fix(codex): make host-credential bottles actually authenticate

Debugging a live codex smolmachines bottle surfaced three independent
failures past the sign-in screen; fix each so forward_host_credentials
works end to end:

- codex_auth: dummy access/id tokens now inherit the *real* host token's
  exp instead of now+1h. Codex (0.135) refreshes when its local token's
  JWT exp lapses; with a placeholder refresh_token that refresh fails and
  drops to the sign-in screen. Aligning exp tracks the real token's life.

- prepare: set CODEX_CA_CERTIFICATE to the agent CA bundle for codex
  bottles. Codex is rustls and ignores the system store / NODE_EXTRA_CA_
  CERTS; it reads CODEX_CA_CERTIFICATE (fallback SSL_CERT_FILE) for custom
  roots across HTTPS + wss, so it must be pointed at the egress MITM CA or
  injection can't work without tls_passthrough.

- pipelock: auto tls_passthrough the Codex API hosts when
  forward_host_credentials is on. Egress injects the bearer before
  pipelock, whose header DLP then flags the JWT ("request header contains
  secret") and the retry storm trips its 429. passthrough host-gates the
  CONNECT but skips decrypt+rescan of egress-owned auth. The auto-added
  routes aren't in bottle.egress.routes, so the hosts are added explicitly.

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

README.md

@@ -352,10 +352,15 @@ auth through egress and gitea.dideric.is over SSH.
 For a Codex-backed base bottle, set `agent_provider.template: codex`.
 The Codex template expects ChatGPT/device login state instead of an
 `OPENAI_API_KEY` env var; no API-key placeholder is forwarded into the
-agent. To let headless device-code login request a user code, add an
-unauthenticated egress route for the device-auth endpoint:
+agent. To let bot-bottle read the host's current Codex ChatGPT access
+token and inject it from egress only for Codex's API calls, opt in
+explicitly:
 
 ```yaml
+agent_provider:
+  template: codex
+  forward_host_credentials: true
+
 egress:
   routes:
     - host: auth.openai.com
@@ -363,6 +368,18 @@ egress:
         - /api/accounts/deviceauth/
 ```
 
+Run `codex login --device-auth` on the host before launch. The
+launcher reads `tokens.access_token` from the host's
+`~/.codex/auth.json`, verifies it is fresh user/device auth, and passes
+it to the sidecar's `EGRESS_TOKEN_N` env slot. The agent container gets
+a dummy `~/.codex/auth.json` that preserves the host auth-mode shape
+but replaces credential values with placeholders. It keeps the selected
+ChatGPT account id so Codex sends requests for the same account while
+egress owns the real bearer token. The agent never receives real access
+tokens, refresh tokens, or `OPENAI_API_KEY`. The effective egress table
+automatically adds or upgrades `api.openai.com` and `chatgpt.com` to
+authenticated routes when `forward_host_credentials` is true.
+
 The built-in Codex template uses `Dockerfile.codex`; set
 `agent_provider.dockerfile` to build the agent from a custom Dockerfile
 while keeping the bot-bottle sidecars in place.

bot_bottle/backend/__init__.py

@@ -286,6 +286,7 @@ class BottleBackend(ABC, Generic[PlanT, CleanupT]):
         intercepted without per-tool reconfiguration."""
         self.provision_ca(plan, target)
         prompt_path = self.provision_prompt(plan, target)
+        self.provision_provider_auth(plan, target)
         self.provision_skills(plan, target)
         self.provision_git(plan, target)
         self.provision_supervise(plan, target)
@@ -300,6 +301,11 @@ class BottleBackend(ABC, Generic[PlanT, CleanupT]):
         backend overrides to docker-cp the cert in and run
         `update-ca-certificates`."""
 
+    def provision_provider_auth(self, plan: PlanT, target: str) -> None:
+        """Install non-secret provider auth marker files into the agent
+        home when a provider needs them to select the right auth mode.
+        The default is no-op."""
+
     @abstractmethod
     def provision_prompt(self, plan: PlanT, target: str) -> str | None:
         """Copy the prompt file into the running bottle. Returns the

bot_bottle/backend/docker/backend.py

@@ -29,6 +29,7 @@ from .bottle_plan import DockerBottlePlan
 from .provision import ca as _ca
 from .provision import git as _git
 from .provision import prompt as _prompt
+from .provision import provider_auth as _provider_auth
 from .provision import skills as _skills
 from .provision import supervise as _supervise_prov
 
@@ -62,6 +63,9 @@ class DockerBottleBackend(BottleBackend["DockerBottlePlan", "DockerBottleCleanup
     def provision_prompt(self, plan: DockerBottlePlan, target: str) -> str | None:
         return _prompt.provision_prompt(plan, target)
 
+    def provision_provider_auth(self, plan: DockerBottlePlan, target: str) -> None:
+        _provider_auth.provision_provider_auth(plan, target)
+
     def provision_skills(self, plan: DockerBottlePlan, target: str) -> None:
         _skills.provision_skills(plan, target)
 

bot_bottle/backend/docker/bottle_plan.py

@@ -55,6 +55,7 @@ class DockerBottlePlan(BottlePlan):
     agent_command: str = "claude"
     agent_prompt_mode: PromptMode = "append_file"
     agent_provider_template: str = "claude"
+    codex_auth_file: Path | None = None
 
     def print(self, *, remote_control: bool) -> None:
         """Render the y/N preflight summary to stderr — compact form

bot_bottle/backend/docker/launch.py

@@ -42,7 +42,11 @@ from contextlib import ExitStack, contextmanager
 from pathlib import Path
 from typing import Callable, Generator
 
-from ...egress import egress_resolve_token_values
+from ...codex_auth import codex_host_access_token
+from ...egress import (
+    CODEX_HOST_CREDENTIAL_TOKEN_REF,
+    egress_resolve_token_values,
+)
 from ...log import info
 from . import network as network_mod
 from . import util as docker_mod
@@ -181,6 +185,13 @@ def launch(
             token_values = egress_resolve_token_values(
                 plan.egress_plan.token_env_map, dict(os.environ),
             )
+            if plan.spec.manifest.bottle_for(
+                plan.spec.agent_name,
+            ).agent_provider.forward_host_credentials:
+                access_token = codex_host_access_token(dict(os.environ))
+                for token_env, token_ref in plan.egress_plan.token_env_map.items():
+                    if token_ref == CODEX_HOST_CREDENTIAL_TOKEN_REF:
+                        token_values[token_env] = access_token
         compose_env: dict[str, str] = {
             **os.environ,
             **plan.forwarded_env,

bot_bottle/backend/docker/prepare.py

@@ -15,6 +15,7 @@ from datetime import datetime, timezone
 from pathlib import Path
 
 from ...agent_provider import runtime_for
+from ...codex_auth import write_codex_dummy_auth_file
 from ...egress import Egress
 from ...env import ResolvedEnv, resolve_env
 from ...git_gate import GitGate
@@ -155,6 +156,7 @@ def resolve_plan(
     agent_dir.mkdir(parents=True, exist_ok=True)
     env_file = agent_dir / "agent.env"
     prompt_file = agent_dir / "prompt.txt"
+    codex_auth_file = agent_dir / "codex-auth.json"
     prompt_file.write_text("")
     prompt_file.chmod(0o600)
 
@@ -219,6 +221,8 @@ def resolve_plan(
         # error reporting) that egress can't gate by auth.
         forwarded_env.setdefault("CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC", "1")
         forwarded_env.setdefault("DISABLE_ERROR_REPORTING", "1")
+    if provider.forward_host_credentials:
+        write_codex_dummy_auth_file(codex_auth_file, dict(os.environ))
     _write_env_file(resolved, env_file)
     prompt_file.write_text(agent.prompt)
 
@@ -245,6 +249,7 @@ def resolve_plan(
         agent_command=provider_runtime.command,
         agent_prompt_mode=provider_runtime.prompt_mode,
         agent_provider_template=provider.template,
+        codex_auth_file=codex_auth_file if provider.forward_host_credentials else None,
     )
 
