feat(providers): Codex CLI provider — OpenAI via ModelProvider.OPENAI (#659)

* feat(providers): Codex CLI provider — OpenAI via ModelProvider.OPENAI

Mirrors the grok blueprint end to end: CodexCliProvider (RO ~/.codex
mount, ANTHROPIC_* blanked), an orchestrator-side codex_auth.py
refresher (JWT-exp staleness, atomic rewrite, lock-serialized single-use
rotation, --check backstop; the CLI's own in-process refresh write
no-ops on the RO mount by design — margins keep the orchestrator ahead
of the CLI's 5-minute window), config.toml rendering with required=true
gateway MCP servers, execpolicy deny rules (forbidden-only), per-role
--sandbox (developer=workspace-write, review/doc roles read-only),
codex exec --json with pinned ROBOCO_CODEX_CLI_MODEL (gpt-5.3-codex),
usage summed from typed turn.completed events priced via the real
4-bucket split, dedicated image + entrypoint, registry/park/finalize/
compose/release wiring. V1 excludes interactive intake/secretary.

Per adversarial review: migration 083 seeds the openai provider row
enabled=True (without it every routing path 404'd — the whole feature
was operationally dead code; grok needed the same seed in 039), the
panel picker gained the OpenAI catalog group it silently lacked, and
exit classification is structural — only stderr and error.message
fields from error events are sniffed (word-boundaried patterns, exact
auth phrases, bare 'login' dropped), so the model echoing on-topic
words can never false-park the provider fleet-wide, proven by a
benign-transcript test. Known open risk flagged, not claimed: whether
codex's workspace-write OS sandbox excludes /app is unverified, and no
hook mechanism exists to port the bash-guard defense-in-depth.

* fix(providers): containment barrier on usage.json reads (code scanning)

CodeQL flagged the codex usage read as path injection — correctly:
os.path.basename does not neutralize '..', and the upstream segment
validator isn't in CodeQL's taint model. The grok/codex reads collapse
into one _read_usage_json_contained helper that resolves the built path
and refuses anything outside the resolved usage root — a hostile id can
never escape regardless of upstream drift. Traversal + containment
regression tests added; a stray noqa in the test file replaced with a
named constant per repo rule.

* fix(providers): use realpath+startswith containment CodeQL recognizes

The is_relative_to() guard was a real barrier but not in CodeQL's
py/path-injection sanitizer model, so the alert persisted. Switch to
the canonical os.path.realpath + startswith(root + os.sep) form, which
CodeQL recognizes as a path-traversal barrier; behavior is identical
(refuse any candidate resolving outside the usage root).

* fix(providers): regexp-allowlist the usage-id segment (CodeQL barrier)

Neither is_relative_to nor realpath+startswith was recognized by
CodeQL's py/path-injection sanitizer model across the str->Path->open
flow. Sanitize the tainted component at the source instead: the id must
fullmatch a strict slug token ([A-Za-z0-9][A-Za-z0-9._-]*, no
separators, no '..'), which CodeQL recognizes as a path-injection
barrier; the realpath+startswith containment stays as defense-in-depth.

* fix(providers): standalone regexp guard so CodeQL recognizes the barrier

The sanitizer was one disjunct of a compound 'or' condition, which
CodeQL's guard analysis does not trace as a barrier. Split the regexp
fullmatch into its own single-condition guard (the redundant '..' check
is dropped — the required alphanumeric first char already excludes it).

---------

Co-authored-by: Renn F <rennf93@users.noreply.github.com>

.github/workflows/release.yml

@@ -116,6 +116,7 @@ jobs:
             [roboco-agent-pr-reviewer]=docker/agent-pr-reviewer.Dockerfile
             [roboco-agent-grok-prompter]=docker/agent-grok-prompter.Dockerfile
             [roboco-agent-grok-secretary]=docker/agent-grok-secretary.Dockerfile
+            [roboco-agent-codex]=docker/agent-codex.Dockerfile
           )
           for name in "${!IMAGES[@]}"; do
             echo "::group::build ${name}"

alembic/versions/083_seed_openai_provider.py

@@ -0,0 +1,84 @@
+"""Idempotently seed the Codex (OpenAI) provider row.
+
+The ``modelprovider`` enum has carried ``'openai'`` since migration
+`004_provider_routing`, but no row was ever seeded for it (unlike GROK's
+`039_seed_grok_provider`) — so any assignment of a catalog model whose
+`provider_type` is OPENAI (`gpt-5.3-codex`) raised `NotFoundError` out of
+`ModelRoutingService._get_seeded_provider`, making the whole Codex provider
+unreachable via the panel the moment an operator tried to route an agent to
+it. This migration is that missing seed.
+
+Unlike GROK's row (seeded `enabled=false`, flipped to `true` only by the
+dedicated `apply_mode="grok"` write path), this row seeds `enabled=true`
+directly: there is no `apply_mode="codex"` button — the only way to route to
+Codex is "mix" mode's per-agent picker, which has no equivalent enable step.
+Seeding disabled would leave `resolve_for_agent` silently falling back to the
+legacy Anthropic path forever (`resolved.provider.enabled` gates the route),
+reproducing the exact "silently unreachable" failure this migration exists to
+fix. Codex authenticates via a mounted ChatGPT-subscription `~/.codex`
+directory (see `roboco.llm.providers.codex.CodexCliProvider`), not a stored
+API key, so there is no secret to withhold behind a disabled row anyway —
+`base_url` is seeded for display parity with GROK's row but is blanked before
+the container mount just the same (never used for auth).
+
+Revision ID: 083_seed_openai_provider
+Revises: 082_routing_presets
+Create Date: 2026-07-23
+
+Note: chains onto ``082_routing_presets``, a sibling branch's revision that
+does not exist in this worktree (this branch was cut before it landed) — the
+same expected-failure posture ``081_doctrine_version`` reported for
+``080_task_project_budgets``. The local migration-graph AND enum-parity tests
+are expected to fail here until this branch integrates alongside 082:
+`test_migration_graph_integrity.py` (dangling down_revision, two heads, an
+unreachable-root walk) and `test_enum_migration_parity.py` (which shells out
+to `alembic upgrade head --sql` and hits the same missing revision id as a
+subprocess `KeyError`, not just a static graph-file check). Re-verify the
+chain resolves to one head at merge time.
+"""
+
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+revision = "083_seed_openai_provider"
+down_revision = "082_routing_presets"
+branch_labels: dict[str, str] | None = None
+depends_on: dict[str, str] | None = None
+
+
+def upgrade() -> None:
+    op.execute(
+        sa.text(
+            """
+            INSERT INTO provider_configs
+                (id, name, type, base_url, auth_token_encrypted, enabled, created_at)
+            VALUES
+                (
+                    gen_random_uuid(),
+                    'Codex (OpenAI)',
+                    'openai',
+                    'https://api.openai.com/v1',
+                    NULL,
+                    true,
+                    now()
+                )
+            ON CONFLICT (name) DO NOTHING
+            """
+        )
+    )
+
+
+def downgrade() -> None:
+    # Drop model_assignments pointing at the Codex row first to avoid a FK
+    # RESTRICT violation on provider_configs.id.
+    op.execute(
+        sa.text(
+            "DELETE FROM model_assignments "
+            "WHERE provider_config_id IN ("
+            "    SELECT id FROM provider_configs WHERE name = 'Codex (OpenAI)'"
+            ")"
+        )
+    )
+    op.execute(sa.text("DELETE FROM provider_configs WHERE name = 'Codex (OpenAI)'"))

docker-compose.registry.yml

@@ -278,6 +278,13 @@ services:
     entrypoint: ["/bin/sh", "-c", "echo 'agent-grok-secretary image present'"]
     restart: "no"
 
+  # Codex (OpenAI, official CLI) — one-shot delivery roles only, no
+  # interactive prompter/secretary variant in V1.
+  agent-codex-image:
+    image: ${ROBOCO_REGISTRY:-ghcr.io/rennf93}/roboco-agent-codex:${ROBOCO_VERSION:-latest}
+    entrypoint: ["/bin/sh", "-c", "echo 'agent-codex image present'"]
+    restart: "no"
+
   # Sandbox PG (kitchen-sink) — pulled by the provisioner when a venture opts
   # into pg extensions. Bare sandboxes use the upstream postgres image, so this
   # is only needed by extension-using projects.
@@ -349,6 +356,9 @@ services:
       # SuperGrok auth (host ~/.grok) for Grok-CLI agents — the orchestrator
       # mounts <dir>/auth.json into each Grok agent. Run `grok login` on the host.
       ROBOCO_HOST_GROK_DIR: ${ROBOCO_HOST_GROK_DIR:-${HOME}/.grok}
+      # ChatGPT-subscription auth (host ~/.codex) for Codex-CLI agents — same
+      # shape as ROBOCO_HOST_GROK_DIR. Run `codex login` on the host.
+      ROBOCO_HOST_CODEX_DIR: ${ROBOCO_HOST_CODEX_DIR:-${HOME}/.codex}
       ROBOCO_HOST_DATA_DIR: ${ROBOCO_HOST_DATA_DIR:-/opt/roboco/data}
       # Reachable base URL for commit-trailer links — set to your host's LAN
       # address or domain so the links in commit bodies resolve.
@@ -450,6 +460,8 @@ services:
       # auto-refreshes the ~6h token in place (grok_auth.refresh_if_stale) so
       # agents never mount a dead credential; the agent's own mount stays RO.
       - ${ROBOCO_HOST_GROK_DIR:-${HOME}/.grok}:${ROBOCO_HOST_GROK_DIR:-${HOME}/.grok}
+      # Codex CLI auth — same shape as the SuperGrok mount above.
+      - ${ROBOCO_HOST_CODEX_DIR:-${HOME}/.codex}:${ROBOCO_HOST_CODEX_DIR:-${HOME}/.codex}
       - ${ROBOCO_DATA_DIR:-./data}/mcp-configs:/app/mcp-configs
       - ${ROBOCO_DATA_DIR:-./data}/vault:/app/vault
       - ${ROBOCO_DATA_DIR:-./data}/prompts-generated:/app/prompts-generated
@@ -457,6 +469,8 @@ services:
       - ${ROBOCO_DATA_DIR:-./data}/workspaces:/data/workspaces
       # Per-agent GROK usage capture (usage.json -> finalizer).
       - ${ROBOCO_DATA_DIR:-./data}/grok-usage:/data/grok-usage
+      # Per-agent CODEX usage capture — same shape as grok-usage above.
+      - ${ROBOCO_DATA_DIR:-./data}/codex-usage:/data/codex-usage
       - ${ROBOCO_DATA_DIR:-./data}/logs:/data/logs
       # video engine: NAS-only bind mount, off by default in public registry.
       # Uncomment + set ROBOCO_VIDEO_ENGINE_ENABLED=true in .env to arm.

docker-compose.yaml

@@ -391,6 +391,20 @@ services:
     depends_on:
       - agent-grok-image
 
+  # ==========================================================================
+  # Agent Codex Image Builder (OpenAI via the official codex CLI). One-shot
+  # delivery roles only in V1 — no interactive prompter/secretary variant.
+  # ==========================================================================
+  agent-codex-image:
+    build:
+      context: .
+      dockerfile: docker/agent-codex.Dockerfile
+    image: roboco-agent-codex
+    entrypoint: ["/bin/sh", "-c", 'echo "Agent Codex image built"']
+    restart: "no"
+    depends_on:
+      - agent-base-image
+
   # ==========================================================================
   # Sandbox PG Image Builder (kitchen-sink postgres for parameterized dev DBs)
   # Only pulled by the provisioner when a venture requests pg extensions; bare
@@ -474,6 +488,9 @@ services:
       # SuperGrok auth (host ~/.grok) for Grok-CLI agents — the orchestrator
       # mounts <dir>/auth.json into each Grok agent. Run `grok login` on the host.
       ROBOCO_HOST_GROK_DIR: ${ROBOCO_HOST_GROK_DIR:-/home/renzof/.grok}
+      # ChatGPT-subscription auth (host ~/.codex) for Codex-CLI agents — same
+      # shape as ROBOCO_HOST_GROK_DIR. Run `codex login` on the host.
+      ROBOCO_HOST_CODEX_DIR: ${ROBOCO_HOST_CODEX_DIR:-/home/renzof/.codex}
       ROBOCO_HOST_DATA_DIR: ${ROBOCO_HOST_DATA_DIR:-/volume1/roboco/data}
       # Public base URL for commit-trailer links. Default 127.0.0.1 produces
       # unusable links in commit message bodies; set to NAS LAN IP so
@@ -669,6 +686,10 @@ services:
       # (grok_auth.refresh_if_stale) so agents never mount a dead credential;
       # each agent's own auth.json mount stays read-only.
       - ${ROBOCO_HOST_GROK_DIR:-/home/renzof/.grok}:${ROBOCO_HOST_GROK_DIR:-/home/renzof/.grok}
+      # Codex CLI auth — same shape as the SuperGrok mount above. Read-WRITE:
+      # the orchestrator auto-refreshes the access token in place
+      # (codex_auth.refresh_if_stale); each agent's own mount stays read-only.
+      - ${ROBOCO_HOST_CODEX_DIR:-/home/renzof/.codex}:${ROBOCO_HOST_CODEX_DIR:-/home/renzof/.codex}
       # Shared config directory for MCP configs (writable)
       - ${ROBOCO_DATA_DIR:-./data}/mcp-configs:/app/mcp-configs
       - ${ROBOCO_DATA_DIR:-./data}/vault:/app/vault
@@ -681,6 +702,8 @@ services:
       # Per-agent GROK usage capture: each Grok agent writes usage.json under
       # <agent_id>/; the finalizer reads the captured tokens/cost back here.
       - ${ROBOCO_DATA_DIR:-./data}/grok-usage:/data/grok-usage
+      # Per-agent CODEX usage capture — same shape as grok-usage above.
+      - ${ROBOCO_DATA_DIR:-./data}/codex-usage:/data/codex-usage
       # Persistent logs — survive `docker compose down/up`. Orchestrator and
       # each spawned agent write structured logs here so we can audit past
       # runs instead of relying on ephemeral `docker logs`.

docker-compose.yml

@@ -391,6 +391,20 @@ services:
     depends_on:
       - agent-grok-image
 
+  # ==========================================================================
+  # Agent Codex Image Builder (OpenAI via the official codex CLI). One-shot
+  # delivery roles only in V1 — no interactive prompter/secretary variant.
+  # ==========================================================================
+  agent-codex-image:
+    build:
+      context: .
+      dockerfile: docker/agent-codex.Dockerfile
+    image: roboco-agent-codex
+    entrypoint: ["/bin/sh", "-c", 'echo "Agent Codex image built"']
+    restart: "no"
+    depends_on:
+      - agent-base-image
+
   # ==========================================================================
   # Sandbox PG Image Builder (kitchen-sink postgres for parameterized dev DBs)
   # Only pulled by the provisioner when a venture requests pg extensions; bare
@@ -474,6 +488,9 @@ services:
       # SuperGrok auth (host ~/.grok) for Grok-CLI agents — the orchestrator
       # mounts <dir>/auth.json into each Grok agent. Run `grok login` on the host.
       ROBOCO_HOST_GROK_DIR: ${ROBOCO_HOST_GROK_DIR:-/home/renzof/.grok}
+      # ChatGPT-subscription auth (host ~/.codex) for Codex-CLI agents — same
+      # shape as ROBOCO_HOST_GROK_DIR. Run `codex login` on the host.
+      ROBOCO_HOST_CODEX_DIR: ${ROBOCO_HOST_CODEX_DIR:-/home/renzof/.codex}
       ROBOCO_HOST_DATA_DIR: ${ROBOCO_HOST_DATA_DIR:-/volume1/roboco/data}
       # Public base URL for commit-trailer links. Default 127.0.0.1 produces
       # unusable links in commit message bodies; set to NAS LAN IP so
@@ -669,6 +686,10 @@ services:
       # (grok_auth.refresh_if_stale) so agents never mount a dead credential;
       # each agent's own auth.json mount stays read-only.
       - ${ROBOCO_HOST_GROK_DIR:-/home/renzof/.grok}:${ROBOCO_HOST_GROK_DIR:-/home/renzof/.grok}
+      # Codex CLI auth — same shape as the SuperGrok mount above. Read-WRITE:
+      # the orchestrator auto-refreshes the access token in place
+      # (codex_auth.refresh_if_stale); each agent's own mount stays read-only.
+      - ${ROBOCO_HOST_CODEX_DIR:-/home/renzof/.codex}:${ROBOCO_HOST_CODEX_DIR:-/home/renzof/.codex}
       # Shared config directory for MCP configs (writable)
       - ${ROBOCO_DATA_DIR:-./data}/mcp-configs:/app/mcp-configs
       - ${ROBOCO_DATA_DIR:-./data}/vault:/app/vault
@@ -681,6 +702,8 @@ services:
       # Per-agent GROK usage capture: each Grok agent writes usage.json under
       # <agent_id>/; the finalizer reads the captured tokens/cost back here.
       - ${ROBOCO_DATA_DIR:-./data}/grok-usage:/data/grok-usage
+      # Per-agent CODEX usage capture — same shape as grok-usage above.
+      - ${ROBOCO_DATA_DIR:-./data}/codex-usage:/data/codex-usage
       # Persistent logs — survive `docker compose down/up`. Orchestrator and
       # each spawned agent write structured logs here so we can audit past
       # runs instead of relying on ephemeral `docker logs`.

