            slug=self.slug,
-            network_name=self.network,
-            subnet=subnet,
-            gateway=gateway,
-            bundle_ip=bundle_ip,
-            # Empty daemons_csv → init exits "no daemons selected"
-            # immediately. We just need the container to land on
-            # the network at the right IP before it exits.
-            daemons_csv="",  # empty → init exits "no daemons selected"
-        )
-        start_bundle(spec)
-
-        # Inspect the container's IP on the per-bottle network.
-        r = subprocess.run(
-            ["docker", "inspect",
-             "--format",
-             "{{(index .NetworkSettings.Networks \"" + self.network + "\").IPAddress}}",
-             self.container],
-            capture_output=True, text=True, check=False,
-        )
-        # Container may have exited (no daemons selected → exit 0).
-        # The inspect still works on exited containers as long as
-        # `--rm` hasn't fired yet, which is a race. Even if it has,
-        # the launch succeeded — the container existed, on the
-        # right network, at the right IP. We don't fail here on
-        # missing inspect.
-        if r.returncode == 0 and r.stdout.strip():
-            self.assertEqual(bundle_ip, r.stdout.strip(),
-                             f"bundle landed at wrong IP: {r.stdout!r}")
-
-
-if __name__ == "__main__":
-    unittest.main()

tests/integration/test_smolmachines_launch.py

@@ -1,10 +1,9 @@
-"""Integration: PRD 0023 chunk 2d — end-to-end launch + exec
+"""Integration: end-to-end smolmachines launch + exec round trip.
-round trip + the acceptance probes.
 
-The smoke confirms the launch flow (per-bottle docker bridge →
+The smoke confirms the launch flow (sidecar bundle smolVM →
-sidecar bundle with host-loopback published ports → smolvm guest
+host-loopback forwarders → agent smolVM with TSI allowlist → exec)
-with TSI allowlist → exec) plumbs together end to end. The probes confirm the
+plumbs together end to end. The probes confirm the security
-security properties the design pivot was about:
+properties the design pivot was about:
 
   - **localhost-reach probe** — guest tries to dial a service
     bound on the host's `127.0.0.1`. TSI's per-bottle loopback
@@ -14,14 +13,7 @@ security properties the design pivot was about:
     the injected `HTTPS_PROXY`/`HTTP_PROXY` URL on the per-bottle
     loopback alias, while direct egress with proxy vars unset fails.
 
-  - **egress-port-bypass probe** — guest tries to dial
+Gated on macOS/Linux + smolvm + docker + not GITEA_ACTIONS — the
-    `<bundle-ip>:9099` (egress's port). TSI permits the IP but
-    the bundle's egress daemon binds `127.0.0.1` inside its
-    container, so the connect refuses at the socket level. The
-    bind-address mitigation is what closes TSI's port-granularity
-    gap.
-
-Gated on macOS + smolvm + docker + not GITEA_ACTIONS — the
 runner can't host libkrun-backed VMs."""
 
 from __future__ import annotations
@@ -65,8 +57,8 @@ def _minimal_manifest() -> ManifestIndex:
 
 @skip_unless_docker()
 @unittest.skipUnless(
-    platform.system() == "Darwin",
+    platform.system() in ("Darwin", "Linux"),
-    "smolvm is macOS-only for v1; Linux+KVM path is a future PRD",
+    "smolvm requires macOS or Linux",
 )
 @unittest.skipUnless(
     _smolvm_available(),
@@ -114,8 +106,8 @@ class TestSmolmachinesLaunch(unittest.TestCase):
 
     def test_localhost_reach_probe(self):
         # Agent dials a 127.0.0.1 service on the host. TSI's
-        # allowlist contains only <bundle-ip>/32, so this must
+        # allowlist contains only the per-bottle loopback alias, so
-        # refuse. We use a port unlikely to be bound on the host
+        # this must refuse. We use a port unlikely to be bound on the host
         # (high-numbered) so we're confirming TSI refusal, not
         # just "no service listening."
         r = self.bottle.exec(
@@ -141,7 +133,15 @@ class TestSmolmachinesLaunch(unittest.TestCase):
         proxies = [line.strip() for line in r.stdout.splitlines()]
         self.assertEqual(2, len(proxies), proxies)
         self.assertEqual(proxies[0], proxies[1], proxies)
-        self.assertTrue(proxies[0].startswith("http://127."), proxies[0])
+        # macOS: proxy binds to the per-bottle loopback alias (127.x.x.x) so
+        # TSI can intercept guest connections to it.  Linux: the guest kernel
+        # routes 127.0.0.0/8 to its own loopback (TSI never sees those), so
+        # the proxy instead binds to the per-bottle bridge gateway (192.168.x.1)
+        # which routes via eth0 and is intercepted by TSI normally.
+        self.assertRegex(
+            proxies[0], r"^http://\d+\.\d+\.\d+\.\d+:\d+$",
+            "expected proxy URL to be an http://IP:port address",
+        )
 
         r = self.bottle.exec(
             "curl -fsS --max-time 20 https://example.com >/dev/null && echo OK"
@@ -188,28 +188,6 @@ class TestSmolmachinesLaunch(unittest.TestCase):
         self.assertEqual(0, r.returncode, msg=r.stderr)
         self.assertEqual(_AGENT_PROMPT, r.stdout.rstrip("\n"))
 
-    def test_egress_port_bypass_probe(self):
-        # Agent dials <bundle-ip>:9099 (egress's port). TSI
-        # permits the IP, but egress will bind 127.0.0.1:9099
-        # inside the bundle in chunk 3, so the connect refuses
-        # at the socket level. NOTE: in chunk 2d the bundle's
-        # daemons aren't running (daemons_csv=""), so nothing
-        # is listening on :9099 anyway — this test asserts the
-        # connect fails, which is the property chunk 3 will
-        # preserve once egress is actually running.
-        r = self.bottle.exec(
-            "env -u HTTPS_PROXY -u HTTP_PROXY -u https_proxy -u http_proxy "
-            f"curl -s --show-error --max-time 3 http://{self.plan.bundle_ip}:9099 "
-            "2>&1 || true"
-        )
-        self.assertTrue(
-            "refused" in r.stdout.lower()
-            or "timed out" in r.stdout.lower()
-            or "unreachable" in r.stdout.lower()
-            or "failed" in r.stdout.lower(),
-            f"expected egress port refusal; got: {r.stdout!r}",
-        )
-
 
 if __name__ == "__main__":
     unittest.main()

tests/integration/test_smolmachines_smolvm_smoke.py

@@ -2,7 +2,7 @@
 exercised against the real binary.
 
 The full machine-lifecycle round trip (create → start → exec →
-delete) is gated behind macOS + Darwin platform check and lives
+delete) is gated behind macOS/Linux platform check and lives
 in chunk 2d's smoke. This file just verifies `is_available()`
 correctly reports presence and `_smolvm()` can run a no-op
 subcommand without errors — enough to flag wrapper drift if
@@ -23,8 +23,8 @@ from bot_bottle.backend.smolmachines.smolvm import is_available
     "skipped under act_runner: smolvm not installed on the runner",
 )
 @unittest.skipUnless(
-    platform.system() == "Darwin",
+    platform.system() in ("Darwin", "Linux"),
-    "smolvm is macOS-only for v1; Linux+KVM path is a future PRD",
+    "smolvm requires macOS or Linux",
 )
 @unittest.skipUnless(
     is_available(),

tests/unit/test_agent_provider.py

@@ -35,7 +35,10 @@ class TestAgentProviderRuntime(unittest.TestCase):
             )
             config = Path(tmp, "codex-config.toml").read_text()
         self.assertEqual("codex", plan.template)
-        self.assertEqual("codex", plan.command)
+        self.assertEqual(
+            "/home/node/.codex/packages/standalone/current/bin/codex",
+            plan.command,
+        )
         self.assertEqual("read_prompt_file", plan.prompt_mode)
         self.assertEqual("/tmp/Dockerfile.codex", plan.dockerfile)
         self.assertEqual(

tests/unit/test_cli_dispatch.py

@@ -12,11 +12,19 @@ from unittest.mock import patch
 
 import bot_bottle.cli as climod
 from bot_bottle.cli import main
+from bot_bottle.db_store import DbStore
 from bot_bottle.log import Die
 from bot_bottle.manifest import ManifestError
+from bot_bottle.store_manager import StoreManager
 
 
 class TestMainDispatch(unittest.TestCase):
+    def setUp(self) -> None:
+        patcher = patch.object(DbStore, "is_migrated", return_value=True)
+        self._mock_check = patcher.start()
+        self.addCleanup(patcher.stop)
+        self.addCleanup(StoreManager.reset)
+
     def test_no_args_prints_usage_returns_2(self) -> None:
         with patch("sys.stderr", io.StringIO()):
             self.assertEqual(2, main([]))
@@ -56,6 +64,15 @@ class TestMainDispatch(unittest.TestCase):
             main(["x", "a", "b"])
         self.assertEqual([["a", "b"]], seen)
 
+    def test_missing_env_var_error_maps_to_1(self) -> None:
+        from bot_bottle.errors import MissingEnvVarError
+
+        def boom(_rest: list[str]) -> int:
+            raise MissingEnvVarError("MY_VAR", "MY_VAR is not set")
+
+        with patch.dict(climod.COMMANDS, {"x": boom}), patch("sys.stderr", io.StringIO()):
+            self.assertEqual(1, main(["x"]))
+
     def test_manifest_error_maps_to_1(self) -> None:
         def boom(_rest: list[str]) -> int:
             raise ManifestError("bad manifest")

tests/unit/test_cli_start_headless.py

@@ -9,6 +9,7 @@ is created.
 
 from __future__ import annotations
 
+import io
 import os
 import unittest
 from unittest.mock import MagicMock, patch
@@ -184,5 +185,55 @@ class TestCmdStartHeadless(unittest.TestCase):
         self.assertEqual("docker", self._launch_mock.call_args[1]["backend_name"])
 
 
+class TestPrepareWithPreflight(unittest.TestCase):
+    """prepare_with_preflight calls render_preflight with the plan and backend name."""
+
+    def test_render_preflight_called(self):
+        from pathlib import Path
+        mock_backend = MagicMock()
+        mock_plan = MagicMock()
+        mock_backend.prepare.return_value = mock_plan
+        mock_backend.name = "test-backend"
+        render = MagicMock()
+
+        with patch("bot_bottle.cli.start.get_bottle_backend", return_value=mock_backend), \
+             patch("bot_bottle.cli.start._identity_from_plan", return_value="id"), \
+             patch("bot_bottle.cli.start.info"):
+            start_mod.prepare_with_preflight(
+                MagicMock(),
+                stage_dir=Path("/tmp"),
+                render_preflight=render,
+                prompt_yes=MagicMock(),
+                dry_run=True,
+            )
+
+        render.assert_called_once_with(mock_plan, "test-backend")
+
+
+class TestNoAgentsDefined(unittest.TestCase):
+    """cmd_start prints an error and returns 1 when the manifest has no agents."""
+
+    def test_no_agents_defined_returns_1(self):
+        manifest = _make_manifest([], [])
+        with patch(
+            "bot_bottle.cli.start.ManifestIndex.resolve", return_value=manifest
+        ), patch("sys.stderr", io.StringIO()) as err:
+            rc = start_mod.cmd_start([])
+        self.assertEqual(1, rc)
+        self.assertIn("no agents defined", err.getvalue())
+
+
+class TestTextRenderPreflight(unittest.TestCase):
+    """_text_render_preflight returns a renderer that prints the backend name."""
+
+    def test_backend_name_in_output(self):
+        render = start_mod._text_render_preflight()
+        plan = MagicMock()
+        with patch("bot_bottle.cli.start._manifest_to_yaml", return_value=""), \
+             patch("sys.stderr", io.StringIO()) as err:
+            render(plan, "my-backend")
+        self.assertIn("my-backend", err.getvalue())
+
+
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_compose.py

@@ -107,7 +107,7 @@ def _egress_plan(
 def _supervise_plan() -> SupervisePlan:
     return SupervisePlan(
         slug=SLUG,
-        queue_dir=STATE / "supervise" / "queue",
+        db_path=STATE / "bot-bottle.db",
         internal_network=f"bot-bottle-net-{SLUG}",
     )
 
@@ -392,7 +392,7 @@ class TestSidecarBundleShape(unittest.TestCase):
         sc = self._render(supervise=True)["services"]["sidecars"]
         env_strings = sc["environment"]
         self.assertIn(f"SUPERVISE_BOTTLE_SLUG={SLUG}", env_strings)
-        self.assertTrue(any(e.startswith("SUPERVISE_QUEUE_DIR=") for e in env_strings))
+        self.assertIn("SUPERVISE_DB_PATH=/run/supervise/bot-bottle.db", env_strings)
         self.assertTrue(any(e.startswith("SUPERVISE_PORT=") for e in env_strings))
 
     def test_volumes_always_includes_egress_ca(self):
@@ -408,8 +408,7 @@ class TestSidecarBundleShape(unittest.TestCase):
         self.assertIn("/etc/egress", targets)
         self.assertIn("/git-gate-entrypoint.sh", targets)
         self.assertIn("/git-gate/creds/upstream-known_hosts", targets)
-        self.assertTrue(any("supervise/queue" in t or t.startswith("/run/supervise")
+        self.assertIn("/run/supervise/bot-bottle.db", targets)
-                            for t in targets))
 
     def test_extra_hosts_omitted_for_git_upstreams(self):
         sc = self._render(with_git=True)["services"]["sidecars"]

tests/unit/test_contrib_claude_provider.py

@@ -74,7 +74,7 @@ def _plan(
     if supervise:
         supervise_plan = SupervisePlan(
             slug="demo-abc12",
-            queue_dir=Path("/tmp/queue"),
+            db_path=Path("/tmp/bot-bottle.db"),
         )
     return DockerBottlePlan(
         spec=spec,

tests/unit/test_contrib_codex_provider.py

@@ -77,7 +77,7 @@ def _plan(
     if supervise:
         supervise_plan = SupervisePlan(
             slug="demo-abc12",
-            queue_dir=Path("/tmp/queue"),
+            db_path=Path("/tmp/bot-bottle.db"),
         )
     return DockerBottlePlan(
         spec=spec,
@@ -261,6 +261,36 @@ class TestCodexProvision(unittest.TestCase):
         self.assertTrue(any("find" in s and "-delete" in s for s in scripts))
         self.assertTrue(any("runuser" in s and "codex login status" in s for s in scripts))
 
+    def test_forwarded_credentials_verify_sets_codex_path(self):
+        with tempfile.TemporaryDirectory(prefix="bb-codex-auth.") as tmp:
+            state_dir = Path(tmp)
+            prompt_file = state_dir / "prompt.txt"
+            prompt_file.write_text("")
+            with patch(
+                "bot_bottle.contrib.codex.agent_provider.codex_host_access_token",
+                return_value="token",
+            ), patch(
+                "bot_bottle.contrib.codex.agent_provider.write_codex_dummy_auth_file",
+            ):
+                provision = CodexAgentProvider().provision_plan(
+                    dockerfile="",
+                    state_dir=state_dir,
+                    instance_name="bot-bottle-demo-abc12",
+                    prompt_file=prompt_file,
+                    forward_host_credentials=True,
+                    host_env={},
+                )
+
+        verify_argv = provision.verify[0].argv
+        self.assertTrue(any(
+            item.startswith("PATH=/home/node/.local/bin:")
+            for item in verify_argv
+        ))
+        self.assertIn(
+            "/home/node/.codex/packages/standalone/current/bin/codex",
+            verify_argv,
+        )
+
     def test_dies_when_dir_creation_fails(self):
         provision = AgentProvisionPlan(
             template="codex", command="codex",
@@ -301,7 +331,8 @@ class TestCodexSuperviseMcp(unittest.TestCase):
         script = bottle.exec.call_args.args[0]
         self.assertEqual("node", bottle.exec.call_args.kwargs.get("user"))
         self.assertEqual(
-            f"codex mcp add supervise --url {_URL}",
+            "/home/node/.codex/packages/standalone/current/bin/codex "
+            f"mcp add supervise --url {_URL}",
             script,
         )
 

tests/unit/test_egress.py

@@ -19,7 +19,7 @@ from bot_bottle.egress import (
     egress_sidecar_env_entries,
     egress_token_env_map,
 )
-from bot_bottle.log import Die
+from bot_bottle.errors import MissingEnvVarError
 from bot_bottle.manifest import ManifestIndex
 from bot_bottle.yaml_subset import parse_yaml_subset
 
@@ -499,14 +499,14 @@ class TestResolveTokenValues(unittest.TestCase):
         self.assertEqual({"EGRESS_TOKEN_0": "the-value"}, out)
 
     def test_missing_token_ref_dies(self):
-        with self.assertRaises(Die):
+        with self.assertRaises(MissingEnvVarError):
             egress_resolve_token_values(
                 {"EGRESS_TOKEN_0": "GH_PAT"},
                 {},
             )
 
     def test_empty_token_ref_dies(self):
-        with self.assertRaises(Die):
+        with self.assertRaises(MissingEnvVarError):
             egress_resolve_token_values(
                 {"EGRESS_TOKEN_0": "GH_PAT"},
                 {"GH_PAT": ""},

tests/unit/test_egress_addon_log_redaction.py

@@ -47,7 +47,6 @@ def _addon() -> EgressAddon:
     a: EgressAddon = EgressAddon.__new__(EgressAddon)
     a.config = Config(routes=(), log=LOG_FULL)
     a.safe_tokens = set()
-    a._supervise_queue_dir = ""
     a._supervise_slug = ""
     a._token_allow_timeout = 300.0
     return a

tests/unit/test_egress_addon_request_flow.py

@@ -212,7 +212,6 @@ def _addon(config: Config) -> EgressAddon:
     a: EgressAddon = EgressAddon.__new__(EgressAddon)
     a.config = config
     a.safe_tokens = set()
-    a._supervise_queue_dir = ""
     a._supervise_slug = ""
     a._token_allow_timeout = 300.0
     a.routes_path = "/nonexistent/routes.yaml"
@@ -386,10 +385,10 @@ def _fake_sv(response_status: str | None) -> types.SimpleNamespace:
     def _sha256_hex(_payload: Any) -> str:
         return "hash"
 
-    def _noop(_a: Any, _b: Any) -> None:
+    def _noop(*_args: Any) -> None:
         return None
 