 

bot_bottle/backend/docker/provision/provider_auth.py

@@ -0,0 +1,43 @@
+"""Provision non-secret provider auth markers into a Docker bottle."""
+
+from __future__ import annotations
+
+import os
+import subprocess
+
+from ..bottle_plan import DockerBottlePlan
+
+
+def provision_provider_auth(plan: DockerBottlePlan, target: str) -> None:
+    """Copy a dummy Codex auth marker when host credentials are
+    forwarded through egress.
+
+    The file contains no real access or refresh token values; it only
+    nudges Codex into the same user/device auth branch as the host.
+    """
+    if not plan.codex_auth_file:
+        return
+    container_home = os.environ.get("BOT_BOTTLE_CONTAINER_HOME", "/home/node")
+    auth_dir = f"{container_home}/.codex"
+    auth_path = f"{auth_dir}/auth.json"
+
+    subprocess.run(
+        ["docker", "exec", "-u", "0", target, "mkdir", "-p", auth_dir],
+        stdout=subprocess.DEVNULL,
+        check=True,
+    )
+    subprocess.run(
+        ["docker", "cp", str(plan.codex_auth_file), f"{target}:{auth_path}"],
+        stdout=subprocess.DEVNULL,
+        check=True,
+    )
+    subprocess.run(
+        ["docker", "exec", "-u", "0", target, "chown", "node:node", auth_path],
+        stdout=subprocess.DEVNULL,
+        check=True,
+    )
+    subprocess.run(
+        ["docker", "exec", "-u", "0", target, "chmod", "600", auth_path],
+        stdout=subprocess.DEVNULL,
+        check=True,
+    )

bot_bottle/backend/smolmachines/backend.py

@@ -19,6 +19,7 @@ from .bottle_plan import SmolmachinesBottlePlan
 from .provision import ca as _ca
 from .provision import git as _git
 from .provision import prompt as _prompt
+from .provision import provider_auth as _provider_auth
 from .provision import skills as _skills
 from .provision import supervise as _supervise
 
@@ -61,6 +62,11 @@ class SmolmachinesBottleBackend(
     ) -> str | None:
         return _prompt.provision_prompt(plan, target)
 
+    def provision_provider_auth(
+        self, plan: SmolmachinesBottlePlan, target: str
+    ) -> None:
+        _provider_auth.provision_provider_auth(plan, target)
+
     def provision_skills(
         self, plan: SmolmachinesBottlePlan, target: str
     ) -> None:

bot_bottle/backend/smolmachines/bottle.py

@@ -45,19 +45,11 @@ _HOME_FOR = {
 }
 
 
-def _env_flags_for(user: str) -> list[str]:
+def _env_assignments_for(user: str, env: Mapping[str, str]) -> list[str]:
     home = _HOME_FOR.get(user, f"/home/{user}")
-    return ["-e", f"HOME={home}", "-e", f"USER={user}"]
-
-
-def _guest_env_flags(env: Mapping[str, str]) -> list[str]:
-    """Render `{K: V}` into a flat `-e K=V` argv slice for
-    `smolvm machine exec`. `smolvm machine create -e` set env
-    on PID 1 but it doesn't propagate to fresh exec process
-    trees, so we have to re-pass them every call."""
-    out: list[str] = []
+    out = [f"HOME={home}", f"USER={user}"]
     for k, v in env.items():
-        out += ["-e", f"{k}={v}"]
+        out.append(f"{k}={v}")
     return out
 
 
@@ -98,9 +90,8 @@ class SmolmachinesBottle(Bottle):
         flags = ["smolvm", "machine", "exec", "--name", self.name]
         if tty:
             flags += ["-i", "-t"]
-        flags += _env_flags_for("node")
-        flags += _guest_env_flags(self._guest_env)
-        agent_tail = [self.agent_command]
+        agent_tail = ["env", *_env_assignments_for("node", self._guest_env),
+                      self.agent_command]
         provider_prompt_args = prompt_args(
             self._agent_prompt_mode, self._prompt_path, argv=argv,
         )
@@ -148,16 +139,16 @@ class SmolmachinesBottle(Bottle):
         on both backends. Pass `user="root"` for tests that need
         root.
 
-        `runuser -u <user> -- /bin/sh -c <script>` switches UID
-        without invoking a login shell; HOME / USER are set via
-        `smolvm -e` (see `_env_flags_for`)."""
-        argv = (
-            _env_flags_for(user)
-            + _guest_env_flags(self._guest_env)
-            + ["--", "runuser", "-u", user, "--", "/bin/sh", "-c", script]
-        )
-        # _smolvm.machine_exec expects argv (the bit after `--`);
-        # the -e flags go before, so call smolvm directly.
+        `runuser -u <user> -- env ... /bin/sh -c <script>` switches UID
+        without invoking a login shell, then sets HOME / USER and the
+        bottle env in the child process."""
+        argv = [
+            "--", "runuser", "-u", user, "--",
+            "env", *_env_assignments_for(user, self._guest_env),
+            "/bin/sh", "-c", script,
+        ]
+        # Call smolvm directly because this path needs the host-side
+        # subprocess capture shape used by the Docker backend.
         r = subprocess.run(
             ["smolvm", "machine", "exec", "--name", self.name] + argv,
             capture_output=True, text=True, check=False,

bot_bottle/backend/smolmachines/bottle_plan.py

@@ -97,6 +97,7 @@ class SmolmachinesBottlePlan(BottlePlan):
     agent_prompt_mode: PromptMode = "append_file"
     agent_provider_template: str = "claude"
     agent_dockerfile_path: str = ""
+    codex_auth_file: Path | None = None
 
     def print(self, *, remote_control: bool) -> None:
         """Compact y/N preflight. Same shape as the Docker

bot_bottle/backend/smolmachines/launch.py

@@ -26,7 +26,12 @@ from contextlib import ExitStack, contextmanager
 from pathlib import Path
 from typing import Callable, Generator
 
-from ...egress import EGRESS_ROUTES_IN_CONTAINER, egress_resolve_token_values
+from ...codex_auth import codex_host_access_token
+from ...egress import (
+    CODEX_HOST_CREDENTIAL_TOKEN_REF,
+    EGRESS_ROUTES_IN_CONTAINER,
+    egress_resolve_token_values,
+)
 from ...pipelock import (
     PIPELOCK_CA_CERT_IN_CONTAINER,
     PIPELOCK_CA_KEY_IN_CONTAINER,
@@ -423,7 +428,16 @@ def _resolve_token_env(
     ep = plan.egress_plan
     if not ep.routes:
         return {}
-    return egress_resolve_token_values(ep.token_env_map, dict(host_env))
+    env = dict(host_env)
+    token_values = egress_resolve_token_values(ep.token_env_map, env)
+    if plan.spec.manifest.bottle_for(
+        plan.spec.agent_name,
+    ).agent_provider.forward_host_credentials:
+        access_token = codex_host_access_token(env)
+        for token_env, token_ref in ep.token_env_map.items():
+            if token_ref == CODEX_HOST_CREDENTIAL_TOKEN_REF:
+                token_values[token_env] = access_token
+    return token_values
 
 
 def _ensure_smolmachine(image_ref: str, *, dockerfile: str = "") -> Path:

bot_bottle/backend/smolmachines/prepare.py

@@ -16,6 +16,7 @@ from pathlib import Path
 
 from ...agent_provider import runtime_for
 from ...backend import BottleSpec
+from ...codex_auth import write_codex_dummy_auth_file
 from ...backend.docker.bottle_state import (
     BottleMetadata,
     agent_state_dir,
@@ -128,6 +129,24 @@ def resolve_plan(
     if provider.template == "claude" and has_provider_auth:
         guest_env.setdefault("CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC", "1")
         guest_env.setdefault("DISABLE_ERROR_REPORTING", "1")
+    if provider.template == "codex":
+        # Codex is a Rust/rustls client: unlike the Node agents it does
+        # NOT consult the system trust store or honor NODE_EXTRA_CA_CERTS.
+        # It reads CODEX_CA_CERTIFICATE (falling back to SSL_CERT_FILE)
+        # for custom roots, across HTTPS *and* the wss responses channel.
+        # Point it at the bundle update-ca-certificates rebuilt with the
+        # egress MITM CA so Codex trusts the proxy and egress can inject
+        # the host bearer — without this, codex bottles need
+        # pipelock tls_passthrough, which disables auth injection.
+        guest_env["CODEX_CA_CERTIFICATE"] = (
+            "/etc/ssl/certs/ca-certificates.crt"
+        )
+    if provider.template == "codex" and provider.forward_host_credentials:
+        # Smolvm exec process trees do not reliably inherit the image
+        # user's login environment. Pin CODEX_HOME to the same path
+        # provision_provider_auth writes so Codex never falls back to a
+        # root or unset home and shows the sign-in picker.
+        guest_env["CODEX_HOME"] = "/home/node/.codex"
 
     supervise_plan = None
     if bottle.supervise:
@@ -144,9 +163,12 @@ def resolve_plan(
     agent_dir = agent_state_dir(slug)
     agent_dir.mkdir(parents=True, exist_ok=True)
     prompt_file = agent_dir / "prompt.txt"
+    codex_auth_file = agent_dir / "codex-auth.json"
     agent = manifest.agents[spec.agent_name]
     prompt_file.write_text(agent.prompt or "")
     prompt_file.chmod(0o600)
+    if provider.forward_host_credentials:
+        write_codex_dummy_auth_file(codex_auth_file, dict(os.environ))
 
     machine_name = f"bot-bottle-{slug}"
     # Stash the agent image ref — `launch.launch` runs the
@@ -182,6 +204,7 @@ def resolve_plan(
         agent_prompt_mode=provider_runtime.prompt_mode,
         agent_provider_template=provider.template,
         agent_dockerfile_path=agent_dockerfile_path,
+        codex_auth_file=codex_auth_file if provider.forward_host_credentials else None,
     )
 