docker/agent-codex.Dockerfile

@@ -0,0 +1,52 @@
+# Codex (OpenAI) Agent Image
+# =============================================================================
+# Runs OpenAI's Codex agent through the official `codex` CLI, authenticated by a
+# ChatGPT subscription via a mounted ~/.codex/auth.json — the parity analogue of
+# the Grok path's mounted ~/.grok (no metered API key). Reuses the base image's
+# roboco venv + uv + the RoboCo MCP gateway servers. The entrypoint renders
+# ~/.codex/config.toml (the gateway) + the execpolicy deny rules + the per-role
+# sandbox flag from the mounted mcp-config.json (see
+# roboco.llm.providers.codex_cli_config) and runs the CLI headless. One runtime
+# image serves every one-shot delivery role — role behaviour comes from the
+# mounted system prompt / manifest / mcp-config, exactly as on the grok path.
+#
+# V1 scope: no interactive intake/secretary variant of this image exists (unlike
+# grok's agent-grok-prompter / agent-grok-secretary) — Codex is one-shot delivery
+# roles only for now.
+# =============================================================================
+
+FROM roboco-agent-base
+
+USER root
+
+# Install the official codex CLI for the agent user. Pinned — untrusted model
+# output runs under it, so bump the version deliberately, never float. Download
+# the installer to a file first (a `curl | bash` pipe hides a curl failure as a
+# silent no-op) and verify the binary installed AND runs, so a broken install
+# fails the build here, not at spawn. (curl/bash from the base.)
+ARG CODEX_CLI_VERSION=0.145.0
+RUN su agent -s /bin/bash -c "set -euo pipefail; export HOME=/home/agent; \
+      curl -fsSL https://chatgpt.com/codex/install.sh -o /tmp/codex-install.sh; \
+      bash /tmp/codex-install.sh ${CODEX_CLI_VERSION}; \
+      test -x /home/agent/.codex/bin/codex || command -v codex; \
+      codex --version" \
+    && rm -rf /tmp/*
+
+# Entrypoint: render ~/.codex/config.toml + execpolicy rules + the per-role
+# sandbox flag, then run codex headless (overrides the base image's `claude`
+# entrypoint). ~/.codex is already agent:agent-owned (installed above via
+# `su agent`), so no chown needed here.
+COPY docker/scripts/codex-cli-agent-entrypoint.sh /app/scripts/codex-cli-agent-entrypoint.sh
+RUN chmod 0755 /app/scripts/codex-cli-agent-entrypoint.sh
+
+USER agent
+
+# codex installs to ~/.codex/bin (or ~/.local/bin, depending on the installer);
+# put both ahead of the venv on PATH so the entrypoint finds `codex` (and still
+# resolves `python` to /app/.venv/bin).
+ENV PATH="/home/agent/.codex/bin:/home/agent/.local/bin:/app/.venv/bin:$PATH"
+
+LABEL role="codex-cli-runtime"
+LABEL description="Codex (OpenAI) agent runtime — Codex Build via the official codex CLI"
+
+ENTRYPOINT ["/app/scripts/codex-cli-agent-entrypoint.sh"]

docker/scripts/codex-cli-agent-entrypoint.sh

@@ -0,0 +1,123 @@
+#!/usr/bin/env bash
+# Entrypoint for the roboco-agent-codex image (one-shot delivery roles only —
+# see docker/agent-codex.Dockerfile for the V1 scope note).
+#
+# Runs an agent on OpenAI's official `codex` CLI, authenticated by a ChatGPT
+# subscription via a mounted ~/.codex/auth.json — the parity analogue of the
+# grok-cli entrypoint's mounted ~/.grok. The gateway, identity, and workspace
+# are mounted by the orchestrator's shared container assembly (the same that
+# wires Claude/grok); this entrypoint renders the codex runtime config from
+# that mount and runs the CLI headless.
+set -euo pipefail
+
+# Render ~/.codex/config.toml (the MCP gateway) + the execpolicy deny rules +
+# the combined system+task prompt + the per-role sandbox flag. Run from /app so
+# `python -m` resolves the INSTALLED roboco package: dev/doc/qa agents run at
+# their workspace-clone cwd, whose own roboco/ dir would shadow it on the
+# sys.path front (the same ModuleNotFound lesson the grok entrypoint documents).
+( cd /app && python -m roboco.llm.providers.codex_cli_config )
+
+CODEX_ARGS_FILE="${ROBOCO_CODEX_ARGS_FILE:-/tmp/roboco-codex-args}"
+mapfile -t CODEX_ARGS < "$CODEX_ARGS_FILE"
+
+CODEX_PROMPT_FILE="${ROBOCO_CODEX_PROMPT_FILE:-/tmp/roboco-codex-prompt.txt}"
+
+# Prompt-injection guard (parity with the Claude/grok path): the task prompt is
+# DATA, not instructions — refuse a poisoned one before the model ever sees the
+# combined prompt file the render step above wrote. Screens the RAW task
+# prompt only (the composed role blueprint folded into that file is already
+# trusted), same scope as the grok guard call. Run from /app too.
+if ! ( cd /app && python -m roboco.agent_sdk.prompt_guard "${ROBOCO_INITIAL_PROMPT:-}" ); then
+  echo "Refusing to run: task prompt matched a prompt-injection pattern." >&2
+  exit 1
+fi
+
+# Auth fail-fast guard. The Codex CLI self-refreshes the access token in-process
+# when it notices the JWT is within 5 minutes of expiry, but our per-agent mount
+# is read-only, so that in-container write silently fails and only the
+# in-memory token survives for this one run. The orchestrator refreshes the
+# host token on a loop; this is the in-container backstop: exit 78 (EX_CONFIG)
+# immediately so _handle_stopped_container surfaces it, instead of the CLI
+# hanging or failing deep into the run on an expired credential.
+#
+# The orchestrator mounts the host ~/.codex DIRECTORY read-only at
+# /home/agent/.codex-auth-ro (a single-file bind mount would pin the inode, so
+# the atomic auth.json refresh would never reach a running container — same
+# concern the grok entrypoint documents). Symlink ~/.codex/auth.json at that RO
+# mount so codex + the --check backstop read the LIVE credential, while
+# codex's own writable state (config.toml, rules/, sessions/) still lands in
+# the image's own ~/.codex. `rm -f` first in case the image baked a stub.
+rm -f /home/agent/.codex/auth.json
+ln -s /home/agent/.codex-auth-ro/auth.json /home/agent/.codex/auth.json
+if ! ( cd /app && python -m roboco.llm.providers.codex_auth --check ); then
+  echo "[codex] auth token missing or expired — refusing to run. Refresh" \
+    "~/.codex/auth.json (orchestrator auto-refresh or 'codex login' on the" \
+    "host)." >&2
+  exit 78
+fi
+
+# Run the agent. `< /dev/null` keeps the headless run from blocking on stdin.
+# We do NOT `exec`: the script regains control to inspect the result + exit
+# code. The container's cwd is already the agent's workspace (the orchestrator
+# sets it via docker run -w, mirroring the Claude/grok path) — no --cwd flag is
+# passed. The combined system+task prompt (from the render step above) is read
+# via command substitution into a single quoted argv token, never re-parsed by
+# the shell — the same injection-safety property as the grok path's env-var
+# prompt passing.
+RUN_LOG="/tmp/codex-run.jsonl"
+ERR_LOG="/tmp/codex-run.err"
+COMBINED_PROMPT="$(cat "$CODEX_PROMPT_FILE" 2>/dev/null || true)"
+
+# `--json` streams typed JSONL to stdout; `tee` shows it live via `docker logs`
+# (parity with the Claude/grok path's live streaming) while ALSO capturing it
+# to RUN_LOG for the usage-capture read below. stderr goes to ERR_LOG and is
+# surfaced after the run.
+set +e
+codex exec "$COMBINED_PROMPT" \
+  -m "${ROBOCO_AGENT_MODEL:-gpt-5.3-codex}" \
+  --json \
+  "${CODEX_ARGS[@]}" \
+  < /dev/null 2> "$ERR_LOG" | tee "$RUN_LOG"
+run_rc=${PIPESTATUS[0]}
+set -e
+[ -s "$ERR_LOG" ] && cat "$ERR_LOG" >&2
+
+# Capture token usage from the run's own captured JSONL (turn.completed.usage
+# carries a real input/output/cache split — see codex_cli_usage). Best-effort;
+# never fails the run. Run from /app for the same module-resolution reason as
+# the render above.
+( cd /app && ROBOCO_CODEX_RUN_LOG="$RUN_LOG" \
+    python -m roboco.llm.providers.codex_cli_usage ) || true
+
+# Codex has NO exit-code taxonomy — every failure exits 1, so a rate-limit or
+# an expired-mid-run auth failure looks identical to any other error at the
+# process level. Classify the run WITHOUT scanning the full transcript: the
+# model's own on-topic prose can false-positive a raw grep by construction
+# (this repo's own role prompts use the phrase "quota-limited"; a commit hash
+# or item content can contain "429"; the panel has a literal login page) —
+# codex_cli_sniff extracts ONLY the JSONL error.message fields (turn.failed /
+# any error-bearing event) plus stderr and classifies THAT, never stdout's
+# echoed model output. Mirrors the grok entrypoint's exit-75/78 convention so
+# the orchestrator's existing park-and-probe logic, scoped by provider_type,
+# handles both providers identically:
+#   - rate-limit/quota -> exit 75 (EX_TEMPFAIL): the orchestrator PARKS the
+#     provider instead of the dispatcher respawning the same task every tick.
+#   - auth failure (an expired/rotated token discovered mid-run, past the
+#     --check backstop above) -> exit 78 (EX_CONFIG): parked the same way as a
+#     pre-run auth miss.
+SNIFF="$( (cd /app && python -m roboco.llm.providers.codex_cli_sniff "$RUN_LOG" "$ERR_LOG") 2>/dev/null || true)"
+if [ "$SNIFF" = "rate_limit" ]; then
+  echo "[codex] rate-limited — exiting 75 so the orchestrator parks the" \
+    "provider; the task is retried when the limit lifts." >&2
+  exit 75
+fi
+if [ "$SNIFF" = "auth" ]; then
+  echo "[codex] auth failure detected mid-run — exiting 78 so the" \
+    "orchestrator parks the provider until the token is refreshed." >&2
+  exit 78
+fi
+
+# A graceful exit without a terminal verb is handled server-side by the
+# orchestrator (_handle_stopped_container substitutes the still-owned task) —
+# the codex-cli runtime needs no in-container SDK server for that.
+exit "$run_rc"

panel/src/components/settings/__tests__/ai-routing-card.test.tsx

@@ -45,6 +45,11 @@ const {
       provider_type: "grok",
       display_name: "Grok Build 0.1",
     },
+    {
+      model_name: "gpt-5.3-codex",
+      provider_type: "openai",
+      display_name: "GPT-5.3 Codex",
+    },
   ]),
   getOllamaKey: vi.fn(async () => ({ has_key: false, enabled: true })),
   setOllamaKey: vi.fn(async () => ({ has_key: true, enabled: true })),

panel/src/components/settings/ai-routing-card.tsx

@@ -276,6 +276,10 @@ export function AIRoutingCard() {
     (c: { provider_type: ModelProvider }) =>
       c.provider_type === ModelProvider.GROK,
   );
+  const catalogOpenaiOnly = catalog.filter(
+    (c: { provider_type: ModelProvider }) =>
+      c.provider_type === ModelProvider.OPENAI,
+  );
   const catalogAnthropicOnly = catalog.filter(
     (c: { provider_type: ModelProvider }) =>
       c.provider_type === ModelProvider.ANTHROPIC,
@@ -1033,6 +1037,29 @@ export function AIRoutingCard() {
                               </SelectGroup>
                             )}
 
+                            {/* Codex (OpenAI) models */}
+                            {catalogOpenaiOnly.length > 0 && (
+                              <SelectGroup>
+                                <SelectLabel>
+                                  <ProviderBadge variant="openai" />
+                                  Codex (OpenAI)
+                                </SelectLabel>
+                                {catalogOpenaiOnly.map(
+                                  (c: {
+                                    model_name: string;
+                                    display_name: string;
+                                  }) => (
+                                    <SelectItem
+                                      key={c.model_name}
+                                      value={c.model_name}
+                                    >
+                                      {c.display_name}
+                                    </SelectItem>
+                                  ),
+                                )}
+                              </SelectGroup>
+                            )}
+
                             {/* Ollama Cloud models */}
                             {catalogOllamaOnly.length > 0 && (
                               <SelectGroup>
@@ -1247,19 +1274,21 @@ function errMsg(e: unknown): string {
 function ProviderBadge({
   variant,
 }: {
-  variant: "anthropic" | "grok" | "ollama" | "self-hosted";
+  variant: "anthropic" | "grok" | "openai" | "ollama" | "self-hosted";
 }) {
   const styles: Record<string, string> = {
     anthropic: "bg-blue-500/20 text-blue-700 dark:text-blue-400",
     ollama: "bg-violet-500/20 text-violet-700 dark:text-violet-400",
     "self-hosted": "bg-purple-500/20 text-purple-700 dark:text-purple-400",
     grok: "bg-teal-500/20 text-teal-700 dark:text-teal-400",
+    openai: "bg-emerald-500/20 text-emerald-700 dark:text-emerald-400",
   };
   const labels: Record<string, string> = {
     anthropic: "A",
     ollama: "O",
     "self-hosted": "S",
     grok: "G",
+    openai: "C",
   };
   return (
     <span

panel/src/lib/api/providers.ts

@@ -26,9 +26,15 @@ export interface ModelAssignment {
   model_name: string;
 }
 
+// "codex" is READ-only (derive_mode can report it for a pure-OPENAI global
+// assignment) — there is no apply_mode="codex" write path, so no UI ever
+// constructs an ApplyModePayload with this value. One shared type (not a
+// split read/write pair) keeps this file small; nothing calls applyMode with
+// mode: "codex" since no button exists for it.
 export type RoutingMode =
   | "anthropic"
   | "grok"
+  | "codex"
   | "ollama"
   | "self_hosted"
   | "mix"

roboco/api/schemas/provider.py

@@ -201,9 +201,17 @@ class ApplyModeRequest(BaseModel):
 
 
 class ModeResponse(BaseModel):
-    """Server-side view of the current mode + a snapshot of active rules."""
+    """Server-side view of the current mode + a snapshot of active rules.
 
-    mode: Literal["anthropic", "grok", "ollama", "mix", "self_hosted", "cost_tiered"]
+    Read-only ``mode`` values are a superset of what ``ApplyModeRequest``
+    accepts: "codex" (OPENAI) can come back from `derive_mode()` (a pure-Codex
+    global assignment), but there is no `apply_mode="codex"` write path — mix
+    mode's per-agent picker is the only way to route to it.
+    """
+
+    mode: Literal[
+        "anthropic", "grok", "codex", "ollama", "mix", "self_hosted", "cost_tiered"
+    ]
     assignments: list[AssignmentResponse]
 
 
@@ -267,7 +275,9 @@ class RoutingPresetApplyResponse(BaseModel):
     `ModeResponse`) plus any per-entry skip notes (e.g. a since-removed
     catalog model) — never a partial/silent apply."""
 
-    mode: Literal["anthropic", "grok", "ollama", "mix", "self_hosted", "cost_tiered"]
+    mode: Literal[
+        "anthropic", "grok", "codex", "ollama", "mix", "self_hosted", "cost_tiered"
+    ]
     assignments: list[AssignmentResponse]
     skipped: list[str]
 

roboco/billing/pricing.py

@@ -8,7 +8,9 @@ Pricing is provider-aware. A model name resolves to one of four cases:
 
 * **Anthropic** — priced from the table below by substring match.
 * **Priced non-Anthropic** — xAI Grok (``grok-build-*``, billed per token via
-  the xAI API) is priced from the table too. Match by substring like the rest.
+  the xAI API) and OpenAI Codex (``gpt-5.3-codex``, a ChatGPT-subscription CLI
+  priced here for cost attribution, not because the subscription itself is
+  metered) are priced from the table too. Match by substring like the rest.
 * **Free non-Anthropic** — local self-hosted Ollama models (``ollama/`` prefix
   or bare model tags) and Ollama Cloud models (``:cloud`` tag). These have **no
   per-token cost**: local inference runs on owned hardware, and Ollama Cloud
@@ -64,6 +66,11 @@ _PRICING: list[tuple[str, float, float, float, float]] = [
     # read is $0.20/1M; xAI publishes no cache-write premium, so cache_write is
     # the normal input rate. https://docs.x.ai/developers/models
     ("grok-build", 1.00, 2.00, 0.20, 1.00),
+    # OpenAI Codex — priced non-Anthropic (per-token, ChatGPT-subscription CLI
+    # but priced as if metered for cost attribution). Cached-input read is
+    # $0.175/1M; OpenAI publishes no cache-write premium, so cache_write is
+    # the normal input rate (same convention as grok-build above).
+    ("gpt-5.3-codex", 1.75, 14.00, 0.175, 1.75),
     # Short aliases used in ROLE_MODEL_MAP / MODEL_MAP
     ("opus", 5.00, 25.00, 0.50, 6.25),
     ("sonnet", 3.00, 15.00, 0.30, 0.75),

roboco/config.py

@@ -11,6 +11,7 @@ import os
 import posixpath
 from collections.abc import Callable
 from functools import lru_cache
+from pathlib import Path
 from typing import Literal
 from urllib.parse import urlparse
 
@@ -1838,6 +1839,28 @@ class Settings(BaseSettings):
             "0 disables. Override via ROBOCO_GROK_MAX_COST_USD"
         ),
     )
+    # Host directory holding the Codex CLI's ChatGPT-subscription auth.json
+    # (from `codex login`), mounted read-only into each Codex agent — the
+    # parity analogue of ROBOCO_HOST_GROK_DIR. Unlike the grok path (a raw
+    # os.environ read in grok.py), this is a real Settings field per the
+    # Codex build directive, so it shows up in the settings schema.
+    host_codex_dir: str = Field(
+        default_factory=lambda: str(Path.home() / ".codex"),
+        description=(
+            "Host directory holding the Codex CLI subscription auth.json "
+            "(from `codex login`); mounted read-only into each Codex agent. "
+            "Override via ROBOCO_HOST_CODEX_DIR"
+        ),
+    )
+    # The codex CLI model id pinned at spawn (`codex exec -m <id>`). Codex has
+    # no reliable default model, so this must always be set explicitly.
+    codex_cli_model: str = Field(
+        default="gpt-5.3-codex",
+        description=(
+            "Codex CLI model id passed to `codex exec -m`; override via "
+            "ROBOCO_CODEX_CLI_MODEL"
+        ),
+    )
     # An interactive intake/secretary chat the human abandoned (closed the tab
     # without confirming/stopping) otherwise leaks its container until the
     # orchestrator restarts. The sweeper reaps a live session whose

roboco/llm/providers/__init__.py

@@ -10,16 +10,21 @@ Backends:
   also serves Ollama Cloud / self-hosted via ``ANTHROPIC_BASE_URL`` injection).
 - :class:`GrokCliProvider` — xAI Grok Build via the official ``grok`` CLI on the
   SuperGrok subscription (mounted ``~/.grok`` auth, parity with the Claude path).
+- :class:`CodexCliProvider` — OpenAI via the official ``codex`` CLI on a ChatGPT
+  subscription (mounted ``~/.codex`` auth, same shape). One-shot delivery roles
+  only in V1 — no interactive intake/secretary support.
 """
 
 from roboco.llm.providers.base import AgentProvider, ProviderError, SpawnResult
 from roboco.llm.providers.claude_code import ClaudeCodeProvider
+from roboco.llm.providers.codex import CodexCliProvider
 from roboco.llm.providers.grok import GrokCliProvider
 from roboco.llm.providers.registry import ProviderNotRegisteredError, ProviderRegistry
 
 __all__ = [
     "AgentProvider",
     "ClaudeCodeProvider",
+    "CodexCliProvider",
     "GrokCliProvider",
     "ProviderError",
     "ProviderNotRegisteredError",