-    def _read_response(_qd: Any, _pid: Any) -> Any:
+    def _read_response(_slug: Any, _pid: Any) -> Any:
         if response_status is None:
             raise OSError("not written yet")  # forces poll -> timeout
         return types.SimpleNamespace(status=response_status)
@@ -409,7 +408,6 @@ def _fake_sv(response_status: str | None) -> types.SimpleNamespace:
 class TestSuperviseBranch(unittest.TestCase):
     def _supervised_addon(self) -> EgressAddon:
         addon = _addon(Config(routes=(Route(host="api.example.com"),)))
-        addon._supervise_queue_dir = "/tmp/egress-queue"
         addon._supervise_slug = "test-bottle"
         addon._token_allow_timeout = 0.05
         return addon
@@ -632,14 +630,13 @@ class TestRedactSurfaces(unittest.TestCase):
 class TestSuperviseWriteFailure(unittest.TestCase):
     def test_write_proposal_oserror_blocks(self) -> None:
         addon = _addon(Config(routes=(Route(host="api.example.com"),)))
-        addon._supervise_queue_dir = "/tmp/egress-queue"
         addon._supervise_slug = "test-bottle"
         addon._token_allow_timeout = 0.05
         flow = _Flow(_Request(host="api.example.com", method="POST", body=f"k={_OPENAI_KEY}"))
 
         fake = _fake_sv("approved")
 
-        def _raise(_qd: Any, _p: Any) -> None:
+        def _raise(_p: Any) -> None:
             raise OSError("disk full")
 
         fake.write_proposal = _raise

tests/unit/test_git_gate.py

@@ -14,10 +14,12 @@ from bot_bottle.git_gate import (
     git_gate_render_access_hook,
     git_gate_render_entrypoint,
     git_gate_render_hook,
+    provision_git_gate_dynamic_keys,
     revoke_git_gate_provisioned_keys,
     _resolve_identity_file,
     git_gate_upstreams_for_bottle,
 )
+from bot_bottle.errors import MissingEnvVarError
 from bot_bottle.manifest import ManifestIndex
 from tests.fixtures import fixture_minimal, fixture_with_git
 
@@ -209,12 +211,23 @@ class TestHookRender(unittest.TestCase):
         # the suppressed findings for human approval.
         self.assertIn("--ignore-gitleaks-allow", hook)
         self.assertIn("--report-format=json", hook)
-        self.assertIn('"tool": "gitleaks-allow"', hook)
+        self.assertIn("tool=_sv.TOOL_GITLEAKS_ALLOW", hook)
-        self.assertIn("SUPERVISE_QUEUE_DIR", hook)
+        self.assertIn("_sv.write_proposal", hook)
+        self.assertIn("_sv.read_response", hook)
         self.assertIn("SUPERVISE_BOTTLE_SLUG", hook)
         self.assertIn("supervisor approved # gitleaks:allow", hook)
         self.assertIn("supervisor rejected # gitleaks:allow", hook)
 
+    def test_inline_gitleaks_allow_python_imports_work_in_sidecar_layout(self):
+        hook = git_gate_render_hook()
+        # The sidecar image copies supervise.py flat under /app, while
+        # host-side tests import it through the bot_bottle package.
+        # Hooks execute from the bare repo directory, so the embedded
+        # Python must include /app and support both import layouts.
+        self.assertIn('PYTHONPATH="/app${PYTHONPATH:+:$PYTHONPATH}"', hook)
+        self.assertIn("import supervise as _sv", hook)
+        self.assertIn("from bot_bottle import supervise as _sv", hook)
+
     def test_inline_gitleaks_allow_fails_closed_without_supervisor(self):
         hook = git_gate_render_hook()
         self.assertIn(
@@ -371,6 +384,27 @@ class TestDynamicKeyProvisioning(unittest.TestCase):
             self.assertEqual("/tmp/provisioned-key", _resolve_identity_file(entry, "demo", self.stage))
         mock_provision.assert_called_once()
 
+    def test_prepare_defers_gitea_key_provisioning(self):
+        bottle = self._gitea_manifest().bottles["dev"]
+        with patch("bot_bottle.git_gate_provision._provision_dynamic_key") as mock_provision:
+            plan = _StubGate().prepare(bottle, "demo", self.stage)
+
+        mock_provision.assert_not_called()
+        self.assertEqual("", plan.upstreams[0].identity_file)
+
+    def test_launch_time_helper_provisions_gitea_keys(self):
+        bottle = self._gitea_manifest().bottles["dev"]
+        plan = _StubGate().prepare(bottle, "demo", self.stage)
+
+        with patch(
+            "bot_bottle.git_gate_provision._provision_dynamic_key",
+            return_value="/tmp/provisioned-key",
+        ) as mock_provision:
+            updated = provision_git_gate_dynamic_keys(bottle, plan, self.stage)
+
+        mock_provision.assert_called_once_with(bottle.git[0], "demo", self.stage)
+        self.assertEqual("/tmp/provisioned-key", updated.upstreams[0].identity_file)
+
     def test_revoke_skips_non_gitea_and_missing_id_file(self):
         revoke_git_gate_provisioned_keys(fixture_with_git().bottles["dev"], self.stage)
 
@@ -388,7 +422,7 @@ class TestDynamicKeyProvisioning(unittest.TestCase):
     def test_revoke_missing_token_raises(self):
         bottle = self._gitea_manifest().bottles["dev"]
         (self.stage / "repo-deploy-key-id").write_text("123\n")
-        with patch.dict("os.environ", {}, clear=True), self.assertRaises(RuntimeError) as cm:
+        with patch.dict("os.environ", {}, clear=True), self.assertRaises(MissingEnvVarError) as cm:
             revoke_git_gate_provisioned_keys(bottle, self.stage)
         self.assertIn("env var is not set", str(cm.exception))
 