 

bot_bottle/backend/smolmachines/provision/provider_auth.py

@@ -0,0 +1,49 @@
+"""Provision non-secret provider auth markers into a smolmachines bottle."""
+
+from __future__ import annotations
+
+import os
+
+from ....log import die
+from .. import smolvm as _smolvm
+from ..bottle_plan import SmolmachinesBottlePlan
+
+
+_DEFAULT_GUEST_HOME = "/home/node"
+
+
+def provision_provider_auth(plan: SmolmachinesBottlePlan, target: str) -> None:
+    """Copy a dummy Codex auth marker when host credentials are
+    forwarded through egress.
+
+    The real host access token remains in the egress bundle env; this
+    file only selects Codex's user/device auth code path.
+    """
+    if not plan.codex_auth_file:
+        return
+    guest_home = os.environ.get("BOT_BOTTLE_GUEST_HOME", _DEFAULT_GUEST_HOME)
+    auth_dir = f"{guest_home}/.codex"
+    auth_path = f"{auth_dir}/auth.json"
+
+    _smolvm.machine_exec(target, ["mkdir", "-p", auth_dir])
+    _smolvm.machine_cp(str(plan.codex_auth_file), f"{target}:{auth_path}")
+    _smolvm.machine_exec(target, ["chown", "node:node", auth_path])
+    _smolvm.machine_exec(target, ["chmod", "600", auth_path])
+    result = _smolvm.machine_exec(
+        target,
+        [
+            "runuser", "-u", "node", "--",
+            "env",
+            f"HOME={guest_home}",
+            f"CODEX_HOME={auth_dir}",
+            "codex", "login", "status",
+        ],
+    )
+    if result.returncode != 0:
+        detail = (result.stderr or result.stdout).strip()
+        if detail:
+            detail = f": {detail}"
+        die(
+            "codex host credentials: dummy auth was copied into the "
+            f"smolmachine, but Codex did not accept it{detail}"
+        )

bot_bottle/codex_auth.py

@@ -0,0 +1,290 @@
+"""Host Codex auth helpers.
+
+Reads the host's Codex ChatGPT/device-login auth state and returns only
+the short-lived access token needed by egress. This module deliberately
+does not expose refresh tokens or raw auth payloads.
+"""
+
+from __future__ import annotations
+
+import base64
+import json
+import os
+from copy import deepcopy
+from datetime import datetime, timezone
+from pathlib import Path
+
+from .log import die
+from .util import expand_tilde
+
+
+def codex_auth_path(host_env: dict[str, str] | None = None) -> Path:
+    env = os.environ if host_env is None else host_env
+    home = env.get("CODEX_HOME")
+    if home:
+        return Path(expand_tilde(home)) / "auth.json"
+    return Path.home() / ".codex" / "auth.json"
+
+
+def codex_host_access_token(
+    host_env: dict[str, str] | None = None,
+    *,
+    now: datetime | None = None,
+) -> str:
+    path = codex_auth_path(host_env)
+    if not path.is_file():
+        die(
+            f"codex host credentials: auth file missing at {path}. "
+            "Run `codex login --device-auth` on the host or disable "
+            "agent_provider.forward_host_credentials."
+        )
+    raw = _read_auth_object(path)
+
+    auth_mode = raw.get("auth_mode")
+    if not isinstance(auth_mode, str) or auth_mode == "api_key":
+        die(
+            "codex host credentials: host Codex auth is not user/device "
+            "auth. Run `codex login --device-auth` on the host."
+        )
+
+    tokens = raw.get("tokens")
+    if not isinstance(tokens, dict):
+        die(f"codex host credentials: {path} is missing tokens")
+    access = tokens.get("access_token")
+    if not isinstance(access, str) or not access:
+        die(
+            f"codex host credentials: {path} is missing tokens.access_token. "
+            "Run `codex login --device-auth` on the host."
+        )
+
+    exp = _jwt_exp(access)
+    if exp is None:
+        die("codex host credentials: tokens.access_token is not a JWT with exp")
+    check_now = now or datetime.now(timezone.utc)
+    if exp <= check_now:
+        die(
+            "codex host credentials: host Codex access token is expired. "
+            "Run `codex login --device-auth` on the host and restart the bottle."
+        )
+    return access
+
+
+def codex_dummy_auth_json(
+    host_env: dict[str, str] | None = None,
+    *,
+    now: datetime | None = None,
+) -> str:
+    """Return a non-secret `auth.json` that keeps Codex in the host's
+    auth branch while egress owns the real bearer token.
+
+    The dummy access/id tokens carry the *host* token's real `exp` so
+    Codex's proactive refresh lifecycle (it refreshes when its local
+    access token is at/past expiry) tracks the real token instead of
+    firing after an artificial TTL. Codex cannot refresh inside the
+    bottle — the refresh token is a placeholder and the OpenAI token
+    endpoint is off-route — so a shorter dummy exp would drop Codex to
+    the sign-in screen the moment it lapsed, even while egress still
+    holds a valid bearer."""
+    path = codex_auth_path(host_env)
+    access = codex_host_access_token(host_env, now=now)
+    raw = _read_auth_object(path)
+    host_exp = _jwt_exp(access)
+    exp_ts = int(host_exp.timestamp()) if host_exp is not None else None
+    dummy = _redact_codex_auth(deepcopy(raw), now=now, exp_ts=exp_ts)
+    return json.dumps(dummy, indent=2, sort_keys=True) + "\n"
+
+
+def write_codex_dummy_auth_file(
+    path: Path,
+    host_env: dict[str, str] | None = None,
+    *,
+    now: datetime | None = None,
+) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(codex_dummy_auth_json(host_env, now=now))
+    path.chmod(0o600)
+
+
+def _read_auth_object(path: Path) -> dict:
+    try:
+        raw = json.loads(path.read_text())
+    except (OSError, json.JSONDecodeError) as e:
+        die(f"codex host credentials: could not read valid JSON at {path}: {e}")
+    if not isinstance(raw, dict):
+        die(f"codex host credentials: {path} must contain a JSON object")
+    return raw
+
+
+def _dummy_exp(now: datetime | None, exp_ts: int | None) -> int:
+    if exp_ts is not None:
+        return exp_ts
+    check_now = now or datetime.now(timezone.utc)
+    return int(check_now.timestamp()) + 3600
+
+
+def _dummy_jwt(now: datetime | None = None, *, exp_ts: int | None = None) -> str:
+    return _encode_dummy_jwt({
+        "exp": _dummy_exp(now, exp_ts),
+        "sub": "bot-bottle-placeholder",
+    })
+
+
+def _dummy_jwt_from_host(
+    value: object, *, now: datetime | None = None, exp_ts: int | None = None,
+) -> str:
+    if not isinstance(value, str):
+        return _dummy_jwt(now, exp_ts=exp_ts)
+    parts = value.split(".")
+    if len(parts) < 2:
+        return _dummy_jwt(now, exp_ts=exp_ts)
+    try:
+        payload = json.loads(_b64url_decode(parts[1]))
+    except (ValueError, json.JSONDecodeError):
+        return _dummy_jwt(now, exp_ts=exp_ts)
+    if not isinstance(payload, dict):
+        return _dummy_jwt(now, exp_ts=exp_ts)
+    return _encode_dummy_jwt(_redact_jwt_payload(payload, now=now, exp_ts=exp_ts))
+
+
+def _encode_dummy_jwt(payload: dict) -> str:
+    def enc(obj: dict) -> str:
+        raw = json.dumps(obj, separators=(",", ":")).encode()
+        return base64.urlsafe_b64encode(raw).decode().rstrip("=")
+
+    return f"{enc({'alg': 'none', 'typ': 'JWT'})}.{enc(payload)}.placeholder"
+
+
+def _redact_jwt_payload(
+    payload: dict,
+    *,
+    now: datetime | None = None,
+    exp_ts: int | None = None,
+) -> dict:
+    out = _redact_claims(payload)
+    if not isinstance(out, dict):
+        out = {}
+    out["exp"] = _dummy_exp(now, exp_ts)
+    out.setdefault("sub", "bot-bottle-placeholder")
+    return out
+
+
+def _redact_claims(value: object) -> object:
+    if isinstance(value, dict):
+        out: dict[str, object] = {}
+        for key, inner in value.items():
+            lower = key.lower()
+            if key == "https://api.openai.com/profile":
+                out[key] = _redact_profile_claim(inner)
+            elif key == "https://api.openai.com/auth":
+                out[key] = _redact_auth_claim(inner)
+            elif lower == "email":
+                out[key] = "bot-bottle@example.invalid"
+            elif lower == "email_verified":
+                out[key] = True
+            elif lower in {"exp", "iat", "nbf", "auth_time", "pwd_auth_time"}:
+                out[key] = inner if isinstance(inner, (int, float)) else 0
+            elif lower in {"aud", "scp", "amr"}:
+                out[key] = inner if isinstance(inner, list) else []
+            elif isinstance(inner, bool):
+                out[key] = inner
+            elif isinstance(inner, (dict, list)):
+                out[key] = _redact_claims(inner)
+            else:
+                out[key] = "bot-bottle-placeholder"
+        return out
+    if isinstance(value, list):
+        return []
+    return "bot-bottle-placeholder"
+
+
+def _redact_profile_claim(value: object) -> dict:
+    profile = value if isinstance(value, dict) else {}
+    return {
+        "email": "bot-bottle@example.invalid",
+        "email_verified": bool(profile.get("email_verified", True)),
+    }
+
+
+def _redact_auth_claim(value: object) -> dict:
+    auth = value if isinstance(value, dict) else {}
+    out: dict[str, object] = {}
+    for key, inner in auth.items():
+        lower = key.lower()
+        if lower == "chatgpt_plan_type" and isinstance(inner, str) and inner:
+            out[key] = inner
+        elif lower == "chatgpt_account_id" and isinstance(inner, str) and inner:
+            # Current Codex uses the selected account id when building
+            # ChatGPT requests. Keep that non-secret identifier aligned
+            # with the host while egress owns the real bearer token.
+            out[key] = inner
+        elif lower == "localhost" and isinstance(inner, bool):
+            out[key] = inner
+        elif isinstance(inner, bool):
+            out[key] = inner
+        elif isinstance(inner, list):
+            out[key] = []
+        elif isinstance(inner, dict):
+            out[key] = {}
+        else:
+            out[key] = "bot-bottle-placeholder"
+    out.setdefault("chatgpt_plan_type", "unknown")
+    out.setdefault("user_id", "bot-bottle-placeholder")
+    out.setdefault("chatgpt_user_id", "bot-bottle-placeholder")
+    out.setdefault("chatgpt_account_id", "bot-bottle-placeholder")
+    return out
+
+
+def _redact_codex_auth(
+    value: object, *, now: datetime | None = None, exp_ts: int | None = None,
+) -> object:
+    if isinstance(value, dict):
+        out: dict[str, object] = {}
+        for key, inner in value.items():
+            lower = key.lower()
+            if lower == "openai_api_key":
+                out[key] = None
+            elif lower == "tokens":
+                out[key] = _redact_codex_auth(inner, now=now, exp_ts=exp_ts)
+            elif lower in {"access_token", "id_token"}:
+                out[key] = _dummy_jwt_from_host(inner, now=now, exp_ts=exp_ts)
+            elif "token" in lower or "secret" in lower or lower.endswith("_key"):
+                out[key] = "bot-bottle-placeholder"
+            elif lower == "account_id" and isinstance(inner, str) and inner:
+                out[key] = inner
+            elif lower in {"account_id", "user_id", "email"}:
+                out[key] = "bot-bottle-placeholder"
+            else:
+                out[key] = _redact_codex_auth(inner, now=now, exp_ts=exp_ts)
+        return out
+    if isinstance(value, list):
+        return [_redact_codex_auth(v, now=now, exp_ts=exp_ts) for v in value]
+    return value
+
+
+def _jwt_exp(token: str) -> datetime | None:
+    parts = token.split(".")
+    if len(parts) < 2:
+        return None
+    try:
+        payload = json.loads(_b64url_decode(parts[1]))
+    except (ValueError, json.JSONDecodeError):
+        return None
+    if not isinstance(payload, dict):
+        return None
+    exp = payload.get("exp")
+    if not isinstance(exp, (int, float)):
+        return None
+    return datetime.fromtimestamp(exp, timezone.utc)
+
+
+def _b64url_decode(value: str) -> str:
+    padded = value + ("=" * (-len(value) % 4))
+    return base64.urlsafe_b64decode(padded.encode("ascii")).decode("utf-8")
+
+
+__all__ = [
+    "codex_auth_path",
+    "codex_dummy_auth_json",
+    "codex_host_access_token",
+    "write_codex_dummy_auth_file",
+]