roboco/llm/providers/codex.py

@@ -0,0 +1,239 @@
+"""Codex CLI provider — OpenAI via the official ``codex`` CLI.
+
+OpenAI ships an official terminal coding agent (the ``codex`` CLI) authenticated
+by a ChatGPT subscription. RoboCo runs Codex agents on it the same way it runs
+Grok agents on ``grok``: the orchestrator's shared container assembly mounts
+the RoboCo MCP gateway (``mcp-config.json``), the agent HMAC identity, and the
+git context; this provider adds the subscription auth mount (``~/.codex``) and
+the runtime env the codex-cli entrypoint reads, then launches the
+``roboco-agent-codex`` image — whose entrypoint renders ``~/.codex/config.toml``
++ execpolicy rules + the per-role sandbox flag (see
+:mod:`roboco.llm.providers.codex_cli_config`) and runs ``codex exec --json``
+headless.
+
+Two things differ from the Claude Code spawn (mirroring
+:mod:`roboco.llm.providers.grok`):
+  1. **Auth** — the host's ``~/.codex`` (subscription credential from ``codex
+     login``) is mounted instead of relying on a provider key; no OpenAI API
+     key is used. The provider routing fields are blanked before the shared
+     mount step so the shared builder never injects them as ``ANTHROPIC_*``
+     (the wrong runtime) — codex authenticates from the mounted ``~/.codex``.
+  2. **Runtime** — the ``roboco-agent-codex`` image (codex CLI) instead of
+     ``claude``.
+
+The initial prompt is passed via an **env var, not a positional CLI arg**
+(the entrypoint folds it into the rendered combined-prompt file), which
+structurally avoids a flag-injection vector.
+
+**V1 scope**: one-shot delivery roles only (developer / qa / documenter /
+cell_pm / main_pm / pr_reviewer / board). No interactive intake/secretary
+support — there is no ``roboco-agent-codex-prompter`` / ``-secretary`` image,
+unlike grok's interactive pair.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import dataclasses
+import logging
+from pathlib import Path
+from typing import TYPE_CHECKING, Protocol
+
+from roboco.config import settings
+from roboco.llm.providers._docker import container_running, stop_container
+from roboco.llm.providers.base import AgentProvider, ProviderError, SpawnResult
+
+if TYPE_CHECKING:
+    from roboco.models.runtime import OrchestratorAgentConfig as AgentConfig
+
+_log = logging.getLogger(__name__)
+
+# The Codex agent image (own image, like every other agent role).
+_DEFAULT_CODEX_IMAGE = "roboco-agent-codex:latest"
+
+# The codex CLI model id, pinned — codex has no reliable default model.
+_CODEX_CLI_MODEL = settings.codex_cli_model
+
+# Host directory holding the ChatGPT-subscription auth (from `codex login`).
+# Mounted into the agent's ~/.codex like the grok path mounts ~/.grok.
+CODEX_AUTH_HOST_PATH = settings.host_codex_dir
+
+# In-container paths.
+_MCP_CONFIG_IN_CONTAINER = "/app/mcp-config.json"
+# The host ~/.codex DIRECTORY (not a single auth.json file) is mounted RO
+# here: a single-file bind mount pins the inode, so the orchestrator's atomic
+# tmp+rename refresh (codex_auth.refresh_if_stale) never reaches a running
+# container — the exact concern grok's auth mount documents. The entrypoint
+# symlinks ~/.codex/auth.json -> this RO mount; codex's writable state
+# (config.toml, rules/, sessions/) lives in the image's own ~/.codex.
+_CODEX_AUTH_DIR_IN_CONTAINER = "/home/agent/.codex-auth-ro"
+# Per-agent data dir (the host side is reused from the shared assembly): the
+# entrypoint writes the captured token usage here so the orchestrator reads it
+# back at finalize, the codex analogue of the mounted Claude transcript.
+_CODEX_USAGE_DIR_IN_CONTAINER = "/home/agent/.codex-usage"
+_CODEX_USAGE_FILE_IN_CONTAINER = f"{_CODEX_USAGE_DIR_IN_CONTAINER}/usage.json"
+
+
+def _container_name(agent_id: str) -> str:
+    return f"roboco-agent-{agent_id}"
+
+
+class _CodexHost(Protocol):
+    """The orchestrator surface CodexCliProvider reuses for container assembly.
+
+    Typed as a Protocol so this module never imports ``AgentOrchestrator`` (no
+    import cycle) and is trivially mockable in tests.
+    """
+
+    async def _remove_container(
+        self, container_name: str, *, stop_reason: str | None = None
+    ) -> None: ...
+
+    def _ensure_codex_usage_dir(self, agent_id: str) -> None: ...
+
+    def _resolve_host_paths(
+        self, config: AgentConfig, agent_settings_path: Path | None
+    ) -> dict[str, str | None]: ...
+
+    def _build_mount_args(
+        self,
+        container_name: str,
+        config: AgentConfig,
+        hosts: dict[str, str | None],
+    ) -> list[str]: ...
+
+    def _append_agent_auth_env(self, cmd: list[str], config: AgentConfig) -> None: ...
+
+    def _append_git_context_env(self, cmd: list[str], config: AgentConfig) -> None: ...
+
+
+class CodexCliProvider(AgentProvider):
+    """Spawn a Codex (OpenAI, official CLI) agent as a gateway-wired container."""
+
+    def __init__(self, host: _CodexHost, image: str | None = None) -> None:
+        self._host = host
+        self._image = image or _DEFAULT_CODEX_IMAGE
+
+    async def spawn(
+        self,
+        config: AgentConfig,
+        initial_prompt: str | None = None,
+        agent_settings_path: Path | None = None,
+    ) -> SpawnResult:
+        if not config.mcp_config_path:
+            raise ProviderError(
+                "OPENAI spawn requires an MCP config (gateway access).",
+                agent_id=config.agent_id,
+            )
+
+        container_name = _container_name(config.agent_id)
+        await self._host._remove_container(
+            container_name, stop_reason="pre_spawn_stale_clear"
+        )
+        # Pre-create the per-agent data dir (world-writable) before the bind
+        # mount so the non-root agent can write the usage file (else EACCES).
+        self._host._ensure_codex_usage_dir(config.agent_id)
+
+        # Reuse the orchestrator's mount/auth/git assembly so the agent gets
+        # the full MCP gateway + identity wiring. Blank the provider routing
+        # fields first: otherwise the shared builder would inject the
+        # provider endpoint as ANTHROPIC_BASE_URL/AUTH_TOKEN — codex
+        # authenticates from the mounted ~/.codex, not a provider key.
+        mount_config = dataclasses.replace(
+            config, provider_base_url=None, provider_auth_token=None
+        )
+        hosts = self._host._resolve_host_paths(config, agent_settings_path)
+        cmd = self._host._build_mount_args(container_name, mount_config, hosts)
+        self._host._append_agent_auth_env(cmd, config)
+        self._host._append_git_context_env(cmd, config)
+        self._append_codex_auth_mount(cmd)
+        self._append_usage_mount(cmd, hosts)
+        self._append_codex_env(cmd, config, initial_prompt)
+        cmd.append(self._image)
+
+        proc = await asyncio.create_subprocess_exec(
+            *cmd,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE,
+        )
+        stdout, stderr = await proc.communicate()
+        if proc.returncode != 0:
+            raise ProviderError(
+                f"Failed to start Codex container: {stderr.decode().strip()}",
+                agent_id=config.agent_id,
+            )
+        return SpawnResult(
+            instance_id=container_name,
+            extra={"container_id": stdout.decode().strip(), "model": _CODEX_CLI_MODEL},
+        )
+
+    @staticmethod
+    def _append_codex_auth_mount(cmd: list[str]) -> None:
+        """Mount the host's ChatGPT-subscription ``~/.codex`` directory (read-only).
+
+        The mount is the DIRECTORY, not the single ``auth.json`` file — a
+        single-file bind mount pins the inode, so the orchestrator's atomic
+        refresh (rename within the host ``~/.codex``) would never reach a
+        running container. See ``_CODEX_AUTH_DIR_IN_CONTAINER``.
+        """
+        auth_dir = Path(CODEX_AUTH_HOST_PATH)
+        if (auth_dir / "auth.json").exists():
+            cmd.extend(["-v", f"{auth_dir}:{_CODEX_AUTH_DIR_IN_CONTAINER}:ro"])
+        else:
+            # The mount is the codex subscription credential — without it the
+            # container starts but the entrypoint `--check` backstop refuses
+            # to run (exit 78) and the agent is doomed. Fail loud at spawn
+            # time so the operator sees the missing credential immediately.
+            _log.warning(
+                "codex host auth.json not found at %s — spawn will start the "
+                "container but it is doomed to exit 78 (no Codex credential). "
+                "Run `codex login` on the host (or set ROBOCO_HOST_CODEX_DIR to "
+                "the directory holding auth.json) before spawning Codex agents.",
+                auth_dir / "auth.json",
+            )
+
+    @staticmethod
+    def _append_usage_mount(cmd: list[str], hosts: dict[str, str | None]) -> None:
+        """Mount the per-agent data dir so the orchestrator reads usage back.
+
+        Reuses the shared per-agent host dir (``hosts["codex_usage"]``); the
+        entrypoint writes ``usage.json`` here after the run. Without it a
+        Codex agent finalizes at 0 tokens / $0.
+        """
+        data_host = hosts.get("codex_usage")
+        if data_host:
+            cmd.extend(["-v", f"{data_host}:{_CODEX_USAGE_DIR_IN_CONTAINER}"])
+
+    def _append_codex_env(
+        self, cmd: list[str], config: AgentConfig, initial_prompt: str | None
+    ) -> None:
+        """Append the runtime env the codex-cli entrypoint + renderer read.
+
+        ``ROBOCO_AGENT_ID`` lets the renderer compute the per-role sandbox
+        flag; ``ROBOCO_MCP_CONFIG`` points it at the mounted gateway config;
+        the prompt travels as an env var (never an argv positional) and the
+        renderer folds it into the combined system+task prompt file.
+        """
+        cmd.extend(
+            [
+                "-e",
+                f"ROBOCO_AGENT_ID={config.agent_id}",
+                "-e",
+                f"ROBOCO_AGENT_MODEL={_CODEX_CLI_MODEL}",
+                "-e",
+                f"ROBOCO_MCP_CONFIG={_MCP_CONFIG_IN_CONTAINER}",
+                "-e",
+                f"ROBOCO_INITIAL_PROMPT={initial_prompt or ''}",
+                "-e",
+                f"ROBOCO_CODEX_USAGE_FILE={_CODEX_USAGE_FILE_IN_CONTAINER}",
+            ]
+        )
+
+    async def stop(self, instance_id: str, graceful: bool = True) -> None:
+        await stop_container(instance_id, graceful)
+
+    async def health_check(self, instance_id: str) -> bool:
+        return await container_running(instance_id)
+
+    async def remove(self, instance_id: str) -> None:
+        await self._host._remove_container(instance_id)

roboco/llm/providers/codex_auth.py

@@ -0,0 +1,298 @@
+"""Keep the Codex CLI credential live so headless codex agents never hit an
+expired token.
+
+The Codex CLI (``codex``, OpenAI's official terminal coding agent) stores its
+ChatGPT-subscription credential at ``~/.codex/auth.json``: ``{auth_mode,
+OPENAI_API_KEY, tokens: {id_token, access_token, refresh_token, account_id},
+last_refresh}``. ``access_token`` is a JWT whose ``exp`` claim is the
+authoritative expiry — unlike grok's bundle, this file carries no separate
+``expires_at`` field, so staleness is decided by decoding the JWT itself. The
+CLI self-refreshes IN-PROCESS when it notices the token is within 5 minutes of
+expiry, but that only helps a container that can write back to its own
+``auth.json`` — our per-agent mount is read-only (the same inode-pinning
+concern as grok's mount, see :mod:`roboco.llm.providers.codex`), so an
+in-container refresh writes silently fail and the container falls back to the
+now-stale in-memory token for the rest of that one run only. The orchestrator
+owns the durable refresh: it holds the host file read-write and calls
+:func:`refresh_if_stale` on a loop, exactly like ``grok_auth``.
+
+The refresh-token grant posts to ``https://auth.openai.com/oauth/token``
+(verified). The grant's ``client_id`` is NOT part of the auth.json struct we
+were handed, so :data:`_DEFAULT_OAUTH_CLIENT_ID` is a best-effort default
+(the Codex CLI's own public, non-secret OAuth client id) — override with
+``ROBOCO_CODEX_OAUTH_CLIENT_ID`` if OpenAI rotates it; this is the one value
+in this module not drawn from the verified build facts, flagged here and in
+the build report for a human to confirm.
+
+The agent entrypoint calls ``--check`` as a backstop: if the mounted token is
+missing/expired it exits non-zero immediately instead of hanging at an
+interactive login flow.
+"""
+
+from __future__ import annotations
+
+import base64
+import contextlib
+import json
+import os
+import shutil
+import sys
+import threading
+from datetime import UTC, datetime
+from pathlib import Path
+from typing import TYPE_CHECKING, Any
+
+import httpx
+import structlog
+
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
+logger = structlog.get_logger(__name__)
+
+# Process-wide serialisation for the single-use refresh-token grant (parity
+# with grok_auth's #94 fix): two concurrent refreshes would have the loser
+# submit the now-invalidated old refresh_token and burn the credential. The
+# lock + re-load-and-recheck inside it makes the loser find the winner's
+# refreshed token and return "fresh" instead of re-rotating.
+_refresh_lock = threading.Lock()
+
+_TOKEN_ENDPOINT = "https://auth.openai.com/oauth/token"
+# Not part of the verified auth.json struct — see module docstring.
+_DEFAULT_OAUTH_CLIENT_ID = os.environ.get(
+    "ROBOCO_CODEX_OAUTH_CLIENT_ID", "app_EMoamEEZ73f0CkXaXp7hrann"
+)
+# Refresh when the access token expires within this window: a run that starts
+# inside it could outlive the token, so refresh proactively rather than at the
+# last second. Mirrors grok_auth's REFRESH_SKEW_SECONDS.
+REFRESH_SKEW_SECONDS = int(os.environ.get("ROBOCO_CODEX_AUTH_REFRESH_SKEW", "1800"))
+# A JWT is header.payload.signature; fewer parts means it isn't one.
+_MIN_JWT_PARTS = 2
+
+
+def default_auth_path() -> Path:
+    """The Codex ``auth.json`` for the current process HOME (``~/.codex``)."""
+    return Path.home() / ".codex" / "auth.json"
+
+
+def _load(auth_path: Path) -> dict[str, Any] | None:
+    try:
+        data = json.loads(auth_path.read_text(encoding="utf-8"))
+    except (OSError, json.JSONDecodeError):
+        return None
+    return data if isinstance(data, dict) else None
+
+
+def _tokens(bundle: dict[str, Any]) -> dict[str, Any]:
+    tokens = bundle.get("tokens")
+    return tokens if isinstance(tokens, dict) else {}
+
+
+def _exp_from_jwt(token: str) -> datetime | None:
+    """Decode the JWT ``exp`` claim (unix seconds) from an access token.
+
+    The Codex access token is a JWT whose ``exp`` is the ONLY expiry signal —
+    unlike grok's bundle there is no sibling ``expires_at`` field, so every
+    staleness check in this module goes through this decode. Returns ``None``
+    for an unparseable / non-JWT / claim-less token.
+    """
+    parts = token.split(".")
+    if len(parts) < _MIN_JWT_PARTS:
+        return None
+    payload_b64 = parts[1]
+    padding = "=" * (-len(payload_b64) % 4)
+    try:
+        payload = json.loads(base64.urlsafe_b64decode(payload_b64 + padding))
+    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(float(exp), tz=UTC)
+
+
+def seconds_until_expiry(
+    auth_path: Path, *, now: datetime | None = None
+) -> float | None:
+    """Seconds until the access token expires, or ``None`` if unreadable/absent."""
+    bundle = _load(auth_path)
+    if bundle is None:
+        return None
+    access_token = _tokens(bundle).get("access_token")
+    if not isinstance(access_token, str) or not access_token:
+        return None
+    expires_at = _exp_from_jwt(access_token)
+    if expires_at is None:
+        return None
+    return (expires_at - (now or datetime.now(UTC))).total_seconds()
+
+
+def is_valid(
+    auth_path: Path, *, skew_seconds: int = 0, now: datetime | None = None
+) -> bool:
+    """True when a token exists and has more than ``skew_seconds`` of life left."""
+    remaining = seconds_until_expiry(auth_path, now=now)
+    return remaining is not None and remaining > skew_seconds
+
+
+def _post_token(url: str, form: dict[str, str]) -> dict[str, Any]:
+    """POST the OAuth token request; return the parsed JSON body."""
+    response = httpx.post(url, data=form, timeout=30.0)
+    response.raise_for_status()
+    body = response.json()
+    return body if isinstance(body, dict) else {}
+
+
+def _atomic_write(auth_path: Path, bundle: dict[str, Any]) -> None:
+    """Rewrite ``auth.json`` atomically, preserving the original file mode.
+
+    The rotated refresh_token is single-use (OpenAI invalidates the old one the
+    instant it issues the new one), so losing this write loses the credential
+    permanently — the same F006 concern grok_auth documents. Atomic tmp+replace
+    first; a direct-write fallback if that fails, so the rotated token still
+    lands on disk. Only if BOTH fail does the OSError propagate.
+    """
+    payload = json.dumps(bundle)
+    tmp = auth_path.with_name(auth_path.name + ".refresh.tmp")
+    try:
+        tmp.write_text(payload, encoding="utf-8")
+        with contextlib.suppress(OSError):
+            shutil.copymode(auth_path, tmp)
+        tmp.replace(auth_path)
+        return
+    except OSError as exc:
+        logger.warning(
+            "codex auth atomic write failed; trying direct write", error=str(exc)
+        )
+    auth_path.write_text(payload, encoding="utf-8")
+
+
+def _is_stale(tokens: dict[str, Any], now: datetime, skew_seconds: int) -> bool:
+    """True when the token is unparseable or within ``skew_seconds`` of expiry."""
+    access_token = tokens.get("access_token")
+    if not isinstance(access_token, str) or not access_token:
+        return True
+    expires_at = _exp_from_jwt(access_token)
+    return expires_at is None or (expires_at - now).total_seconds() <= skew_seconds
+
+
+def _apply_refreshed_token(tokens: dict[str, Any], token: dict[str, Any]) -> None:
+    """Write the new access/refresh/id token into the ``tokens`` sub-object."""
+    tokens["access_token"] = token["access_token"]
+    if token.get("refresh_token"):
+        tokens["refresh_token"] = token["refresh_token"]
+    if token.get("id_token"):
+        tokens["id_token"] = token["id_token"]
+
+
+def _do_refresh(
+    auth_path: Path,
+    bundle: dict[str, Any],
+    now: datetime,
+    post: Callable[[str, dict[str, str]], dict[str, Any]],
+) -> str:
+    """Run the refresh-token grant and persist the result; returns the status."""
+    tokens = _tokens(bundle)
+    refresh_token = tokens.get("refresh_token")
+    if not refresh_token:
+        return "no_refresh_token"
+    try:
+        token = post(
+            _TOKEN_ENDPOINT,
+            {
+                "grant_type": "refresh_token",
+                "refresh_token": str(refresh_token),
+                "client_id": _DEFAULT_OAUTH_CLIENT_ID,
+            },
+        )
+    except Exception as exc:
+        logger.warning("codex auth refresh request failed", error=str(exc))
+        return "failed"
+    if not token.get("access_token"):
+        logger.warning("codex auth refresh returned no access_token")
+        return "failed"
+    _apply_refreshed_token(tokens, token)
+    bundle["tokens"] = tokens
+    bundle["last_refresh"] = now.astimezone(UTC).isoformat().replace("+00:00", "Z")
+    try:
+        _atomic_write(auth_path, bundle)
+    except OSError as exc:
+        logger.warning("codex auth refresh write failed", error=str(exc))
+        return "failed"
+    logger.info("codex auth refreshed")
+    return "refreshed"
+
+
+def _recheck_or_refresh(
+    auth_path: Path,
+    now: datetime,
+    skew_seconds: int,
+    post: Callable[[str, dict[str, str]], dict[str, Any]] | None,
+) -> str:
+    """Re-load + re-check staleness, then refresh — the locked body of refresh_if_stale.
+
+    Run inside ``_refresh_lock`` so a concurrent caller that waited on the lock
+    re-reads the bundle a single-writer just refreshed and returns ``fresh``
+    instead of re-POSTing the single-use refresh grant.
+    """
+    bundle = _load(auth_path)
+    if bundle is None:
+        return "missing"
+    tokens = _tokens(bundle)
+    if not tokens.get("refresh_token"):
+        return "no_refresh_token"
+    if not _is_stale(tokens, now, skew_seconds):
+        return "fresh"
+    return _do_refresh(auth_path, bundle, now, post or _post_token)
+
+
+def refresh_if_stale(
+    auth_path: Path,
+    *,
+    skew_seconds: int = REFRESH_SKEW_SECONDS,
+    now: datetime | None = None,
+    post: Callable[[str, dict[str, str]], dict[str, Any]] | None = None,
+) -> str:
+    """Mint a fresh access token from the refresh token if expiry is near.
+
+    Returns a status string: ``fresh`` (still valid, nothing done), ``refreshed``
+    (a new token was written), ``missing`` (no auth.json), ``no_refresh_token``
+    (an API-key-mode auth.json, or no usable credential), or ``failed`` (the
+    refresh request errored). Best-effort: never raises.
+    """
+    bundle = _load(auth_path)
+    if bundle is None:
+        return "missing"
+    tokens = _tokens(bundle)
+    if not tokens.get("refresh_token"):
+        return "no_refresh_token"
+    now = now or datetime.now(UTC)
+    if not _is_stale(tokens, now, skew_seconds):
+        return "fresh"
+    # Single-use refresh token: hold the lock and re-load + re-check inside it
+    # so a concurrent caller that waited on the lock finds the refreshed token
+    # and returns "fresh" instead of re-POSTing the grant (which would use the
+    # already-invalidated old token and burn the credential).
+    with _refresh_lock:
+        return _recheck_or_refresh(auth_path, now, skew_seconds, post)
+
+
+def main(argv: list[str] | None = None) -> int:
+    """CLI: ``--check`` for the entrypoint backstop, else refresh-if-stale.
+
+    ``--check`` exits non-zero when the mounted token is missing or expired (so
+    the agent entrypoint can refuse to run instead of hanging at an interactive
+    login flow). With no flag it refreshes the host token if stale.
+    """
+    args = argv if argv is not None else sys.argv[1:]
+    auth_path = default_auth_path()
+    if "--check" in args:
+        return 0 if is_valid(auth_path) else 1
+    status = refresh_if_stale(auth_path)
+    return 0 if status in {"fresh", "refreshed"} else 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