tests/unit/test_git_gate_host_key.py

@@ -0,0 +1,698 @@
+"""Unit tests for git_gate_host_key (issue #333)."""
+
+from __future__ import annotations
+
+import tempfile
+import unittest
+from pathlib import Path
+from unittest.mock import MagicMock, patch
+
+from bot_bottle.git_gate_host_key import (
+    add_host_key_to_frontmatter,
+    find_and_update_bottle_file,
+    find_repo_bottle_file,
+    prompt_tty,
+    fetch_host_key,
+    preflight_host_keys,
+)
+from bot_bottle.manifest import Manifest, ManifestIndex
+
+
+# ---------------------------------------------------------------------------
+# fetch_host_key
+# ---------------------------------------------------------------------------
+
+
+class TestFetchHostKey(unittest.TestCase):
+    def _run_result(self, stdout: str, returncode: int = 0) -> MagicMock:
+        r = MagicMock()
+        r.stdout = stdout
+        r.stderr = ""
+        r.returncode = returncode
+        return r
+
+    def test_returns_type_and_key(self) -> None:
+        stdout = "gitea.example.com ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAA\n"
+        with patch("subprocess.run", return_value=self._run_result(stdout)):
+            key = fetch_host_key("gitea.example.com", "22")
+        self.assertEqual("ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAA", key)
+
+    def test_non_default_port_passes_p_flag(self) -> None:
+        stdout = "[gitea.example.com]:30009 ssh-ed25519 AAAA\n"
+        with patch("subprocess.run", return_value=self._run_result(stdout)) as mock_run:
+            fetch_host_key("gitea.example.com", "30009")
+        args = mock_run.call_args[0][0]
+        self.assertIn("-p", args)
+        self.assertIn("30009", args)
+
+    def test_default_port_omits_p_flag(self) -> None:
+        stdout = "github.com ssh-ed25519 AAAA\n"
+        with patch("subprocess.run", return_value=self._run_result(stdout)) as mock_run:
+            fetch_host_key("github.com", "22")
+        args = mock_run.call_args[0][0]
+        self.assertNotIn("-p", args)
+
+    def test_skips_comment_lines(self) -> None:
+        stdout = "# comment\ngithub.com ssh-ed25519 AAAA\n"
+        with patch("subprocess.run", return_value=self._run_result(stdout)):
+            key = fetch_host_key("github.com", "22")
+        self.assertEqual("ssh-ed25519 AAAA", key)
+
+    def test_skips_lines_without_three_parts(self) -> None:
+        # A line with only two whitespace-separated tokens is not a valid
+        # known_hosts entry; it should be skipped and the function should
+        # raise rather than return a partial result.
+        stdout = "malformed-line\ngithub.com ssh-ed25519 AAAA\n"
+        with patch("subprocess.run", return_value=self._run_result(stdout)):
+            key = fetch_host_key("github.com", "22")
+        self.assertEqual("ssh-ed25519 AAAA", key)
+
+    def test_raises_on_empty_output(self) -> None:
+        with patch("subprocess.run", return_value=self._run_result("")):
+            with self.assertRaises(RuntimeError) as cm:
+                fetch_host_key("example.com", "22")
+        self.assertIn("no host key", str(cm.exception))
+
+    def test_prefers_ed25519_over_ecdsa(self) -> None:
+        stdout = (
+            "gitea.example.com ecdsa-sha2-nistp256 BBBBB\n"
+            "gitea.example.com ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAA\n"
+        )
+        with patch("subprocess.run", return_value=self._run_result(stdout)):
+            key = fetch_host_key("gitea.example.com", "22")
+        self.assertEqual("ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAA", key)
+
+    def test_falls_back_to_ecdsa_without_ed25519(self) -> None:
+        stdout = "gitea.example.com ecdsa-sha2-nistp256 BBBBB\n"
+        with patch("subprocess.run", return_value=self._run_result(stdout)):
+            key = fetch_host_key("gitea.example.com", "22")
+        self.assertEqual("ecdsa-sha2-nistp256 BBBBB", key)
+
+    def test_falls_back_to_rsa_without_ed25519_or_ecdsa(self) -> None:
+        stdout = "gitea.example.com ssh-rsa AAAAB3NzaC1yc2EAAAA\n"
+        with patch("subprocess.run", return_value=self._run_result(stdout)):
+            key = fetch_host_key("gitea.example.com", "22")
+        self.assertEqual("ssh-rsa AAAAB3NzaC1yc2EAAAA", key)
+
+    def test_falls_back_to_first_for_unknown_type(self) -> None:
+        stdout = "gitea.example.com ssh-unknown CCCCC\n"
+        with patch("subprocess.run", return_value=self._run_result(stdout)):
+            key = fetch_host_key("gitea.example.com", "22")
+        self.assertEqual("ssh-unknown CCCCC", key)
+
+    def test_raises_includes_stderr_when_present(self) -> None:
+        r = self._run_result("")
+        r.stderr = "connection refused"
+        with patch("subprocess.run", return_value=r):
+            with self.assertRaises(RuntimeError) as cm:
+                fetch_host_key("example.com", "22")
+        self.assertIn("connection refused", str(cm.exception))
+
+    def test_raises_on_os_error(self) -> None:
+        with patch("subprocess.run", side_effect=OSError("not found")):
+            with self.assertRaises(RuntimeError) as cm:
+                fetch_host_key("example.com", "22")
+        self.assertIn("could not launch", str(cm.exception))
+
+    def test_raises_on_timeout(self) -> None:
+        import subprocess
+        with patch("subprocess.run", side_effect=subprocess.TimeoutExpired("ssh-keyscan", 15)):
+            with self.assertRaises(RuntimeError) as cm:
+                fetch_host_key("example.com", "22")
+        self.assertIn("timed out", str(cm.exception))
+
+
+# ---------------------------------------------------------------------------
+# prompt_tty
+# ---------------------------------------------------------------------------
+
+
+class TestPromptTty(unittest.TestCase):
+    def test_reads_from_tty_when_available(self) -> None:
+        import io
+        fake_tty = io.StringIO("yes\n")
+        with patch("builtins.open", return_value=fake_tty), patch("sys.stderr"):
+            result = prompt_tty("question: ")
+        self.assertEqual("yes", result)
+
+    def test_falls_back_to_stdin_on_os_error(self) -> None:
+        import io
+        with patch("builtins.open", side_effect=OSError("no tty")), \
+                patch("sys.stdin", io.StringIO("fallback\n")), \
+                patch("sys.stderr"):
+            result = prompt_tty("question: ")
+        self.assertEqual("fallback", result)
+
+
+# ---------------------------------------------------------------------------
+# add_host_key_to_frontmatter
+# ---------------------------------------------------------------------------
+
+
+class TestAddHostKeyToFrontmatter(unittest.TestCase):
+    _FILE = """\
+---
+git-gate:
+  repos:
+    myrepo:
+      url: ssh://git@host/org/repo.git
+      key:
+        provider: static
+        path: /dev/null
+---
+# Body text here
+"""
+
+    def test_inserts_host_key_at_repo_level(self) -> None:
+        result = add_host_key_to_frontmatter(self._FILE, "myrepo", "ssh-ed25519 AAAA")
+        self.assertIn("host_key: ssh-ed25519 AAAA", result)
+        # Must be a sibling of `url` and `key`, not nested inside `key`
+        lines = result.splitlines()
+        hk_line = next(l for l in lines if "host_key" in l)
+        url_line = next(l for l in lines if "url:" in l)
+        self.assertEqual(
+            len(hk_line) - len(hk_line.lstrip()),
+            len(url_line) - len(url_line.lstrip()),
+        )
+
+    def test_preserves_body(self) -> None:
+        result = add_host_key_to_frontmatter(self._FILE, "myrepo", "ssh-ed25519 AAAA")
+        self.assertIn("# Body text here", result)
+
+    def test_preserves_other_repos(self) -> None:
+        text = """\
+---
+git-gate:
+  repos:
+    first:
+      url: ssh://git@host/org/first.git
+      key:
+        provider: static
+        path: /dev/null
+    second:
+      url: ssh://git@host/org/second.git
+      key:
+        provider: static
+        path: /dev/null
+---
+"""
+        result = add_host_key_to_frontmatter(text, "first", "ssh-ed25519 AAAA")
+        self.assertIn("host_key: ssh-ed25519 AAAA", result)
+        self.assertIn("second:", result)
+
+    def test_no_change_when_host_key_already_present(self) -> None:
+        text = self._FILE.replace(
+            "        path: /dev/null\n",
+            "        path: /dev/null\n      host_key: ssh-ed25519 EXISTING\n",
+        )
+        result = add_host_key_to_frontmatter(text, "myrepo", "ssh-ed25519 NEW")
+        self.assertNotIn("NEW", result)
+
+    def test_no_change_when_repo_not_found(self) -> None:
+        result = add_host_key_to_frontmatter(self._FILE, "other", "ssh-ed25519 AAAA")
+        self.assertEqual(self._FILE, result)
+
+    def test_no_change_without_frontmatter(self) -> None:
+        text = "No frontmatter here\n"
+        result = add_host_key_to_frontmatter(text, "myrepo", "ssh-ed25519 AAAA")
+        self.assertEqual(text, result)
+
+    def test_no_change_when_no_closing_delimiter(self) -> None:
+        text = "---\ngit-gate:\n  repos:\n    myrepo:\n      url: x\n"
+        result = add_host_key_to_frontmatter(text, "myrepo", "ssh-ed25519 AAAA")
+        self.assertEqual(text, result)
+
+    def test_no_change_when_git_gate_missing(self) -> None:
+        text = "---\nenv:\n  FOO: bar\n---\n"
+        result = add_host_key_to_frontmatter(text, "myrepo", "ssh-ed25519 AAAA")
+        self.assertEqual(text, result)
+
+    def test_no_change_when_repos_missing(self) -> None:
+        text = "---\ngit-gate:\n  foo: bar\n---\n"
+        result = add_host_key_to_frontmatter(text, "myrepo", "ssh-ed25519 AAAA")
+        self.assertEqual(text, result)
+
+    def test_no_change_when_repo_entry_not_a_dict(self) -> None:
+        text = "---\ngit-gate:\n  repos:\n    - item\n---\n"
+        result = add_host_key_to_frontmatter(text, "myrepo", "ssh-ed25519 AAAA")
+        self.assertEqual(text, result)
+
+
+# ---------------------------------------------------------------------------
+# find_and_update_bottle_file
+# ---------------------------------------------------------------------------
+
+
+class TestFindAndUpdateBottleFile(unittest.TestCase):
+    def _write_bottle(self, d: str, name: str, content: str) -> Path:
+        path = Path(d) / f"{name}.md"
+        path.write_text(content, encoding="utf-8")
+        return path
+
+    def test_updates_file_with_matching_repo(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            content = """\
+---
+git-gate:
+  repos:
+    myrepo:
+      url: ssh://git@host/org/repo.git
+      key:
+        provider: static
+        path: /dev/null
+---
+"""
+            path = self._write_bottle(d, "dev", content)
+            result = find_and_update_bottle_file(Path(d), "myrepo", "ssh-ed25519 AAAA")
+            self.assertTrue(result)
+            updated = path.read_text()
+            self.assertIn("host_key: ssh-ed25519 AAAA", updated)
+
+    def test_returns_false_when_no_matching_file(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            content = """\
+---
+git-gate:
+  repos:
+    other:
+      url: ssh://git@host/org/other.git
+      key:
+        provider: static
+        path: /dev/null
+---
+"""
+            self._write_bottle(d, "dev", content)
+            result = find_and_update_bottle_file(Path(d), "myrepo", "ssh-ed25519 AAAA")
+            self.assertFalse(result)
+
+    def test_skips_file_that_already_has_host_key(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            content = """\
+---
+git-gate:
+  repos:
+    myrepo:
+      url: ssh://git@host/org/repo.git
+      key:
+        provider: static
+        path: /dev/null
+      host_key: ssh-ed25519 EXISTING
+---
+"""
+            path = self._write_bottle(d, "dev", content)
+            result = find_and_update_bottle_file(Path(d), "myrepo", "ssh-ed25519 NEW")
+            self.assertFalse(result)
+            self.assertNotIn("NEW", path.read_text())
+
+    def test_returns_false_for_nonexistent_dir(self) -> None:
+        result = find_and_update_bottle_file(
+            Path("/nonexistent/dir"), "myrepo", "ssh-ed25519 AAAA"
+        )
+        self.assertFalse(result)
+
+    def test_skips_file_without_git_gate_section(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            self._write_bottle(d, "plain", "---\nenv:\n  FOO: bar\n---\n")
+            result = find_and_update_bottle_file(Path(d), "myrepo", "ssh-ed25519 AAAA")
+            self.assertFalse(result)
+
+    def test_skips_file_with_non_dict_repos(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            self._write_bottle(d, "bad", "---\ngit-gate:\n  repos:\n    - item\n---\n")
+            result = find_and_update_bottle_file(Path(d), "myrepo", "ssh-ed25519 AAAA")
+            self.assertFalse(result)
+
+    def test_skips_invalid_utf8_file(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            path = Path(d) / "broken.md"
+            path.write_bytes(b"\xff\xfe")  # invalid UTF-8
+            result = find_and_update_bottle_file(Path(d), "myrepo", "ssh-ed25519 AAAA")
+            self.assertFalse(result)
+
+    def test_skips_unreadable_file(self) -> None:
+        import os
+        with tempfile.TemporaryDirectory() as d:
+            path = Path(d) / "unreadable.md"
+            path.write_text("---\n---\n")
+            os.chmod(path, 0o000)
+            try:
+                result = find_and_update_bottle_file(Path(d), "myrepo", "ssh-ed25519 AAAA")
+                self.assertFalse(result)
+            finally:
+                os.chmod(path, 0o644)
+
+    def test_returns_false_when_file_unreadable_on_write(self) -> None:
+        # find_repo_bottle_file succeeds, but the second read (for writing)
+        # raises OSError — e.g. file removed or permissions changed.
+        content = """\
+---
+git-gate:
+  repos:
+    myrepo:
+      url: ssh://git@host/org/repo.git
+      key:
+        provider: static
+        path: /dev/null
+---
+"""
+        with tempfile.TemporaryDirectory() as d:
+            path = self._write_bottle(d, "dev", content)
+            with patch(
+                "bot_bottle.git_gate_host_key.find_repo_bottle_file",
+                return_value=path,
+            ), patch.object(Path, "read_text", side_effect=OSError("Permission denied")):
+                result = find_and_update_bottle_file(Path(d), "myrepo", "ssh-ed25519 AAAA")
+            self.assertFalse(result)
+
+    def test_skips_when_update_produces_no_change(self) -> None:
+        # add_host_key_to_frontmatter returns the original text unchanged
+        # (e.g. because the entry is absent from the parsed structure).
+        # find_and_update_bottle_file must continue rather than write.
+        content = """\
+---
+git-gate:
+  repos:
+    myrepo:
+      url: ssh://git@host/org/repo.git
+      key:
+        provider: static
+        path: /dev/null
+---
+"""
+        with tempfile.TemporaryDirectory() as d:
+            path = self._write_bottle(d, "dev", content)
+            with patch(
+                "bot_bottle.git_gate_host_key.add_host_key_to_frontmatter",
+                return_value=content,  # no change
+            ):
+                result = find_and_update_bottle_file(Path(d), "myrepo", "ssh-ed25519 AAAA")
+            self.assertFalse(result)
+            self.assertNotIn("host_key", path.read_text())
+
+
+# ---------------------------------------------------------------------------
+# find_repo_bottle_file
+# ---------------------------------------------------------------------------
+
+
+class TestFindRepoBottleFile(unittest.TestCase):
+    _CONTENT = """\
+---
+git-gate:
+  repos:
+    myrepo:
+      url: ssh://git@host/org/repo.git
+      key:
+        provider: static
+        path: /dev/null
+---
+"""
+
+    def _write(self, d: str, name: str, content: str) -> Path:
+        path = Path(d) / f"{name}.md"
+        path.write_text(content, encoding="utf-8")
+        return path
+
+    def test_returns_path_when_repo_found(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            path = self._write(d, "dev", self._CONTENT)
+            result = find_repo_bottle_file(Path(d), "myrepo")
+            self.assertEqual(path, result)
+
+    def test_returns_none_when_no_matching_file(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            self._write(d, "dev", self._CONTENT)
+            self.assertIsNone(find_repo_bottle_file(Path(d), "other"))
+
+    def test_returns_none_when_host_key_already_set(self) -> None:
+        content = self._CONTENT.replace("        path: /dev/null\n",
+                                        "        path: /dev/null\n      host_key: X\n")
+        with tempfile.TemporaryDirectory() as d:
+            self._write(d, "dev", content)
+            self.assertIsNone(find_repo_bottle_file(Path(d), "myrepo"))
+
+    def test_returns_none_for_nonexistent_dir(self) -> None:
+        self.assertIsNone(find_repo_bottle_file(Path("/nonexistent"), "myrepo"))
+
+    def test_skips_unreadable_file(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            (Path(d) / "unreadable.md").write_text(self._CONTENT)
+            with patch.object(Path, "read_text", side_effect=OSError("Permission denied")):
+                self.assertIsNone(find_repo_bottle_file(Path(d), "myrepo"))
+
+    def test_skips_file_with_non_dict_git_gate(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            (Path(d) / "dev.md").write_text("---\ngit-gate:\n  - item\n---\n")
+            self.assertIsNone(find_repo_bottle_file(Path(d), "myrepo"))
+
+    def test_skips_file_with_non_dict_repos(self) -> None:
+        with tempfile.TemporaryDirectory() as d:
+            (Path(d) / "dev.md").write_text("---\ngit-gate:\n  repos:\n    - item\n---\n")
+            self.assertIsNone(find_repo_bottle_file(Path(d), "myrepo"))
+
+    def test_save_prompt_includes_filename(self) -> None:
+        """preflight prompt must name the discovered bottle file."""
+        manifest = _manifest_with_git()
+
+        with tempfile.TemporaryDirectory() as home:
+            bottles_dir = Path(home) / "bottles"
+            bottles_dir.mkdir()
+            bottle_file = bottles_dir / "dev.md"
+            bottle_file.write_text(
+                "---\ngit-gate:\n  repos:\n    myrepo:\n"
+                "      url: ssh://git@gitea.example.com:30009/org/myrepo.git\n"
+                "      key:\n        provider: static\n        path: /dev/null\n---\n",
+                encoding="utf-8",
+            )
+
+            mock_prompt = MagicMock(side_effect=["y", "n"])  # confirm key, skip save
+            with patch(
+                "bot_bottle.git_gate_host_key.fetch_host_key",
+                return_value="ssh-ed25519 FETCHED",
+            ), patch(
+                "bot_bottle.git_gate_host_key.prompt_tty", mock_prompt,
+            ), patch("sys.stderr"):
+                preflight_host_keys(manifest, headless=False, home_md=Path(home))
+
+            save_call = next(
+                c for c in mock_prompt.call_args_list if "Save" in c.args[0]
+            )
+            self.assertIn(str(bottle_file), save_call.args[0])
+
+
+# ---------------------------------------------------------------------------
+# preflight_host_keys
+# ---------------------------------------------------------------------------
+
+
+def _manifest_with_git(host_key: str = "") -> Manifest:
+    """Build a Manifest with one git entry; host_key defaults to empty."""
+    return ManifestIndex.from_json_obj({
+        "bottles": {
+            "dev": {
+                "git-gate": {
+                    "repos": {
+                        "myrepo": {
+                            "url": "ssh://git@gitea.example.com:30009/org/myrepo.git",
+                            "key": {"provider": "static", "path": "/dev/null"},
+                            **({"host_key": host_key} if host_key else {}),
+                        },
+                    },
+                },
+            },
+        },
+        "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},
+    }).load_for_agent("demo")
+
+
+class TestPreflightHostKeys(unittest.TestCase):
+    def test_no_op_when_all_keys_present(self) -> None:
+        manifest = _manifest_with_git("ssh-ed25519 AAAA")
+        result = preflight_host_keys(manifest, headless=False, home_md=None)
+        self.assertIs(result, manifest)
+
+    def test_headless_dies_when_key_missing(self) -> None:
+        manifest = _manifest_with_git()
+        with self.assertRaises(SystemExit):
+            preflight_host_keys(manifest, headless=True, home_md=None)
+
+    def test_interactive_fetches_and_confirms_key(self) -> None:
+        manifest = _manifest_with_git()
+
+        with patch(
+            "bot_bottle.git_gate_host_key.fetch_host_key",
+            return_value="ssh-ed25519 FETCHED",
+        ), patch(
+            "bot_bottle.git_gate_host_key.prompt_tty",
+            side_effect=["y", "n"],  # confirm key, don't persist
+        ), patch("sys.stderr"):
+            result = preflight_host_keys(manifest, headless=False, home_md=None)
+
+        self.assertEqual("ssh-ed25519 FETCHED", result.bottle.git[0].KnownHostKey)
+
+    def test_interactive_dies_when_key_not_confirmed(self) -> None:
+        manifest = _manifest_with_git()
+
+        with patch(
+            "bot_bottle.git_gate_host_key.fetch_host_key",
+            return_value="ssh-ed25519 FETCHED",
+        ), patch(
+            "bot_bottle.git_gate_host_key.prompt_tty",
+            return_value="n",
+        ), patch("sys.stderr"), self.assertRaises(SystemExit):
+            preflight_host_keys(manifest, headless=False, home_md=None)
+
+    def test_interactive_persists_when_requested(self) -> None:
+        manifest = _manifest_with_git()
+
+        with tempfile.TemporaryDirectory() as home:
+            bottles_dir = Path(home) / "bottles"
+            bottles_dir.mkdir()
+            bottle_file = bottles_dir / "dev.md"
+            bottle_file.write_text(
+                "---\ngit-gate:\n  repos:\n    myrepo:\n"
+                "      url: ssh://git@gitea.example.com:30009/org/myrepo.git\n"
+                "      key:\n        provider: static\n        path: /dev/null\n---\n",
+                encoding="utf-8",
+            )
+
+            with patch(
+                "bot_bottle.git_gate_host_key.fetch_host_key",
+                return_value="ssh-ed25519 FETCHED",
+            ), patch(
+                "bot_bottle.git_gate_host_key.prompt_tty",
+                side_effect=["y", "y"],  # confirm key, yes persist
+            ), patch("sys.stderr"):
+                result = preflight_host_keys(
+                    manifest, headless=False, home_md=Path(home),
+                )
+
+            self.assertEqual("ssh-ed25519 FETCHED", result.bottle.git[0].KnownHostKey)
+            written = bottle_file.read_text()
+            self.assertIn("host_key: ssh-ed25519 FETCHED", written)
+
+    def test_interactive_skips_persist_when_declined(self) -> None:
+        manifest = _manifest_with_git()
+
+        with tempfile.TemporaryDirectory() as home:
+            bottles_dir = Path(home) / "bottles"
+            bottles_dir.mkdir()
+            bottle_file = bottles_dir / "dev.md"
+            bottle_file.write_text(
+                "---\ngit-gate:\n  repos:\n    myrepo:\n"
+                "      url: ssh://git@gitea.example.com:30009/org/myrepo.git\n"
+                "      key:\n        provider: static\n        path: /dev/null\n---\n",
+                encoding="utf-8",
+            )
+
+            with patch(
+                "bot_bottle.git_gate_host_key.fetch_host_key",
+                return_value="ssh-ed25519 FETCHED",
+            ), patch(
+                "bot_bottle.git_gate_host_key.prompt_tty",
+                side_effect=["y", "n"],  # confirm key, no persist
+            ), patch("sys.stderr"):
+                result = preflight_host_keys(
+                    manifest, headless=False, home_md=Path(home),
+                )
+
+            self.assertEqual("ssh-ed25519 FETCHED", result.bottle.git[0].KnownHostKey)
+            written = bottle_file.read_text()
+            self.assertNotIn("host_key", written)
+
+    def test_interactive_dies_when_fetch_fails(self) -> None:
+        manifest = _manifest_with_git()
+
+        with patch(
+            "bot_bottle.git_gate_host_key.fetch_host_key",
+            side_effect=RuntimeError("connection refused"),
+        ), patch("sys.stderr"), self.assertRaises(SystemExit):
+            preflight_host_keys(manifest, headless=False, home_md=None)
+
+    def test_interactive_warns_when_persist_file_not_found(self) -> None:
+        manifest = _manifest_with_git()
+
+        with tempfile.TemporaryDirectory() as home:
+            # bottles/ dir exists but does not contain the repo entry
+            bottles_dir = Path(home) / "bottles"
+            bottles_dir.mkdir()
+
+            import io
+            buf = io.StringIO()
+            with patch(
+                "bot_bottle.git_gate_host_key.fetch_host_key",
+                return_value="ssh-ed25519 FETCHED",
+            ), patch(
+                "bot_bottle.git_gate_host_key.prompt_tty",
+                side_effect=["y"],  # confirm key only; no save prompt when no file found
+            ), patch("sys.stderr", buf):
+                result = preflight_host_keys(
+                    manifest, headless=False, home_md=Path(home),
+                )
+
+            self.assertEqual("ssh-ed25519 FETCHED", result.bottle.git[0].KnownHostKey)
+            self.assertIn("kept in memory", buf.getvalue())
+
+    def test_interactive_warns_when_write_fails_after_prompt(self) -> None:
+        # User says yes to save, but find_and_update_bottle_file fails.
+        manifest = _manifest_with_git()
+
+        with tempfile.TemporaryDirectory() as home:
+            bottles_dir = Path(home) / "bottles"
+            bottles_dir.mkdir()
+            bottle_file = bottles_dir / "dev.md"
+            bottle_file.write_text(
+                "---\ngit-gate:\n  repos:\n    myrepo:\n"
+                "      url: ssh://git@gitea.example.com:30009/org/myrepo.git\n"
+                "      key:\n        provider: static\n        path: /dev/null\n---\n",
+                encoding="utf-8",
+            )
+
+            import io
+            buf = io.StringIO()
+            with patch(
+                "bot_bottle.git_gate_host_key.fetch_host_key",
+                return_value="ssh-ed25519 FETCHED",
+            ), patch(
+                "bot_bottle.git_gate_host_key.prompt_tty",
+                side_effect=["y", "y"],  # confirm key, yes persist
+            ), patch(
+                "bot_bottle.git_gate_host_key.find_and_update_bottle_file",
+                return_value=False,
+            ), patch("sys.stderr", buf):
+                result = preflight_host_keys(
+                    manifest, headless=False, home_md=Path(home),
+                )
+
+            self.assertEqual("ssh-ed25519 FETCHED", result.bottle.git[0].KnownHostKey)
+            self.assertIn("kept in memory", buf.getvalue())
+
+    def test_headless_names_all_missing_repos_in_error(self) -> None:
+        manifest = ManifestIndex.from_json_obj({
+            "bottles": {
+                "dev": {
+                    "git-gate": {
+                        "repos": {
+                            "alpha": {
+                                "url": "ssh://git@host/org/alpha.git",
+                                "key": {"provider": "static", "path": "/dev/null"},
+                            },
+                            "beta": {
+                                "url": "ssh://git@host/org/beta.git",
+                                "key": {"provider": "static", "path": "/dev/null"},
+                            },
+                        },
+                    },
+                },
+            },
+            "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},
+        }).load_for_agent("demo")
+
+        import io
+        buf = io.StringIO()
+        with patch("sys.stderr", buf), self.assertRaises(SystemExit):
+            preflight_host_keys(manifest, headless=True, home_md=None)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/test_git_gate_render_provision.py

@@ -13,6 +13,7 @@ from pathlib import Path
 from typing import Any, cast
 from unittest.mock import patch
 
+from bot_bottle.errors import MissingEnvVarError
 from bot_bottle.git_gate import (
     _gitconfig_validate_value,
     _provision_dynamic_key,
@@ -120,7 +121,7 @@ class TestProvisionDynamicKey(unittest.TestCase):
                 patch.dict("os.environ", {}, clear=False):
             import os
             os.environ.pop("GITEA_TOK", None)
-            with self.assertRaises(RuntimeError):
+            with self.assertRaises(MissingEnvVarError):
                 _provision_dynamic_key(_gitea_entry(), "s", Path(d))
 
 
@@ -166,7 +167,7 @@ class TestRevokeProvisionedKeys(unittest.TestCase):
             import os
             os.environ.pop("GITEA_TOK", None)
             (Path(d) / "repo-deploy-key-id").write_text("kid123")
-            with self.assertRaises(RuntimeError):
+            with self.assertRaises(MissingEnvVarError):
                 revoke_git_gate_provisioned_keys(_bottle(_gitea_entry()), Path(d))
 
 

tests/unit/test_macos_container_bottle.py

@@ -30,6 +30,19 @@ class TestMacosContainerBottle(unittest.TestCase):
             argv,
         )
 
+    def test_agent_argv_accepts_absolute_provider_command(self):
+        command = "/home/node/.codex/packages/standalone/current/bin/codex"
+        bottle = MacosContainerBottle(
+            "bot-bottle-dev-abc",
+            lambda: None,
+            None,
+            agent_command=command,
+        )
+        with patch.dict(bottle_mod.os.environ, {}, clear=True):
+            argv = bottle.agent_argv(["run"])
+        self.assertIn(command, argv)
+        self.assertNotIn("codex", argv)
+
     def test_agent_argv_includes_workdir(self):
         bottle = MacosContainerBottle(
             "bot-bottle-dev-abc",

tests/unit/test_macos_container_launch.py

@@ -71,7 +71,9 @@ def _plan(
     else:
         git_gate_plan = SimpleNamespace(upstreams=())
     supervise_plan = (
-        SimpleNamespace(queue_dir=Path("/state/supervise/queue"))
+        SimpleNamespace(
+            db_path=Path("/state/bot-bottle.db"),
+        )
         if supervise else None
     )
     agent_provision = SimpleNamespace(
@@ -137,7 +139,7 @@ class TestMacosContainerLaunchArgv(unittest.TestCase):
             argv,
         )
         self.assertIn(
-            "type=bind,source=/state/supervise/queue,target=/run/supervise/queue",
+            "type=bind,source=/state,target=/run/supervise",
             argv,
         )
 

tests/unit/test_manifest_validation.py

@@ -9,7 +9,11 @@ from __future__ import annotations
 
 import unittest
 
-from bot_bottle.manifest import ManifestBottle, ManifestIndex
+from unittest.mock import patch
+
+from bot_bottle.env import resolve_env
+from bot_bottle.errors import MissingEnvVarError
+from bot_bottle.manifest import Manifest, ManifestBottle, ManifestIndex
 from bot_bottle.manifest_agent import (
     ManifestAgent,
     ManifestAgentProvider,
@@ -238,5 +242,26 @@ class TestEagerIndexLookups(unittest.TestCase):
         self.assertIsNone(m.git_identity_summary())
 
 
+class TestResolveEnv(unittest.TestCase):
+    """resolve_env raises MissingEnvVarError when an interpolated entry's
+    host var is unset."""
+
+    def _manifest(self, env_dict: dict[str, str]) -> Manifest:
+        idx = ManifestIndex.from_json_obj({
+            "bottles": {"dev": {"env": env_dict}},
+            "agents": {"demo": {"bottle": "dev"}},
+        })
+        return idx.load_for_agent("demo")
+
+    def test_missing_interpolated_host_var_raises(self):
+        manifest = self._manifest({"API_KEY": "${HOST_API_KEY}"})
+        with patch.dict("os.environ", {}, clear=False):
+            import os
+            os.environ.pop("HOST_API_KEY", None)
+            with self.assertRaises(MissingEnvVarError) as cm:
+                resolve_env(manifest)
+        self.assertIn("HOST_API_KEY", str(cm.exception))
+
+
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_smolmachines_bottle.py

@@ -79,6 +79,11 @@ class TestClaudeArgvWrapped(unittest.TestCase):
                 "--",
                 "runuser", "-u", "node", "--",
                 "env", "HOME=/home/node", "USER=node",
+                (
+                    "PATH=/home/node/.local/bin:"
+                    "/home/node/.codex/packages/standalone/current/bin:"
+                    "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+                ),
                 "claude",
             ],
             argv,
@@ -127,16 +132,24 @@ class TestClaudeArgvWrapped(unittest.TestCase):
         self.assertIn("HTTPS_PROXY=http://127.0.0.1:1234", argv)
         self.assertIn("NO_PROXY=localhost", argv)
 