bot_bottle/egress.py

@@ -31,6 +31,9 @@ from pathlib import Path
 from .log import die
 from .manifest import Bottle
 
+CODEX_HOST_CREDENTIAL_HOSTS = ("api.openai.com", "chatgpt.com")
+CODEX_HOST_CREDENTIAL_TOKEN_REF = "BOT_BOTTLE_CODEX_HOST_ACCESS_TOKEN"
+
 
 # DNS name agents will dial for the per-bottle egress sidecar.
 # Backend-agnostic by contract: every concrete backend (Docker today,
@@ -174,11 +177,70 @@ def egress_routes_for_bottle(
     """Effective egress routes. This is what gets rendered into
     routes.yaml + what the addon enforces.
 
-    Operators that want to allow a host declare it directly in
+    Operators that want to allow a host usually declare it directly in
     `bottle.egress.routes` as an authenticated route or bare-pass entry
-    (`- host: <name>`). The legacy `bottle.egress.allowlist`
-    folding is gone — egress is the single allowlist surface."""
-    return egress_manifest_routes(bottle)
+    (`- host: <name>`). Codex host-credential forwarding is the
+    provider-owned exception: when explicitly enabled, it adds or
+    upgrades the Codex API hosts to egress-owned authenticated routes. The
+    legacy `bottle.egress.allowlist` folding is gone — egress is the
+    single allowlist surface."""
+    routes = list(egress_manifest_routes(bottle))
+    if not bottle.agent_provider.forward_host_credentials:
+        return tuple(routes)
+
+    if bottle.agent_provider.template != "codex":
+        return tuple(routes)
+
+    for host in CODEX_HOST_CREDENTIAL_HOSTS:
+        routes = _ensure_codex_host_credential_route(routes, host)
+    return tuple(routes)
+
+
+def _next_token_env(routes: list[EgressRoute]) -> str:
+    return f"EGRESS_TOKEN_{len({r.token_env for r in routes if r.token_env})}"
+
+
+def _codex_host_credential_token_env(routes: list[EgressRoute]) -> str:
+    for route in routes:
+        if route.token_ref == CODEX_HOST_CREDENTIAL_TOKEN_REF:
+            return route.token_env
+    return _next_token_env(routes)
+
+
+def _ensure_codex_host_credential_route(
+    routes: list[EgressRoute], host: str,
+) -> list[EgressRoute]:
+    for idx, route in enumerate(routes):
+        if route.host.lower() != host:
+            continue
+        if route.auth_scheme or route.token_ref:
+            if (
+                route.auth_scheme == "Bearer"
+                and route.token_ref == CODEX_HOST_CREDENTIAL_TOKEN_REF
+            ):
+                return routes
+            die(
+                "codex host credential forwarding conflicts with an "
+                f"authenticated egress route for {host}. Remove that "
+                "route auth block or disable agent_provider.forward_host_credentials."
+            )
+        routes[idx] = EgressRoute(
+            host=route.host,
+            path_allowlist=route.path_allowlist,
+            auth_scheme="Bearer",
+            token_env=_codex_host_credential_token_env(routes),
+            token_ref=CODEX_HOST_CREDENTIAL_TOKEN_REF,
+            roles=route.roles,
+        )
+        return routes
+
+    routes.append(EgressRoute(
+        host=host,
+        auth_scheme="Bearer",
+        token_env=_codex_host_credential_token_env(routes),
+        token_ref=CODEX_HOST_CREDENTIAL_TOKEN_REF,
+    ))
+    return routes
 
 
 def egress_token_env_map(
@@ -251,6 +313,8 @@ def egress_resolve_token_values(
     a sealed mapping without touching `os.environ`."""
     out: dict[str, str] = {}
     for token_env, token_ref in token_env_map.items():
+        if token_ref == CODEX_HOST_CREDENTIAL_TOKEN_REF:
+            continue
         value = host_env.get(token_ref)
         if value is None:
             die(

bot_bottle/manifest.py

@@ -228,15 +228,16 @@ class AgentProvider:
 
     template: str = "claude"
     dockerfile: str = ""
+    forward_host_credentials: bool = False
 