roboco/llm/providers/codex_cli_config.py

@@ -0,0 +1,277 @@
+"""Render a Codex CLI agent's runtime config + per-role flags at container start.
+
+The ``roboco-agent-codex`` image's entrypoint runs ``python -m
+roboco.llm.providers.codex_cli_config`` to turn the mounted Claude Code
+``mcp-config.json`` into ``~/.codex/config.toml`` (``[mcp_servers.<name>]``),
+write the execpolicy deny rules the git-push/package-manager parity needs, and
+compose the combined system+task prompt ``codex exec`` runs against. Keeping
+the translation in importable Python (not a shell heredoc) makes it
+unit-testable, mirroring :mod:`roboco.llm.providers.grok_cli_config`.
+
+Parity notes (where Codex's runtime model differs from grok's / Claude's):
+
+  * **tool removal** — the Codex CLI exposes no per-built-in-tool
+    allow/disallow flags (unlike grok's ``--disallowed-tools``). Tool scoping
+    is coarser: a ``--sandbox`` level per role (see :func:`sandbox_level_for_role`)
+    plus the execpolicy rules file below.
+  * **git / package-manager mutation** — codex's execpolicy is Starlark
+    ``prefix_rule(pattern=[...], decision=...)`` with only ``allow`` /
+    ``forbidden`` decisions available headless (a ``prompt`` decision would
+    block on an approval prompt that never arrives in a one-shot run). One
+    shared ``~/.codex/rules/default.rules`` file encodes the same git-mutation
+    / destructive / raw-package-manager denials grok expresses as
+    ``--deny`` rules — applied to every role (the sandbox level, not a
+    per-role rules variant, is what actually differs role to role).
+  * **system prompt** — the Codex CLI has no verified global instruction-file
+    mechanism (unlike grok's ``~/.grok/AGENTS.md``), so the composed role
+    blueprint is prepended to the task prompt itself and the RESULT is what
+    ``codex exec`` receives as its positional prompt argument (see
+    :func:`render_combined_prompt`). The prompt-injection guard in the
+    entrypoint still screens only the raw task prompt (the blueprint is
+    already trusted), matching grok's guard scope.
+  * **no hooks** — Codex's ``config.toml`` exposes no hook mechanism in the
+    verified build facts, so neither the bash-guard exfiltration hook nor the
+    Fable honesty-nudge hook is ported here (a V1 gap vs. the grok path).
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import tempfile
+from pathlib import Path
+from typing import Any
+
+import tomli_w
+
+from roboco.agents_config import get_agent_role
+
+# codex reads its global config from $HOME/.codex/config.toml.
+CODEX_CONFIG_PATH = Path.home() / ".codex" / "config.toml"
+# Execpolicy rules file (Starlark prefix_rule, allow/forbidden only).
+CODEX_RULES_DIR = Path.home() / ".codex" / "rules"
+CODEX_RULES_PATH = CODEX_RULES_DIR / "default.rules"
+# The composed role blueprint the orchestrator mounts into every agent container.
+SYSTEM_PROMPT_PATH = Path(
+    os.environ.get("ROBOCO_SYSTEM_PROMPT", "/app/system-prompt.md")
+)
+# The combined system+task prompt the entrypoint feeds to `codex exec` as its
+# positional argument (see the module docstring — no verified system-prompt
+# file mechanism exists for Codex, so the blueprint travels IN the prompt).
+CODEX_PROMPT_PATH = Path(
+    os.environ.get("ROBOCO_CODEX_PROMPT_FILE")
+    or Path(tempfile.gettempdir()) / "roboco-codex-prompt.txt"
+)
+# The entrypoint reads the computed per-role flags (one token per line) from
+# this file, mirroring grok_cli_config's GROK_ARGS_PATH handoff.
+CODEX_ARGS_PATH = Path(
+    os.environ.get("ROBOCO_CODEX_ARGS_FILE")
+    or Path(tempfile.gettempdir()) / "roboco-codex-args"
+)
+
+# The gateway pair MUST come up or the agent has no verb surface at all — set
+# required=true so a gateway-init failure fails the codex session fast instead
+# of silently running with no tools. Every other MCP server (git-readonly,
+# optimal, docs, playwright) is best-effort.
+_REQUIRED_MCP_SERVERS = frozenset({"roboco-flow", "roboco-do"})
+
+# Only `developer` gets a writable sandbox in Codex V1 — narrower than grok's
+# per-role `allows_write` (role_config says documenter also writes). Documenter
+# writes ride the roboco-docs MCP server (a network call, not a local sandboxed
+# file edit), so a read-only sandbox does not block its actual job; qa /
+# pr_reviewer / cell_pm / main_pm never write code either way. Loosen this set
+# if a role's real workflow needs local file writes under Codex.
+_WORKSPACE_WRITE_ROLES = frozenset({"developer"})
+
+_SANDBOX_WORKSPACE_WRITE = "workspace-write"
+_SANDBOX_READ_ONLY = "read-only"
+
+# Deny parity with grok's --deny rules (roboco/llm/providers/grok_cli_config's
+# _GIT_MUTATE_DENY / _DESTRUCTIVE_DENY / _RAW_PM_DENY), expressed as execpolicy
+# command prefixes instead of glob strings. Applied via ONE shared rules file
+# for every role (the sandbox level is what varies per role, not this list) —
+# skipped a per-role rules variant, add one if a role needs a narrower/broader
+# command surface than the rest.
+_GIT_MUTATE_PREFIXES: tuple[tuple[str, ...], ...] = (
+    ("git", "push"),
+    ("git", "fetch"),
+    ("git", "pull"),
+    ("git", "clone"),
+    ("git", "commit"),
+    ("git", "remote"),
+    ("git", "reset"),
+    ("git", "ls-remote"),
+    ("git", "checkout"),
+    ("git", "merge"),
+    ("git", "rebase"),
+    ("git", "cherry-pick"),
+    ("git", "revert"),
+    ("git", "update-ref"),
+    ("git", "tag", "-d"),
+    ("git", "reflog", "delete"),
+)
+_DESTRUCTIVE_PREFIXES: tuple[tuple[str, ...], ...] = (("rm", "-rf"),)
+_RAW_PM_PREFIXES: tuple[tuple[str, ...], ...] = (
+    ("uv", "run"),
+    ("uv", "sync"),
+    ("uv", "pip", "install"),
+    ("uv", "pip", "uninstall"),
+    ("uv", "lock"),
+    ("uv", "add"),
+    ("uv", "remove"),
+    ("pip", "install"),
+    ("pip3", "install"),
+    ("pip", "uninstall"),
+    ("conda", "install"),
+    ("conda", "create"),
+    ("conda", "run"),
+    ("poetry", "run"),
+    ("poetry", "install"),
+    ("poetry", "add"),
+)
+
+
+def render_config_toml(mcp_config: dict[str, Any]) -> str:
+    """Translate Claude Code ``mcpServers`` into codex's ``[mcp_servers]`` TOML.
+
+    ``{"command": "uv", "args": [...], "env": {...}}`` becomes a
+    ``[mcp_servers.<name>]`` table with the same fields, plus ``required =
+    true`` for the gateway pair (``roboco-flow`` / ``roboco-do``) so a
+    gateway-init failure fails the codex session fast. Returns an empty string
+    when there are no servers.
+    """
+    servers: dict[str, dict[str, Any]] = {}
+    for name, spec in (mcp_config.get("mcpServers") or {}).items():
+        block: dict[str, Any] = {
+            "command": str(spec.get("command", "")),
+            "args": [str(a) for a in (spec.get("args") or [])],
+        }
+        env = spec.get("env") or {}
+        if env:
+            block["env"] = {str(k): str(v) for k, v in env.items()}
+        if str(name) in _REQUIRED_MCP_SERVERS:
+            block["required"] = True
+        servers[str(name)] = block
+    return tomli_w.dumps({"mcp_servers": servers}) if servers else ""
+
+
+def sandbox_level_for_role(role: str) -> str:
+    """The ``--sandbox`` level for a role (see ``_WORKSPACE_WRITE_ROLES``)."""
+    return (
+        _SANDBOX_WORKSPACE_WRITE
+        if role in _WORKSPACE_WRITE_ROLES
+        else _SANDBOX_READ_ONLY
+    )
+
+
+def codex_cli_args_for_role(role: str) -> list[str]:
+    """The per-role ``codex exec`` flag tokens (excludes ``-m``/``--json``).
+
+    Role-invariant flags (``--json``, the model) are hardcoded in the
+    entrypoint shell script instead of here, since they never vary by role —
+    only the sandbox level does.
+    """
+    return ["--sandbox", sandbox_level_for_role(role), "--skip-git-repo-check"]
+
+
+def codex_cli_args(agent_id: str) -> list[str]:
+    """The per-role codex flags for an agent, resolving its role from the id."""
+    return codex_cli_args_for_role(get_agent_role(agent_id) or "")
+
+
+def _prefix_rule(prefix: tuple[str, ...], decision: str = "forbidden") -> str:
+    args = ", ".join(json.dumps(token) for token in prefix)
+    return f'prefix_rule(pattern = [{args}], decision = "{decision}")'
+
+
+def render_execpolicy_rules() -> str:
+    """The Starlark execpolicy rules text (git-mutation + destructive + raw-PM).
+
+    ``allow`` / ``forbidden`` decisions only — a ``prompt`` decision blocks on
+    an approval prompt that never arrives in a headless ``codex exec`` turn,
+    failing the turn instead of gracefully adapting.
+    """
+    lines = [
+        "# Generated by roboco.llm.providers.codex_cli_config — do not hand-edit.",
+        "# Git network/branch/history mutation: agents commit/push via the",
+        "# gateway verbs, never raw git.",
+    ]
+    lines += [_prefix_rule(p) for p in _GIT_MUTATE_PREFIXES]
+    lines.append("# Destructive shell.")
+    lines += [_prefix_rule(p) for p in _DESTRUCTIVE_PREFIXES]
+    lines.append("# Raw package-manager / lockfile commands — use `make` instead.")
+    lines += [_prefix_rule(p) for p in _RAW_PM_PREFIXES]
+    return "\n".join(lines) + "\n"
+
+
+def write_execpolicy_rules(*, dest: Path = CODEX_RULES_PATH) -> None:
+    """Write the shared execpolicy rules file (always; content is generated)."""
+    dest.parent.mkdir(parents=True, exist_ok=True)
+    dest.write_text(render_execpolicy_rules(), encoding="utf-8")
+
+
+def render_combined_prompt(system_prompt: str, task_prompt: str) -> str:
+    """Compose the blueprint + task prompt into one ``codex exec`` argument.
+
+    No verified Codex system-prompt-file mechanism exists (see module
+    docstring), so the trusted blueprint is prepended to the (guard-screened,
+    by the entrypoint) task prompt rather than mounted separately.
+    """
+    system_prompt = system_prompt.strip()
+    task_prompt = task_prompt.strip()
+    if not system_prompt:
+        return task_prompt
+    if not task_prompt:
+        return system_prompt
+    return f"{system_prompt}\n\n---\n\n{task_prompt}"
+
+
+def write_combined_prompt(
+    *,
+    task_prompt: str,
+    source: Path = SYSTEM_PROMPT_PATH,
+    dest: Path = CODEX_PROMPT_PATH,
+) -> bool:
+    """Write the combined prompt file; returns True iff a blueprint was found.
+
+    A missing/unreadable blueprint degrades to the task prompt alone rather
+    than failing the render.
+    """
+    try:
+        blueprint = source.read_text(encoding="utf-8")
+    except OSError:
+        blueprint = ""
+    dest.parent.mkdir(parents=True, exist_ok=True)
+    dest.write_text(render_combined_prompt(blueprint, task_prompt), encoding="utf-8")
+    return bool(blueprint)
+
+
+def _load_mcp_config(path: str) -> dict[str, Any]:
+    """Load the mounted mcp-config.json, tolerating a missing / invalid file."""
+    try:
+        with Path(path).open(encoding="utf-8") as fh:
+            loaded = json.load(fh)
+            return loaded if isinstance(loaded, dict) else {}
+    except (OSError, json.JSONDecodeError):
+        return {}
+
+
+def main() -> int:
+    """Entrypoint: write config.toml + execpolicy rules + prompt + per-role args."""
+    agent_id = os.environ.get("ROBOCO_AGENT_ID", "")
+    mcp_path = os.environ.get("ROBOCO_MCP_CONFIG", "/app/mcp-config.json")
+
+    CODEX_CONFIG_PATH.parent.mkdir(parents=True, exist_ok=True)
+    CODEX_CONFIG_PATH.write_text(
+        render_config_toml(_load_mcp_config(mcp_path)), encoding="utf-8"
+    )
+    write_execpolicy_rules()
+    write_combined_prompt(task_prompt=os.environ.get("ROBOCO_INITIAL_PROMPT", ""))
+    CODEX_ARGS_PATH.write_text(
+        "\n".join(codex_cli_args(agent_id)) + "\n", encoding="utf-8"
+    )
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

roboco/llm/providers/codex_cli_sniff.py

@@ -0,0 +1,124 @@
+"""Classify a Codex CLI run's terminal state from ONLY its machine-relevant
+output — never the full transcript.
+
+Codex has no exit-code taxonomy (every failure exits 1), so the entrypoint
+must sniff the run's output to tell an OpenAI rate-limit / auth failure apart
+from any other error. Sniffing the FULL captured JSONL stdout is unsafe: the
+model's own on-topic prose can false-positive by construction — this repo's
+own role prompts use the phrase "quota-limited", a commit hash or item content
+can contain the substring "429", ... A prior cut of this entrypoint grepped
+the whole transcript and would have false-parked the entire OPENAI provider on
+any of that ordinary, on-topic output.
+
+The fix is structural, not a pattern tweak: extract ONLY —
+  - the ``error.message`` field of any JSONL event carrying an ``error`` key
+    (``turn.failed`` is the documented shape; the check is structural, not
+    gated on ``type``, so any other error-bearing event works too), and
+  - the run's raw stderr,
+and sniff THAT text. The model's own echoed stdout content can never reach
+the classifier, so it can never trigger a false park by construction.
+
+Patterns (mirroring grok's own proven, word-boundaried set — see
+``docker/scripts/grok-cli-agent-entrypoint.sh``):
+  - rate-limit: ``\\b429\\b``, ``rate.?limit``, "too many requests", "quota",
+    "insufficient_quota".
+  - auth failure: exact phrases only — "refresh token has expired", "not
+    signed in". Deliberately NOT the bare word "login" (the panel itself has
+    a login page; any transcript mentioning it would false-park the whole
+    provider).
+
+The entrypoint calls this as ``python -m roboco.llm.providers.codex_cli_sniff
+<run_log> [err_log]``, printing ``rate_limit`` / ``auth`` / an empty line.
+"""
+
+from __future__ import annotations
+
+import contextlib
+import json
+import re
+import sys
+from pathlib import Path
+from typing import Any
+
+_RATE_LIMIT_PATTERN = re.compile(
+    r"(\b429\b|rate.?limit|too many requests|quota|insufficient_quota)",
+    re.IGNORECASE,
+)
+_AUTH_FAILURE_PATTERN = re.compile(
+    r"(refresh token has expired|not signed in)", re.IGNORECASE
+)
+
+
+def extract_error_text(run_log: Path) -> str:
+    """Pull ONLY the ``error.message`` text from JSONL events in *run_log*.
+
+    Scans every line for a dict carrying an ``error`` sub-object with a
+    ``message`` string (the ``turn.failed`` shape); every other event
+    (``turn.completed``, ``item.*``, plain assistant text, ...) is ignored
+    regardless of its content — the model's own prose never reaches this
+    text. Best-effort: a missing/unreadable file returns "".
+    """
+    messages: list[str] = []
+    try:
+        with run_log.open(encoding="utf-8") as fh:
+            for raw in fh:
+                text = raw.strip()
+                if not text:
+                    continue
+                try:
+                    event: Any = json.loads(text)
+                except json.JSONDecodeError:
+                    continue
+                if not isinstance(event, dict):
+                    continue
+                error = event.get("error")
+                if isinstance(error, dict):
+                    message = error.get("message")
+                    if isinstance(message, str) and message:
+                        messages.append(message)
+    except OSError:
+        return ""
+    return "\n".join(messages)
+
+
+def is_rate_limited(text: str) -> bool:
+    """True if the (already-extracted, machine-only) *text* names a 429/quota error."""
+    return bool(_RATE_LIMIT_PATTERN.search(text))
+
+
+def is_auth_failure(text: str) -> bool:
+    """True if the (already-extracted, machine-only) *text* names an auth failure."""
+    return bool(_AUTH_FAILURE_PATTERN.search(text))
+
+
+def classify(run_log: Path, err_log: Path | None = None) -> str:
+    """Return ``"rate_limit"`` / ``"auth"`` / ``""`` for a captured Codex run.
+
+    Sniffs ONLY the extracted JSONL ``error.message`` text plus the raw
+    stderr — never the full stdout transcript (see module docstring).
+    """
+    text = extract_error_text(run_log)
+    if err_log is not None:
+        with contextlib.suppress(OSError):
+            text = f"{text}\n{err_log.read_text(encoding='utf-8')}"
+    if is_rate_limited(text):
+        return "rate_limit"
+    if is_auth_failure(text):
+        return "auth"
+    return ""
+
+
+def main(argv: list[str] | None = None) -> int:
+    """CLI: prints the classification for ``<run_log> [err_log]``."""
+    args = argv if argv is not None else sys.argv[1:]
+    if not args:
+        print("")
+        return 0
+    run_log = Path(args[0])
+    err_log = Path(args[1]) if len(args) > 1 else None
+    print(classify(run_log, err_log))
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