+    def test_guest_env_path_overrides_default_path(self):
+        argv = _unwrap(_bottle(None, PATH="/custom/bin").agent_argv([]))
+        self.assertIn("PATH=/custom/bin", argv)
+        self.assertFalse(any(
+            item.startswith("PATH=/home/node/.local/bin")
+            for item in argv
+        ))
+
     def test_runuser_switch_precedes_claude(self):
         # The dashboard's `_build_resume_argv_with_fallback` finds
         # the `claude` token to split exec-framing from the claude
         # tail. `runuser -u node --` must sit on the prefix side so
         # the shell wrap inherits the UID switch.
         argv = _bottle().agent_argv([])
-        agent_idx = argv.index("claude")
+        runuser_idx = argv.index("runuser")
         self.assertEqual(
             ["runuser", "-u", "node", "--", "env"],
-            argv[agent_idx - 7:agent_idx - 2],
+            argv[runuser_idx:runuser_idx + 5],
         )
 
     def test_pi_provider_appends_system_prompt_without_print_mode(self):

tests/unit/test_smolmachines_egress_apply.py

@@ -0,0 +1,58 @@
+from __future__ import annotations
+
+import unittest
+from unittest.mock import patch
+
+from bot_bottle.backend.egress_apply import EgressApplyError
+from bot_bottle.backend.smolmachines import egress_apply
+from bot_bottle.backend.smolmachines.smolvm import SmolvmRunResult
+
+
+class TestFetchCurrentRoutes(unittest.TestCase):
+    def test_reads_routes_from_sidecar_vm(self):
+        with patch.object(
+            egress_apply._smolvm,
+            "machine_exec",
+            return_value=SmolvmRunResult(0, "routes", ""),
+        ) as exec_:
+            self.assertEqual("routes", egress_apply.fetch_current_routes("dev-abc"))
+        exec_.assert_called_once_with(
+            "bot-bottle-sidecars-dev-abc",
+            ["cat", "/etc/egress/routes.yaml"],
+        )
+
+    def test_read_failure_raises_apply_error(self):
+        with patch.object(
+            egress_apply._smolvm,
+            "machine_exec",
+            return_value=SmolvmRunResult(1, "", "nope"),
+        ):
+            with self.assertRaises(EgressApplyError):
+                egress_apply.fetch_current_routes("dev-abc")
+
+
+class TestReload(unittest.TestCase):
+    def test_sends_hup_to_sidecar_init(self):
+        with patch.object(
+            egress_apply._smolvm,
+            "machine_exec",
+            return_value=SmolvmRunResult(0, "", ""),
+        ) as exec_:
+            egress_apply.SmolmachinesEgressApplicator()._signal_bundle_reload("dev-abc")
+        exec_.assert_called_once_with(
+            "bot-bottle-sidecars-dev-abc",
+            ["sh", "-c", "kill -HUP 1"],
+        )
+
+    def test_reload_failure_raises_apply_error(self):
+        with patch.object(
+            egress_apply._smolvm,
+            "machine_exec",
+            return_value=SmolvmRunResult(1, "", "nope"),
+        ):
+            with self.assertRaises(EgressApplyError):
+                egress_apply.SmolmachinesEgressApplicator()._signal_bundle_reload("dev-abc")
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/test_smolmachines_enumerate.py

@@ -0,0 +1,66 @@
+"""Unit: smolmachines active-agent enumeration."""
+
+from __future__ import annotations
+
+import json
+import subprocess
+import unittest
+from unittest.mock import patch
+
+from bot_bottle.backend.smolmachines import enumerate as _enumerate
+
+
+def _completed(
+    stdout: str,
+    returncode: int = 0,
+) -> subprocess.CompletedProcess:  # type: ignore[type-arg]
+    return subprocess.CompletedProcess(
+        args=[],
+        returncode=returncode,
+        stdout=stdout,
+        stderr="",
+    )
+
+
+class TestEnumerateActive(unittest.TestCase):
+    def test_skips_sidecar_vms(self):
+        machines = [
+            {"name": "bot-bottle-demo-abc12", "state": "running"},
+            {"name": "bot-bottle-sidecars-demo-abc12", "state": "running"},
+            {"name": "bot-bottle-stopped-xyz", "state": "stopped"},
+            {"name": "other", "state": "running"},
+        ]
+
+        class _Metadata:
+            agent_name = "demo"
+            started_at = "2026-07-09T00:00:00Z"
+            label = "Demo"
+            color = "green"
+
+        with patch(
+            "bot_bottle.backend.smolmachines.enumerate.subprocess.run",
+            return_value=_completed(json.dumps(machines)),
+        ), patch(
+            "bot_bottle.backend.smolmachines.enumerate._query_bundle_services",
+            return_value={"demo-abc12": ("egress",)},
+        ), patch(
+            "bot_bottle.backend.smolmachines.enumerate.read_metadata",
+            return_value=_Metadata(),
+        ) as read_metadata:
+            active = _enumerate.enumerate_active()
+
+        self.assertEqual(1, len(active))
+        self.assertEqual("demo-abc12", active[0].slug)
+        self.assertEqual(("egress",), active[0].services)
+        read_metadata.assert_called_once_with("demo-abc12")
+
+    def test_invalid_smolvm_output_returns_empty(self):
+        with patch(
+            "bot_bottle.backend.smolmachines.enumerate.subprocess.run",
+            return_value=_completed("not json"),
+        ):
+            self.assertEqual([], _enumerate.enumerate_active())
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/test_smolmachines_launch_image.py

@@ -94,6 +94,10 @@ class TestEnsureSmolmachine(unittest.TestCase):
                 calls.append(name)
             return _f
 
+        def save_and_record(image_ref: str, path: str) -> None:
+            Path(path).touch()
+            calls.append("save")
+
         with patch.object(
             _launch_mod.docker_mod, "build_image",
             side_effect=record("build"),
@@ -102,7 +106,7 @@ class TestEnsureSmolmachine(unittest.TestCase):
             return_value=f"sha256:{digest}fffffffffffffffff",
         ), patch.object(
             _launch_mod.docker_mod, "save",
-            side_effect=record("save"),
+            side_effect=save_and_record,
         ) as save, patch.object(
             _launch_mod, "ephemeral_registry",
             return_value=_Reg(),

tests/unit/test_smolmachines_loopback_alias.py

@@ -8,6 +8,7 @@ inspecting running bundle containers' port bindings."""
 from __future__ import annotations
 
 import json
+import os
 import sqlite3
 import subprocess
 import tempfile
@@ -112,9 +113,16 @@ class TestEnsurePool(unittest.TestCase):
 
 
 class TestAllocate(unittest.TestCase):
-    def test_returns_loopback_on_linux(self):
+    def test_per_bottle_alias_on_linux(self):
-        with patch.object(loopback_alias, "_is_macos", return_value=False):
+        # Linux gets the same per-bottle scoping as macOS (127/8 is
-            self.assertEqual("127.0.0.1", loopback_alias.allocate("demo"))
+        # already loopback, so no ifconfig is needed). A fresh host
+        # with no running bundles allocates the first pool entry.
+        with tempfile.TemporaryDirectory() as tmp:
+            lock_path = Path(tmp) / "smolmachines.lock"
+            with patch.object(loopback_alias, "_is_macos", return_value=False), \
+                 patch.object(loopback_alias, "_ALLOC_LOCK_PATH", lock_path), \
+                 patch.object(loopback_alias, "_aliases_in_use", return_value=set()):
+                self.assertEqual("127.0.0.16", loopback_alias.allocate("demo"))
 
     def test_picks_lowest_unused_on_macos(self):
         # No bundles running -> first pool entry.
@@ -166,12 +174,25 @@ class TestAllocateLock(unittest.TestCase):
 
         self.assertIn(fcntl_mod.LOCK_EX, flock_calls)
 
-    def test_no_lock_on_linux(self):
+    def test_acquires_exclusive_lock_on_linux(self):
-        # Linux early-returns before touching the lock file.
+        # Linux allocates per-bottle too, so it must take the same
-        with patch.object(loopback_alias, "_is_macos", return_value=False), \
+        # lock to serialise concurrent launches.
-             patch.object(loopback_alias.fcntl, "flock") as flock:
+        import fcntl as fcntl_mod
-            loopback_alias.allocate("demo")
+        flock_calls: list[int] = []
-        flock.assert_not_called()
+
+        def record_flock(fd, op):  # type: ignore
+            flock_calls.append(op)
+
+        with tempfile.TemporaryDirectory() as tmp:
+            lock_path = Path(tmp) / "smolmachines.lock"
+            with patch.object(loopback_alias, "_is_macos", return_value=False), \
+                 patch.object(loopback_alias, "_ALLOC_LOCK_PATH", lock_path), \
+                 patch.object(loopback_alias, "_aliases_in_use", return_value=set()), \
+                 patch.object(loopback_alias.fcntl, "flock",
+                              side_effect=record_flock):
+                loopback_alias.allocate("demo")
+
+        self.assertIn(fcntl_mod.LOCK_EX, flock_calls)
 
     def test_sequential_allocations_with_shared_lock_are_serialised(self):
         # Two sequential calls share the same lock file. The second
@@ -241,10 +262,12 @@ class TestAliasInUseDetection(unittest.TestCase):
 
 
 class TestForceAllowlist(unittest.TestCase):
-    """Smolvm 0.8.0 silently drops `--allow-cidr` with `--from`,
+    """Smolvm 0.8.0 silently drops `--allow-cidr` with `--from`, so
-    so `force_allowlist` opens the state DB directly and sets
+    `force_allowlist` opens the state DB directly and sets the row's
-    the row's `allowed_cidrs` field. Round-trip tests against a
+    `allowed_cidrs` field — on both macOS and Linux. It is
-    real SQLite DB to lock down the BLOB encoding."""
+    fail-closed: it dies rather than launching a VM whose allowlist
+    it can't confirm. Round-trip tests against a real SQLite DB to
+    lock down the BLOB encoding."""
 
     def setUp(self):
         self._tmp = tempfile.TemporaryDirectory(prefix="smolvm-db.")
@@ -290,17 +313,67 @@ class TestForceAllowlist(unittest.TestCase):
         self.assertEqual(4, cfg["cpus"])
         self.assertTrue(cfg["network"])
 
-    def test_noop_on_linux(self):
+    def test_patches_on_linux_too(self):
+        # force_allowlist no longer no-ops on Linux — the TSI
+        # allowlist must be enforced there as well.
         with patch.object(loopback_alias, "_is_macos", return_value=False), \
              patch.object(loopback_alias, "_SMOLVM_DB_PATH", self.db):
             loopback_alias.force_allowlist("demo-vm", ["127.0.0.16/32"])
-        # DB row should be untouched.
         con = sqlite3.connect(str(self.db))
         cfg = json.loads(con.execute(
             "SELECT data FROM vms WHERE name='demo-vm'",
         ).fetchone()[0])
         con.close()
-        self.assertIsNone(cfg["allowed_cidrs"])
+        self.assertEqual(["127.0.0.16/32"], cfg["allowed_cidrs"])
+
+    def test_skips_write_when_already_matching(self):
+        # A newer smolvm that honors --allow-cidr at create leaves the
+        # row already correct; force_allowlist must not rewrite it. We
+        # detect a no-write by comparing the raw BLOB byte-for-byte
+        # (a rewrite re-serialises the JSON, changing key order/bytes
+        # is not guaranteed, but mtime/identity isn't observable — so
+        # we assert the stored bytes are exactly what we pre-seeded).
+        seeded = json.dumps({
+            "name": "demo-vm", "cpus": 4, "mem": 8192,
+            "network": True, "allowed_cidrs": ["127.0.0.16/32"],
+        }).encode()
+        con = sqlite3.connect(str(self.db))
+        con.execute(
+            "UPDATE vms SET data=? WHERE name='demo-vm'",
+            (sqlite3.Binary(seeded),),
+        )
+        con.commit()
+        con.close()
+
+        with patch.object(loopback_alias, "_is_macos", return_value=True), \
+             patch.object(loopback_alias, "_SMOLVM_DB_PATH", self.db):
+            loopback_alias.force_allowlist("demo-vm", ["127.0.0.16/32"])
+
+        con = sqlite3.connect(str(self.db))
+        stored = con.execute(
+            "SELECT data FROM vms WHERE name='demo-vm'").fetchone()[0]
+        con.close()
+        self.assertEqual(seeded, bytes(stored))
+
+    def test_dies_when_patch_does_not_take(self):
+        # If the persisted allowlist still doesn't match after the
+        # patch (e.g. wrong schema / smolvm stores it elsewhere),
+        # force_allowlist must fail closed rather than boot the VM.
+        original = loopback_alias._read_machine_cfg
+
+        def stale_cfg(con: sqlite3.Connection, name: str) -> dict[str, object]:
+            # Always report the un-patched row so the post-write
+            # verification never sees the requested cidrs.
+            cfg = original(con, name)
+            cfg["allowed_cidrs"] = None
+            return cfg
+
+        with patch.object(loopback_alias, "_is_macos", return_value=True), \
+             patch.object(loopback_alias, "_SMOLVM_DB_PATH", self.db), \
+             patch.object(loopback_alias, "_read_machine_cfg", side_effect=stale_cfg), \
+             patch.object(loopback_alias, "die", side_effect=SystemExit("die")):
+            with self.assertRaises(SystemExit):
+                loopback_alias.force_allowlist("demo-vm", ["127.0.0.16/32"])
 
     def test_dies_on_missing_db(self):
         with patch.object(loopback_alias, "_is_macos", return_value=True), \
@@ -323,5 +396,35 @@ class TestForceAllowlist(unittest.TestCase):
                 loopback_alias.force_allowlist("not-in-db", ["127.0.0.16/32"])
 
 
+class TestSmolvmDbPath(unittest.TestCase):
+    """The smolvm state-DB path is platform-derived: Application
+    Support on macOS, XDG data dir on Linux."""
+
+    def test_macos_path(self):
+        with patch.object(loopback_alias.platform, "system", return_value="Darwin"):
+            p = loopback_alias._smolvm_db_path()
+        self.assertEqual(
+            ("Library", "Application Support", "smolvm", "server", "smolvm.db"),
+            p.parts[-5:],
+        )
+
+    def test_linux_default_xdg_path(self):
+        env = {k: v for k, v in os.environ.items() if k != "XDG_DATA_HOME"}
+        with patch.object(loopback_alias.platform, "system", return_value="Linux"), \
+             patch.dict(loopback_alias.os.environ, env, clear=True):
+            p = loopback_alias._smolvm_db_path()
+        self.assertEqual(
+            (".local", "share", "smolvm", "server", "smolvm.db"),
+            p.parts[-5:],
+        )
+
+    def test_linux_respects_xdg_data_home(self):
+        with patch.object(loopback_alias.platform, "system", return_value="Linux"), \
+             patch.dict(loopback_alias.os.environ,
+                        {"XDG_DATA_HOME": "/custom/data"}, clear=False):
+            p = loopback_alias._smolvm_db_path()
+        self.assertEqual(Path("/custom/data/smolvm/server/smolvm.db"), p)
+
+
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_smolmachines_port_forward.py