     @classmethod
     def from_dict(cls, bottle_name: str, raw: object) -> "AgentProvider":
         d = _as_json_object(raw, f"bottle '{bottle_name}' agent_provider")
         for k in d:
-            if k not in {"template", "dockerfile"}:
+            if k not in {"template", "dockerfile", "forward_host_credentials"}:
                 raise ManifestError(
                     f"bottle '{bottle_name}' agent_provider has unknown key {k!r}; "
-                    f"allowed: template, dockerfile"
+                    f"allowed: template, dockerfile, forward_host_credentials"
                 )
         template = d.get("template", "claude")
         if not isinstance(template, str) or not template:
@@ -255,7 +256,22 @@ class AgentProvider:
                 f"bottle '{bottle_name}' agent_provider.dockerfile must be a "
                 f"string (was {type(dockerfile).__name__})"
             )
-        return cls(template=template, dockerfile=dockerfile)
+        forward_host_credentials = d.get("forward_host_credentials", False)
+        if not isinstance(forward_host_credentials, bool):
+            raise ManifestError(
+                f"bottle '{bottle_name}' agent_provider.forward_host_credentials "
+                f"must be a boolean (was {type(forward_host_credentials).__name__})"
+            )
+        if forward_host_credentials and template != "codex":
+            raise ManifestError(
+                f"bottle '{bottle_name}' agent_provider.forward_host_credentials "
+                "is currently only supported for template 'codex'"
+            )
+        return cls(
+            template=template,
+            dockerfile=dockerfile,
+            forward_host_credentials=forward_host_credentials,
+        )
 
 
 @dataclass(frozen=True)

bot_bottle/pipelock.py

@@ -21,7 +21,11 @@ from dataclasses import dataclass
 from pathlib import Path
 from typing import cast
 
-from .egress import EGRESS_HOSTNAME, egress_routes_for_bottle
+from .egress import (
+    CODEX_HOST_CREDENTIAL_HOSTS,
+    EGRESS_HOSTNAME,
+    egress_routes_for_bottle,
+)
 from .supervise import SUPERVISE_HOSTNAME
 from .manifest import Bottle
 
@@ -111,6 +115,19 @@ def pipelock_effective_tls_passthrough(bottle: Bottle) -> list[str]:
     for route in bottle.egress.routes:
         if route.Pipelock.TlsPassthrough:
             seen.setdefault(route.Host, None)
+    # forward_host_credentials makes egress inject the host ChatGPT bearer
+    # on the Codex API hosts AFTER the agent boundary. Pipelock sits
+    # downstream of egress and DLP-scans request headers; left to MITM
+    # these routes it flags the injected JWT as a leaked secret
+    # ("request header contains secret") and blocks. Pass them through so
+    # pipelock still enforces the host allowlist on CONNECT but does not
+    # decrypt + rescan egress-owned auth. The auto-added routes live in
+    # egress_routes_for_bottle, not bottle.egress.routes, so add the
+    # hosts explicitly here.
+    provider = bottle.agent_provider
+    if provider.forward_host_credentials and provider.template == "codex":
+        for host in CODEX_HOST_CREDENTIAL_HOSTS:
+            seen.setdefault(host, None)
     return sorted(seen.keys())
 
 

docs/prds/0029-codex-host-credentials-egress.md

@@ -0,0 +1,186 @@
+# PRD 0029: Codex host credentials through egress
+
+- **Status:** Draft
+- **Author:** didericis-codex
+- **Created:** 2026-05-29
+- **Issue:** #109
+
+## Summary
+
+Allow Codex bottles to use a host-authorized ChatGPT/device-login
+access token by forwarding it only into the egress sidecar, gated by an
+explicit `agent_provider.forward_host_credentials` manifest flag.
+
+## Problem
+
+Codex bottles can reach OpenAI hosts after they are added to egress, but
+requests to Codex's ChatGPT-backed API endpoints still fail with HTTP
+403 when the egress route is unauthenticated. The egress proxy strips
+agent-originated `Authorization` headers and only re-injects auth for
+routes that declare an egress-owned token. Bare `api.openai.com` or
+`chatgpt.com` routes therefore forward Codex requests without the
+ChatGPT bearer token.
+
+Copying the host `~/.codex/auth.json` into the agent would solve auth
+mode detection but would also put access and refresh material inside the
+agent sandbox. That cuts against bot-bottle's credential minimization
+model: provider credentials should live in the sidecar boundary when
+possible, not in the agent.
+
+## Goals / Success Criteria
+
+- A Codex bottle with host ChatGPT auth can call Codex's
+  `api.openai.com` and `chatgpt.com` endpoints through egress.
+- Host credential forwarding happens only when the bottle declares
+  `agent_provider.forward_host_credentials: true`.
+- The agent container does not receive `OPENAI_API_KEY`,
+  `CODEX_ACCESS_TOKEN`, or real `tokens.access_token` /
+  `tokens.refresh_token` values.
+- The agent container receives only a dummy Codex `auth.json` that
+  preserves the host auth-mode shape, keeps the selected ChatGPT
+  account id, and replaces credential values with placeholders.
+- Egress route files remain non-secret: they contain only host/path/auth
+  slot metadata, never token values.
+- Missing, API-key, malformed, or expired host Codex auth fails
+  launch with a clear operator-facing message.
+- Existing Claude OAuth placeholder behavior remains unchanged.
+
+## Non-goals
+
+- Refreshing Codex tokens in the sidecar. The first cut reads the host's
+  current access token at launch; operators can restart after host Codex
+  refreshes auth.
+- Copying host `~/.codex/auth.json` credentials into the agent.
+- Allowing arbitrary host credential forwarding. This PRD covers Codex
+  ChatGPT/device-login credentials only.
+- Hot-applying new authenticated Codex routes to an existing running
+  sidecar. The current hot-apply path cannot safely populate new token
+  env slots in an already-running container.
+
+## Scope
+
+### In scope
+
+- Add `agent_provider.forward_host_credentials` to the bottle manifest
+  schema, defaulting to `false`.
+- Support the flag for `agent_provider.template: codex`.
+- Read host Codex auth from `$CODEX_HOME/auth.json` when `CODEX_HOME` is
+  set, otherwise from `~/.codex/auth.json`.
+- Extract only `tokens.access_token` for egress injection.
+- Generate a dummy agent-side `auth.json` from the host auth file's
+  mode and key shape, without copying real token values.
+- Validate that host auth is not API-key mode and the access token is
+  present, JWT-shaped, and not expired.
+- Add or upgrade `api.openai.com` and `chatgpt.com` egress routes to
+  inject that access token via a shared `EGRESS_TOKEN_N` sidecar env
+  slot.
+- Pass the extracted token only into the sidecar compose/run
+  environment, alongside other egress token values.
+
+### Out of scope
+
+- Sidecar-owned refresh using `tokens.refresh_token`.
+- Sharing full Codex auth state with the agent.
+- Supporting host credential forwarding for non-Codex providers.
+
+## Design
+
+### Manifest
+
+Extend `agent_provider`:
+
+```yaml
+agent_provider:
+  template: codex
+  forward_host_credentials: true
+```
+
+The field defaults to `false`. If set on a non-Codex provider, manifest
+validation should reject it until that provider has a concrete,
+credential-minimizing implementation.
+
+### Host auth extraction
+
+At prepare/launch time, when the flag is enabled for Codex:
+
+1. Resolve the host Codex home directory from `$CODEX_HOME`, falling
+   back to `~/.codex`.
+2. Parse `auth.json`.
+3. Require user/device auth mode rather than API-key auth.
+4. Require a non-empty `tokens.access_token`.
+5. Parse the JWT payload enough to require an `exp` claim in the future.
+6. Return only the access token value to the launch path.
+
+Errors should name the missing or invalid condition and point the
+operator at `codex login --device-auth`, without printing token values.
+
+### Egress route
+
+When forwarding host Codex credentials, the effective egress route table
+should contain authenticated `api.openai.com` and `chatgpt.com` routes.
+If the bottle already declares either host as a bare-pass route, upgrade
+it in the effective route table rather than requiring a duplicate
+manifest entry. If the bottle already declares an authenticated route for
+either host, fail rather than guessing whether to override
+operator-provided auth, unless that route already uses the synthetic
+Codex host credential token reference.
+
+The rendered route should look like any other egress-owned auth route:
+
+```yaml
+routes:
+  - host: "api.openai.com"
+    auth_scheme: "Bearer"
+    token_env: "EGRESS_TOKEN_N"
+  - host: "chatgpt.com"
+    auth_scheme: "Bearer"
+    token_env: "EGRESS_TOKEN_N"
+```
+
+The access token value is supplied through the sidecar process
+environment for that `EGRESS_TOKEN_N` slot. It must not be written to
+`routes.yaml`, compose files, env files, logs, or user-facing output.
+
+### Data flow
+
+```mermaid
+flowchart LR
+    H["Host ~/.codex/auth.json"] --> L["bot-bottle launch"]
+    L -->|access token only| S["egress sidecar env"]
+    L -->|dummy auth.json only| A
+    A["Codex agent"] -->|HTTPS via proxy, auth stripped| E["egress"]
+    E -->|Bearer injected from env| C["api.openai.com / chatgpt.com"]
+```
+
+## Implementation chunks
+
+1. **PRD first.** Land this document as the first commit on the feature
+   branch.
+2. **Manifest schema.** Add `forward_host_credentials`, validation, and
+   unit tests.
+3. **Host Codex auth reader.** Add a small stdlib-only helper for
+   parsing and validating host Codex auth without printing values.
+4. **Effective egress route.** Add/upgrade the Codex API routes when the
+   flag is enabled, and add tests for bare route upgrade,
+   missing-route insertion, and authenticated-route conflict.
+5. **Agent auth marker.** Provision a dummy Codex `auth.json` into the
+   agent home so Codex selects the host's user/device auth branch while
+   real credentials stay in egress.
+6. **Launch wiring.** Pass the host access token into the egress sidecar
+   env for Docker and smolmachines without exposing it to the agent.
+7. **Docs and tests.** Update README examples and run the unit suite.
+
+## Open questions
+
+- Should a later version support sidecar refresh using the host refresh
+  token, or should restart-on-expiry remain the policy?
+- Should telemetry hosts such as `ab.chatgpt.com` stay blocked by
+  default even when Codex ChatGPT auth is enabled?
+
+## References
+
+- Gitea issue #109: Codex ChatGPT auth should inject host access token
+  via egress.
+- PRD 0017: Egress-proxy — universal MITM with path filtering + auth
+  injection.
+- PRD 0026: Agent provider templates.

