refactor(supervise): make Supervisor a service class the orchestrator calls

Turn the loose queue/audit functions in orchestrator/supervisor/queue.py into
methods on a concrete Supervisor service. The Orchestrator now owns an
injectable `self._supervisor` and calls `self._supervisor.write_proposal(...)`
etc., instead of module-level free functions — the supervise dependency is
explicit and mockable, and a Supervisor can be scoped to a `db_path` (defaults
to the host DB) so tests can point it at a temp database.

  - Supervisor (in the package __init__) drops the ABC and gains write_proposal,
    read_proposal, list_pending_proposals, list_all_pending_proposals,
    write_response, read_response, archive_all_proposals, write_audit_entry,
    read_audit_entries, plus the launch-time prepare().
  - render_diff / sha256_hex are pure and stateless, so they move to
    orchestrator/supervisor/util.py (re-exported from the facade) rather than
    becoming methods.
  - queue.py is deleted; service.py + the supervise tests call through a
    Supervisor instance.

Full unit suite green (2243).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

bot_bottle/orchestrator/supervisor/__init__.py

@@ -1,52 +1,91 @@
-"""The orchestrator's view of the supervise plane.
+"""The orchestrator's supervise service.
 
-Bundles the orchestrator-owned supervise surface: the queue/audit I/O and diff
-rendering (`queue`), and the `Supervisor` lifecycle (host-side database
-staging). For convenience it re-exports the neutral vocabulary
-(`bot_bottle.supervisor`'s types + `SupervisePlan`) so orchestrator-side
-callers — service, CLI, tests — import from one place.
+`Supervisor` is the service object the `Orchestrator` owns and calls: it wraps
+the supervise queue + audit stores (queue proposals, record operator responses,
+write audit entries, stage the DB at launch). Binding those operations to one
+object — optionally scoped to a `db_path` — makes the orchestrator's supervise
+dependency explicit and injectable in tests.
 
-The data plane must NOT import this package; it imports `bot_bottle.supervisor`
-(neutral) directly and reaches the queue over the control-plane RPC.
+For convenience this package also re-exports the neutral vocabulary
+(`bot_bottle.supervisor`'s types + `SupervisePlan`) and the pure `render_diff`
+/ `sha256_hex` helpers (`util`), so orchestrator-side callers import from one
+place. The data plane must NOT import this package — it imports
+`bot_bottle.supervisor` (neutral) directly and reaches the queue over the
+control-plane RPC.
 """
 
 from __future__ import annotations
 
-from abc import ABC
 from pathlib import Path
 
 from ...supervisor.types import *  # noqa: F401,F403 — re-export the neutral vocabulary
 from ...supervisor.plan import SupervisePlan
 from ..store.store_manager import StoreManager
-from .queue import (
-    archive_all_proposals,
-    list_all_pending_proposals,
-    list_pending_proposals,
-    read_audit_entries,
-    read_proposal,
-    read_response,
-    render_diff,
-    sha256_hex,
-    write_audit_entry,
-    write_proposal,
-    write_response,
-)
+from ..store.queue_store import QueueStore
+from ...store.audit_store import AuditStore
+from ...supervisor.types import AuditEntry, Proposal, Response
+from .util import render_diff, sha256_hex  # noqa: F401 — re-exported for callers
 
 
-class Supervisor(ABC):
-    """Per-bottle supervise lifecycle. Encapsulates host-side database staging;
-    the gateway's start/stop lifecycle is backend-specific.
+class Supervisor:
+    """Host-side supervise service: the queue + audit I/O and launch-time DB
+    staging the orchestrator drives. Stateless apart from an optional `db_path`
+    (None → the host DB, resolved per store as before), so a test can point a
+    `Supervisor` at a temp database."""
 
-    `prepare` migrates the orchestrator's `bot-bottle.db` and returns the
-    neutral `SupervisePlan`. It touches the orchestrator store manager, so it
-    lives here rather than in the neutral `bot_bottle.supervisor` package; the
-    backend (which drives launch) may import it — backend → orchestrator is an
-    allowed direction, unlike gateway → orchestrator."""
+    def __init__(self, db_path: Path | None = None) -> None:
+        self._db_path = db_path
+
+    def _queue(self, queue_key: str) -> QueueStore:
+        return QueueStore(queue_key, self._db_path)
+
+    def _audit(self) -> AuditStore:
+        return AuditStore(self._db_path)
+
+    # --- Queue I/O ---------------------------------------------------------
+
+    def write_proposal(self, proposal: Proposal) -> Path:
+        """Persist `proposal` in the queue database, mode 0o600."""
+        return self._queue(proposal.bottle_slug).write_proposal(proposal)
+
+    def read_proposal(self, bottle_slug: str, proposal_id: str) -> Proposal:
+        return self._queue(bottle_slug).read_proposal(proposal_id)
+
+    def list_pending_proposals(self, bottle_slug: str) -> list[Proposal]:
+        """A single bottle's undecided proposals, FIFO by arrival."""
+        return self._queue(bottle_slug).list_pending_proposals()
+
+    def list_all_pending_proposals(self) -> list[Proposal]:
+        """All pending proposals across bottles, sorted FIFO."""
+        return self._queue("").list_all_pending_proposals()
+
+    def write_response(self, bottle_slug: str, response: Response) -> Path:
+        return self._queue(bottle_slug).write_response(response)
+
+    def read_response(self, bottle_slug: str, proposal_id: str) -> Response:
+        return self._queue(bottle_slug).read_response(proposal_id)
+
+    def archive_all_proposals(self, bottle_slug: str) -> None:
+        """Archive every proposal + response for `bottle_slug` (bottle teardown
+        / reconcile cleanup). Idempotent."""
+        self._queue(bottle_slug).archive_all()
+
+    # --- Audit log ---------------------------------------------------------
+
+    def write_audit_entry(self, entry: AuditEntry) -> Path:
+        """Append `entry` to the host supervise audit table."""
+        return self._audit().write_audit_entry(entry)
+
+    def read_audit_entries(self, component: str, slug: str) -> list[AuditEntry]:
+        """Load all audit entries for the given component+slug."""
+        return self._audit().read_audit_entries(component, slug)
+
+    # --- Launch-time staging ----------------------------------------------
 