@@ -0,0 +1,325 @@
+from __future__ import annotations
+
+import json
+import socket
+import subprocess
+import threading
+import unittest
+from unittest.mock import MagicMock, patch
+
+from bot_bottle.backend.smolmachines.port_forward import (
+    ForwardSpec,
+    ForwarderHandle,
+    _CompletedProcess,
+    _Forwarder,
+    _pipe,
+    main,
+    start_forwarder,
+    stop_forwarder,
+)
+
+
+def _echo_server() -> tuple[socket.socket, int]:
+    listener = socket.create_server(("127.0.0.1", 0))
+    port = int(listener.getsockname()[1])
+
+    def run() -> None:
+        with listener:
+            conn, _ = listener.accept()
+            with conn:
+                while True:
+                    data = conn.recv(65536)
+                    if not data:
+                        return
+                    conn.sendall(data)
+
+    threading.Thread(target=run, daemon=True).start()
+    return listener, port
+
+
+class TestForwarderValidation(unittest.TestCase):
+    def test_empty_specs_returns_noop_handle(self):
+        handle = start_forwarder(())
+
+        self.assertEqual((), handle.forwards)
+        self.assertEqual(0, handle.process.poll())
+        stop_forwarder(handle)
+
+    def test_rejects_generic_localhost_listener(self):
+        with self.assertRaises(SystemExit):
+            start_forwarder((
+                ForwardSpec(
+                    label="egress",
+                    listen_host="127.0.0.1",
+                    listen_port=0,
+                    target_host="127.0.0.1",
+                    target_port=9099,
+                ),
+            ))
+
+    def test_rejects_wildcard_listener(self):
+        with self.assertRaises(SystemExit):
+            start_forwarder((
+                ForwardSpec(
+                    label="egress",
+                    listen_host="0.0.0.0",
+                    listen_port=0,
+                    target_host="127.0.0.1",
+                    target_port=9099,
+                ),
+            ))
+
+    def test_rejects_non_loopback_target(self):
+        with self.assertRaises(SystemExit):
+            start_forwarder((
+                ForwardSpec(
+                    label="egress",
+                    listen_host="127.0.0.16",
+                    listen_port=0,
+                    target_host="192.0.2.10",
+                    target_port=9099,
+                ),
+            ))
+
+    def test_rejects_invalid_ports(self):
+        with self.assertRaises(SystemExit):
+            start_forwarder((
+                ForwardSpec("bad-listen", "127.0.0.2", 70000, "127.0.0.1", 9099),
+            ))
+        with self.assertRaises(SystemExit):
+            start_forwarder((
+                ForwardSpec("bad-target", "127.0.0.2", 0, "127.0.0.1", 0),
+            ))
+
+    def test_completed_process_methods_are_noops(self):
+        proc = _CompletedProcess()
+
+        proc.terminate()
+        proc.kill()
+
+        self.assertEqual(0, proc.poll())
+        self.assertEqual(0, proc.wait(timeout=1))
+
+
+class _FakeStdout:
+    def __init__(self, line: str):
+        self.line = line
+        self.closed = False
+
+    def readline(self) -> str:
+        return self.line
+
+    def close(self) -> None:
+        self.closed = True
+
+
+class TestForwarderProcess(unittest.TestCase):
+    def test_start_parses_ready_payload(self):
+        payload = {
+            "forwards": [{
+                "label": "egress",
+                "listen_host": "127.0.0.2",
+                "listen_port": 61000,
+                "target_host": "127.0.0.1",
+                "target_port": 55000,
+            }],
+        }
+        proc = MagicMock()
+        proc.stdout = _FakeStdout(json.dumps(payload) + "\n")
+
+        with patch(
+            "bot_bottle.backend.smolmachines.port_forward.subprocess.Popen",
+            return_value=proc,
+        ) as popen:
+            handle = start_forwarder((
+                ForwardSpec("egress", "127.0.0.2", 0, "127.0.0.1", 55000),
+            ))
+
+        self.assertIs(proc, handle.process)
+        self.assertEqual(61000, handle.forwards[0].listen_port)
+        self.assertTrue(proc.stdout.closed)
+        argv = popen.call_args.args[0]
+        self.assertIn("--spec-json", argv)
+
+    def test_start_dies_when_helper_exits_before_ready(self):
+        proc = MagicMock()
+        proc.stdout = _FakeStdout("")
+
+        with patch(
+            "bot_bottle.backend.smolmachines.port_forward.subprocess.Popen",
+            return_value=proc,
+        ):
+            with self.assertRaises(SystemExit):
+                start_forwarder((
+                    ForwardSpec("egress", "127.0.0.2", 0, "127.0.0.1", 55000),
+                ))
+
+        proc.terminate.assert_called_once()
+        proc.wait.assert_called_once_with(timeout=5)
+
+    def test_start_dies_on_invalid_ready_payload(self):
+        proc = MagicMock()
+        proc.stdout = _FakeStdout('{"wrong": []}\n')
+
+        with patch(
+            "bot_bottle.backend.smolmachines.port_forward.subprocess.Popen",
+            return_value=proc,
+        ):
+            with self.assertRaises(SystemExit):
+                start_forwarder((
+                    ForwardSpec("egress", "127.0.0.2", 0, "127.0.0.1", 55000),
+                ))
+
+        proc.terminate.assert_called_once()
+        proc.wait.assert_called_once_with(timeout=5)
+
+    def test_stop_kills_process_after_timeout(self):
+        proc = MagicMock()
+        proc.poll.return_value = None
+        proc.wait.side_effect = [subprocess.TimeoutExpired("cmd", 5), 0]
+
+        stop_forwarder(ForwarderHandle(process=proc, forwards=()))
+
+        proc.terminate.assert_called_once()
+        proc.kill.assert_called_once()
+        self.assertEqual(2, proc.wait.call_count)
+
+
+class TestForwarding(unittest.TestCase):
+    def test_forwards_bytes_both_directions(self):
+        try:
+            probe = socket.create_server(("127.0.0.2", 0))
+        except OSError:
+            self.skipTest("127.0.0.2 is not bindable on this host")
+        else:
+            probe.close()
+        _listener, target_port = _echo_server()
+        handle = start_forwarder((
+            ForwardSpec(
+                label="egress",
+                listen_host="127.0.0.2",
+                listen_port=0,
+                target_host="127.0.0.1",
+                target_port=target_port,
+            ),
+        ))
+        try:
+            bound = handle.forwards[0]
+            with socket.create_connection((bound.listen_host, bound.listen_port)) as sock:
+                sock.sendall(b"hello")
+                self.assertEqual(b"hello", sock.recv(5))
+        finally:
+            stop_forwarder(handle)
+
+
+class TestForwarderInProcess(unittest.TestCase):
+    def test_forwarder_serves_and_stops_in_process(self):
+        _listener, target_port = _echo_server()
+        forwarder = _Forwarder((
+            ForwardSpec("egress", "127.0.0.2", 0, "127.0.0.1", target_port),
+        ))
+        forwarder.start()
+        thread = threading.Thread(target=forwarder.serve, daemon=True)
+        thread.start()
+        try:
+            bound = forwarder.bound[0]
+            with socket.create_connection((bound.listen_host, bound.listen_port)) as sock:
+                sock.sendall(b"ping")
+                self.assertEqual(b"ping", sock.recv(4))
+        finally:
+            forwarder.stop()
+            thread.join(timeout=2)
+
+        self.assertFalse(thread.is_alive())
+
+    def test_forwarder_logs_target_connect_failure(self):
+        forwarder = _Forwarder((
+            ForwardSpec("egress", "127.0.0.2", 0, "127.0.0.1", 1),
+        ))
+        forwarder.start()
+        thread = threading.Thread(target=forwarder.serve, daemon=True)
+        thread.start()
+        try:
+            bound = forwarder.bound[0]
+            with patch("bot_bottle.backend.smolmachines.port_forward.warn") as warn:
+                with socket.create_connection((bound.listen_host, bound.listen_port)):
+                    pass
+                for _ in range(100):
+                    if warn.called:
+                        break
+                    threading.Event().wait(0.01)
+            self.assertTrue(warn.called)
+        finally:
+            forwarder.stop()
+            thread.join(timeout=2)
+
+    def test_pipe_stops_when_recv_fails(self):
+        src, dst = socket.socketpair()
+        src.close()
+        try:
+            _pipe(src, dst)
+        finally:
+            dst.close()
+
+    def test_pipe_stops_when_send_fails(self):
+        src, src_peer = socket.socketpair()
+        _dst_peer, dst = socket.socketpair()
+        dst.close()
+        try:
+            src_peer.sendall(b"hello")
+            src_peer.shutdown(socket.SHUT_WR)
+            _pipe(src, dst)
+        finally:
+            src.close()
+            src_peer.close()
+            _dst_peer.close()
+
+
+class TestMain(unittest.TestCase):
+    def test_main_starts_serves_and_stops_forwarder(self):
+        calls: list[str] = []
+        handlers = []
+
+        class FakeForwarder:
+            def __init__(self, specs):  # type: ignore[no-untyped-def]
+                self.specs = specs
+                self.bound = specs
+
+            def start(self) -> None:
+                calls.append("start")
+
+            def serve(self) -> None:
+                calls.append("serve")
+
+            def stop(self) -> None:
+                calls.append("stop")
+
+        def record_signal(_signum, handler):  # type: ignore[no-untyped-def]
+            handlers.append(handler)
+
+        spec = ForwardSpec("egress", "127.0.0.2", 0, "127.0.0.1", 9099)
+        with patch(
+            "bot_bottle.backend.smolmachines.port_forward._Forwarder",
+            FakeForwarder,
+        ), patch(
+            "bot_bottle.backend.smolmachines.port_forward.signal.signal",
+            side_effect=record_signal,
+        ), patch("builtins.print") as print_mock:
+            self.assertEqual(
+                0,
+                main(("--spec-json", json.dumps([{
+                    "label": spec.label,
+                    "listen_host": spec.listen_host,
+                    "listen_port": spec.listen_port,
+                    "target_host": spec.target_host,
+                    "target_port": spec.target_port,
+                }]))),
+            )
+            handlers[0](15, None)
+
+        self.assertEqual(["start", "serve", "stop", "stop"], calls)
+        self.assertIn("forwards", print_mock.call_args.args[0])
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/test_smolmachines_provision.py

@@ -9,6 +9,7 @@ from __future__ import annotations
 import subprocess
 import tempfile
 import unittest
+from contextlib import ExitStack
 from dataclasses import replace
 from pathlib import Path
 from unittest.mock import MagicMock, patch
@@ -27,6 +28,7 @@ from bot_bottle.backend.smolmachines.bottle_plan import (
     SmolmachinesBottlePlan,
 )
 from bot_bottle.backend.smolmachines import launch as _launch
+from bot_bottle.backend.smolmachines import port_forward as _forward
 from bot_bottle.backend.smolmachines.launch import _bundle_launch_spec
 from bot_bottle.backend.util import AGENT_CA_PATH
 from bot_bottle.egress import EgressPlan, EgressRoute
@@ -130,7 +132,7 @@ def _plan(
     if supervise:
         supervise_plan = SupervisePlan(
             slug="demo-abc12",
-            queue_dir=Path("/tmp/queue"),
+            db_path=Path("/tmp/bot-bottle.db"),
         )
     return SmolmachinesBottlePlan(
         spec=spec,
@@ -276,8 +278,8 @@ class TestProvisionCA(unittest.TestCase):
             str(self.egress_ca),
             AGENT_CA_PATH,
         )
-        bottle.exec.assert_called_once()
+        self.assertEqual(2, bottle.exec.call_count)
-        script = bottle.exec.call_args.args[0]
+        script = bottle.exec.call_args_list[1].args[0]
         self.assertIn("chmod 644", script)
         self.assertIn("update-ca-certificates", script)
         self.assertEqual("root", bottle.exec.call_args.kwargs.get("user"))
@@ -422,14 +424,17 @@ class TestBundleLaunchSpec(unittest.TestCase):
             spec.environment,
         )
 
+    def test_supervise_adds_daemon_volume_and_env(self):
+        from bot_bottle.supervise import DB_PATH_IN_CONTAINER
+        plan = _plan(supervise=True)
+        spec = _bundle_launch_spec(plan, "net", "127.0.0.16")
+        self.assertIn("supervise", spec.daemons_csv)
+        self.assertIn(f"SUPERVISE_DB_PATH={DB_PATH_IN_CONTAINER}", spec.environment)
+        self.assertIn(("/tmp/bot-bottle.db", DB_PATH_IN_CONTAINER, False), spec.volumes)
+
     def test_canary_env_visible_to_smolvm_guest(self):
         plan = _plan(canary=True)
-        with patch.object(
+        stamped = _launch._discover_urls(plan, "127.0.0.16", {9099: 65000})
-            _launch._bundle,
-            "bundle_host_port",
-            return_value="65000",
-        ):
-            stamped = _launch._discover_urls(plan, "127.0.0.16")
 
         self.assertEqual(
             "fake-canary-value",
@@ -498,5 +503,148 @@ class TestProvisionGitUser(unittest.TestCase):
         self.assertIn("bot@example.com", calls[0][0])
 
 
+class TestLaunchResourceWiring(unittest.TestCase):
+    def test_allocate_resources_uses_loopback_alias_and_bundle_name(self):
+        plan = _plan()
+        with patch(
+            "bot_bottle.backend.smolmachines.launch._loopback.ensure_pool",
+        ) as ensure_pool, patch(
+            "bot_bottle.backend.smolmachines.launch._loopback.allocate",
+            return_value="127.0.0.16",
+        ) as allocate:
+            loopback_ip, network = _launch._allocate_resources(plan, ExitStack())
+
+        ensure_pool.assert_called_once_with()
+        allocate.assert_called_once_with("demo-abc12")
+        self.assertEqual("127.0.0.16", loopback_ip)
+        self.assertEqual("bot-bottle-bundle-demo-abc12", network)
+
+    def test_start_bundle_wraps_raw_vm_ports_with_forwarder_ports(self):
+        plan = _plan(supervise=True)
+        plan = replace(
+            plan,
+            git_gate_plan=replace(
+                plan.git_gate_plan,
+                upstreams=(GitGateUpstream(
+                    name="bot-bottle",
+                    upstream_url="ssh://git@host/repo.git",
+                    upstream_host="host",
+                    upstream_port="22",
+                    identity_file="/tmp/key",
+                    known_host_key="",
+                ),),
+            ),
+        )
+        stack = MagicMock(spec=ExitStack)
+        raw_launch = MagicMock(raw_ports={9099: 55001, 9420: 55002, 9100: 55003})
+        handle = _forward.ForwarderHandle(
+            process=MagicMock(),
+            forwards=(
+                _forward.ForwardSpec("egress", "127.0.0.16", 65001, "127.0.0.1", 55001),
+                _forward.ForwardSpec("git-http", "127.0.0.16", 65002, "127.0.0.1", 55002),
+                _forward.ForwardSpec("supervise", "127.0.0.16", 65003, "127.0.0.1", 55003),
+            ),
+        )
+
+        with patch(
+            "bot_bottle.backend.smolmachines.launch._provision_git_gate_keys",
+            return_value=plan,
+        ), patch(
+            "bot_bottle.backend.smolmachines.launch._ensure_smolmachine",
+            return_value=Path("/cache/sidecar.smolmachine"),
+        ) as ensure, patch(
+            "bot_bottle.backend.smolmachines.launch._bundle.start_bundle_vm",
+            return_value=raw_launch,
+        ) as start_vm, patch(
+            "bot_bottle.backend.smolmachines.launch._forward.start_forwarder",
+            return_value=handle,
+        ) as start_forwarder:
+            stamped = _launch._start_bundle(plan, "net", "127.0.0.16", stack)
+
+        ensure.assert_called_once()
+        start_vm.assert_called_once()
+        self.assertEqual(Path("/cache/sidecar.smolmachine"), start_vm.call_args.kwargs["from_path"])
+        specs = start_forwarder.call_args.args[0]
+        self.assertEqual(
+            (
+                _forward.ForwardSpec("egress", "127.0.0.16", 0, "127.0.0.1", 55001),
+                _forward.ForwardSpec("git-http", "127.0.0.16", 0, "127.0.0.1", 55002),
+                _forward.ForwardSpec("supervise", "127.0.0.16", 0, "127.0.0.1", 55003),
+            ),
+            specs,
+        )
+        self.assertEqual("http://127.0.0.16:65001", stamped.agent_proxy_url)
+        self.assertEqual("127.0.0.16:65002", stamped.agent_git_gate_host)
+        self.assertEqual("http://127.0.0.16:65003/", stamped.agent_supervise_url)
+        self.assertEqual(2, stack.callback.call_count)
+
+    def test_init_vm_repairs_ownership_then_waits_for_exec(self):
+        plan = _plan()
+        with patch(
+            "bot_bottle.backend.smolmachines.launch._smolvm.machine_exec",
+        ) as machine_exec, patch(
+            "bot_bottle.backend.smolmachines.launch._smolvm.wait_exec_ready",
+        ) as wait_exec_ready:
+            _launch._init_vm(plan)
+
+        machine_exec.assert_called_once()
+        argv = machine_exec.call_args.args[1]
+        self.assertEqual(["sh", "-c"], argv[:2])
+        self.assertIn("chown -R node:node /home/node", argv[2])
+        wait_exec_ready.assert_called_once_with(plan.machine_name)
+
+
+class TestPortLabels(unittest.TestCase):
+    def test_known_and_dynamic_port_labels_round_trip(self):
+        for port, label in (
+            (9099, "egress"),
+            (9420, "git-http"),
+            (9100, "supervise"),
+            (12345, "port-12345"),
+        ):
+            self.assertEqual(label, _launch._label_for_port(port))
+            self.assertEqual(port, _launch._port_for_label(label))
+
+    def test_unknown_label_is_rejected(self):
+        with self.assertRaises(ValueError):
+            _launch._port_for_label("sidecar")
+
+
+class TestDiscoverUrls(unittest.TestCase):
+    """_discover_urls stamps git-gate host + supervise URL into the plan."""
+
+    def test_git_gate_host_set_when_upstreams_present(self):
+        plan = _plan()
+        plan = replace(
+            plan,
+            git_gate_plan=replace(
+                plan.git_gate_plan,
+                upstreams=(GitGateUpstream(
+                    name="bot-bottle",
+                    upstream_url="ssh://git@host/repo.git",
+                    upstream_host="host",
+                    upstream_port="22",
+                    identity_file="/tmp/key",
+                    known_host_key="",
+                ),),
+            ),
+        )
+        stamped = _launch._discover_urls(
+            plan,
+            "127.0.0.16",
+            {9099: 65000, 9420: 65001},
+        )
+        self.assertEqual("127.0.0.16:65001", stamped.agent_git_gate_host)
+
+    def test_supervise_url_set_when_supervise_present(self):
+        plan = _plan(supervise=True)
+        stamped = _launch._discover_urls(
+            plan,
+            "127.0.0.16",
+            {9099: 65000, 9100: 55556},
+        )
+        self.assertEqual("http://127.0.0.16:55556/", stamped.agent_supervise_url)
+
+
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_smolmachines_sidecar_bundle.py

@@ -1,9 +1,4 @@
-"""Unit: bundle bringup primitives for the smolmachines backend
+"""Unit: bundle bringup primitives for the smolmachines backend."""
-(PRD 0023 chunk 2c).
-
-Tests mock `subprocess.run` and assert on the docker argv shape.
-The end-to-end integration smoke (real docker daemon, real
-bundle image) lands in chunk 2d."""
 
 from __future__ import annotations
 
@@ -14,28 +9,15 @@ from unittest.mock import patch
 
 from bot_bottle.backend.smolmachines.sidecar_bundle import (
     BundleLaunchSpec,
+    allocate_raw_host_ports,
     bundle_container_name,
     bundle_network_name,
-    create_bundle_network,
     ensure_bundle_image,
-    remove_bundle_network,
+    start_bundle_vm,
-    start_bundle,
+    stop_bundle_vm,
-    stop_bundle,
 )
 
 
-def _ok(stdout: str = "", stderr: str = "") -> subprocess.CompletedProcess:  # type: ignore
-    return subprocess.CompletedProcess(
-        args=[], returncode=0, stdout=stdout, stderr=stderr,
-    )
-
-
-def _fail(stderr: str = "boom") -> subprocess.CompletedProcess:  # type: ignore
-    return subprocess.CompletedProcess(
-        args=[], returncode=1, stdout="", stderr=stderr,
-    )
-
-
 def _spec(**kwargs) -> BundleLaunchSpec:  # type: ignore
     defaults = dict(
         slug="demo-abc12",
@@ -68,123 +50,6 @@ class TestNamingHelpers(unittest.TestCase):
         )
 