tests/unit/test_codex_auth.py

@@ -0,0 +1,207 @@
+"""Unit: host Codex auth extraction."""
+
+from __future__ import annotations
+
+import base64
+import json
+import tempfile
+import unittest
+from datetime import datetime, timezone
+from pathlib import Path
+
+from bot_bottle.codex_auth import (
+    codex_auth_path,
+    codex_dummy_auth_json,
+    codex_host_access_token,
+)
+from bot_bottle.log import Die
+
+
+def _jwt(exp: int) -> str:
+    def enc(obj: dict) -> str:
+        raw = json.dumps(obj, separators=(",", ":")).encode()
+        return base64.urlsafe_b64encode(raw).decode().rstrip("=")
+    return f"{enc({'alg': 'none'})}.{enc({'exp': exp})}.sig"
+
+
+def _jwt_payload(token: str) -> dict:
+    payload = token.split(".")[1]
+    payload += "=" * (-len(payload) % 4)
+    return json.loads(base64.urlsafe_b64decode(payload.encode()).decode())
+
+
+class TestCodexHostAccessToken(unittest.TestCase):
+    def setUp(self):
+        self.tmp = tempfile.TemporaryDirectory(prefix="cb-codex-auth.")
+        self.home = Path(self.tmp.name)
+        self.auth_path = self.home / "auth.json"
+
+    def tearDown(self):
+        self.tmp.cleanup()
+
+    def _write(self, payload: dict) -> None:
+        self.auth_path.write_text(json.dumps(payload))
+
+    def test_auth_path_uses_codex_home(self):
+        self.assertEqual(
+            self.auth_path,
+            codex_auth_path({"CODEX_HOME": str(self.home)}),
+        )
+
+    def test_returns_fresh_chatgpt_access_token(self):
+        token = _jwt(2000000000)
+        self._write({
+            "auth_mode": "chatgpt",
+            "tokens": {"access_token": token, "refresh_token": "hidden"},
+        })
+        out = codex_host_access_token(
+            {"CODEX_HOME": str(self.home)},
+            now=datetime(2026, 1, 1, tzinfo=timezone.utc),
+        )
+        self.assertEqual(token, out)
+
+    def test_missing_auth_file_dies(self):
+        with self.assertRaises(Die):
+            codex_host_access_token({"CODEX_HOME": str(self.home)})
+
+    def test_non_chatgpt_auth_dies(self):
+        self._write({"auth_mode": "api_key", "tokens": {"access_token": _jwt(2)}})
+        with self.assertRaises(Die):
+            codex_host_access_token({"CODEX_HOME": str(self.home)})
+
+    def test_user_auth_mode_is_allowed(self):
+        token = _jwt(2000000000)
+        self._write({"auth_mode": "user", "tokens": {"access_token": token}})
+        out = codex_host_access_token(
+            {"CODEX_HOME": str(self.home)},
+            now=datetime(2026, 1, 1, tzinfo=timezone.utc),
+        )
+        self.assertEqual(token, out)
+
+    def test_expired_token_dies(self):
+        self._write({
+            "auth_mode": "chatgpt",
+            "tokens": {"access_token": _jwt(1000)},
+        })
+        with self.assertRaises(Die):
+            codex_host_access_token(
+                {"CODEX_HOME": str(self.home)},
+                now=datetime(2026, 1, 1, tzinfo=timezone.utc),
+            )
+
+    def test_non_jwt_token_dies(self):
+        self._write({
+            "auth_mode": "chatgpt",
+            "tokens": {"access_token": "not-a-jwt"},
+        })
+        with self.assertRaises(Die):
+            codex_host_access_token({"CODEX_HOME": str(self.home)})
+
+    def test_dummy_auth_preserves_mode_and_redacts_tokens(self):
+        access = _jwt(2000000000)
+        refresh = "host-refresh-token"
+        self._write({
+            "auth_mode": "chatgpt",
+            "OPENAI_API_KEY": None,
+            "tokens": {
+                "access_token": access,
+                "id_token": _jwt(2000000000),
+                "refresh_token": refresh,
+                "account_id": "acct-host",
+            },
+            "last_refresh": "2026-05-29T00:00:00.000Z",
+        })
+        dummy = json.loads(codex_dummy_auth_json(
+            {"CODEX_HOME": str(self.home)},
+            now=datetime(2026, 1, 1, tzinfo=timezone.utc),
+        ))
+        self.assertEqual("chatgpt", dummy["auth_mode"])
+        self.assertIsNone(dummy["OPENAI_API_KEY"])
+        self.assertNotEqual(access, dummy["tokens"]["access_token"])
+        self.assertNotEqual(refresh, dummy["tokens"]["refresh_token"])
+        self.assertEqual("bot-bottle-placeholder", dummy["tokens"]["refresh_token"])
+        self.assertEqual("acct-host", dummy["tokens"]["account_id"])
+        self.assertIsNotNone(
+            codex_host_access_token(
+                {"CODEX_HOME": str(self.home)},
+                now=datetime(2026, 1, 1, tzinfo=timezone.utc),
+            )
+        )
+
+    def test_dummy_auth_tokens_inherit_host_token_exp(self):
+        # Codex refreshes when its local access token is at/past exp;
+        # the dummy must carry the host token's real exp so Codex does
+        # not drop to the sign-in screen after an artificial TTL while
+        # egress still holds a valid bearer.
+        host_exp = 2000000000
+        self._write({
+            "auth_mode": "chatgpt",
+            "tokens": {
+                "access_token": _jwt(host_exp),
+                "id_token": _jwt(host_exp),
+                "refresh_token": "hidden",
+            },
+        })
+        dummy = json.loads(codex_dummy_auth_json(
+            {"CODEX_HOME": str(self.home)},
+            now=datetime(2026, 1, 1, tzinfo=timezone.utc),
+        ))
+        self.assertEqual(
+            host_exp, _jwt_payload(dummy["tokens"]["access_token"])["exp"],
+        )
+        self.assertEqual(
+            host_exp, _jwt_payload(dummy["tokens"]["id_token"])["exp"],
+        )
+
+    def test_dummy_auth_keeps_required_account_claim_shape(self):
+        def jwt(payload: dict) -> str:
+            def enc(obj: dict) -> str:
+                raw = json.dumps(obj, separators=(",", ":")).encode()
+                return base64.urlsafe_b64encode(raw).decode().rstrip("=")
+            return f"{enc({'alg': 'none'})}.{enc(payload)}.sig"
+
+        self._write({
+            "auth_mode": "chatgpt",
+            "tokens": {
+                "access_token": jwt({
+                    "exp": 2000000000,
+                    "https://api.openai.com/auth": {
+                        "chatgpt_plan_type": "plus",
+                        "chatgpt_account_id": "acct-real",
+                        "chatgpt_user_id": "user-real",
+                        "user_id": "auth-user-real",
+                        "localhost": True,
+                    },
+                    "https://api.openai.com/profile": {
+                        "email": "real@example.invalid",
+                        "email_verified": True,
+                    },
+                }),
+                "id_token": jwt({
+                    "exp": 2000000000,
+                    "email": "real@example.invalid",
+                    "email_verified": True,
+                    "https://api.openai.com/auth": {
+                        "chatgpt_plan_type": "plus",
+                        "chatgpt_account_id": "acct-real",
+                    },
+                }),
+                "refresh_token": "hidden",
+            },
+        })
+        dummy = json.loads(codex_dummy_auth_json(
+            {"CODEX_HOME": str(self.home)},
+            now=datetime(2026, 1, 1, tzinfo=timezone.utc),
+        ))
+        access_payload = _jwt_payload(dummy["tokens"]["access_token"])
+        auth = access_payload["https://api.openai.com/auth"]
+        profile = access_payload["https://api.openai.com/profile"]
+        self.assertEqual("plus", auth["chatgpt_plan_type"])
+        self.assertEqual("acct-real", auth["chatgpt_account_id"])
+        self.assertEqual("bot-bottle-placeholder", auth["chatgpt_user_id"])
+        self.assertEqual("bot-bottle@example.invalid", profile["email"])
+        self.assertTrue(profile["email_verified"])
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/test_docker_provision_provider_auth.py