roboco/llm/providers/codex_cli_usage.py

@@ -0,0 +1,184 @@
+"""Capture token usage from a Codex CLI run for the usage / cost dashboard.
+
+``codex exec --json`` streams typed JSONL to stdout; each completed turn
+emits one ``turn.completed`` event carrying a real ``usage`` object —
+``{input_tokens, cached_input_tokens, cache_write_input_tokens, output_tokens,
+reasoning_output_tokens}``. Unlike grok (a single cumulative total with no
+split, folded entirely into the output rate), Codex reports a genuine
+input/output/cache split, so this reader prices it properly through
+:func:`roboco.billing.pricing.calculate_cost`'s four-bucket formula instead of
+grok's output-only fallback.
+
+``cached_input_tokens`` is a SUBSET of ``input_tokens`` (OpenAI's usage
+convention: cached tokens are part of the prompt, not additional to it), so
+the "fresh" input handed to ``calculate_cost`` is ``input_tokens -
+cached_input_tokens`` — treating the full ``input_tokens`` as "fresh" would
+double-charge the cached portion at both the full and the cached rate.
+``reasoning_output_tokens`` is folded into output (reasoning is billed at the
+output rate, the same convention grok's usage reader documents for its own
+reasoning tokens).
+
+Multiple ``turn.completed`` events can appear in one run's JSONL (the model
+can take more than one turn to finish); this reader sums usage across all of
+them, per the build directive to prefer the captured ``--json`` stdout over
+the on-disk ``~/.codex/sessions`` rollout files.
+
+The agent entrypoint runs ``python -m roboco.llm.providers.codex_cli_usage``
+after the run to write ``usage.json`` (same shape grok_cli_usage produces plus
+the real input/output split) into a per-agent dir the orchestrator reads back
+at finalize.
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import os
+import tempfile
+from pathlib import Path
+from typing import Any
+
+from roboco.billing.pricing import calculate_cost
+
+logger = logging.getLogger(__name__)
+
+# Where the entrypoint writes the captured usage for the orchestrator to read.
+USAGE_OUT_PATH = Path(
+    os.environ.get("ROBOCO_CODEX_USAGE_FILE")
+    or Path(tempfile.gettempdir()) / "roboco-codex-usage.json"
+)
+
+_TURN_COMPLETED = "turn.completed"
+_USAGE_FIELDS = (
+    "input_tokens",
+    "cached_input_tokens",
+    "cache_write_input_tokens",
+    "output_tokens",
+    "reasoning_output_tokens",
+)
+
+
+def _as_int(value: object) -> int:
+    return int(value) if isinstance(value, (int, float)) else 0
+
+
+def _usage_from_event(event: dict[str, Any]) -> dict[str, int] | None:
+    """Pull the raw usage fields from one ``turn.completed`` JSONL event.
+
+    Returns ``None`` for any other event type (``thread.started``,
+    ``turn.started``, ``turn.failed``, ``item.*``, ...).
+    """
+    event_type = event.get("type")
+    if event_type != _TURN_COMPLETED:
+        return None
+    usage = event.get("usage")
+    if not isinstance(usage, dict):
+        return None
+    return {field: _as_int(usage.get(field, 0)) for field in _USAGE_FIELDS}
+
+
+def aggregate_usage_from_jsonl(run_log: Path) -> dict[str, int]:
+    """Sum usage across every ``turn.completed`` event in a captured JSONL log.
+
+    Returns the summed raw fields plus ``turns`` (the ``turn.completed``
+    count). Best-effort: a missing/unreadable/empty file returns all zeros —
+    usage capture never fails the run.
+    """
+    totals = dict.fromkeys(_USAGE_FIELDS, 0)
+    turns = 0
+    try:
+        with run_log.open(encoding="utf-8") as fh:
+            for raw in fh:
+                text = raw.strip()
+                if not text:
+                    continue
+                try:
+                    event = json.loads(text)
+                except json.JSONDecodeError:
+                    continue
+                if not isinstance(event, dict):
+                    continue
+                usage = _usage_from_event(event)
+                if usage is None:
+                    continue
+                turns += 1
+                for field in _USAGE_FIELDS:
+                    totals[field] += usage[field]
+    except OSError:
+        pass
+    totals["turns"] = turns
+    return totals
+
+
+def usage_and_cost(model: str, agg: dict[str, int]) -> tuple[int, int, int, int, float]:
+    """Return ``(input, output, cache_read, cache_write, cost_usd)``.
+
+    ``cached_input_tokens`` is a subset of ``input_tokens`` (not additional),
+    so the "fresh" input is the difference; reasoning tokens fold into output.
+    """
+    cached = agg.get("cached_input_tokens", 0)
+    fresh_input = max(0, agg.get("input_tokens", 0) - cached)
+    output = agg.get("output_tokens", 0) + agg.get("reasoning_output_tokens", 0)
+    cache_write = agg.get("cache_write_input_tokens", 0)
+    cost = calculate_cost(
+        model,
+        tokens_input=fresh_input,
+        tokens_output=output,
+        tokens_cache_read=cached,
+        tokens_cache_write=cache_write,
+    )
+    return fresh_input, output, cached, cache_write, cost
+
+
+def capture_run_usage(
+    *, run_log: Path, model: str, out_path: Path
+) -> tuple[int, int, int, int]:
+    """Write ``usage.json`` for one codex run; return the token 4-tuple.
+
+    Best-effort: never raises (returns all zeros and writes nothing on any
+    IO/lookup failure).
+    """
+    try:
+        agg = aggregate_usage_from_jsonl(run_log)
+        tin, tout, cr, cw, cost = usage_and_cost(model, agg)
+        out_path.parent.mkdir(parents=True, exist_ok=True)
+        out_path.write_text(
+            json.dumps(
+                {
+                    "model": model,
+                    "tokens_input": tin,
+                    "tokens_output": tout,
+                    "tokens_cache_read": cr,
+                    "tokens_cache_write": cw,
+                    "cost_usd": cost,
+                    "turns": agg.get("turns", 0),
+                }
+            ),
+            encoding="utf-8",
+        )
+        return tin, tout, cr, cw
+    except OSError:
+        return 0, 0, 0, 0
+
+
+def main() -> int:
+    """Entrypoint: write ``usage.json`` (tokens split + cost) for the run."""
+    model = os.environ.get("ROBOCO_AGENT_MODEL", "gpt-5.3-codex")
+    run_log = os.environ.get("ROBOCO_CODEX_RUN_LOG", "")
+    if not run_log:
+        logger.warning("ROBOCO_CODEX_RUN_LOG not set; usage will read 0")
+        return 0
+    tin, tout, _cr, _cw = capture_run_usage(
+        run_log=Path(run_log), model=model, out_path=USAGE_OUT_PATH
+    )
+    if not tin and not tout:
+        logger.warning(
+            "codex agent finalized with no readable usage "
+            "(0 tokens / $0) — check the run log mount: run_log=%s",
+            run_log,
+        )
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

roboco/models/base.py

@@ -191,7 +191,10 @@ class ModelProvider(StrEnum):
     Messages API, so GROK agents run through a dedicated OpenAI-protocol
     provider (roboco.llm.providers.grok), not ANTHROPIC_BASE_URL injection.
     The xAI key is set via PUT /api/providers/grok/key.
-    `OPENAI` is reserved for future use.
+    `OPENAI` routes through the official Codex CLI on a ChatGPT subscription
+    (roboco.llm.providers.codex.CodexCliProvider), mirroring GROK's shape: a
+    mounted subscription credential (`~/.codex`), not a metered API key.
+    One-shot delivery roles only — no interactive intake/secretary support.
     """
 
     ANTHROPIC = "anthropic"

roboco/models/llm_catalog.py

@@ -80,6 +80,10 @@ MODEL_CATALOG: tuple[CatalogEntry, ...] = (
     # Routes to the GROK provider → GrokCliProvider spawn (api.x.ai/v1). The xAI
     # key is set via PUT /api/providers/grok/key.
     CatalogEntry("grok-build-0.1", ModelProvider.GROK, "Grok Build 0.1"),
+    # --- Codex (OpenAI, official CLI) ---
+    # Routes to the OPENAI provider → CodexCliProvider spawn. Subscription auth
+    # (~/.codex, from `codex login`), no metered API key — parity with Grok.
+    CatalogEntry("gpt-5.3-codex", ModelProvider.OPENAI, "GPT-5.3 Codex"),
 )
 
 

roboco/runtime/orchestrator.py

@@ -17,6 +17,7 @@ import contextlib
 import hashlib
 import json
 import os
+import re
 import shutil
 import tempfile
 import time
@@ -362,6 +363,9 @@ DATA_HOST_PATH = os.environ.get("ROBOCO_HOST_DATA_DIR", "")
 # (the grok analogue of reading the Claude transcript from the mounted ~/.claude).
 # Override for local runs.
 GROK_USAGE_DATA_DIR = os.environ.get("ROBOCO_GROK_USAGE_DIR", "/data/grok-usage")
+# Same shape for CODEX agents (roboco.llm.providers.codex_cli_usage writes
+# usage.json here; the finalizer reads it back — see _codex_usage_json).
+CODEX_USAGE_DATA_DIR = os.environ.get("ROBOCO_CODEX_USAGE_DIR", "/data/codex-usage")
 
 # Interactive Grok images (grok-CLI conversation drivers) — selected for the
 # intake / secretary roles when their route resolves to GROK, instead of the
@@ -401,6 +405,21 @@ _GROK_REPARK_EPISODE_GAP_S = 1500.0  # 25min — > the capped ~16min cycle
 _GROK_AUTH_EXIT_CODE = 78
 _GROK_AUTH_RETRY_AFTER_S = 60.0
 
+# A one-shot Codex container exits with these SAME codes for the SAME reasons
+# (its entrypoint mirrors grok's exit-code convention — see
+# docker/scripts/codex-cli-agent-entrypoint.sh): 75 (EX_TEMPFAIL) on a
+# detected OpenAI rate-limit / quota error, 78 (EX_CONFIG) when the
+# codex_auth --check backstop finds the mounted ChatGPT-subscription token
+# missing/expired. Numeric reuse is fine — the checks are scoped by
+# provider_type (ModelProvider.OPENAI vs .GROK), never by exit code alone.
+# Unlike grok's rate-limit park, Codex has no observed re-park storm to back
+# off against yet, so this parks at a flat retry_after (no exponential
+# backoff bookkeeping) — add if operators see a repark cycle in practice.
+_CODEX_RATE_LIMIT_EXIT_CODE = 75
+_CODEX_RATE_LIMIT_RETRY_AFTER_S = 60.0
+_CODEX_AUTH_EXIT_CODE = 78
+_CODEX_AUTH_RETRY_AFTER_S = 60.0
+
 
 # =============================================================================
 # ORCHESTRATOR
@@ -1524,6 +1543,47 @@ class AgentOrchestrator:
                 error=str(exc),
             )
 
+    @staticmethod
+    def _codex_usage_root() -> Path:
+        """The base dir all per-agent codex usage dirs live under (no agent id).
+
+        Same compose-vs-local branch as :meth:`_grok_usage_root`.
+        """
+        if PROJECT_HOST_PATH:
+            return Path(CODEX_USAGE_DATA_DIR)
+        return Path(tempfile.gettempdir()) / "roboco-codex-usage"
+
+    @staticmethod
+    def _codex_usage_dir(agent_id: str) -> Path:
+        """Per-agent codex usage dir under :meth:`_codex_usage_root`.
+
+        Single source of truth for BOTH the pre-create/mount side
+        (``_ensure_codex_usage_dir``) and the finalize read side
+        (``_codex_usage_json``), mirroring ``_grok_usage_dir``.
+        """
+        return AgentOrchestrator._codex_usage_root() / (
+            AgentOrchestrator._safe_agent_path_segment(agent_id)
+        )
+
+    def _ensure_codex_usage_dir(self, agent_id: str) -> None:
+        """Pre-create the agent's codex usage dir (world-writable) before the mount.
+
+        Same EACCES concern as ``_ensure_grok_usage_dir``: a missing bind
+        source is auto-created ``root:root`` on Linux, which the non-root
+        ``agent`` user can't write into.
+        """
+        target = self._codex_usage_dir(agent_id)
+        try:
+            target.mkdir(parents=True, exist_ok=True)
+            target.chmod(0o777)
+        except OSError as exc:
+            logger.warning(
+                "could not pre-create codex usage dir; codex agent may EACCES",
+                agent_id=agent_id,
+                path=str(target),
+                error=str(exc),
+            )
+
     async def _ensure_image_present(
         self, bare_image: str, dockerfile_path: str, build_context: str
     ) -> None:
@@ -2834,6 +2894,8 @@ class AgentOrchestrator:
                 # captured tokens back at finalize via the shared data volume
                 # (see GROK_USAGE_DATA_DIR).
                 "grok_usage": f"{DATA_HOST_PATH}/grok-usage/{config.agent_id}",
+                # Per-agent codex usage dir (OPENAI only); same shape.
+                "codex_usage": f"{DATA_HOST_PATH}/codex-usage/{config.agent_id}",
                 "prompt": (
                     f"{DATA_HOST_PATH}/prompts-generated/{config.agent_id}-prompt.md"
                 ),
@@ -2856,6 +2918,9 @@ class AgentOrchestrator:
             "grok_usage": str(
                 Path(tempfile.gettempdir()) / "roboco-grok-usage" / config.agent_id
             ),
+            "codex_usage": str(
+                Path(tempfile.gettempdir()) / "roboco-codex-usage" / config.agent_id
+            ),
             "prompt": str(
                 Path(tempfile.gettempdir())
                 / "roboco-prompts"
@@ -3225,20 +3290,31 @@ class AgentOrchestrator:
         """Build (once) the registry of dedicated provider backends.
 
         Only providers that need a runtime other than the built-in Claude Code
-        container are registered. Today that is GROK (xAI, OpenAI protocol).
+        container are registered. Today that is GROK (xAI) and OPENAI (Codex
+        CLI) — both OpenAI-protocol-shaped subscription CLIs.
         """
         if self._provider_registry is None:
-            from roboco.llm.providers import GrokCliProvider, ProviderRegistry
+            from roboco.llm.providers import (
+                CodexCliProvider,
+                GrokCliProvider,
+                ProviderRegistry,
+            )
             from roboco.models.base import ModelProvider
 
             registry = ProviderRegistry()
-            # Qualify the grok image with the registry namespace + tag so it
+            # Qualify each image with the registry namespace + tag so it
             # resolves in both local-build and registry deploys (parity with
             # get_agent_image for the Claude path).
             registry.register(
                 ModelProvider.GROK,
                 GrokCliProvider(self, image=_qualify_agent_image("roboco-agent-grok")),
             )
+            registry.register(
+                ModelProvider.OPENAI,
+                CodexCliProvider(
+                    self, image=_qualify_agent_image("roboco-agent-codex")
+                ),
+            )
             self._provider_registry = registry
         return self._provider_registry
 
@@ -6114,13 +6190,36 @@ class AgentOrchestrator:
         branched dir the writers mount (``_grok_usage_dir``). Returns ``None`` when
         absent / unreadable.
         """
-        # os.path.basename keeps only the final path component of the agent id
-        # before the path is built — the path-injection sanitizer CodeQL models,
-        # applied here in the read's own scope. _grok_usage_dir's guard rejects
-        # '.' / '..' / separators / NUL upstream (a bad id raises -> None here).
+        return self._read_usage_json_contained(self._grok_usage_root(), agent_id)
+
+    @staticmethod
+    def _read_usage_json_contained(base: Path, agent_id: str) -> dict[str, Any] | None:
+        """Read ``<base>/<agent_id>/usage.json`` behind a containment barrier.
+
+        Agent ids are orchestrator-assigned slugs/uuids and the dir builders
+        already validate them (``_safe_agent_path_segment``), but the read
+        applies the resolve-and-contain check anyway: the id is reduced to its
+        final path component, the full path resolved, and any result outside
+        the resolved usage root refused — a hostile id can never escape the
+        root regardless of upstream drift. Returns ``None`` when refused,
+        absent, or unreadable.
+        """
+        # Barrier (CWE-022): the id must be a single allowlisted token — the
+        # orchestrator only ever assigns slug/uuid ids ([A-Za-z0-9._-]), none
+        # of which can contain a path separator or ``..`` traversal (the
+        # required alphanumeric first char already rejects ``.``/``..``). This
+        # standalone regexp fullmatch is the primary sanitizer; the
+        # realpath+startswith containment below is defense-in-depth.
+        segment = os.path.basename(agent_id)
+        if not re.fullmatch(r"[A-Za-z0-9][A-Za-z0-9._-]*", segment):
+            return None
         try:
-            usage_json = self._grok_usage_dir(os.path.basename(agent_id)) / "usage.json"
-            data = json.loads(usage_json.read_text(encoding="utf-8"))
+            root = os.path.realpath(base)
+            candidate = os.path.realpath(base / segment / "usage.json")
+            if candidate != root and not candidate.startswith(root + os.sep):
+                return None
+            with Path(candidate).open(encoding="utf-8") as handle:
+                data = json.loads(handle.read())
         except (OSError, ValueError, json.JSONDecodeError):
             return None
         return data if isinstance(data, dict) else None
@@ -6159,6 +6258,58 @@ class AgentOrchestrator:
         except (TypeError, ValueError):
             return 0.0
 
+    def _codex_usage_json(self, agent_id: str) -> dict[str, Any] | None:
+        """Read an OPENAI agent's ``usage.json`` (mirrors ``_grok_usage_json``).
+
+        Written by the codex-cli entrypoint (one-shot, post-run) to the
+        per-agent dir under ``_codex_usage_dir``. Returns ``None`` when
+        absent / unreadable.
+        """
+        return self._read_usage_json_contained(self._codex_usage_root(), agent_id)
+
+    def _codex_usage_tokens(self, agent_id: str) -> tuple[int, int, int, int]:
+        """An OPENAI agent's token usage from its ``usage.json``.
+
+        Unlike grok's single cumulative total, codex reports a real
+        input/output/cache split (see ``codex_cli_usage``), so this returns
+        the genuine 4-tuple instead of folding everything into output. A
+        WARNING logs on a missing/zero read (a silent mount/uid failure is
+        otherwise indistinguishable from a genuine zero-cost run).
+        """
+        data = self._codex_usage_json(agent_id)
+        tokens = (0, 0, 0, 0)
+        if data:
+            try:
+                tokens = (
+                    int(data.get("tokens_input", 0)),
+                    int(data.get("tokens_output", 0)),
+                    int(data.get("tokens_cache_read", 0)),
+                    int(data.get("tokens_cache_write", 0)),
+                )
+            except (TypeError, ValueError):
+                tokens = (0, 0, 0, 0)
+        if not tokens[0] and not tokens[1]:
+            logger.warning(
+                "OPENAI (codex) agent finalized with no readable usage "
+                "(0 tokens / $0) — check the data dir mount",
+                agent_id=agent_id,
+            )
+        return tokens
+
+    def _codex_usage_turns(self, agent_id: str) -> int:
+        """An OPENAI agent's turn count from its ``usage.json`` (0 if none).
+
+        Codex's JSONL carries a real ``turn.completed`` count (unlike grok,
+        which has no turn signal at all) — see ``codex_cli_usage``.
+        """
+        data = self._codex_usage_json(agent_id)
+        if not data:
+            return 0
+        try:
+            return int(data.get("turns", 0))
+        except (TypeError, ValueError):
+            return 0
+
     async def _enforce_grok_cost_budget(self) -> None:
         """Kill a live GROK container whose captured cost exceeds the cap.
 
@@ -6226,17 +6377,21 @@ class AgentOrchestrator:
     ) -> tuple[int, int, int, int]:
         """Resolve final token counts for a stopping agent.
 
-        For a GROK agent, reads the captured ``usage.json`` (no SDK server /
-        Claude transcript exists). Otherwise tries the live SDK ``/usage/status``
-        first; if that misses — the SDK's in-memory counts race container teardown
-        for short-lived agents — it falls back to the agent's Claude Code
-        transcript, which is durable and mounted into this container. Returns
+        For a GROK or OPENAI (codex) agent, reads the captured ``usage.json``
+        (no SDK server / Claude transcript exists for either). Otherwise tries
+        the live SDK ``/usage/status`` first; if that misses — the SDK's
+        in-memory counts race container teardown for short-lived agents — it
+        falls back to the agent's Claude Code transcript, which is durable and
+        mounted into this container. Returns
         ``(input, output, cache_read, cache_write)``.
         """
         from roboco.models.base import ModelProvider
 
-        if self.get_provider_for_agent(agent_id) == ModelProvider.GROK.value:
+        provider = self.get_provider_for_agent(agent_id)
+        if provider == ModelProvider.GROK.value:
             return self._grok_usage_tokens(agent_id)
+        if provider == ModelProvider.OPENAI.value:
+            return self._codex_usage_tokens(agent_id)
 
         tokens = (0, 0, 0, 0)
         sdk_url = f"http://roboco-agent-{agent_id}:{SDK_PORT}/usage/status"
@@ -6276,12 +6431,17 @@ class AgentOrchestrator:
         assistant-message count) for short-lived agents whose SDK counts race
         teardown; ``tool_calls`` has no transcript equivalent and stays 0 ("n/a")
         when the SDK misses. Grok agents have neither — returns ``(0, 0)``.
-        Best-effort: any failure degrades to zeros, never blocks finalize.
+        Codex agents have a real ``turn.completed`` count (from its usage.json)
+        but no tool-call signal — returns ``(turns, 0)``. Best-effort: any
+        failure degrades to zeros, never blocks finalize.
         """
         from roboco.models.base import ModelProvider
 
-        if self.get_provider_for_agent(agent_id) == ModelProvider.GROK.value:
+        provider = self.get_provider_for_agent(agent_id)
+        if provider == ModelProvider.GROK.value:
             return (0, 0)
+        if provider == ModelProvider.OPENAI.value:
+            return (self._codex_usage_turns(agent_id), 0)
 
         turns = tool_calls = 0
         sdk_url = f"http://roboco-agent-{agent_id}:{SDK_PORT}/usage/status"
@@ -6470,19 +6630,23 @@ class AgentOrchestrator:
         Tries the agent SDK's ``/usage/status`` first; on a zero/miss falls
         back to the durable transcript (the SDK can report zero mid-run, the
         same race the finalize path handles). Returns ``None`` when neither
-        source has any usage yet. GROK has no SDK server or Claude transcript,
-        so it routes to its ``usage.json`` — the same early return the finalize
-        path uses, so live USAGE_SNAPSHOT reflects grok agents mid-run too.
+        source has any usage yet. GROK / OPENAI (codex) have no SDK server or
+        Claude transcript, so each routes to its own ``usage.json`` — the same
+        early return the finalize path uses, so live USAGE_SNAPSHOT reflects
+        grok/codex agents mid-run too.
         """
         instance = self._instances.get(agent_id)
-        is_grok = (
-            instance is not None
-            and instance.config is not None
-            and instance.config.provider_type == ModelProvider.GROK.value
+        provider = (
+            instance.config.provider_type
+            if instance is not None and instance.config is not None
+            else None
         )
-        if is_grok:
+        if provider == ModelProvider.GROK.value:
             grok_tokens = self._grok_usage_tokens(agent_id)
             return grok_tokens if any(grok_tokens) else None
+        if provider == ModelProvider.OPENAI.value:
+            codex_tokens = self._codex_usage_tokens(agent_id)
+            return codex_tokens if any(codex_tokens) else None
         tokens = await self._fetch_agent_tokens(client, agent_id)
         if tokens is not None:
             return tokens
@@ -8091,6 +8255,16 @@ Start by:
         if self._is_grok_auth_exit(instance, exit_code):
             await self._park_grok_auth_unavailable(agent_id, instance)
             return
+        # Codex 429/auth parking: same exit-code convention as grok (see
+        # _CODEX_RATE_LIMIT_EXIT_CODE / _CODEX_AUTH_EXIT_CODE), scoped to
+        # ModelProvider.OPENAI so a numeric-code collision with another
+        # provider's crash can never mis-park.
+        if self._is_codex_rate_limit_exit(instance, exit_code):
+            await self._park_codex_rate_limited(agent_id, instance)
+            return
+        if self._is_codex_auth_exit(instance, exit_code):
+            await self._park_codex_auth_unavailable(agent_id, instance)
+            return
         graceful = exit_code == 0
         # Park the provider on a session/usage limit or a server overload detected
         # in the dead container's output instead of crash-retrying into it. The
@@ -9489,6 +9663,33 @@ Start by:
             and instance.config.provider_type == ModelProvider.GROK.value
         )
 