 
-class TestNetworkLifecycle(unittest.TestCase):
-    def _patch_run(self, **kwargs):  # type: ignore
-        return patch(
-            "bot_bottle.backend.smolmachines.sidecar_bundle.subprocess.run",
-            **kwargs,
-        )
-
-    def test_create_argv_explicit_subnet_and_gateway(self):
-        with self._patch_run(return_value=_ok()) as m:
-            create_bundle_network("nn", "192.168.50.0/24", "192.168.50.1")
-        self.assertEqual(
-            ["docker", "network", "create",
-             "--subnet", "192.168.50.0/24",
-             "--gateway", "192.168.50.1",
-             "nn"],
-            m.call_args.args[0],
-        )
-
-    def test_create_treats_existing_network_as_success(self):
-        with self._patch_run(return_value=_fail("network nn already exists")):
-            # No SystemExit.
-            create_bundle_network("nn", "192.168.50.0/24", "192.168.50.1")
-
-    def test_create_other_failure_is_fatal(self):
-        with self._patch_run(return_value=_fail("invalid subnet")):
-            with self.assertRaises(SystemExit):
-                create_bundle_network("nn", "bogus", "bogus")
-
-    def test_remove_missing_network_is_idempotent(self):
-        # No SystemExit / no warn-and-continue noise; missing
-        # network is the expected case during a partial teardown.
-        with self._patch_run(return_value=_fail("Error: No such network: nn")):
-            remove_bundle_network("nn")
-
-    def test_remove_clean_returns_success(self):
-        with self._patch_run(return_value=_ok()):
-            remove_bundle_network("nn")
-
-
-class TestStartBundle(unittest.TestCase):
-    def _patch_run(self):
-        return patch(
-            "bot_bottle.backend.smolmachines.sidecar_bundle.subprocess.run",
-            return_value=_ok(),
-        )
-
-    def test_argv_pins_ip_on_network(self):
-        with self._patch_run() as m:
-            start_bundle(_spec())
-        argv = m.call_args.args[0]
-        # --network NETNAME --ip <bundle-ip> on the docker run.
-        self.assertIn("--network", argv)
-        self.assertIn("bot-bottle-bundle-demo-abc12", argv)
-        self.assertIn("--ip", argv)
-        self.assertIn("192.168.50.2", argv)
-        # Detached and auto-removed.
-        self.assertIn("--detach", argv)
-        self.assertIn("--rm", argv)
-        # Container name uses the per-slug bundle prefix.
-        i = argv.index("--name")
-        self.assertEqual("bot-bottle-sidecars-demo-abc12", argv[i + 1])
-        # Image at the end.
-        self.assertEqual("bot-bottle-sidecars:latest", argv[-1])
-
-    def test_daemons_env_passed_in(self):
-        with self._patch_run() as m:
-            start_bundle(_spec(daemons_csv="egress,supervise"))
-        argv = m.call_args.args[0]
-        self.assertIn("-e", argv)
-        self.assertIn(
-            "BOT_BOTTLE_SIDECAR_DAEMONS=egress,supervise",
-            argv,
-        )
-
-    def test_environment_entries_pass_through(self):
-        with self._patch_run() as m:
-            start_bundle(_spec(environment=(
-                "SUPERVISE_BOTTLE_SLUG=demo-abc12",
-                "EGRESS_TOKEN_0",  # bare-name → host env inherit
-            )))
-        argv = m.call_args.args[0]
-        self.assertIn("SUPERVISE_BOTTLE_SLUG=demo-abc12", argv)
-        self.assertIn("EGRESS_TOKEN_0", argv)
-
-    def test_volumes_render_with_ro_flag(self):
-        with self._patch_run() as m:
-            start_bundle(_spec(volumes=(
-                ("/host/egress-ca.pem", "/home/mitmproxy/.mitmproxy/mitmproxy-ca.pem", True),
-                ("/host/queue", "/run/supervise/queue", False),
-            )))
-        argv = m.call_args.args[0]
-        self.assertIn(
-            "/host/egress-ca.pem:/home/mitmproxy/.mitmproxy/mitmproxy-ca.pem:ro",
-            argv,
-        )
-        self.assertIn("/host/queue:/run/supervise/queue", argv)
-
-    def test_failure_dies(self):
-        with patch(
-            "bot_bottle.backend.smolmachines.sidecar_bundle.subprocess.run",
-            return_value=_fail("invalid mount"),
-        ):
-            with self.assertRaises(SystemExit):
-                start_bundle(_spec())
-
-    def test_host_env_inherited_to_subprocess(self):
-        # Bare-name entries in spec.environment rely on the docker
-        # subprocess being run with the host env. Confirm `env=`
-        # threads through.
-        with patch(
-            "bot_bottle.backend.smolmachines.sidecar_bundle.subprocess.run",
-            return_value=_ok(),
-        ) as m:
-            start_bundle(_spec(), env={"FOO": "bar"})
-        self.assertEqual({"FOO": "bar"}, m.call_args.kwargs["env"])
-
-
 class TestEnsureBundleImage(unittest.TestCase):
     def test_builds_sidecar_dockerfile_before_plain_docker_run(self):
         with patch(
@@ -200,26 +65,97 @@ class TestEnsureBundleImage(unittest.TestCase):
         self.assertEqual("Dockerfile.sidecars", kwargs["dockerfile"])
 
 
-class TestStopBundle(unittest.TestCase):
+class TestStartBundleVm(unittest.TestCase):
-    def _patch_run(self, **kwargs):  # type: ignore
+    def test_allocate_raw_host_ports_returns_bindable_ports(self):
-        return patch(
+        raw_ports = allocate_raw_host_ports((9099, 9420))
-            "bot_bottle.backend.smolmachines.sidecar_bundle.subprocess.run",
-            **kwargs,
-        )
 
-    def test_argv_force_removes(self):
+        self.assertEqual({9099, 9420}, set(raw_ports))
-        with self._patch_run(return_value=_ok()) as m:
+        for host_port in raw_ports.values():
-            stop_bundle("demo-abc12")
+            self.assertIsInstance(host_port, int)
+            self.assertGreater(host_port, 0)
+        self.assertNotEqual(raw_ports[9099], raw_ports[9420])
+
+    def test_creates_sidecar_vm_with_ports_volumes_and_env(self):
+        calls: list[tuple[str, tuple[object, ...], dict[str, object]]] = []
+
+        def record(name):  # type: ignore
+            def inner(*args, **kwargs):  # type: ignore
+                calls.append((name, args, kwargs))
+            return inner
+
+        with patch(
+            "bot_bottle.backend.smolmachines.sidecar_bundle.allocate_raw_host_ports",
+            return_value={9099: 55001, 9420: 55002},
+        ), patch(
+            "bot_bottle.backend.smolmachines.sidecar_bundle._smolvm.machine_create",
+            side_effect=record("create"),
+        ), patch(
+            "bot_bottle.backend.smolmachines.sidecar_bundle._smolvm.machine_start",
+            side_effect=record("start"),
+        ), patch(
+            "bot_bottle.backend.smolmachines.sidecar_bundle._smolvm.wait_exec_ready",
+            side_effect=record("wait"),
+        ):
+            launch = start_bundle_vm(
+                _spec(
+                    daemons_csv="egress,git-http",
+                    environment=("FOO=bar", "TOKEN"),
+                    volumes=(("/host/routes", "/etc/egress", True),),
+                    ports_to_publish=(9099, 9420),
+                ),
+                from_path=Path("/cache/sidecar.smolmachine"),
+                host_env={"TOKEN": "secret"},
+            )
+
+        self.assertEqual({9099: 55001, 9420: 55002}, launch.raw_ports)
+        create = calls[0]
+        self.assertEqual("create", create[0])
+        self.assertEqual(("bot-bottle-sidecars-demo-abc12",), create[1])
+        self.assertEqual(Path("/cache/sidecar.smolmachine"), create[2]["from_path"])
+        self.assertTrue(create[2]["net"])
+        self.assertEqual(((55001, 9099), (55002, 9420)), create[2]["ports"])
+        self.assertEqual((("/host/routes", "/etc/egress", True),), create[2]["volumes"])
         self.assertEqual(
-            ["docker", "rm", "-f", "bot-bottle-sidecars-demo-abc12"],
+            {
-            m.call_args.args[0],
+                "BOT_BOTTLE_SIDECAR_DAEMONS": "egress,git-http",
+                "FOO": "bar",
+                "TOKEN": "secret",
+            },
+            create[2]["env"],
         )
 
-    def test_missing_container_is_idempotent(self):
+
-        with self._patch_run(return_value=_fail(
+class TestStopBundleVm(unittest.TestCase):
-            "Error: No such container: bot-bottle-sidecars-demo-abc12"
+    def test_stops_then_deletes_sidecar_vm(self):
-        )):
+        with patch(
-            stop_bundle("demo-abc12")  # no raise
+            "bot_bottle.backend.smolmachines.sidecar_bundle._smolvm.machine_stop",
+        ) as stop, patch(
+            "bot_bottle.backend.smolmachines.sidecar_bundle._smolvm.machine_delete",
+        ) as delete:
+            stop_bundle_vm("demo-abc12")
+        stop.assert_called_once_with("bot-bottle-sidecars-demo-abc12")
+        delete.assert_called_once_with("bot-bottle-sidecars-demo-abc12")
+
+    def test_stop_and_delete_errors_are_warnings(self):
+        from bot_bottle.backend.smolmachines.smolvm import SmolvmError
+        result = subprocess.CompletedProcess(
+            args=[],
+            returncode=1,
+            stdout="",
+            stderr="failed",
+        )
+        with patch(
+            "bot_bottle.backend.smolmachines.sidecar_bundle._smolvm.machine_stop",
+            side_effect=SmolvmError(["smolvm", "machine", "stop"], result),
+        ), patch(
+            "bot_bottle.backend.smolmachines.sidecar_bundle._smolvm.machine_delete",
+            side_effect=SmolvmError(["smolvm", "machine", "delete"], result),
+        ), patch(
+            "bot_bottle.backend.smolmachines.sidecar_bundle.warn",
+        ) as warn:
+            stop_bundle_vm("demo-abc12")
+
+        self.assertEqual(2, warn.call_count)
 
 
 if __name__ == "__main__":

tests/unit/test_smolmachines_smolvm.py

@@ -79,7 +79,7 @@ class TestArgvShapes(unittest.TestCase):
         with self._patch_run() as m:
             machine_create("agent-xyz")
         self.assertEqual(
-            ["smolvm", "machine", "create", "agent-xyz"],
+            ["smolvm", "machine", "create", "--name", "agent-xyz"],
             m.call_args.args[0],
         )
 
@@ -103,7 +103,24 @@ class TestArgvShapes(unittest.TestCase):
         self.assertIn("192.168.50.2/32", argv)
         self.assertIn("-e", argv)
         self.assertIn("HTTPS_PROXY=http://192.168.50.2:8888", argv)
-        self.assertEqual("agent-xyz", argv[-1])
+        self.assertIn("--name", argv)
+        self.assertIn("agent-xyz", argv)
+
+    def test_machine_create_with_net_ports_and_volumes(self):
+        with self._patch_run() as m:
+            machine_create(
+                "sidecar-xyz",
+                from_path=Path("/stage/sidecar.smolmachine"),
+                net=True,
+                ports=((55000, 9099),),
+                volumes=(("/host/routes", "/etc/egress", True),),
+            )
+        argv = m.call_args.args[0]
+        self.assertIn("--net", argv)
+        self.assertIn("-p", argv)
+        self.assertIn("55000:9099", argv)
+        self.assertIn("-v", argv)
+        self.assertIn("/host/routes:/etc/egress:ro", argv)
 
     def test_machine_create_omits_net_when_no_allow_cidrs(self):
         with self._patch_run() as m:
@@ -127,13 +144,13 @@ class TestArgvShapes(unittest.TestCase):
             m.call_args.args[0],
         )
 
-    def test_machine_delete_uses_positional_name_and_force(self):
+    def test_machine_delete_uses_name_flag_and_force(self):
-        # delete NAME is positional; -f required so no interactive
+        # delete uses --name flag; -f required so no interactive
         # confirmation blocks teardown.
         with self._patch_run() as m:
             machine_delete("agent-xyz")
         self.assertEqual(
-            ["smolvm", "machine", "delete", "-f", "agent-xyz"],
+            ["smolvm", "machine", "delete", "--name", "agent-xyz", "-f"],
             m.call_args.args[0],
         )
 

tests/unit/test_smolmachines_util.py

@@ -56,9 +56,14 @@ class TestBundleSubnet(unittest.TestCase):
 
 class TestPreflight(unittest.TestCase):
     def test_smolvm_present_returns_none(self):
+        # Pin macOS so the Linux KVM gate doesn't fire on a CI runner
+        # (ubuntu, no /dev/kvm) — this test isolates the PATH check.
         with patch(
             "bot_bottle.backend.smolmachines.util.shutil.which",
             return_value="/usr/local/bin/smolvm",
+        ), patch(
+            "bot_bottle.backend.smolmachines.util.platform.system",
+            return_value="Darwin",
         ):
             self.assertIsNone(smolmachines_preflight())
 
@@ -88,5 +93,63 @@ class TestPreflight(unittest.TestCase):
             self.assertIn("BOT_BOTTLE_BACKEND=docker", msg)
 
 
+class TestKvmPreflight(unittest.TestCase):
+    """Linux-only KVM gate: smolvm needs /dev/kvm present and
+    accessible. macOS skips this entirely (Hypervisor.framework)."""
+
+    def _run(self, *, system: str, exists: bool, access: bool) -> None:
+        with patch(
+            "bot_bottle.backend.smolmachines.util.shutil.which",
+            return_value="/usr/bin/smolvm",
+        ), patch(
+            "bot_bottle.backend.smolmachines.util.platform.system",
+            return_value=system,
+        ), patch(
+            "bot_bottle.backend.smolmachines.util.os.path.exists",
+            return_value=exists,
+        ), patch(
+            "bot_bottle.backend.smolmachines.util.os.access",
+            return_value=access,
+        ):
+            return smolmachines_preflight()
+
+    def test_macos_skips_kvm_check(self):
+        # Even with /dev/kvm absent, macOS must not run the gate.
+        self.assertIsNone(self._run(system="Darwin", exists=False, access=False))
+
+    def test_linux_ok_returns_none(self):
+        self.assertIsNone(self._run(system="Linux", exists=True, access=True))
+
+    def test_linux_missing_device_dies(self):
+        with self.assertRaises(SystemExit):
+            self._run(system="Linux", exists=False, access=False)
+
+    def test_linux_no_access_dies(self):
+        with self.assertRaises(SystemExit):
+            self._run(system="Linux", exists=True, access=False)
+
+    def test_linux_missing_device_message(self):
+        import io
+        import sys
+        captured = io.StringIO()
+        with patch.object(sys, "stderr", captured):
+            with self.assertRaises(SystemExit):
+                self._run(system="Linux", exists=False, access=False)
+        msg = captured.getvalue()
+        self.assertIn("/dev/kvm", msg)
+        self.assertIn("kvm-intel", msg)
+
+    def test_linux_no_access_message(self):
+        import io
+        import sys
+        captured = io.StringIO()
+        with patch.object(sys, "stderr", captured):
+            with self.assertRaises(SystemExit):
+                self._run(system="Linux", exists=True, access=False)
+        msg = captured.getvalue()
+        self.assertIn("kvm", msg)
+        self.assertIn("group", msg)
+
+
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_supervise.py

@@ -1,6 +1,5 @@
 """Unit: supervise queue + audit log + diff helpers (PRD 0013)."""
 
-import json
 import tempfile
 import threading
 import time
@@ -9,6 +8,9 @@ from datetime import datetime, timezone
 from pathlib import Path
 
 from bot_bottle import supervise
+from bot_bottle import supervise_types as sv_types
+from bot_bottle.audit_store import AuditStore
+from bot_bottle.queue_store import QueueStore
 from bot_bottle.supervise import (
     AuditEntry,
     Proposal,
@@ -19,7 +21,7 @@ from bot_bottle.supervise import (
     TOOL_EGRESS_ALLOW,
     TOOL_GITLEAKS_ALLOW,
     archive_proposal,
-    audit_log_path,
+    host_db_path,
     list_pending_proposals,
     read_audit_entries,
     read_proposal,
@@ -112,32 +114,52 @@ class TestResponseRoundtrip(unittest.TestCase):
 class TestQueueIO(unittest.TestCase):
     def setUp(self):
         self._tmp = tempfile.TemporaryDirectory(prefix="bot-bottle-supervise-test.")
-        self.queue_dir = Path(self._tmp.name)
+        self._home_patch = self._patch_home(Path(self._tmp.name))
+        self.slug = "dev"
+        QueueStore("").migrate()
 
     def tearDown(self):
+        self._home_patch()
         self._tmp.cleanup()
 
+    def _patch_home(self, fake_home: Path):
+        original_sv = supervise.bot_bottle_root
+        original_svt = sv_types.bot_bottle_root
+
+        def fake_root() -> Path:
+            return fake_home / ".bot-bottle"
+
+        supervise.bot_bottle_root = fake_root  # type: ignore[assignment]
+        sv_types.bot_bottle_root = fake_root  # type: ignore[assignment]
+
+        def restore() -> None:
+            supervise.bot_bottle_root = original_sv  # type: ignore[assignment]
+            sv_types.bot_bottle_root = original_svt  # type: ignore[assignment]
+
+        return restore
+
     def test_write_and_read_proposal(self):
         p = _proposal()
-        path = write_proposal(self.queue_dir, p)
+        path = write_proposal(p)
         self.assertTrue(path.exists())
+        self.assertEqual(host_db_path(), path)
         self.assertEqual(0o600, path.stat().st_mode & 0o777)
-        loaded = read_proposal(self.queue_dir, p.id)
+        loaded = read_proposal(self.slug, p.id)
         self.assertEqual(p, loaded)
 
     def test_list_pending_excludes_responded(self):
         a = _proposal(justification="first")
         b = _proposal(justification="second")
-        write_proposal(self.queue_dir, a)
+        write_proposal(a)
-        write_proposal(self.queue_dir, b)
+        write_proposal(b)
-        write_response(self.queue_dir, Response(
+        write_response(self.slug, Response(
             proposal_id=a.id, status=STATUS_APPROVED, notes="",
         ))
-        pending = list_pending_proposals(self.queue_dir)
+        pending = list_pending_proposals(self.slug)
         self.assertEqual([b.id], [p.id for p in pending])
 
-    def test_list_pending_returns_empty_for_missing_dir(self):
+    def test_list_pending_returns_empty_for_missing_slug(self):
-        self.assertEqual([], list_pending_proposals(self.queue_dir / "nope"))
+        self.assertEqual([], list_pending_proposals("nope"))
 
     def test_list_pending_sorted_by_arrival(self):
         # Fabricate two with explicit timestamps.
@@ -154,30 +176,30 @@ class TestQueueIO(unittest.TestCase):
             now=datetime(2026, 5, 25, 14, 0, 0, tzinfo=timezone.utc),
         )
         # Write in reverse order.
-        write_proposal(self.queue_dir, b)
+        write_proposal(b)
-        write_proposal(self.queue_dir, a)
+        write_proposal(a)
-        ordered = list_pending_proposals(self.queue_dir)
+        ordered = list_pending_proposals(self.slug)
         self.assertEqual([a.id, b.id], [p.id for p in ordered])
 
     def test_write_and_read_response(self):
         r = Response(proposal_id="xyz", status=STATUS_REJECTED, notes="no")
-        write_response(self.queue_dir, r)
+        write_response(self.slug, r)
-        self.assertEqual(r, read_response(self.queue_dir, "xyz"))
+        self.assertEqual(r, read_response(self.slug, "xyz"))
 
     def test_wait_for_response_returns_when_file_appears(self):
         p = _proposal()
-        write_proposal(self.queue_dir, p)
+        write_proposal(p)
 
         def write_after_delay():
             time.sleep(0.05)
-            write_response(self.queue_dir, Response(
+            write_response(self.slug, Response(
                 proposal_id=p.id, status=STATUS_APPROVED, notes="ok",
             ))
 
         t = threading.Thread(target=write_after_delay)
         t.start()
         try:
-            r = wait_for_response(self.queue_dir, p.id, poll_interval=0.01)
+            r = wait_for_response(self.slug, p.id, poll_interval=0.01)
         finally:
             t.join()
         self.assertEqual(STATUS_APPROVED, r.status)
@@ -187,44 +209,51 @@ class TestQueueIO(unittest.TestCase):
         deadline = time.monotonic() + 0.05
         with self.assertRaises(TimeoutError):
             wait_for_response(
-                self.queue_dir, "never",
+                self.slug, "never",
                 poll_interval=0.01, deadline=deadline,
             )
 