@@ -0,0 +1,104 @@
+"""Unit: docker provider auth marker provisioning."""
+
+from __future__ import annotations
+
+import unittest
+from pathlib import Path
+from unittest.mock import patch
+
+from bot_bottle.backend import BottleSpec
+from bot_bottle.backend.docker.bottle_plan import DockerBottlePlan
+from bot_bottle.backend.docker.provision import provider_auth as _provider_auth
+from bot_bottle.egress import EgressPlan
+from bot_bottle.git_gate import GitGatePlan
+from bot_bottle.manifest import Manifest
+from bot_bottle.pipelock import PipelockProxyPlan
+
+
+def _plan(*, codex_auth_file: Path | None = None) -> DockerBottlePlan:
+    manifest = Manifest.from_json_obj({
+        "bottles": {"dev": {"agent_provider": {"template": "codex"}}},
+        "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},
+    })
+    return DockerBottlePlan(
+        spec=BottleSpec(
+            manifest=manifest,
+            agent_name="demo",
+            copy_cwd=False,
+            user_cwd="/tmp/x",
+        ),
+        stage_dir=Path("/tmp/stage"),
+        slug="demo-abc12",
+        container_name="bot-bottle-demo-abc12",
+        container_name_pinned=False,
+        image="bot-bottle-codex:latest",
+        derived_image="",
+        runtime_image="bot-bottle-codex:latest",
+        dockerfile_path="",
+        env_file=Path("/tmp/agent.env"),
+        forwarded_env={},
+        prompt_file=Path("/tmp/prompt.txt"),
+        proxy_plan=PipelockProxyPlan(
+            yaml_path=Path("/tmp/pipelock.yaml"),
+            slug="demo-abc12",
+        ),
+        git_gate_plan=GitGatePlan(
+            slug="demo-abc12",
+            entrypoint_script=Path("/tmp/git-gate-entrypoint.sh"),
+            hook_script=Path("/tmp/git-gate-hook"),
+            access_hook_script=Path("/tmp/git-gate-access-hook"),
+            upstreams=(),
+        ),
+        egress_plan=EgressPlan(
+            slug="demo-abc12",
+            routes_path=Path("/tmp/routes.yaml"),
+            routes=(),
+            token_env_map={},
+        ),
+        supervise_plan=None,
+        use_runsc=False,
+        agent_command="codex",
+        agent_provider_template="codex",
+        codex_auth_file=codex_auth_file,
+    )
+
+
+class TestProvisionProviderAuth(unittest.TestCase):
+    def test_noop_without_codex_auth_file(self):
+        with patch.object(_provider_auth.subprocess, "run") as run:
+            _provider_auth.provision_provider_auth(
+                _plan(), "bot-bottle-demo-abc12",
+            )
+        self.assertEqual(0, run.call_count)
+
+    def test_copies_dummy_auth_json_to_codex_home(self):
+        with patch.object(_provider_auth.subprocess, "run") as run:
+            _provider_auth.provision_provider_auth(
+                _plan(codex_auth_file=Path("/tmp/codex-auth.json")),
+                "bot-bottle-demo-abc12",
+            )
+        argvs = [call.args[0] for call in run.call_args_list]
+        self.assertIn(
+            ["docker", "exec", "-u", "0", "bot-bottle-demo-abc12",
+             "mkdir", "-p", "/home/node/.codex"],
+            argvs,
+        )
+        self.assertIn(
+            ["docker", "cp", "/tmp/codex-auth.json",
+             "bot-bottle-demo-abc12:/home/node/.codex/auth.json"],
+            argvs,
+        )
+        self.assertIn(
+            ["docker", "exec", "-u", "0", "bot-bottle-demo-abc12",
+             "chown", "node:node", "/home/node/.codex/auth.json"],
+            argvs,
+        )
+        self.assertIn(
+            ["docker", "exec", "-u", "0", "bot-bottle-demo-abc12",
+             "chmod", "600", "/home/node/.codex/auth.json"],
+            argvs,
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/unit/test_egress.py

@@ -4,6 +4,7 @@ resolution (PRD 0017)."""
 import unittest
 
 from bot_bottle.egress import (
+    CODEX_HOST_CREDENTIAL_TOKEN_REF,
     egress_manifest_routes,
     egress_render_routes,
     egress_resolve_token_values,
@@ -22,6 +23,21 @@ def _bottle(routes):
     }).bottles["dev"]
 
 
+def _codex_bottle(*, forward_host_credentials: bool, routes):
+    return Manifest.from_json_obj({
+        "bottles": {
+            "dev": {
+                "agent_provider": {
+                    "template": "codex",
+                    "forward_host_credentials": forward_host_credentials,
+                },
+                "egress": {"routes": routes},
+            }
+        },
+        "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},
+    }).bottles["dev"]
+
+
 class TestRoutesForBottle(unittest.TestCase):
     def test_authenticated_route_gets_slot(self):
         b = _bottle([{
@@ -107,6 +123,59 @@ class TestRoutesForBottleUsesManifestOnly(unittest.TestCase):
         effective = [r.host for r in egress_routes_for_bottle(b)]
         self.assertEqual(["x.example"], effective)
 
+    def test_codex_forward_host_credentials_adds_codex_routes(self):
+        b = _codex_bottle(forward_host_credentials=True, routes=[])
+        routes = egress_routes_for_bottle(b)
+        self.assertEqual(["api.openai.com", "chatgpt.com"], [r.host for r in routes])
+        self.assertEqual("Bearer", routes[0].auth_scheme)
+        self.assertEqual("EGRESS_TOKEN_0", routes[0].token_env)
+        self.assertEqual(CODEX_HOST_CREDENTIAL_TOKEN_REF, routes[0].token_ref)
+        self.assertEqual("Bearer", routes[1].auth_scheme)
+        self.assertEqual("EGRESS_TOKEN_0", routes[1].token_env)
+        self.assertEqual(CODEX_HOST_CREDENTIAL_TOKEN_REF, routes[1].token_ref)
+
+    def test_codex_forward_host_credentials_upgrades_bare_chatgpt_route(self):
+        b = _codex_bottle(
+            forward_host_credentials=True,
+            routes=[{"host": "chatgpt.com", "path_allowlist": ["/backend-api/"]}],
+        )
+        routes = egress_routes_for_bottle(b)
+        self.assertEqual(2, len(routes))
+        self.assertEqual("chatgpt.com", routes[0].host)
+        self.assertEqual("Bearer", routes[0].auth_scheme)
+        self.assertEqual("EGRESS_TOKEN_0", routes[0].token_env)
+        self.assertEqual(CODEX_HOST_CREDENTIAL_TOKEN_REF, routes[0].token_ref)
+        self.assertEqual(("/backend-api/",), routes[0].path_allowlist)
+        self.assertEqual("api.openai.com", routes[1].host)
+        self.assertEqual("EGRESS_TOKEN_0", routes[1].token_env)
+
+    def test_codex_forward_host_credentials_accepts_explicit_synthetic_route(self):
+        b = _codex_bottle(
+            forward_host_credentials=True,
+            routes=[{
+                "host": "api.openai.com",
+                "auth": {
+                    "scheme": "Bearer",
+                    "token_ref": CODEX_HOST_CREDENTIAL_TOKEN_REF,
+                },
+            }],
+        )
+        routes = egress_routes_for_bottle(b)
+        self.assertEqual(["api.openai.com", "chatgpt.com"], [r.host for r in routes])
+        self.assertEqual("EGRESS_TOKEN_0", routes[0].token_env)
+        self.assertEqual("EGRESS_TOKEN_0", routes[1].token_env)
+
+    def test_codex_forward_host_credentials_conflicts_with_authed_route(self):
+        b = _codex_bottle(
+            forward_host_credentials=True,
+            routes=[{
+                "host": "chatgpt.com",
+                "auth": {"scheme": "Bearer", "token_ref": "OTHER"},
+            }],
+        )
+        with self.assertRaises(Die):
+            egress_routes_for_bottle(b)
+
 
 class TestTokenEnvMap(unittest.TestCase):
     def test_only_authenticated_routes_contribute(self):
@@ -217,6 +286,13 @@ class TestResolveTokenValues(unittest.TestCase):
                 {"GH_PAT": ""},
             )
 