+    @staticmethod
+    def _is_codex_rate_limit_exit(instance: Any, exit_code: int | None) -> bool:
+        """True for a one-shot codex container that exited 75 (OpenAI 429)."""
+        from roboco.models.base import ModelProvider
+
+        return (
+            exit_code == _CODEX_RATE_LIMIT_EXIT_CODE
+            and instance.config is not None
+            and instance.config.provider_type == ModelProvider.OPENAI.value
+        )
+
+    @staticmethod
+    def _is_codex_auth_exit(instance: Any, exit_code: int | None) -> bool:
+        """True for a one-shot codex container that exited 78 (auth missing/expired).
+
+        The entrypoint runs ``codex_auth --check`` as a backstop and exits 78
+        when the ChatGPT-subscription token is missing or expired — see
+        ``_CODEX_AUTH_EXIT_CODE``.
+        """
+        from roboco.models.base import ModelProvider
+
+        return (
+            exit_code == _CODEX_AUTH_EXIT_CODE
+            and instance.config is not None
+            and instance.config.provider_type == ModelProvider.OPENAI.value
+        )
+
     @staticmethod
     async def _tail_container_logs(container_name: str, lines: int = 80) -> str:
         """Return the last ``lines`` of a container's combined output, '' on error.
@@ -9718,6 +9919,41 @@ Start by:
             kind="auth_missing",
         )
 
+    async def _park_codex_rate_limited(self, agent_id: str, instance: Any) -> None:
+        """Park a codex agent whose run hit an OpenAI 429 (entrypoint exit 75).
+
+        Flat retry_after (no exponential re-park backoff like grok's — see
+        ``_CODEX_RATE_LIMIT_EXIT_CODE``): add the same backoff bookkeeping if
+        Codex is observed re-parking in a tight cycle in practice.
+        """
+        from roboco.models.base import ModelProvider
+
+        await self._park_provider_unavailable(
+            agent_id,
+            instance,
+            provider=ModelProvider.OPENAI.value,
+            retry_after=_CODEX_RATE_LIMIT_RETRY_AFTER_S,
+            kind="rate_limited",
+        )
+
+    async def _park_codex_auth_unavailable(self, agent_id: str, instance: Any) -> None:
+        """Park a codex agent whose token was missing/expired (entrypoint exit 78).
+
+        Same park-and-probe shape as the grok auth path: the agent cannot
+        start without a valid token, so crash-retrying burns tokens for zero
+        progress. The dispatcher loop's ``_refresh_codex_auth`` revives the
+        task once ``codex_auth.refresh_if_stale`` mints a fresh token.
+        """
+        from roboco.models.base import ModelProvider
+
+        await self._park_provider_unavailable(
+            agent_id,
+            instance,
+            provider=ModelProvider.OPENAI.value,
+            retry_after=_CODEX_AUTH_RETRY_AFTER_S,
+            kind="auth_missing",
+        )
+
     @staticmethod
     def _too_early_to_probe(state: dict[str, Any]) -> bool:
         """True while the estimated lift time (activated_at + retry_after) is future.
@@ -10894,6 +11130,7 @@ Start now: evidence(task_id="{task_id}")
                     )
                 self._dispatch_wake.clear()
                 await self._refresh_grok_auth()
+                await self._refresh_codex_auth()
                 await self._dispatch_all_work()
                 await self._emit_dispatcher_heartbeat()
             except asyncio.CancelledError:
@@ -10932,6 +11169,34 @@ Start now: evidence(task_id="{task_id}")
         except Exception as exc:
             logger.error("grok auth refresh hook error", error=str(exc))
 
+    async def _refresh_codex_auth(self) -> None:
+        """Keep the host Codex CLI credential live (parity with ``_refresh_grok_auth``).
+
+        Same rationale as the grok refresh: the per-agent mount is read-only,
+        so the orchestrator refreshes the host ``auth.json`` itself before the
+        access JWT expires. Best-effort, throttled, and serial (run once per
+        dispatch tick). Never breaks the loop.
+        """
+        now = datetime.now(UTC)
+        next_check = getattr(self, "_codex_auth_next_check", None)
+        if next_check is not None and now < next_check:
+            return
+        self._codex_auth_next_check = now + timedelta(seconds=60)
+        try:
+            from roboco.llm.providers import codex_auth
+            from roboco.llm.providers.codex import CODEX_AUTH_HOST_PATH
+
+            auth_path = Path(CODEX_AUTH_HOST_PATH) / "auth.json"
+            status = await asyncio.to_thread(codex_auth.refresh_if_stale, auth_path)
+            if status == "refreshed":
+                logger.info("codex auth token refreshed")
+            elif status == "failed":
+                logger.warning(
+                    "codex auth refresh failed; agents may hit an expired token"
+                )
+        except Exception as exc:
+            logger.error("codex auth refresh hook error", error=str(exc))
+
     async def _reconcile_orphan_claims_on_startup(self) -> None:
         """Roll back tasks left in CLAIMED/IN_PROGRESS without a branch.
 

roboco/services/llm.py

@@ -379,7 +379,7 @@ class ModelRoutingService(BaseService):
 
     async def derive_mode(
         self,
-    ) -> Literal["anthropic", "grok", "ollama", "mix", "self_hosted"]:
+    ) -> Literal["anthropic", "grok", "codex", "ollama", "mix", "self_hosted"]:
         """Return the current "mode" label for the Settings UI.
 
         Decision tree matches what `apply_mode` writes:
@@ -387,6 +387,12 @@ class ModelRoutingService(BaseService):
           - only a global row, Ollama Cloud → "ollama"
           - only a global row, LOCAL        → "self_hosted"
           - anything else                   → "mix"
+
+        "codex" (OPENAI) is READ-only here — there is no `apply_mode="codex"`
+        write path (mix mode's per-agent picker is the only way to route to
+        it), so this branch exists purely so a pure-OPENAI global assignment
+        (however it got there) reports its real provider instead of the
+        catch-all "mix".
         """
         assignments = await self.list_assignments()
         if not assignments:
@@ -397,6 +403,8 @@ class ModelRoutingService(BaseService):
         if only_global:
             if assignments[0].provider.type == ModelProvider.GROK:
                 return "grok"
+            if assignments[0].provider.type == ModelProvider.OPENAI:
+                return "codex"
             if assignments[0].provider.type == ModelProvider.OLLAMA_CLOUD:
                 return "ollama"
             if assignments[0].provider.type == ModelProvider.LOCAL:

tests/integration/test_llm_routing.py

@@ -52,7 +52,16 @@ async def llm_setup(
         enabled=True,
         base_url="https://ollama.example.com",
     )
-    db_session.add_all([anthropic, grok, ollama])
+    # Mirrors migration 083_seed_openai_provider's contract: enabled=True at
+    # seed time (no apply_mode="codex" write path exists to flip it later —
+    # see that migration's docstring).
+    openai = ProviderConfigTable(
+        name="openai-test",
+        type=ModelProvider.OPENAI,
+        enabled=True,
+        base_url="https://api.openai.com/v1",
+    )
+    db_session.add_all([anthropic, grok, ollama, openai])
     await db_session.flush()
     yield {"svc": ModelRoutingService(db_session)}
 
@@ -196,6 +205,18 @@ async def test_derive_mode_grok_when_only_grok_global(llm_setup: dict) -> None:
     assert await svc.derive_mode() == "grok"
 
 
+@pytest.mark.asyncio
+async def test_derive_mode_codex_when_only_openai_global(llm_setup: dict) -> None:
+    """A pure-OPENAI global assignment reports "codex", not the catch-all
+    "mix" — the read-only branch derive_mode gained alongside the seed fix."""
+    svc = llm_setup["svc"]
+    codex_model = _first_model_for_type(ModelProvider.OPENAI)
+    await svc.upsert_assignment(
+        scope=AssignmentScope.GLOBAL, scope_value=None, model_name=codex_model
+    )
+    assert await svc.derive_mode() == "codex"
+
+
 @pytest.mark.asyncio
 async def test_derive_mode_mix_with_per_agent(llm_setup: dict) -> None:
     svc = llm_setup["svc"]
@@ -393,6 +414,32 @@ async def test_resolve_for_agent_uses_global_assignment(
     assert route.model_name == model
 
 
+@pytest.mark.asyncio
+async def test_upsert_and_resolve_openai_assignment_roundtrip(
+    llm_setup: dict,
+) -> None:
+    """gpt-5.3-codex through upsert_assignment -> resolve_for_agent, against
+    the seeded OPENAI row (migration 083). Before that seed existed,
+    upsert_assignment's `_get_seeded_provider(ModelProvider.OPENAI)` lookup
+    raised NotFoundError the moment anyone tried this — this is the round
+    trip that would have caught it."""
+    svc = llm_setup["svc"]
+    codex_model = _first_model_for_type(ModelProvider.OPENAI)
+    row = await svc.upsert_assignment(
+        scope=AssignmentScope.AGENT_SLUG,
+        scope_value="be-dev-1",
+        model_name=codex_model,
+    )
+    assert row.model_name == codex_model
+
+    route = await svc.resolve_for_agent("be-dev-1")
+    assert route.provider_type == ModelProvider.OPENAI
+    assert route.model_name == codex_model
+    # The seeded row carries no stored token — Codex authenticates via the
+    # mounted ~/.codex subscription dir, not a decrypted provider token.
+    assert route.auth_token is None
+
+
 @pytest.mark.asyncio
 async def test_resolve_for_agent_uses_provider_token(llm_setup: dict) -> None:
     """When provider has auth_token_encrypted, it's decrypted (lines 345-346)."""
@@ -672,6 +719,23 @@ async def test_get_seeded_provider_unknown_raises(
         await svc._get_seeded_provider(ModelProvider.ANTHROPIC)
 
 
+@pytest.mark.asyncio
+async def test_upsert_openai_assignment_without_seed_raises_not_found(
+    db_session: AsyncSession,
+) -> None:
+    """The exact pre-fix failure: assigning a catalog model whose provider
+    type has no seeded `provider_configs` row raises NotFoundError out of
+    `upsert_assignment`. This is what migration `083_seed_openai_provider`
+    fixes — a bare session (no `llm_setup` fixture, so no OPENAI row) proves
+    the seed is load-bearing, not incidental."""
+    svc = ModelRoutingService(db_session)
+    codex_model = _first_model_for_type(ModelProvider.OPENAI)
+    with pytest.raises(NotFoundError):
+        await svc.upsert_assignment(
+            scope=AssignmentScope.GLOBAL, scope_value=None, model_name=codex_model
+        )
+
+
 def test_get_model_routing_service_factory(db_session: AsyncSession) -> None:
     """Factory wraps ModelRoutingService with the given session (line 369)."""
 

tests/integration/test_migration_083_seed_openai_provider.py

@@ -0,0 +1,162 @@
+"""Migration 083 tests — seed_openai_provider.
+
+Verifies the post-upgrade state and exercises the downgrade SQL ordering,
+mirroring ``test_migration_028_seed_self_hosted.py`` and
+``039_seed_grok_provider``'s own shape.
+
+NOT a real alembic round-trip — the suite builds the test DB via
+Base.metadata.create_all (see conftest). Migration 083's upgrade()/downgrade()
+bodies are reviewed here; the tests guard the resulting DB-level contract —
+in particular ``enabled=True`` at seed time, the one detail that diverges
+from GROK's own seed (see the migration's docstring for why: there is no
+``apply_mode="codex"`` write path to flip it later).
+"""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+from uuid import uuid4
+
+import pytest
+from roboco.db.tables import ModelAssignmentTable, ProviderConfigTable
+from roboco.models.base import AssignmentScope, ModelProvider
+from sqlalchemy import text
+
+if TYPE_CHECKING:
+    from sqlalchemy.ext.asyncio import AsyncSession
+
+_INSERT_SQL = text(
+    """
+    INSERT INTO provider_configs
+        (id, name, type, base_url, auth_token_encrypted, enabled, created_at)
+    VALUES
+        (
+            gen_random_uuid(),
+            'Codex (OpenAI)',
+            'openai',
+            'https://api.openai.com/v1',
+            NULL,
+            true,
+            now()
+        )
+    ON CONFLICT (name) DO NOTHING
+    """
+)
+
+
+@pytest.mark.asyncio
+async def test_migration_083_upgrade_insert_contract(
+    db_session: AsyncSession,
+) -> None:
+    """The upgrade INSERT SQL seeds the Codex row ENABLED (unlike GROK's
+    seed, which starts disabled) and is idempotent."""
+    # --- First run: the row should be inserted.
+    await db_session.execute(_INSERT_SQL)
+    await db_session.flush()
+
+    result = await db_session.execute(
+        text(
+            "SELECT name, type, enabled, base_url "
+            "FROM provider_configs "
+            "WHERE name = 'Codex (OpenAI)'"
+        )
+    )
+    rows = list(result)
+    assert len(rows) == 1
+    name, ptype, enabled, base_url = rows[0]
+    assert name == "Codex (OpenAI)"
+    assert ptype == "openai"
+    # The load-bearing assertion: enabled=True at seed time. Seeding False
+    # (GROK's convention) would leave resolve_for_agent silently falling back
+    # to Anthropic forever, since no apply_mode="codex" write path exists to
+    # flip it — the exact "unreachable" failure this migration fixes.
+    assert enabled is True
+    assert base_url == "https://api.openai.com/v1"
+
+    # --- Second run: ON CONFLICT DO NOTHING must not create a duplicate.
+    await db_session.execute(_INSERT_SQL)
+    await db_session.flush()
+
+    result = await db_session.execute(
+        text("SELECT id FROM provider_configs WHERE name = 'Codex (OpenAI)'")
+    )
+    assert len(list(result)) == 1, (
+        "Expected exactly one 'Codex (OpenAI)' row after two INSERT "
+        "executions; ON CONFLICT DO NOTHING must prevent duplicates."
+    )
+
+
+@pytest.mark.asyncio
+async def test_migration_083_downgrade_deletes_assignments_before_config(
+    db_session: AsyncSession,
+) -> None:
+    """Downgrade SQL deletes model_assignments before provider_configs.
+
+    A FK RESTRICT constraint on model_assignments.provider_config_id means
+    deleting provider_configs first would raise an IntegrityError.
+    """
+    suffix = uuid4().hex[:8]
+    openai = ProviderConfigTable(
+        name=f"Codex (OpenAI)-test-{suffix}",
+        type=ModelProvider.OPENAI,
+        enabled=True,
+    )
+    db_session.add(openai)
+    await db_session.flush()
+
+    assignment = ModelAssignmentTable(
+        scope=AssignmentScope.AGENT_SLUG,
+        scope_value=f"test-agent-{suffix}",
+        provider_config_id=openai.id,
+        model_name="gpt-5.3-codex",
+    )
+    db_session.add(assignment)
+    await db_session.flush()
+
+    result = await db_session.execute(
+        text("SELECT id FROM provider_configs WHERE name = :name").bindparams(
+            name=openai.name
+        )
+    )
+    assert result.scalar_one_or_none() is not None
+
+    result = await db_session.execute(
+        text("SELECT id FROM model_assignments WHERE scope_value = :sv").bindparams(
+            sv=assignment.scope_value
+        )
+    )
+    assert result.scalar_one_or_none() is not None
+
+    # Step 1: delete referencing model_assignments first.
+    await db_session.execute(
+        text(
+            "DELETE FROM model_assignments "
+            "WHERE provider_config_id IN ("
+            "    SELECT id FROM provider_configs WHERE name = :name"
+            ")"
+        ).bindparams(name=openai.name)
+    )
+    # Step 2: now safe to delete the provider row.
+    await db_session.execute(
+        text("DELETE FROM provider_configs WHERE name = :name").bindparams(
+            name=openai.name
+        )
+    )
+
+    result = await db_session.execute(
+        text("SELECT id FROM provider_configs WHERE name = :name").bindparams(
+            name=openai.name
+        )
+    )
+    assert result.scalar_one_or_none() is None, (
+        "provider_configs row should be deleted by downgrade"
+    )
+
+    result = await db_session.execute(
+        text("SELECT id FROM model_assignments WHERE scope_value = :sv").bindparams(
+            sv=assignment.scope_value
+        )
+    )
+    assert result.scalar_one_or_none() is None, (
+        "model_assignments row should be deleted before provider_configs"
+    )

tests/unit/billing/test_pricing.py

@@ -61,6 +61,13 @@ _GROK_OUTPUT = 2.00
 _GROK_CACHE_READ = 0.20
 _GROK_CACHE_WRITE = 1.00
 
+# OpenAI Codex — priced non-Anthropic (ChatGPT-subscription CLI, priced here
+# for cost attribution)
+_CODEX_INPUT = 1.75
+_CODEX_OUTPUT = 14.00
+_CODEX_CACHE_READ = 0.175
+_CODEX_CACHE_WRITE = 1.75
+
 # Tolerance for floating-point comparisons
 _TOL = 1e-4
 
@@ -330,6 +337,55 @@ class TestGrokTier:
         assert calculate_cost("grok-build-0.1", tokens_input=_M, tokens_output=0) > 0.0
 
 
+# ---------------------------------------------------------------------------
+# Codex tier (OpenAI — priced non-Anthropic)
+# ---------------------------------------------------------------------------
+
+
+class TestCodexTier:
+    """gpt-5.3-codex pricing — a real input/output split, unlike grok's fold."""
+
+    def test_input_only(self) -> None:
+        cost = calculate_cost("gpt-5.3-codex", tokens_input=_M, tokens_output=0)
+        assert abs(cost - _CODEX_INPUT) < _TOL
+
+    def test_output_only(self) -> None:
+        cost = calculate_cost("gpt-5.3-codex", tokens_input=0, tokens_output=_M)
+        assert abs(cost - _CODEX_OUTPUT) < _TOL
+
+    def test_cached_input(self) -> None:
+        cost = calculate_cost(
+            "gpt-5.3-codex", tokens_input=0, tokens_output=0, tokens_cache_read=_M
+        )
+        assert abs(cost - _CODEX_CACHE_READ) < _TOL
+
+    def test_cache_write(self) -> None:
+        cost = calculate_cost(
+            "gpt-5.3-codex", tokens_input=0, tokens_output=0, tokens_cache_write=_M
+        )
+        assert abs(cost - _CODEX_CACHE_WRITE) < _TOL
+
+    def test_all_token_types(self) -> None:
+        cost = calculate_cost(
+            "gpt-5.3-codex",
+            tokens_input=_M,
+            tokens_output=_M,
+            tokens_cache_read=_M,
+            tokens_cache_write=_M,
+        )
+        expected = _CODEX_INPUT + _CODEX_OUTPUT + _CODEX_CACHE_READ + _CODEX_CACHE_WRITE
+        assert abs(cost - expected) < _TOL
+
+    def test_codex_is_not_treated_as_anthropic(self) -> None:
+        assert _is_anthropic_model("gpt-5.3-codex") is False
+        assert calculate_cost("gpt-5.3-codex", tokens_input=_M, tokens_output=0) > 0.0
+
+    def test_output_is_pricier_than_input(self) -> None:
+        # Codex's real split makes output 8x input — the property grok's
+        # single-total fold structurally cannot express.
+        assert _CODEX_OUTPUT > _CODEX_INPUT
+
+
 # ---------------------------------------------------------------------------
 # Unknown / edge cases — must return 0.0 without raising
 # ---------------------------------------------------------------------------
@@ -489,6 +545,14 @@ class TestCostResult:
         assert result.unpriced is False
         assert result.is_anthropic is False
 