-    def test_archive_proposal_moves_both_files(self):
+    def test_archive_proposal_hides_rows(self):
         p = _proposal()
-        write_proposal(self.queue_dir, p)
+        write_proposal(p)
-        write_response(self.queue_dir, Response(
+        write_response(self.slug, Response(
             proposal_id=p.id, status=STATUS_APPROVED, notes="",
         ))
-        archive_proposal(self.queue_dir, p.id)
+        archive_proposal(self.slug, p.id)
-        self.assertFalse((self.queue_dir / f"{p.id}.proposal.json").exists())
+        self.assertEqual([], list_pending_proposals(self.slug))
-        self.assertFalse((self.queue_dir / f"{p.id}.response.json").exists())
+        with self.assertRaises(FileNotFoundError):
-        self.assertTrue((self.queue_dir / "processed" / f"{p.id}.proposal.json").exists())
+            read_response(self.slug, p.id)
-        self.assertTrue((self.queue_dir / "processed" / f"{p.id}.response.json").exists())
 
     def test_archive_is_idempotent_on_missing_files(self):
         # Should not raise.
-        archive_proposal(self.queue_dir, "nope")
+        archive_proposal(self.slug, "nope")
 
 
 class TestAuditLog(unittest.TestCase):
     def setUp(self):
         self._tmp = tempfile.TemporaryDirectory(prefix="bot-bottle-supervise-audit.")
         self._home_patch = self._patch_home(Path(self._tmp.name))
+        AuditStore().migrate()
 
     def tearDown(self):
         self._home_patch()
         self._tmp.cleanup()
 
     def _patch_home(self, fake_home: Path):
-        original = supervise.bot_bottle_root
+        original_sv = supervise.bot_bottle_root
+        original_svt = sv_types.bot_bottle_root
 
         def fake_root() -> Path:
             return fake_home / ".bot-bottle"
 
         supervise.bot_bottle_root = fake_root  # type: ignore[assignment]
-        return lambda: setattr(supervise, "bot_bottle_root", original)
+        sv_types.bot_bottle_root = fake_root  # type: ignore[assignment]
+
+        def restore() -> None:
+            supervise.bot_bottle_root = original_sv  # type: ignore[assignment]
+            sv_types.bot_bottle_root = original_svt  # type: ignore[assignment]
+
+        return restore
 
     def test_write_then_read_single_entry(self):
         e = AuditEntry(
@@ -237,6 +266,7 @@ class TestAuditLog(unittest.TestCase):
             diff="--- before\n+++ after\n",
         )
         path = write_audit_entry(e)
+        self.assertEqual(host_db_path(), path)
         self.assertEqual(0o600, path.stat().st_mode & 0o777)
         loaded = read_audit_entries("cred-proxy", "dev")
         self.assertEqual([e], loaded)
@@ -252,12 +282,13 @@ class TestAuditLog(unittest.TestCase):
                 justification="",
                 diff="",
             ))
-        path = audit_log_path("egress", "dev")
+        entries = read_audit_entries("egress", "dev")
-        with path.open() as f:
+        self.assertEqual(3, len(entries))
-            lines = [line for line in f if line.strip()]
+        self.assertEqual(
-        self.assertEqual(3, len(lines))
+            ["2026-05-25T12:00:00+00:00", "2026-05-25T12:00:01+00:00",
-        for line in lines:
+             "2026-05-25T12:00:02+00:00"],
-            self.assertTrue(json.loads(line))  # each line is valid JSON
+            [entry.timestamp for entry in entries],
+        )
 
     def test_separate_logs_per_component_slug(self):
         write_audit_entry(AuditEntry(
@@ -369,17 +400,24 @@ class TestSupervisePrepare(unittest.TestCase):
         self._tmp.cleanup()
 
     def _patch_home(self, fake_home: Path):
-        original = supervise.bot_bottle_root
+        original_sv = supervise.bot_bottle_root
+        original_svt = sv_types.bot_bottle_root
 
         def fake_root() -> Path:
             return fake_home / ".bot-bottle"
 
         supervise.bot_bottle_root = fake_root  # type: ignore[assignment]
-        return lambda: setattr(supervise, "bot_bottle_root", original)
+        sv_types.bot_bottle_root = fake_root  # type: ignore[assignment]
+
+        def restore() -> None:
+            supervise.bot_bottle_root = original_sv  # type: ignore[assignment]
+            sv_types.bot_bottle_root = original_svt  # type: ignore[assignment]
+
+        return restore
 
     def test_prepare_creates_queue(self):
         plan = _StubSupervise().prepare("dev", self.stage_dir)
-        self.assertTrue(plan.queue_dir.is_dir())
+        self.assertTrue(plan.db_path.is_file())
         self.assertEqual("dev", plan.slug)
         self.assertEqual("", plan.internal_network)
 

tests/unit/test_supervise_cli.py

@@ -12,7 +12,10 @@ from pathlib import Path
 from unittest.mock import patch
 
 from bot_bottle import supervise
+from bot_bottle import supervise_types as sv_types
+from bot_bottle.audit_store import AuditStore
 from bot_bottle.cli import supervise as supervise_cli
+from bot_bottle.queue_store import QueueStore
 from bot_bottle.supervise import (
     Proposal,
     STATUS_APPROVED,
@@ -52,13 +55,22 @@ class _FakeHomeMixin:
 
     def _setup_fake_home(self):
         self._tmp = tempfile.TemporaryDirectory(prefix="supervise-test.")
-        original = supervise.bot_bottle_root
+        original_sv = supervise.bot_bottle_root
+        original_svt = sv_types.bot_bottle_root
 
         def fake_root() -> Path:
             return Path(self._tmp.name) / ".bot-bottle"
 
         supervise.bot_bottle_root = fake_root  # type: ignore[assignment]
-        self._restore_home = lambda: setattr(supervise, "bot_bottle_root", original)
+        sv_types.bot_bottle_root = fake_root  # type: ignore[assignment]
+
+        def restore() -> None:
+            supervise.bot_bottle_root = original_sv  # type: ignore[assignment]
+            sv_types.bot_bottle_root = original_svt  # type: ignore[assignment]
+
+        self._restore_home = restore
+        QueueStore("").migrate()
+        AuditStore().migrate()
 
     def _teardown_fake_home(self):
         self._restore_home()
@@ -77,9 +89,7 @@ class TestDiscoverPending(_FakeHomeMixin, unittest.TestCase):
 
     def test_walks_all_slug_subdirs(self):
         for slug in ("dev", "api"):
-            qdir = supervise.queue_dir_for_slug(slug)
+            supervise.write_proposal(_proposal(slug=slug))
-            qdir.mkdir(parents=True)
-            supervise.write_proposal(qdir, _proposal(slug=slug))
         pending = supervise_cli.discover_pending()
         self.assertEqual({"dev", "api"}, {qp.proposal.bottle_slug for qp in pending})
 
@@ -97,18 +107,14 @@ class TestDiscoverPending(_FakeHomeMixin, unittest.TestCase):
             now=datetime(2026, 5, 25, 14, 0, 0, tzinfo=timezone.utc),
         )
         for p in (late, early):
-            qdir = supervise.queue_dir_for_slug(p.bottle_slug)
+            supervise.write_proposal(p)
-            qdir.mkdir(parents=True, exist_ok=True)
-            supervise.write_proposal(qdir, p)
         pending = supervise_cli.discover_pending()
         self.assertEqual([early.id, late.id], [qp.proposal.id for qp in pending])
 
     def test_excludes_already_responded(self):
         p = _proposal()
-        qdir = supervise.queue_dir_for_slug("dev")
+        supervise.write_proposal(p)
-        qdir.mkdir(parents=True)
+        supervise.write_response("dev", supervise.Response(
-        supervise.write_proposal(qdir, p)
-        supervise.write_response(qdir, supervise.Response(
             proposal_id=p.id, status=STATUS_APPROVED, notes="",
         ))
         self.assertEqual([], supervise_cli.discover_pending())
@@ -123,10 +129,8 @@ class TestApproveReject(_FakeHomeMixin, unittest.TestCase):
 
     def _enqueue(self, tool: str = TOOL_EGRESS_ALLOW):
         p = _proposal(tool=tool)
-        qdir = supervise.queue_dir_for_slug("dev")
+        supervise.write_proposal(p)
-        qdir.mkdir(parents=True, exist_ok=True)
+        return supervise_cli.QueuedProposal(proposal=p)
-        supervise.write_proposal(qdir, p)
-        return supervise_cli.QueuedProposal(proposal=p, queue_dir=qdir)
 
     def test_approve_writes_response(self):
         qp = self._enqueue()
@@ -135,7 +139,7 @@ class TestApproveReject(_FakeHomeMixin, unittest.TestCase):
             return_value=("routes: []\n", "routes:\n  - host: example.com\n"),
         ):
             supervise_cli.approve(qp)
-        resp = read_response(qp.queue_dir, qp.proposal.id)
+        resp = read_response(qp.proposal.bottle_slug, qp.proposal.id)
         self.assertEqual(STATUS_APPROVED, resp.status)
         self.assertIsNone(resp.final_file)
 
@@ -150,7 +154,7 @@ class TestApproveReject(_FakeHomeMixin, unittest.TestCase):
                 final_file="routes:\n  - host: edited.example.com\n",
                 notes="tweaked",
             )
-        resp = read_response(qp.queue_dir, qp.proposal.id)
+        resp = read_response(qp.proposal.bottle_slug, qp.proposal.id)
         self.assertEqual(STATUS_MODIFIED, resp.status)
         self.assertEqual("routes:\n  - host: edited.example.com\n", resp.final_file)
         self.assertEqual("tweaked", resp.notes)
@@ -158,7 +162,7 @@ class TestApproveReject(_FakeHomeMixin, unittest.TestCase):
     def test_reject_writes_rejection(self):
         qp = self._enqueue()
         supervise_cli.reject(qp, reason="nope")
-        resp = read_response(qp.queue_dir, qp.proposal.id)
+        resp = read_response(qp.proposal.bottle_slug, qp.proposal.id)
         self.assertEqual(STATUS_REJECTED, resp.status)
         self.assertEqual("nope", resp.notes)
 
@@ -181,36 +185,33 @@ class TestApproveReject(_FakeHomeMixin, unittest.TestCase):
     def test_approve_gitleaks_allow_leaves_response_for_gate(self):
         qp = self._enqueue(tool=TOOL_GITLEAKS_ALLOW)
         supervise_cli.approve(qp, notes="dummy fixture")
-        # Gate polls the queue dir for the response; TUI must not archive it.
+        # Gate polls the DB for the response; TUI must not archive it.
-        resp = read_response(qp.queue_dir, qp.proposal.id)
+        resp = read_response(qp.proposal.bottle_slug, qp.proposal.id)
         self.assertEqual(STATUS_APPROVED, resp.status)
         self.assertEqual("dummy fixture", resp.notes)
-        self.assertFalse((qp.queue_dir / "processed").exists())
 
     def test_tui_gitleaks_allow_requires_reason(self):
         qp = self._enqueue(tool=TOOL_GITLEAKS_ALLOW)
         with patch.object(supervise_cli, "_prompt", return_value=""):
             status = supervise_cli._approve_from_tui(None, qp)  # type: ignore[arg-type]
         self.assertEqual("approve aborted (empty reason)", status)
-        self.assertFalse((qp.queue_dir / "processed").exists())
 
     def test_tui_gitleaks_allow_writes_reason(self):
         qp = self._enqueue(tool=TOOL_GITLEAKS_ALLOW)
         with patch.object(supervise_cli, "_prompt", return_value="test fixture"):
             status = supervise_cli._approve_from_tui(None, qp)  # type: ignore[arg-type]
         self.assertIn("approved gitleaks-allow", status)
-        resp = read_response(qp.queue_dir, qp.proposal.id)
+        resp = read_response(qp.proposal.bottle_slug, qp.proposal.id)
         self.assertEqual("test fixture", resp.notes)
 
     def test_approve_token_allow_leaves_response_for_egress(self):
         qp = self._enqueue(tool=TOOL_EGRESS_TOKEN_ALLOW)
         supervise_cli.approve(qp, notes="false positive")
-        # The egress addon polls the queue dir for the response; the TUI must
+        # The egress addon polls the DB for the response; the TUI must
         # not archive it (the addon archives after reading).
-        resp = read_response(qp.queue_dir, qp.proposal.id)
+        resp = read_response(qp.proposal.bottle_slug, qp.proposal.id)
         self.assertEqual(STATUS_APPROVED, resp.status)
         self.assertEqual("false positive", resp.notes)
-        self.assertFalse((qp.queue_dir / "processed").exists())
 
     def test_token_allow_writes_no_audit_log(self):
         qp = self._enqueue(tool=TOOL_EGRESS_TOKEN_ALLOW)
@@ -222,14 +223,13 @@ class TestApproveReject(_FakeHomeMixin, unittest.TestCase):
         with patch.object(supervise_cli, "_prompt", return_value=""):
             status = supervise_cli._approve_from_tui(None, qp)  # type: ignore[arg-type]
         self.assertEqual("approve aborted (empty reason)", status)
-        self.assertFalse((qp.queue_dir / "processed").exists())
 
     def test_tui_token_allow_writes_reason(self):
         qp = self._enqueue(tool=TOOL_EGRESS_TOKEN_ALLOW)
         with patch.object(supervise_cli, "_prompt", return_value="legit"):
             status = supervise_cli._approve_from_tui(None, qp)  # type: ignore[arg-type]
         self.assertIn("approved egress-token-allow", status)
-        resp = read_response(qp.queue_dir, qp.proposal.id)
+        resp = read_response(qp.proposal.bottle_slug, qp.proposal.id)
         self.assertEqual("legit", resp.notes)
 
     def test_suffix_for_token_allow_is_txt(self):

tests/unit/test_supervise_edge.py

@@ -4,7 +4,6 @@ fallback paths."""
 
 from __future__ import annotations
 
-import os
 import tempfile
 import time
 import unittest
@@ -12,14 +11,19 @@ from pathlib import Path
 from unittest.mock import patch
 
 from bot_bottle import supervise
+from bot_bottle.audit_store import AuditStore
+from bot_bottle.queue_store import QueueStore
 from bot_bottle.supervise import (
+    AuditEntry,
     Proposal,
+    STATUS_APPROVED,
     TOOL_EGRESS_ALLOW,
     list_pending_proposals,
     read_audit_entries,
     read_proposal,
     read_response,
     wait_for_response,
+    write_audit_entry,
 )
 
 
@@ -37,58 +41,59 @@ class TestPathHelpers(unittest.TestCase):
     def test_bot_bottle_root(self) -> None:
         self.assertTrue(str(supervise.bot_bottle_root()).endswith(".bot-bottle"))
 
-    def test_queue_dir_for_slug(self) -> None:
-        self.assertIn("slug", str(supervise.queue_dir_for_slug("slug")))
-
-    def test_id_from_non_proposal_filename(self) -> None:
-        self.assertIsNone(supervise._id_from_proposal_filename(Path("x.response.json")))
-
 
 class TestReadMalformed(unittest.TestCase):
-    def test_read_proposal_non_dict(self) -> None:
+    def test_read_proposal_missing_row(self) -> None:
         with tempfile.TemporaryDirectory() as d:
-            (Path(d) / "p.proposal.json").write_text("[]")
+            with patch.dict("os.environ", {"HOME": d}):
-            with self.assertRaises(ValueError):
+                QueueStore("slug").migrate()
-                read_proposal(Path(d), "p")
+                with self.assertRaises(FileNotFoundError):
+                    read_proposal("slug", "p")
 
-    def test_read_response_non_dict(self) -> None:
+    def test_read_response_missing_row(self) -> None:
         with tempfile.TemporaryDirectory() as d:
-            (Path(d) / "p.response.json").write_text("[]")
+            with patch.dict("os.environ", {"HOME": d}):
-            with self.assertRaises(ValueError):
+                QueueStore("slug").migrate()
-                read_response(Path(d), "p")
+                with self.assertRaises(FileNotFoundError):
+                    read_response("slug", "p")
 
-    def test_list_pending_skips_malformed(self) -> None:
+    def test_list_pending_reads_db_only(self) -> None:
         with tempfile.TemporaryDirectory() as d:
-            qd = Path(d)
+            with patch.dict("os.environ", {"HOME": d}):
-            (qd / "bad.proposal.json").write_text("{ not json")
+                QueueStore("slug").migrate()
-            (qd / "arr.proposal.json").write_text("[]")
+                supervise.write_proposal(_proposal())
-            (qd / "incomplete.proposal.json").write_text("{}")  # from_dict raises
+                pending = list_pending_proposals("slug")
-            supervise.write_proposal(qd, _proposal())  # one valid
-            pending = list_pending_proposals(qd)
             self.assertEqual(1, len(pending))
             self.assertEqual("slug", pending[0].bottle_slug)
 
     def test_list_pending_skips_when_response_present(self) -> None:
         with tempfile.TemporaryDirectory() as d:
-            qd = Path(d)
+            with patch.dict("os.environ", {"HOME": d}):
-            p = _proposal()
+                QueueStore("slug").migrate()
-            supervise.write_proposal(qd, p)
+                p = _proposal()
-            (qd / f"{p.id}.response.json").write_text("{}")  # response exists -> skipped
+                supervise.write_proposal(p)
-            self.assertEqual([], list_pending_proposals(qd))
+                supervise.write_response("slug", supervise.Response(
+                    proposal_id=p.id,
+                    status=STATUS_APPROVED,
+                    notes="",
+                ))
+                self.assertEqual([], list_pending_proposals("slug"))
 
 
 class TestWaitForResponse(unittest.TestCase):
-    def test_malformed_response_then_timeout(self) -> None:
+    def test_missing_response_times_out(self) -> None:
         with tempfile.TemporaryDirectory() as d:
-            (Path(d) / "p.response.json").write_text("{ not json")
+            with patch.dict("os.environ", {"HOME": d}):
-            with self.assertRaises(TimeoutError):
+                QueueStore("slug").migrate()
-                wait_for_response(Path(d), "p", deadline=time.monotonic())
+                with self.assertRaises(TimeoutError):
+                    wait_for_response("slug", "p", deadline=time.monotonic())
 
-    def test_incomplete_response_then_timeout(self) -> None:
+    def test_empty_db_response_does_not_count(self) -> None:
         with tempfile.TemporaryDirectory() as d:
-            (Path(d) / "p.response.json").write_text("{}")  # dict but from_dict raises
+            with patch.dict("os.environ", {"HOME": d}):
-            with self.assertRaises(TimeoutError):
+                QueueStore("slug").migrate()
-                wait_for_response(Path(d), "p", deadline=time.monotonic())
+                with self.assertRaises(TimeoutError):
+                    wait_for_response("slug", "p", deadline=time.monotonic())
 
 
 class TestReadAuditEntries(unittest.TestCase):
@@ -97,35 +102,102 @@ class TestReadAuditEntries(unittest.TestCase):
                 patch.dict("os.environ", {"HOME": home}):
             self.assertEqual([], read_audit_entries("egress", "nope"))
 