+    def test_codex_host_credential_ref_is_resolved_by_launch(self):
+        out = egress_resolve_token_values(
+            {"EGRESS_TOKEN_0": CODEX_HOST_CREDENTIAL_TOKEN_REF},
+            {},
+        )
+        self.assertEqual({}, out)
+
 
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_manifest_egress.py

@@ -29,6 +29,13 @@ def _provider_bottle(provider, routes):
     }).bottles["dev"]
 
 
+def _provider_config_bottle(agent_provider):
+    return Manifest.from_json_obj({
+        "bottles": {"dev": {"agent_provider": agent_provider}},
+        "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},
+    }).bottles["dev"]
+
+
 class TestMinimalRoute(unittest.TestCase):
     def test_host_only(self):
         b = _bottle([{"host": "api.example.com"}])
@@ -52,6 +59,33 @@ class TestMinimalRoute(unittest.TestCase):
             _bottle([{"host": "x.example", "wat": "yes"}])
 
 
+class TestAgentProviderHostCredentials(unittest.TestCase):
+    def test_forward_host_credentials_defaults_false(self):
+        b = _provider_config_bottle({"template": "codex"})
+        self.assertFalse(b.agent_provider.forward_host_credentials)
+
+    def test_forward_host_credentials_allowed_for_codex(self):
+        b = _provider_config_bottle({
+            "template": "codex",
+            "forward_host_credentials": True,
+        })
+        self.assertTrue(b.agent_provider.forward_host_credentials)
+
+    def test_forward_host_credentials_must_be_boolean(self):
+        with self.assertRaises(ManifestError):
+            _provider_config_bottle({
+                "template": "codex",
+                "forward_host_credentials": "yes",
+            })
+
+    def test_forward_host_credentials_rejected_for_claude(self):
+        with self.assertRaises(ManifestError):
+            _provider_config_bottle({
+                "template": "claude",
+                "forward_host_credentials": True,
+            })
+
+
 class TestPathAllowlist(unittest.TestCase):
     def test_optional(self):
         b = _bottle([{"host": "x.example"}])

tests/unit/test_pipelock_allowlist.py

@@ -113,6 +113,25 @@ class TestTlsPassthrough(unittest.TestCase):
         ])))
         self.assertEqual(["api.openai.com"], passthrough)
 
+    def test_forward_host_credentials_passes_through_codex_hosts(self):
+        # Egress injects the host bearer on the Codex API hosts; pipelock
+        # must pass them through or its header DLP blocks the injected JWT
+        # ("request header contains secret"). These routes are auto-added
+        # (not in bottle.egress.routes), so passthrough is host-derived.
+        passthrough = pipelock_effective_tls_passthrough(_bottle({
+            "agent_provider": {
+                "template": "codex",
+                "forward_host_credentials": True,
+            },
+        }))
+        self.assertEqual(["api.openai.com", "chatgpt.com"], passthrough)
+
+    def test_no_codex_passthrough_without_forward_host_credentials(self):
+        passthrough = pipelock_effective_tls_passthrough(_bottle({
+            "agent_provider": {"template": "codex"},
+        }))
+        self.assertEqual([], passthrough)
+
 
 class TestSsrfIpAllowlist(unittest.TestCase):
     def test_default_empty(self):

tests/unit/test_smolmachines_bottle.py

@@ -59,10 +59,9 @@ class TestClaudeArgvWrapped(unittest.TestCase):
                 "smolvm", "machine", "exec", "--name",
                 "bot-bottle-dev-abc",
                 "-i", "-t",
-                "-e", "HOME=/home/node",
-                "-e", "USER=node",
                 "--",
                 "runuser", "-u", "node", "--",
+                "env", "HOME=/home/node", "USER=node",
                 "claude",
             ],
             argv,
@@ -107,7 +106,7 @@ class TestClaudeArgvWrapped(unittest.TestCase):
             HTTPS_PROXY="http://127.0.0.1:1234",
             NO_PROXY="localhost",
         ).agent_argv([]))
-        self.assertIn("-e", argv)
+        self.assertIn("env", argv)
         self.assertIn("HTTPS_PROXY=http://127.0.0.1:1234", argv)
         self.assertIn("NO_PROXY=localhost", argv)
 
@@ -119,8 +118,8 @@ class TestClaudeArgvWrapped(unittest.TestCase):
         argv = _bottle().agent_argv([])
         agent_idx = argv.index("claude")
         self.assertEqual(
-            ["runuser", "-u", "node", "--"],
-            argv[agent_idx - 4:agent_idx],
+            ["runuser", "-u", "node", "--", "env"],
+            argv[agent_idx - 7:agent_idx - 2],
         )
 
 

tests/unit/test_smolmachines_provision.py

@@ -21,6 +21,7 @@ from bot_bottle.backend.smolmachines.provision import (
     ca as _ca,
     git as _git,
     prompt as _prompt,
+    provider_auth as _provider_auth,
     skills as _skills,
     supervise as _supervise,
 )
@@ -55,6 +56,7 @@ def _plan(
     bundle_ip: str = "192.168.50.2",
     agent_git_gate_host: str = "127.0.0.1:55555",
     agent_supervise_url: str = "http://127.0.0.1:55556/",
+    codex_auth_file: Path | None = None,
 ) -> SmolmachinesBottlePlan:
     bottle_json: dict = {}
     git_json: dict = {}
@@ -129,6 +131,7 @@ def _plan(
         supervise_plan=supervise_plan,
         agent_git_gate_host=agent_git_gate_host,
         agent_supervise_url=agent_supervise_url,
+        codex_auth_file=codex_auth_file,
     )
 
 
@@ -189,6 +192,66 @@ class TestProvisionPrompt(unittest.TestCase):
         )
 
 
+class TestProvisionProviderAuth(unittest.TestCase):
+    def test_noop_without_codex_auth_file(self):
+        with patch(
+            "bot_bottle.backend.smolmachines.provision.provider_auth._smolvm.machine_cp"
+        ) as cp, patch(
+            "bot_bottle.backend.smolmachines.provision.provider_auth._smolvm.machine_exec"
+        ) as ex:
+            _provider_auth.provision_provider_auth(
+                _plan(), "bot-bottle-demo-abc12",
+            )
+        self.assertEqual(0, cp.call_count)
+        self.assertEqual(0, ex.call_count)
+
+    def test_copies_dummy_auth_json_to_codex_home(self):
+        with patch(
+            "bot_bottle.backend.smolmachines.provision.provider_auth._smolvm.machine_cp"
+        ) as cp, patch(
+            "bot_bottle.backend.smolmachines.provision.provider_auth._smolvm.machine_exec"
+        ) as ex:
+            ex.return_value = SmolvmRunResult(0, "Logged in using ChatGPT\n", "")
+            _provider_auth.provision_provider_auth(
+                _plan(codex_auth_file=Path("/tmp/codex-auth.json")),
+                "bot-bottle-demo-abc12",
+            )
+        cp.assert_called_once_with(
+            "/tmp/codex-auth.json",
+            "bot-bottle-demo-abc12:/home/node/.codex/auth.json",
+        )
+        argv_seen = [call.args[1] for call in ex.call_args_list]
+        self.assertIn(["mkdir", "-p", "/home/node/.codex"], argv_seen)
+        self.assertIn(
+            ["chown", "node:node", "/home/node/.codex/auth.json"],
+            argv_seen,
+        )
+        self.assertIn(["chmod", "600", "/home/node/.codex/auth.json"], argv_seen)
+        self.assertIn(
+            [
+                "runuser", "-u", "node", "--",
+                "env",
+                "HOME=/home/node",
+                "CODEX_HOME=/home/node/.codex",
+                "codex", "login", "status",
+            ],
+            argv_seen,
+        )
+
+    def test_dies_when_codex_rejects_dummy_auth(self):
+        with patch(
+            "bot_bottle.backend.smolmachines.provision.provider_auth._smolvm.machine_cp"
+        ), patch(
+            "bot_bottle.backend.smolmachines.provision.provider_auth._smolvm.machine_exec"
+        ) as ex:
+            ex.return_value = SmolvmRunResult(1, "Not logged in\n", "")
+            with self.assertRaises(SystemExit):
+                _provider_auth.provision_provider_auth(
+                    _plan(codex_auth_file=Path("/tmp/codex-auth.json")),
+                    "bot-bottle-demo-abc12",
+                )
+
+
 class TestProvisionSkills(unittest.TestCase):
     def _patch_host_skill_dir(self, returns: dict[str, str]):
         return patch(