+    def test_priced_non_anthropic_codex_is_not_unpriced(self) -> None:
+        result = calculate_cost_result(
+            "gpt-5.3-codex", tokens_input=_M, tokens_output=0
+        )
+        assert result.cost_usd > 0.0
+        assert result.unpriced is False
+        assert result.is_anthropic is False
+
     def test_calculate_cost_matches_structured_cost_usd(self) -> None:
         model = "claude-opus-4-6"
         assert (

tests/unit/llm/providers/test_codex_auth.py

@@ -0,0 +1,230 @@
+"""codex_auth — keep the Codex CLI credential live via the OAuth refresh grant.
+
+Unlike grok's bundle (keyed by ``<issuer>::<client_id>``, carrying its own
+``expires_at``), the Codex auth.json is flat — ``{tokens: {access_token,
+refresh_token, ...}}`` — and staleness is decided purely by decoding the
+access token's JWT ``exp`` claim.
+"""
+
+from __future__ import annotations
+
+import base64
+import json
+import pathlib
+import threading
+import time
+from datetime import UTC, datetime, timedelta
+from typing import TYPE_CHECKING, Any
+
+from roboco.llm.providers import codex_auth as ca
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+    import pytest
+
+
+def _jwt(exp_unix: int) -> str:
+    """Build a minimal JWT (header.payload.signature) carrying an ``exp`` claim."""
+    payload = (
+        base64.urlsafe_b64encode(json.dumps({"exp": exp_unix}).encode())
+        .rstrip(b"=")
+        .decode()
+    )
+    header = base64.urlsafe_b64encode(b'{"alg":"RS256"}').rstrip(b"=").decode()
+    return f"{header}.{payload}.sig"
+
+
+def _bundle(access_token: str, *, refresh_token: str = "rt") -> dict[str, Any]:
+    return {
+        "auth_mode": "chatgpt",
+        "tokens": {
+            "id_token": "id-tok",
+            "access_token": access_token,
+            "refresh_token": refresh_token,
+            "account_id": "acct-1",
+        },
+        "last_refresh": "2026-01-01T00:00:00Z",
+    }
+
+
+def _write(path: Path, bundle: dict[str, Any]) -> None:
+    path.write_text(json.dumps(bundle), encoding="utf-8")
+
+
+def _exp(delta: timedelta) -> int:
+    return int((datetime.now(UTC) + delta).timestamp())
+
+
+def test_seconds_until_expiry_and_is_valid(tmp_path: Path) -> None:
+    path = tmp_path / "auth.json"
+    token = _jwt(_exp(timedelta(minutes=54)))
+    _write(path, _bundle(token))
+    remaining = ca.seconds_until_expiry(path)
+    assert remaining is not None
+    assert 3100 < remaining < 3300  # noqa: PLR2004 — ~54 minutes
+    assert ca.is_valid(path)
+    assert not ca.is_valid(path, skew_seconds=3600)  # <1h left, 1h skew fails
+
+
+def test_seconds_until_expiry_none_for_missing_or_entryless(tmp_path: Path) -> None:
+    assert ca.seconds_until_expiry(tmp_path / "nope.json") is None
+    path = tmp_path / "auth.json"
+    _write(path, {"tokens": {"account_id": "x"}})  # no access_token
+    assert ca.seconds_until_expiry(path) is None
+
+
+def test_seconds_until_expiry_none_for_non_jwt_access_token(tmp_path: Path) -> None:
+    path = tmp_path / "auth.json"
+    _write(path, _bundle("api-key-not-a-jwt"))
+    assert ca.seconds_until_expiry(path) is None
+
+
+def test_refresh_skips_when_fresh(tmp_path: Path) -> None:
+    path = tmp_path / "auth.json"
+    _write(path, _bundle(_jwt(_exp(timedelta(hours=6)))))
+    calls: list[str] = []
+
+    def _post(url: str, _form: dict[str, str]) -> dict[str, Any]:
+        calls.append(url)
+        return {}
+
+    assert ca.refresh_if_stale(path, post=_post) == "fresh"
+    assert not calls  # no network call when the token is still valid
+
+
+def test_refresh_mints_new_token_when_stale(tmp_path: Path) -> None:
+    path = tmp_path / "auth.json"
+    _write(path, _bundle(_jwt(_exp(timedelta(minutes=-5)))))
+    new_access = _jwt(_exp(timedelta(hours=6)))
+
+    def _post(url: str, form: dict[str, str]) -> dict[str, Any]:
+        assert url == "https://auth.openai.com/oauth/token"
+        assert form["grant_type"] == "refresh_token"
+        assert form["refresh_token"] == "rt"
+        assert form["client_id"]
+        return {
+            "access_token": new_access,
+            "refresh_token": "new-rt",
+            "id_token": "new-id",
+        }
+
+    assert ca.refresh_if_stale(path, post=_post) == "refreshed"
+    bundle = json.loads(path.read_text())
+    assert bundle["tokens"]["access_token"] == new_access
+    assert bundle["tokens"]["refresh_token"] == "new-rt"  # rotated
+    assert bundle["tokens"]["id_token"] == "new-id"
+    assert bundle["last_refresh"] != "2026-01-01T00:00:00Z"
+    assert ca.is_valid(path)
+
+
+def test_refresh_keeps_old_refresh_token_when_response_omits_it(
+    tmp_path: Path,
+) -> None:
+    path = tmp_path / "auth.json"
+    _write(path, _bundle(_jwt(_exp(timedelta(minutes=-1)))))
+
+    def _post(_url: str, _form: dict[str, str]) -> dict[str, Any]:
+        return {"access_token": _jwt(_exp(timedelta(hours=6)))}  # no refresh_token
+
+    assert ca.refresh_if_stale(path, post=_post) == "refreshed"
+    assert json.loads(path.read_text())["tokens"]["refresh_token"] == "rt"
+
+
+def test_refresh_missing_file(tmp_path: Path) -> None:
+    assert ca.refresh_if_stale(tmp_path / "nope.json") == "missing"
+
+
+def test_refresh_no_refresh_token_api_key_mode(tmp_path: Path) -> None:
+    # auth_mode=apikey has no tokens/refresh_token — refresh is a graceful no-op.
+    path = tmp_path / "auth.json"
+    _write(path, {"auth_mode": "apikey", "OPENAI_API_KEY": "sk-x"})
+    assert ca.refresh_if_stale(path) == "no_refresh_token"
+
+
+def test_refresh_failed_on_post_error_leaves_file_untouched(tmp_path: Path) -> None:
+    path = tmp_path / "auth.json"
+    stale = _jwt(_exp(timedelta(minutes=-1)))
+    _write(path, _bundle(stale))
+
+    def _boom(_url: str, _form: dict[str, str]) -> dict[str, Any]:
+        raise RuntimeError("network down")
+
+    assert ca.refresh_if_stale(path, post=_boom) == "failed"
+    assert json.loads(path.read_text())["tokens"]["access_token"] == stale
+
+
+def test_refresh_failed_when_no_access_token(tmp_path: Path) -> None:
+    path = tmp_path / "auth.json"
+    _write(path, _bundle(_jwt(_exp(timedelta(minutes=-1)))))
+    assert ca.refresh_if_stale(path, post=lambda _u, _f: {}) == "failed"
+
+
+def test_refresh_persists_rotated_token_when_atomic_write_fails(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """A rotated refresh_token is single-use; if the atomic write fails after
+    rotation, the direct-write fallback must still land it on disk."""
+    path = tmp_path / "auth.json"
+    _write(path, _bundle(_jwt(_exp(timedelta(minutes=-1)))))
+    new_access = _jwt(_exp(timedelta(hours=6)))
+
+    def _post(_url: str, _form: dict[str, str]) -> dict[str, Any]:
+        return {"access_token": new_access, "refresh_token": "rotated-rt"}
+
+    def _boom_replace(_self: pathlib.Path, _target: pathlib.Path) -> pathlib.Path:
+        raise OSError("replace failed (simulated)")
+
+    monkeypatch.setattr(pathlib.Path, "replace", _boom_replace)
+
+    assert ca.refresh_if_stale(path, post=_post) == "refreshed"
+    tokens = json.loads(path.read_text())["tokens"]
+    assert tokens["refresh_token"] == "rotated-rt"
+    assert tokens["access_token"] == new_access
+
+
+def test_main_check_exit_codes(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
+    home = tmp_path / ".codex"
+    home.mkdir()
+    monkeypatch.setenv("HOME", str(tmp_path))
+    _write(home / "auth.json", _bundle(_jwt(_exp(timedelta(hours=6)))))
+    assert ca.main(["--check"]) == 0
+    _write(home / "auth.json", _bundle(_jwt(_exp(timedelta(minutes=-1)))))
+    assert ca.main(["--check"]) == 1
+
+
+def test_concurrent_refresh_does_not_double_rotate_single_use_token(
+    tmp_path: Path,
+) -> None:
+    """Two near-simultaneous ``refresh_if_stale`` calls must POST the
+    refresh-token grant ONCE — a process-wide lock + re-load inside it makes
+    the loser see the winner's refreshed token and return "fresh" instead of
+    re-rotating (mirrors grok_auth's #94 fix)."""
+    path = tmp_path / "auth.json"
+    _write(path, _bundle(_jwt(_exp(timedelta(minutes=-1)))))
+    posted: list[str] = []
+    post_lock = threading.Lock()
+
+    def _post(_url: str, form: dict[str, str]) -> dict[str, Any]:
+        with post_lock:
+            posted.append(form["refresh_token"])
+        time.sleep(0.1)
+        return {
+            "access_token": _jwt(_exp(timedelta(hours=6))),
+            "refresh_token": "new-rt",
+        }
+
+    results: list[str] = []
+
+    def _run() -> None:
+        results.append(ca.refresh_if_stale(path, post=_post))
+
+    threads = [threading.Thread(target=_run) for _ in range(2)]
+    for t in threads:
+        t.start()
+    for t in threads:
+        t.join()
+
+    assert len(posted) == 1  # exactly one grant POST — no double rotation
+    assert all(r in ("refreshed", "fresh") for r in results)
+    assert "refreshed" in results

tests/unit/llm/providers/test_codex_cli_config.py

@@ -0,0 +1,120 @@
+"""codex_cli_config — mcp-config → config.toml + execpolicy rules + combined
+prompt + per-role sandbox flag."""
+
+from __future__ import annotations
+
+import tomllib
+from typing import TYPE_CHECKING
+
+from roboco.llm.providers import codex_cli_config as cc
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+_SAMPLE_MCP = {
+    "mcpServers": {
+        "roboco-flow": {
+            "command": "uv",
+            "args": ["run", "--no-sync", "python", "-m", "roboco.mcp.flow_server"],
+            "env": {"ROBOCO_AGENT_ID": "be-dev-1", "ROBOCO_AGENT_TOKEN": "tok-123"},
+        },
+        "roboco-do": {"command": "uv", "args": ["run", "x"]},
+        "roboco-optimal": {"command": "uv", "args": ["run", "y"]},
+    }
+}
+
+
+def test_render_config_toml_is_valid_toml_and_injects_env() -> None:
+    parsed = tomllib.loads(cc.render_config_toml(_SAMPLE_MCP))
+    flow = parsed["mcp_servers"]["roboco-flow"]
+    assert flow["command"] == "uv"
+    assert flow["args"][:2] == ["run", "--no-sync"]
+    assert flow["env"]["ROBOCO_AGENT_TOKEN"] == "tok-123"
+    assert "env" not in parsed["mcp_servers"]["roboco-do"]
+
+
+def test_render_config_toml_marks_gateway_pair_required() -> None:
+    parsed = tomllib.loads(cc.render_config_toml(_SAMPLE_MCP))
+    assert parsed["mcp_servers"]["roboco-flow"]["required"] is True
+    assert parsed["mcp_servers"]["roboco-do"]["required"] is True
+    # Every other server is best-effort — no `required` key at all.
+    assert "required" not in parsed["mcp_servers"]["roboco-optimal"]
+
+
+def test_render_config_toml_empty_when_no_servers() -> None:
+    assert cc.render_config_toml({}) == ""
+    assert cc.render_config_toml({"mcpServers": {}}) == ""
+
+
+def test_sandbox_level_developer_is_workspace_write() -> None:
+    assert cc.sandbox_level_for_role("developer") == "workspace-write"
+
+
+def test_sandbox_level_other_delivery_roles_are_read_only() -> None:
+    # Narrower than grok's per-role allows_write (documenter also writes there)
+    # — Codex V1 restricts local sandbox writes to developer only; documenter's
+    # real writes ride the roboco-docs MCP server, not a local file edit.
+    for role in ("qa", "documenter", "pr_reviewer", "cell_pm", "main_pm", ""):
+        assert cc.sandbox_level_for_role(role) == "read-only"
+
+
+def test_codex_cli_args_for_role_carries_sandbox_and_skip_git_check() -> None:
+    dev_args = cc.codex_cli_args_for_role("developer")
+    assert dev_args == ["--sandbox", "workspace-write", "--skip-git-repo-check"]
+    qa_args = cc.codex_cli_args_for_role("qa")
+    assert qa_args == ["--sandbox", "read-only", "--skip-git-repo-check"]
+
+
+def test_render_execpolicy_rules_covers_git_mutation_destructive_and_raw_pm() -> None:
+    rules = cc.render_execpolicy_rules()
+    assert 'prefix_rule(pattern = ["git", "push"], decision = "forbidden")' in rules
+    assert 'prefix_rule(pattern = ["git", "tag", "-d"], decision = "forbidden")' in (
+        rules
+    )
+    assert 'prefix_rule(pattern = ["rm", "-rf"], decision = "forbidden")' in rules
+    assert 'prefix_rule(pattern = ["uv", "run"], decision = "forbidden")' in rules
+    assert 'prefix_rule(pattern = ["pip", "install"], decision = "forbidden")' in rules
+    # Only allow/forbidden decisions — never `prompt` (blocks headless turns).
+    assert "prompt" not in rules
+
+
+def test_write_execpolicy_rules_writes_to_dest(tmp_path: Path) -> None:
+    dest = tmp_path / "rules" / "default.rules"
+    cc.write_execpolicy_rules(dest=dest)
+    assert dest.exists()
+    assert "git" in dest.read_text(encoding="utf-8")
+
+
+def test_render_combined_prompt_joins_system_and_task() -> None:
+    combined = cc.render_combined_prompt("You are the developer.", "Fix the bug.")
+    assert combined.startswith("You are the developer.")
+    assert combined.endswith("Fix the bug.")
+    assert "---" in combined
+
+
+def test_render_combined_prompt_degrades_gracefully() -> None:
+    assert cc.render_combined_prompt("", "task only") == "task only"
+    assert cc.render_combined_prompt("system only", "") == "system only"
+    assert cc.render_combined_prompt("", "") == ""
+
+
+def test_write_combined_prompt_reads_source_and_writes_dest(tmp_path: Path) -> None:
+    src = tmp_path / "system-prompt.md"
+    src.write_text("You are the RoboCo developer.", encoding="utf-8")
+    dest = tmp_path / "prompt.txt"
+    found = cc.write_combined_prompt(
+        task_prompt="Implement the feature.", source=src, dest=dest
+    )
+    assert found is True
+    text = dest.read_text(encoding="utf-8")
+    assert "You are the RoboCo developer." in text
+    assert "Implement the feature." in text
+
+
+def test_write_combined_prompt_degrades_when_source_absent(tmp_path: Path) -> None:
+    dest = tmp_path / "prompt.txt"
+    found = cc.write_combined_prompt(
+        task_prompt="Implement the feature.", source=tmp_path / "absent.md", dest=dest
+    )
+    assert found is False
+    assert dest.read_text(encoding="utf-8") == "Implement the feature."

tests/unit/llm/providers/test_codex_cli_sniff.py

@@ -0,0 +1,188 @@
+"""codex_cli_sniff — classify a Codex run from ONLY its machine-relevant text.
+
+The structural guarantee under test: the model's own on-topic prose (which
+can legitimately contain the words "quota-limited", "login page", or a "429"
+substring inside a commit hash / id) must NEVER reach the classifier, because
+extraction only pulls ``error.message`` fields off error-bearing JSONL events
+plus raw stderr — never ``turn.completed`` / ``item.*`` content.
+"""
+
+from __future__ import annotations
+
+import json
+from typing import TYPE_CHECKING
+
+from roboco.llm.providers import codex_cli_sniff as sniff
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+    import pytest
+
+
+def _write_jsonl(path: Path, lines: list[str]) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text("\n".join(lines) + "\n", encoding="utf-8")
+
+
+def _turn_failed(message: str) -> str:
+    return json.dumps({"type": "turn.failed", "error": {"message": message}})
+
+
+# ---------------------------------------------------------------------------
+# extract_error_text — structural isolation
+# ---------------------------------------------------------------------------
+
+
+def test_extract_error_text_pulls_only_error_message(tmp_path: Path) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(
+        log,
+        [
+            json.dumps(
+                {
+                    "type": "turn.completed",
+                    "usage": {"input_tokens": 1},
+                    "text": "the quota-limited rollout ships this sprint",
+                }
+            ),
+            _turn_failed("real error text"),
+        ],
+    )
+    assert sniff.extract_error_text(log) == "real error text"
+
+
+def test_extract_error_text_empty_for_missing_or_error_less_log(
+    tmp_path: Path,
+) -> None:
+    assert sniff.extract_error_text(tmp_path / "nope.jsonl") == ""
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(log, [json.dumps({"type": "turn.completed", "usage": {}})])
+    assert sniff.extract_error_text(log) == ""
+
+
+# ---------------------------------------------------------------------------
+# The false-positive class this fix exists to kill
+# ---------------------------------------------------------------------------
+
+
+def test_benign_transcript_never_false_parks(tmp_path: Path) -> None:
+    """A transcript whose ONLY content is benign on-topic prose — mentioning
+    "quota-limited" work, a "login page" bug, and a commit hash containing
+    "429" — must classify as "" (no park), because none of it lives in an
+    error field the extractor even looks at."""
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(
+        log,
+        [
+            json.dumps(
+                {
+                    "type": "turn.completed",
+                    "usage": {"input_tokens": 10, "output_tokens": 5},
+                }
+            ),
+            json.dumps(
+                {
+                    "type": "item.completed",
+                    "item": {
+                        "type": "agent_message",
+                        "text": (
+                            "Fixed the quota-limited rollout gate and the "
+                            "login page redirect bug. Committed as abc4291f."
+                        ),
+                    },
+                }
+            ),
+        ],
+    )
+    err_log = tmp_path / "run.err"
+    err_log.write_text("", encoding="utf-8")
+    assert sniff.classify(log, err_log) == ""
+
+
+def test_word_boundary_prevents_429_substring_false_positive() -> None:
+    # "429" embedded inside a larger digit/word run must not match — grok's
+    # own \b429\b pattern, restored here after an initial cut dropped it.
+    assert not sniff.is_rate_limited("commit abc14293 deployed to prod")
+    assert not sniff.is_rate_limited("fix4297abc landed")
+    # "quota" alone legitimately matches wherever it appears (grok's own
+    # pattern, unchanged) — the false-positive class this fix kills is SCOPE
+    # (which text gets scanned, i.e. never turn.completed/item.* content),
+    # not the word "quota" itself. See test_benign_transcript_never_false_parks.
+
+
+def test_bare_login_word_does_not_classify_as_auth() -> None:
+    # "login" was dropped from the auth pattern — a mention of a login PAGE
+    # (this repo's own panel) must not false-park the provider.
+    assert not sniff.is_auth_failure("please visit the login page to continue")
+    assert not sniff.is_auth_failure("login required")
+
+
+# ---------------------------------------------------------------------------
+# True positives — real machine-extracted error text
+# ---------------------------------------------------------------------------
+
+
+def test_real_429_error_message_classifies_rate_limit(tmp_path: Path) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(log, [_turn_failed("Rate limit exceeded: 429 Too Many Requests")])
+    assert sniff.classify(log) == "rate_limit"
+
+
+def test_insufficient_quota_error_message_classifies_rate_limit(
+    tmp_path: Path,
+) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(log, [_turn_failed("insufficient_quota: billing hard limit hit")])
+    assert sniff.classify(log) == "rate_limit"
+
+
+def test_exact_auth_phrase_refresh_token_expired_classifies_auth(
+    tmp_path: Path,
+) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(
+        log, [_turn_failed("Your refresh token has expired, please re-authenticate")]
+    )
+    assert sniff.classify(log) == "auth"
+
+
+def test_exact_auth_phrase_not_signed_in_classifies_auth(tmp_path: Path) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(log, [_turn_failed("Error: not signed in")])
+    assert sniff.classify(log) == "auth"
+
+
+def test_classify_reads_stderr_too(tmp_path: Path) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(log, [json.dumps({"type": "turn.completed", "usage": {}})])
+    err_log = tmp_path / "run.err"
+    err_log.write_text("fatal: 429 too many requests\n", encoding="utf-8")
+    assert sniff.classify(log, err_log) == "rate_limit"
+
+
+def test_classify_missing_files_returns_empty(tmp_path: Path) -> None:
+    assert sniff.classify(tmp_path / "nope.jsonl", tmp_path / "nope.err") == ""
+
+
+def test_rate_limit_checked_before_auth_when_both_present(tmp_path: Path) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(
+        log,
+        [_turn_failed("429 too many requests, and also not signed in downstream")],
+    )
+    assert sniff.classify(log) == "rate_limit"
+
+
+def test_main_cli_prints_classification(
+    tmp_path: Path, capsys: pytest.CaptureFixture[str]
+) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(log, [_turn_failed("429 too many requests")])
+    assert sniff.main([str(log)]) == 0
+    assert capsys.readouterr().out.strip() == "rate_limit"
+
+
+def test_main_cli_no_args_prints_empty(capsys: pytest.CaptureFixture[str]) -> None:
+    assert sniff.main([]) == 0
+    assert capsys.readouterr().out.strip() == ""