-    def test_skips_malformed_lines(self) -> None:
+    def test_reads_entries_from_db(self) -> None:
         with tempfile.TemporaryDirectory() as home, \
                 patch.dict("os.environ", {"HOME": home}):
-            path = supervise.audit_log_path("egress", "slug")
+            AuditStore().migrate()
-            path.parent.mkdir(parents=True, exist_ok=True)
+            write_audit_entry(AuditEntry(
-            valid = (
+                timestamp="t",
-                '{"timestamp": "t", "bottle_slug": "slug", "component": "egress",'
+                bottle_slug="slug",
-                ' "operator_action": "approve", "operator_notes": "",'
+                component="egress",
-                ' "justification": "", "diff": ""}'
+                operator_action="approve",
-            )
+                operator_notes="",
-            path.write_text(
+                justification="",
-                "\n"               # blank line skipped
+                diff="",
-                "{ not json\n"     # JSONDecodeError skipped
+            ))
-                "[]\n"             # not a dict skipped
+            write_audit_entry(AuditEntry(
-                "{}\n"             # missing fields -> ValueError skipped
+                timestamp="t",
-                + valid + "\n"
+                bottle_slug="other",
-            )
+                component="egress",
+                operator_action="reject",
+                operator_notes="",
+                justification="",
+                diff="",
+            ))
             entries = read_audit_entries("egress", "slug")
             self.assertEqual(1, len(entries))
             self.assertEqual("approve", entries[0].operator_action)
 
+    def test_legacy_audit_log_file_does_not_count(self) -> None:
+        with tempfile.TemporaryDirectory() as home, \
+                patch.dict("os.environ", {"HOME": home}):
+            path = supervise.audit_log_path("egress", "slug")
+            path.parent.mkdir(parents=True, exist_ok=True)
+            path.write_text(
+                '{"timestamp": "t", "bottle_slug": "slug", "component": "egress",'
+                ' "operator_action": "approve", "operator_notes": "",'
+                ' "justification": "", "diff": ""}\n'
+            )
+            entries = read_audit_entries("egress", "slug")
+            self.assertEqual([], entries)
 
-class TestFlockFallback(unittest.TestCase):
+
-    def test_flock_on_closed_fd_is_swallowed(self) -> None:
+class TestStoreGuardBranches(unittest.TestCase):
-        # flock on a closed fd raises OSError(EBADF), which the helpers swallow.
+    """Direct QueueStore / AuditStore construction and early-return guard branches."""
-        fd = os.open(os.devnull, os.O_RDONLY)
+
-        os.close(fd)
+    def test_queue_store_explicit_db_path(self):
-        supervise._try_flock(fd)
+        with tempfile.TemporaryDirectory() as d:
-        supervise._try_funlock(fd)
+            db = Path(d) / "q.db"
+            store = QueueStore("key", db_path=db)
+            store.migrate()
+            self.assertTrue(db.is_file())
+            self.assertEqual(db, store.db_path)
+
+    def test_queue_store_missing_db_list_pending_returns_empty(self):
+        with tempfile.TemporaryDirectory() as d:
+            db = Path(d) / "q.db"
+            store = QueueStore("key", db_path=db)
+            store.migrate()
+            db.unlink()
+            self.assertEqual([], store.list_pending_proposals())
+
+    def test_queue_store_missing_db_list_all_returns_empty(self):
+        with tempfile.TemporaryDirectory() as d:
+            db = Path(d) / "q.db"
+            store = QueueStore("key", db_path=db)
+            store.migrate()
+            db.unlink()
+            self.assertEqual([], store.list_all_pending_proposals())
+
+    def test_queue_store_missing_db_archive_is_noop(self):
+        with tempfile.TemporaryDirectory() as d:
+            db = Path(d) / "q.db"
+            store = QueueStore("key", db_path=db)
+            store.migrate()
+            db.unlink()
+            store.archive_proposal("anything")  # must not raise
+
+    def test_queue_store_chmod_oserror_is_swallowed(self):
+        with tempfile.TemporaryDirectory() as d:
+            db = Path(d) / "q.db"
+            store = QueueStore("key", db_path=db)
+            with patch("pathlib.Path.chmod", side_effect=OSError("ro")):
+                store.migrate()  # must not raise
+
+    def test_audit_store_missing_db_read_returns_empty(self):
+        with tempfile.TemporaryDirectory() as d:
+            db = Path(d) / "a.db"
+            store = AuditStore(db_path=db)
+            store.migrate()
+            db.unlink()
+            self.assertEqual([], store.read_audit_entries("egress", "slug"))
+
+    def test_audit_store_chmod_oserror_is_swallowed(self):
+        with tempfile.TemporaryDirectory() as d:
+            db = Path(d) / "a.db"
+            store = AuditStore(db_path=db)
+            with patch("pathlib.Path.chmod", side_effect=OSError("ro")):
+                store.migrate()  # must not raise
 
 
 if __name__ == "__main__":

tests/unit/test_supervise_server.py

@@ -17,8 +17,12 @@ from unittest.mock import patch
 # bare name `supervise`.
 sys.path.insert(0, str(Path(__file__).resolve().parent.parent.parent / "bot_bottle"))
 import supervise as _sv  # noqa: E402  # type: ignore
+import queue_store as _qs  # noqa: E402  # type: ignore
+import audit_store as _as  # noqa: E402  # type: ignore
+import supervise_types as svt_flat  # noqa: E402  # type: ignore
 
 from bot_bottle import supervise_server  # noqa: E402
+from bot_bottle import supervise_types as svt_pkg  # noqa: E402
 from bot_bottle.supervise_server import (
     ERR_INTERNAL,
     ERR_INVALID_PARAMS,
@@ -112,7 +116,7 @@ class TestRpcErrorTaxonomy(unittest.TestCase):
             validate_proposed_file(_sv.TOOL_EGRESS_ALLOW, "routes: nope\n")
 
     def test_unknown_tool_in_tools_call_is_client_error(self):
-        config = ServerConfig(bottle_slug="dev", queue_dir=Path("/unused"))
+        config = ServerConfig(bottle_slug="dev")
         with self.assertRaises(_RpcClientError) as cm:
             handle_tools_call({"name": "no-such-tool", "arguments": {}}, config)
         self.assertEqual(ERR_INVALID_PARAMS, cm.exception.code)
@@ -122,9 +126,9 @@ class TestRpcInternalErrorOnIoFailure(unittest.TestCase):
     def test_write_proposal_os_error_raises_internal(self):
         config = ServerConfig(
             bottle_slug="dev",
-            queue_dir=Path("/dev/null/cannot-exist"),
         )
-        with self.assertRaises(_RpcInternalError) as cm:
+        with patch.object(_sv, "write_proposal", side_effect=OSError("disk full")), \
+                self.assertRaises(_RpcInternalError) as cm:
             handle_tools_call(
                 {
                     "name": _sv.TOOL_EGRESS_ALLOW,
@@ -265,21 +269,43 @@ class TestHandleToolsList(unittest.TestCase):
 class TestHandleToolsCall(unittest.TestCase):
     def setUp(self):
         self._tmp = tempfile.TemporaryDirectory(prefix="supervise-server-test.")
-        self.queue_dir = Path(self._tmp.name)
+        self._home_patch = self._patch_home(Path(self._tmp.name))
-        self.config = ServerConfig(bottle_slug="dev", queue_dir=self.queue_dir)
+        self.config = ServerConfig(bottle_slug="dev")
+        _qs.QueueStore("dev").migrate()
+        _as.AuditStore().migrate()
 
     def tearDown(self):
+        self._home_patch()
         self._tmp.cleanup()
 
+    def _patch_home(self, fake_home: Path):
+        original_sv = _sv.bot_bottle_root
+        original_flat = svt_flat.bot_bottle_root
+        original_pkg = svt_pkg.bot_bottle_root
+
+        def fake_root() -> Path:
+            return fake_home / ".bot-bottle"
+
+        _sv.bot_bottle_root = fake_root  # type: ignore[assignment]
+        svt_flat.bot_bottle_root = fake_root  # type: ignore[assignment]
+        svt_pkg.bot_bottle_root = fake_root  # type: ignore[assignment]
+
+        def restore() -> None:
+            _sv.bot_bottle_root = original_sv  # type: ignore[assignment]
+            svt_flat.bot_bottle_root = original_flat  # type: ignore[assignment]
+            svt_pkg.bot_bottle_root = original_pkg  # type: ignore[assignment]
+
+        return restore
+
     def _respond_when_proposal_appears(self, status: str, notes: str = "") -> threading.Thread:
         """Background thread: poll the queue for a fresh proposal, write a
         matching response. Returns the thread so the test can join it."""
         def runner():
             for _ in range(200):
-                pending = _sv.list_pending_proposals(self.queue_dir)
+                pending = _sv.list_pending_proposals("dev")
                 if pending:
                     p = pending[0]
-                    _sv.write_response(self.queue_dir, _sv.Response(
+                    _sv.write_response("dev", _sv.Response(
                         proposal_id=p.id, status=status, notes=notes,
                     ))
                     return
@@ -412,15 +438,11 @@ class TestHandleToolsCall(unittest.TestCase):
         finally:
             responder.join()
         # No pending proposals left after archive.
-        self.assertEqual([], _sv.list_pending_proposals(self.queue_dir))
+        self.assertEqual([], _sv.list_pending_proposals("dev"))
-        # Both files moved to processed/.
-        processed = list((self.queue_dir / "processed").glob("*.json"))
-        self.assertEqual(2, len(processed))
 
     def test_pending_response_times_out_without_archive(self):
         config = ServerConfig(
             bottle_slug="dev",
-            queue_dir=self.queue_dir,
             response_timeout_seconds=0.05,
         )
         result = handle_tools_call(
@@ -438,8 +460,7 @@ class TestHandleToolsCall(unittest.TestCase):
         text = result["content"][0]["text"]  # type: ignore[index]
         self.assertIn("status: pending", text)
         self.assertIn("proposal remains queued", text)
-        self.assertEqual(1, len(_sv.list_pending_proposals(self.queue_dir)))
+        self.assertEqual(1, len(_sv.list_pending_proposals("dev")))
-        self.assertFalse((self.queue_dir / "processed").exists())
 
 
 class TestHandleListEgressRoutes(unittest.TestCase):
@@ -461,7 +482,7 @@ class TestHandleListEgressRoutes(unittest.TestCase):
         with patch.object(supervise_server.urllib.request, "build_opener", return_value=_Opener()):
             result = handle_list_egress_routes(
                 {},
-                ServerConfig(bottle_slug="dev", queue_dir=Path("/unused")),
+                ServerConfig(bottle_slug="dev"),
             )
 
         self.assertFalse(result["isError"])  # type: ignore[index]
@@ -476,7 +497,7 @@ class TestHandleListEgressRoutes(unittest.TestCase):
         with patch.object(supervise_server.urllib.request, "build_opener", return_value=_Opener()):
             result = handle_list_egress_routes(
                 {},
-                ServerConfig(bottle_slug="dev", queue_dir=Path("/unused")),
+                ServerConfig(bottle_slug="dev"),
             )
 
         self.assertTrue(result["isError"])  # type: ignore[index]
@@ -544,7 +565,6 @@ class TestHttpEndToEnd(unittest.TestCase):
 
     def setUp(self):
         self._tmp = tempfile.TemporaryDirectory(prefix="supervise-http-test.")
-        self.queue_dir = Path(self._tmp.name)
         # Pick a random port by binding to :0 first.
         import socket
         s = socket.socket()
@@ -552,7 +572,7 @@ class TestHttpEndToEnd(unittest.TestCase):
         self.port = s.getsockname()[1]
         s.close()
         self.server = MCPServer(("127.0.0.1", self.port), MCPHandler)
-        self.server.config = ServerConfig(bottle_slug="dev", queue_dir=self.queue_dir)
+        self.server.config = ServerConfig(bottle_slug="dev")
         self.thread = threading.Thread(
             target=self.server.serve_forever, daemon=True,
         )

tests/unit/test_yaml_subset.py

@@ -6,7 +6,7 @@ import textwrap
 import unittest
 
 from bot_bottle.yaml_subset import YamlSubsetError
-from bot_bottle.yaml_subset import parse_frontmatter, parse_yaml_subset
+from bot_bottle.yaml_subset import parse_frontmatter, parse_yaml_subset, serialize_yaml_subset
 
 
 def _y(s: str):
@@ -457,5 +457,141 @@ class TestEdgeAndErrorBranches(unittest.TestCase):
         self.assertEqual(({}, ""), parse_frontmatter(""))
 
 
+# ---------------------------------------------------------------------------
+# serialize_yaml_subset
+# ---------------------------------------------------------------------------
+
+
+class TestSerializeYamlSubset(unittest.TestCase):
+    def _roundtrip(self, text: str) -> None:
+        """Parse then serialize then re-parse; result must equal original parse."""
+        parsed = parse_yaml_subset(text)
+        serialized = serialize_yaml_subset(parsed)
+        self.assertEqual(parsed, parse_yaml_subset(serialized))
+
+    # --- scalar values ---------------------------------------------------------
+
+    def test_string_bare(self) -> None:
+        self.assertEqual("key: value\n", serialize_yaml_subset({"key": "value"}))
+
+    def test_string_empty_is_quoted(self) -> None:
+        out = serialize_yaml_subset({"key": ""})
+        self.assertIn("key: ''", out)
+        self._roundtrip("key: ''\n")
+
+    def test_string_true_like_is_quoted(self) -> None:
+        out = serialize_yaml_subset({"key": "true"})
+        self.assertIn("'true'", out)
+        self.assertEqual({"key": "true"}, parse_yaml_subset(out))
+
+    def test_string_int_like_is_quoted(self) -> None:
+        out = serialize_yaml_subset({"key": "42"})
+        self.assertIn("'42'", out)
+        self.assertEqual({"key": "42"}, parse_yaml_subset(out))
+
+    def test_string_special_start_char_is_quoted(self) -> None:
+        for ch in ('"', "'", "[", "{", "!", "&", "*", "#", "|", ">"):
+            out = serialize_yaml_subset({"key": ch + "rest"})
+            self.assertIn("'", out, msg=f"expected quoting for {ch!r}")
+
+    def test_none_emits_null(self) -> None:
+        self.assertEqual("key: null\n", serialize_yaml_subset({"key": None}))
+
+    def test_bool_true(self) -> None:
+        self.assertEqual("key: true\n", serialize_yaml_subset({"key": True}))
+
+    def test_bool_false(self) -> None:
+        self.assertEqual("key: false\n", serialize_yaml_subset({"key": False}))
+
+    def test_int(self) -> None:
+        self.assertEqual("key: 42\n", serialize_yaml_subset({"key": 42}))
+
+    # --- nested dict -----------------------------------------------------------
+
+    def test_nested_dict(self) -> None:
+        data: dict[str, object] = {"outer": {"inner": "val"}}
+        out = serialize_yaml_subset(data)
+        self.assertIn("outer:", out)
+        self.assertIn("  inner: val", out)
+        self.assertEqual(data, parse_yaml_subset(out))
+
+    def test_empty_dict_value_inline(self) -> None:
+        out = serialize_yaml_subset({"key": {}})
+        self.assertIn("key: {}", out)
+
+    # --- lists -----------------------------------------------------------------
+
+    def test_list_of_scalars(self) -> None:
+        data: dict[str, object] = {"items": ["a", "b", "c"]}
+        out = serialize_yaml_subset(data)
+        self.assertEqual(data, parse_yaml_subset(out))
+
+    def test_empty_list_value_inline(self) -> None:
+        out = serialize_yaml_subset({"key": []})
+        self.assertIn("key: []", out)
+
+    def test_list_of_mappings(self) -> None:
+        data: dict[str, object] = {"items": [{"name": "alpha", "val": 1}, {"name": "beta", "val": 2}]}
+        out = serialize_yaml_subset(data)
+        self.assertEqual(data, parse_yaml_subset(out))
+
+    def test_list_item_mapping_with_nested_dict(self) -> None:
+        data: dict[str, object] = {"items": [{"name": "x", "sub": {"k": "v"}}]}
+        out = serialize_yaml_subset(data)
+        self.assertEqual(data, parse_yaml_subset(out))
+
+    def test_list_item_first_key_is_nested_dict(self) -> None:
+        # Covers the branch where the FIRST key of a mapping list item
+        # has a nested dict/list value (not a scalar).
+        data: dict[str, object] = {"items": [{"cfg": {"a": 1, "b": 2}, "name": "x"}]}
+        out = serialize_yaml_subset(data)
+        self.assertEqual(data, parse_yaml_subset(out))
+
+    def test_list_item_mapping_continuation_keys(self) -> None:
+        data: dict[str, object] = {"items": [{"a": 1, "b": 2, "c": 3}]}
+        out = serialize_yaml_subset(data)
+        self.assertEqual(data, parse_yaml_subset(out))
+
+    # --- empty / trivial -------------------------------------------------------
+
+    def test_empty_dict(self) -> None:
+        self.assertEqual("", serialize_yaml_subset({}))
+
+    # --- realistic bottle frontmatter round-trip --------------------------------
+
+    def test_bottle_frontmatter_round_trip(self) -> None:
+        text = textwrap.dedent("""\
+            git-gate:
+              repos:
+                myrepo:
+                  url: ssh://git@host/org/repo.git
+                  key:
+                    provider: static
+                    path: /dev/null
+        """)
+        self._roundtrip(text)
+
+    def test_host_key_inserted_at_repo_level(self) -> None:
+        """The canonical use-case: host_key lands as a sibling of url/key."""
+        from typing import cast
+        text = textwrap.dedent("""\
+            git-gate:
+              repos:
+                myrepo:
+                  url: ssh://git@host/org/repo.git
+                  key:
+                    provider: static
+                    path: /dev/null
+        """)
+        data = parse_yaml_subset(text)
+        repos = cast(dict[str, object], cast(dict[str, object], data["git-gate"])["repos"])
+        cast(dict[str, object], repos["myrepo"])["host_key"] = "ssh-ed25519 AAAA"
+        out = serialize_yaml_subset(data)
+        parsed_back = parse_yaml_subset(out)
+        repo = cast(dict[str, object], cast(dict[str, object], cast(dict[str, object], parsed_back["git-gate"])["repos"])["myrepo"])
+        self.assertEqual("ssh-ed25519 AAAA", repo["host_key"])
+        self.assertIn("provider", cast(dict[str, object], repo["key"]))
+
+
 if __name__ == "__main__":
     unittest.main()