     def prepare(self, slug: str, stage_dir: Path) -> SupervisePlan:
-        """Stage the host database. Returns the plan; `internal_network` must be
-        set by the launch step before .start runs."""
+        """Stage the host database and return the plan. Called by the backend at
+        launch; `internal_network` is set by the launch step before `.start`."""
         del stage_dir
-        mgr = StoreManager.instance()
+        mgr = StoreManager(self._db_path) if self._db_path else StoreManager.instance()
         mgr.migrate()
         return SupervisePlan(slug=slug, db_path=mgr.db_path)

bot_bottle/orchestrator/supervisor/queue.py

@@ -1,93 +0,0 @@
-"""Orchestrator-side supervise queue + audit I/O and diff rendering.
-
-The host-side library the orchestrator uses to drive the supervise flow: read /
-write proposals and responses against the queue store, append audit entries,
-and render operator diffs. Only the orchestrator opens `bot-bottle.db` (PRD
-0070), so this lives under `orchestrator/` — the data plane reaches it over the
-control-plane RPC, never by importing this module.
-"""
-
-from __future__ import annotations
-
-import difflib
-import hashlib
-from pathlib import Path
-
-from ...supervisor.types import AuditEntry, Proposal, Response
-from ..store.queue_store import QueueStore
-from ...store.audit_store import AuditStore
-
-
-# --- Queue I/O -------------------------------------------------------------
-
-
-def write_proposal(proposal: Proposal) -> Path:
-    """Persist `proposal` in the queue database, mode 0o600.
-    Directory is created if missing."""
-    return QueueStore(proposal.bottle_slug).write_proposal(proposal)
-
-
-def read_proposal(bottle_slug: str, proposal_id: str) -> Proposal:
-    return QueueStore(bottle_slug).read_proposal(proposal_id)
-
-
-def list_pending_proposals(bottle_slug: str) -> list[Proposal]:
-    """All proposals for `bottle_slug` that do not yet have a matching
-    response. Sorted by `arrival_timestamp` so the operator sees the queue
-    FIFO."""
-    return QueueStore(bottle_slug).list_pending_proposals()
-
-
-def list_all_pending_proposals() -> list[Proposal]:
-    """All pending proposals across bottles, sorted FIFO."""
-    return QueueStore("").list_all_pending_proposals()
-
-
-def write_response(bottle_slug: str, response: Response) -> Path:
-    return QueueStore(bottle_slug).write_response(response)
-
-
-def read_response(bottle_slug: str, proposal_id: str) -> Response:
-    return QueueStore(bottle_slug).read_response(proposal_id)
-
-
-def archive_all_proposals(bottle_slug: str) -> None:
-    """Archive every proposal + response for `bottle_slug` (bottle teardown /
-    reconcile cleanup). Idempotent."""
-    QueueStore(bottle_slug).archive_all()
-
-
-# --- Audit log -------------------------------------------------------------
-
-
-def write_audit_entry(entry: AuditEntry) -> Path:
-    """Append `entry` to the host supervise audit table."""
-    return AuditStore().write_audit_entry(entry)
-
-
-def read_audit_entries(component: str, slug: str) -> list[AuditEntry]:
-    """Load all audit entries for the given component+slug."""
-    return AuditStore().read_audit_entries(component, slug)
-
-
-# --- Diff rendering --------------------------------------------------------
-
-
-def render_diff(before: str, after: str, *, label: str = "config") -> str:
-    """Unified diff suitable for the audit log + TUI. Empty diff (no changes)
-    renders as the empty string."""
-    diff = difflib.unified_diff(
-        before.splitlines(keepends=True),
-        after.splitlines(keepends=True),
-        fromfile=f"{label} (current)",
-        tofile=f"{label} (proposed)",
-        lineterm="",
-    )
-    parts = list(diff)
-    if not parts:
-        return ""
-    return "".join(p if p.endswith("\n") else p + "\n" for p in parts).rstrip("\n")
-
-
-def sha256_hex(content: str) -> str:
-    return hashlib.sha256(content.encode("utf-8")).hexdigest()

bot_bottle/orchestrator/supervisor/util.py

@@ -0,0 +1,31 @@
+"""Pure supervise helpers — diff rendering and content hashing.
+
+Stateless utilities used alongside the `Supervisor` service. Kept as plain
+functions (not methods) because they carry no state and are also handy to
+callers that only need to hash or diff.
+"""
+
+from __future__ import annotations
+
+import difflib
+import hashlib
+
+
+def render_diff(before: str, after: str, *, label: str = "config") -> str:
+    """Unified diff suitable for the audit log + TUI. Empty diff (no changes)
+    renders as the empty string."""
+    diff = difflib.unified_diff(
+        before.splitlines(keepends=True),
+        after.splitlines(keepends=True),
+        fromfile=f"{label} (current)",
+        tofile=f"{label} (proposed)",
+        lineterm="",
+    )
+    parts = list(diff)
+    if not parts:
+        return ""
+    return "".join(p if p.endswith("\n") else p + "\n" for p in parts).rstrip("\n")
+
+
+def sha256_hex(content: str) -> str:
+    return hashlib.sha256(content.encode("utf-8")).hexdigest()