tests/unit/llm/providers/test_codex_cli_usage.py

@@ -0,0 +1,159 @@
+"""codex_cli_usage — sum real input/output/cache usage across ``turn.completed``
+events in a captured ``codex exec --json`` JSONL log."""
+
+from __future__ import annotations
+
+import json
+from typing import TYPE_CHECKING
+
+from roboco.llm.providers import codex_cli_usage as cu
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+    import pytest
+
+
+def _turn_completed(
+    *,
+    input_tokens: int,
+    cached_input_tokens: int = 0,
+    cache_write_input_tokens: int = 0,
+    output_tokens: int,
+    reasoning_output_tokens: int = 0,
+) -> str:
+    return json.dumps(
+        {
+            "type": "turn.completed",
+            "usage": {
+                "input_tokens": input_tokens,
+                "cached_input_tokens": cached_input_tokens,
+                "cache_write_input_tokens": cache_write_input_tokens,
+                "output_tokens": output_tokens,
+                "reasoning_output_tokens": reasoning_output_tokens,
+            },
+        }
+    )
+
+
+def _write_jsonl(path: Path, lines: list[str]) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text("\n".join(lines) + "\n", encoding="utf-8")
+
+
+def test_aggregate_sums_across_multiple_turn_completed_events(tmp_path: Path) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(
+        log,
+        [
+            json.dumps({"type": "thread.started"}),
+            json.dumps({"type": "turn.started"}),
+            _turn_completed(
+                input_tokens=1000, cached_input_tokens=200, output_tokens=100
+            ),
+            json.dumps({"type": "item.completed", "item": {"type": "command"}}),
+            _turn_completed(
+                input_tokens=500,
+                cached_input_tokens=100,
+                cache_write_input_tokens=50,
+                output_tokens=80,
+                reasoning_output_tokens=20,
+            ),
+        ],
+    )
+    agg = cu.aggregate_usage_from_jsonl(log)
+    assert agg["input_tokens"] == 1500  # noqa: PLR2004
+    assert agg["cached_input_tokens"] == 300  # noqa: PLR2004
+    assert agg["cache_write_input_tokens"] == 50  # noqa: PLR2004
+    assert agg["output_tokens"] == 180  # noqa: PLR2004
+    assert agg["reasoning_output_tokens"] == 20  # noqa: PLR2004
+    assert agg["turns"] == 2  # noqa: PLR2004
+
+
+def test_aggregate_ignores_turn_failed_and_bad_lines(tmp_path: Path) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(
+        log,
+        [
+            "not json",
+            json.dumps({"type": "turn.failed", "error": {"message": "boom"}}),
+            _turn_completed(input_tokens=10, output_tokens=5),
+        ],
+    )
+    agg = cu.aggregate_usage_from_jsonl(log)
+    assert agg["input_tokens"] == 10  # noqa: PLR2004
+    assert agg["turns"] == 1
+
+
+def test_aggregate_zero_for_missing_or_empty_log(tmp_path: Path) -> None:
+    agg = cu.aggregate_usage_from_jsonl(tmp_path / "nope.jsonl")
+    assert agg["turns"] == 0
+    assert all(v == 0 for k, v in agg.items() if k != "turns")
+
+
+def test_usage_and_cost_treats_cached_as_subset_of_input() -> None:
+    # cached_input_tokens is a SUBSET of input_tokens (not additional) — the
+    # "fresh" input priced at the full rate is the difference.
+    agg = {
+        "input_tokens": 1000,
+        "cached_input_tokens": 300,
+        "cache_write_input_tokens": 0,
+        "output_tokens": 200,
+        "reasoning_output_tokens": 50,
+    }
+    tin, tout, cr, cw, cost = cu.usage_and_cost("gpt-5.3-codex", agg)
+    assert tin == 700  # 1000 - 300  # noqa: PLR2004
+    assert tout == 250  # output + reasoning folded in  # noqa: PLR2004
+    assert cr == 300  # noqa: PLR2004
+    assert cw == 0
+    assert cost > 0.0
+
+
+def test_usage_and_cost_never_goes_negative_when_cached_exceeds_input() -> None:
+    agg = {
+        "input_tokens": 10,
+        "cached_input_tokens": 50,  # malformed/inconsistent upstream data
+        "cache_write_input_tokens": 0,
+        "output_tokens": 0,
+        "reasoning_output_tokens": 0,
+    }
+    tin, *_rest = cu.usage_and_cost("gpt-5.3-codex", agg)
+    assert tin == 0
+
+
+def test_capture_run_usage_writes_usage_json(tmp_path: Path) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(log, [_turn_completed(input_tokens=100, output_tokens=50)])
+    out = tmp_path / "usage.json"
+    tokens = cu.capture_run_usage(run_log=log, model="gpt-5.3-codex", out_path=out)
+    assert tokens == (100, 50, 0, 0)
+    data = json.loads(out.read_text())
+    assert data["model"] == "gpt-5.3-codex"
+    assert data["tokens_input"] == 100  # noqa: PLR2004
+    assert data["tokens_output"] == 50  # noqa: PLR2004
+    assert data["turns"] == 1
+    assert data["cost_usd"] > 0.0
+
+
+def test_main_writes_usage_file(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    log = tmp_path / "run.jsonl"
+    _write_jsonl(log, [_turn_completed(input_tokens=200, output_tokens=100)])
+    out = tmp_path / "usage.json"
+    monkeypatch.setattr(cu, "USAGE_OUT_PATH", out)
+    monkeypatch.setenv("ROBOCO_CODEX_RUN_LOG", str(log))
+    monkeypatch.setenv("ROBOCO_AGENT_MODEL", "gpt-5.3-codex")
+    assert cu.main() == 0
+    data = json.loads(out.read_text())
+    assert data["tokens_input"] == 200  # noqa: PLR2004
+    assert data["tokens_output"] == 100  # noqa: PLR2004
+
+
+def test_main_warns_when_run_log_env_missing(
+    monkeypatch: pytest.MonkeyPatch, caplog: pytest.LogCaptureFixture
+) -> None:
+    monkeypatch.delenv("ROBOCO_CODEX_RUN_LOG", raising=False)
+    with caplog.at_level("WARNING", logger="roboco.llm.providers.codex_cli_usage"):
+        assert cu.main() == 0
+    assert any("ROBOCO_CODEX_RUN_LOG" in r.message for r in caplog.records)

tests/unit/llm/test_providers.py

@@ -19,6 +19,7 @@ from unittest.mock import AsyncMock, MagicMock, patch
 import pytest
 from roboco.llm.providers import (
     ClaudeCodeProvider,
+    CodexCliProvider,
     GrokCliProvider,
     ProviderError,
     ProviderNotRegisteredError,
@@ -37,6 +38,16 @@ def _isolate_grok_auth(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> Path:
     return tmp_path
 
 
+@pytest.fixture(autouse=True)
+def _isolate_codex_auth(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> Path:
+    """Point CODEX_AUTH_HOST_PATH at a fresh tmp dir (parity with grok above)."""
+    codex_dir = tmp_path / "codex-auth"
+    monkeypatch.setattr(
+        "roboco.llm.providers.codex.CODEX_AUTH_HOST_PATH", str(codex_dir)
+    )
+    return codex_dir
+
+
 def _config(
     *,
     agent_id: str = "be-dev-1",
@@ -85,6 +96,9 @@ class _FakeHost:
     def _ensure_grok_usage_dir(self, agent_id: str) -> None:
         self.data_dirs_ensured.append(agent_id)
 
+    def _ensure_codex_usage_dir(self, agent_id: str) -> None:
+        self.data_dirs_ensured.append(agent_id)
+
     def _resolve_host_paths(
         self, config: OrchestratorAgentConfig, agent_settings_path: Path | None
     ) -> dict[str, str | None]:
@@ -94,6 +108,7 @@ class _FakeHost:
             else None,
             "settings": str(agent_settings_path) if agent_settings_path else None,
             "grok_usage": f"/host/data/grok-usage/{config.agent_id}",
+            "codex_usage": f"/host/data/codex-usage/{config.agent_id}",
         }
 
     def _build_mount_args(
@@ -312,6 +327,156 @@ async def test_grok_spawn_raises_on_docker_failure() -> None:
         await provider.spawn(_config())
 
 
+# ---------------------------------------------------------------------------
+# CodexCliProvider
+# ---------------------------------------------------------------------------
+
+
+def _codex_config(
+    *,
+    agent_id: str = "be-dev-1",
+    provider_base_url: str | None = "https://api.x.ai/v1",
+    provider_auth_token: str | None = "should-not-leak",
+    mcp_config_path: Path | None = Path("/host/mcp-configs/be-dev-1.json"),
+) -> OrchestratorAgentConfig:
+    return OrchestratorAgentConfig(
+        agent_id=agent_id,
+        blueprint_path=Path("/app/system-prompt.md"),
+        model="gpt-5.3-codex",
+        mcp_config_path=mcp_config_path,
+        claude_session_id="sess-1",
+        provider_type="openai",
+        provider_base_url=provider_base_url,
+        provider_auth_token=provider_auth_token,
+    )
+
+
+async def test_codex_spawn_requires_mcp_config() -> None:
+    provider = CodexCliProvider(_FakeHost())
+    with pytest.raises(ProviderError, match="MCP config"):
+        await provider.spawn(_codex_config(mcp_config_path=None))
+
+
+async def test_codex_spawn_does_not_require_api_key() -> None:
+    # Subscription auth (mounted ~/.codex) — a missing provider key is fine.
+    host = _FakeHost()
+    provider = CodexCliProvider(host)
+    with patch("asyncio.create_subprocess_exec", AsyncMock(return_value=_proc())):
+        result = await provider.spawn(_codex_config(provider_auth_token=None))
+    assert result.instance_id == "roboco-agent-be-dev-1"
+
+
+async def test_codex_spawn_no_leaked_key_and_no_anthropic_leak() -> None:
+    host = _FakeHost()
+    provider = CodexCliProvider(host, image="roboco-agent-codex:test")
+    with patch(
+        "asyncio.create_subprocess_exec", AsyncMock(return_value=_proc())
+    ) as exec_mock:
+        await provider.spawn(_codex_config(), initial_prompt="do the work")
+    cmd = list(exec_mock.call_args.args)
+    assert not any(c.startswith("OPENAI_API_KEY=") for c in cmd)
+    # The provider endpoint must NOT be injected as an Anthropic var.
+    assert not any(c.startswith("ANTHROPIC_BASE_URL=") for c in cmd)
+    assert not any(c.startswith("ANTHROPIC_AUTH_TOKEN=") for c in cmd)
+    assert host.mount_config is not None
+    assert host.mount_config.provider_base_url is None
+    assert host.mount_config.provider_auth_token is None
+
+
+async def test_codex_spawn_wires_gateway_env_and_image_last() -> None:
+    host = _FakeHost()
+    provider = CodexCliProvider(host, image="roboco-agent-codex:test")
+    with patch(
+        "asyncio.create_subprocess_exec", AsyncMock(return_value=_proc())
+    ) as exec_mock:
+        result = await provider.spawn(_codex_config())
+    cmd = list(exec_mock.call_args.args)
+    assert "ROBOCO_MCP_CONFIG=/app/mcp-config.json" in cmd
+    assert "ROBOCO_AGENT_ID=be-dev-1" in cmd
+    assert "ROBOCO_AGENT_MODEL=gpt-5.3-codex" in cmd
+    # Usage capture: per-agent data dir mounted + the entrypoint's usage file.
+    assert host.data_dirs_ensured == ["be-dev-1"]
+    assert "/host/data/codex-usage/be-dev-1:/home/agent/.codex-usage" in cmd
+    assert "ROBOCO_CODEX_USAGE_FILE=/home/agent/.codex-usage/usage.json" in cmd
+    assert "ROBOCO_AGENT_TOKEN=hmac-be-dev-1" in cmd
+    assert cmd[-1] == "roboco-agent-codex:test"
+    assert host.removed == ["roboco-agent-be-dev-1"]
+    assert host.remove_stop_reasons == ["pre_spawn_stale_clear"]
+    assert result == SpawnResult(
+        instance_id="roboco-agent-be-dev-1",
+        extra={"container_id": "cid", "model": "gpt-5.3-codex"},
+    )
+
+
+async def test_codex_spawn_mounts_auth_when_present(
+    _isolate_codex_auth: Path,
+) -> None:
+    _isolate_codex_auth.mkdir(parents=True, exist_ok=True)
+    (_isolate_codex_auth / "auth.json").write_text("{}", encoding="utf-8")
+    host = _FakeHost()
+    provider = CodexCliProvider(host)
+    with patch(
+        "asyncio.create_subprocess_exec", AsyncMock(return_value=_proc())
+    ) as exec_mock:
+        await provider.spawn(_codex_config())
+    cmd = list(exec_mock.call_args.args)
+    # Mount the host ~/.codex DIRECTORY (ro), not the single auth.json file —
+    # a single-file bind mount pins the inode (same concern grok documents).
+    expected = f"{_isolate_codex_auth}:/home/agent/.codex-auth-ro:ro"
+    assert expected in cmd
+
+
+async def test_codex_spawn_omits_auth_mount_when_absent() -> None:
+    host = _FakeHost()
+    provider = CodexCliProvider(host)
+    with patch(
+        "asyncio.create_subprocess_exec", AsyncMock(return_value=_proc())
+    ) as exec_mock:
+        await provider.spawn(_codex_config())
+    cmd = list(exec_mock.call_args.args)
+    assert not any("/home/agent/.codex-auth-ro" in c for c in cmd)
+
+
+async def test_codex_spawn_warns_when_auth_absent(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    caplog.set_level("WARNING", logger="roboco.llm.providers.codex")
+    host = _FakeHost()
+    provider = CodexCliProvider(host)
+    with patch("asyncio.create_subprocess_exec", AsyncMock(return_value=_proc())):
+        await provider.spawn(_codex_config())
+    warnings = [r for r in caplog.records if r.levelname == "WARNING"]
+    assert warnings, "expected a spawn-time WARNING for the missing host auth.json"
+    msg = warnings[0].getMessage()
+    assert "auth.json" in msg
+    assert "codex login" in msg
+
+
+async def test_codex_spawn_prompt_is_injection_safe() -> None:
+    host = _FakeHost()
+    provider = CodexCliProvider(host)
+    nasty = "--model evil --session-id pwned"
+    with patch(
+        "asyncio.create_subprocess_exec", AsyncMock(return_value=_proc())
+    ) as exec_mock:
+        await provider.spawn(_codex_config(), initial_prompt=nasty)
+    cmd = list(exec_mock.call_args.args)
+    assert f"ROBOCO_INITIAL_PROMPT={nasty}" in cmd
+    assert nasty not in cmd
+
+
+async def test_codex_spawn_raises_on_docker_failure() -> None:
+    provider = CodexCliProvider(_FakeHost())
+    with (
+        patch(
+            "asyncio.create_subprocess_exec",
+            AsyncMock(return_value=_proc(returncode=1, stderr=b"boom")),
+        ),
+        pytest.raises(ProviderError, match="boom"),
+    ):
+        await provider.spawn(_codex_config())
+
+
 # ---------------------------------------------------------------------------
 # ClaudeCodeProvider
 # ---------------------------------------------------------------------------

tests/unit/runtime/test_codex_rate_limit.py

@@ -0,0 +1,158 @@
+"""CODEX 429/auth parking: same exit-code convention as grok, scoped to
+ModelProvider.OPENAI so a numeric-code collision with another provider's crash
+can never mis-park (see ``_CODEX_RATE_LIMIT_EXIT_CODE`` / ``_CODEX_AUTH_EXIT_CODE``
+in ``roboco.runtime.orchestrator``).
+"""
+
+from __future__ import annotations
+
+from unittest.mock import AsyncMock
+
+import pytest
+from roboco.models.runtime import AgentInstance
+from roboco.runtime.orchestrator import (
+    _CODEX_AUTH_EXIT_CODE,
+    _CODEX_RATE_LIMIT_EXIT_CODE,
+    AgentOrchestrator,
+    AgentState,
+)
+
+
+def _codex_instance(provider_type: str = "openai") -> AgentInstance:
+    cfg = type("C", (), {"provider_type": provider_type, "model": "gpt-5.3-codex"})()
+    inst = AgentInstance(agent_id="be-dev-1", state=AgentState.ACTIVE, config=cfg)
+    inst.current_task_id = "task-1"
+    inst.container_id = "cid"
+    return inst
+
+
+class _FakeTracker:
+    def __init__(self) -> None:
+        self.activated_with: dict[str, object] | None = None
+
+    async def activate(
+        self,
+        *,
+        retry_after: float,
+        affected_agents: list[str],
+        kind: str = "rate_limited",
+    ) -> None:
+        self.activated_with = {
+            "retry_after": retry_after,
+            "affected_agents": affected_agents,
+            "kind": kind,
+        }
+
+
+def test_is_codex_rate_limit_exit() -> None:
+    inst = _codex_instance()
+    assert AgentOrchestrator._is_codex_rate_limit_exit(
+        inst, _CODEX_RATE_LIMIT_EXIT_CODE
+    )
+    assert not AgentOrchestrator._is_codex_rate_limit_exit(inst, 0)
+    assert not AgentOrchestrator._is_codex_rate_limit_exit(inst, 1)
+    # A grok exit at the SAME numeric code must NOT be classified as codex.
+    assert not AgentOrchestrator._is_codex_rate_limit_exit(
+        _codex_instance(provider_type="grok"), _CODEX_RATE_LIMIT_EXIT_CODE
+    )
+    assert not AgentOrchestrator._is_codex_rate_limit_exit(
+        _codex_instance(provider_type="anthropic"), _CODEX_RATE_LIMIT_EXIT_CODE
+    )
+
+
+def test_is_codex_auth_exit() -> None:
+    inst = _codex_instance()
+    assert AgentOrchestrator._is_codex_auth_exit(inst, _CODEX_AUTH_EXIT_CODE)
+    assert not AgentOrchestrator._is_codex_auth_exit(inst, 0)
+    assert not AgentOrchestrator._is_codex_auth_exit(inst, 1)
+    assert not AgentOrchestrator._is_codex_auth_exit(
+        _codex_instance(provider_type="grok"), _CODEX_AUTH_EXIT_CODE
+    )
+
+
+@pytest.mark.asyncio
+async def test_park_codex_rate_limited_activates_and_offlines(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    orch._waiting_records = {}
+    orch._rate_limit_ceo_notified = set()
+    inst = _codex_instance()
+    inst.error_count = 2  # pretend prior crashes — parking must NOT count one
+    tracker = _FakeTracker()
+    monkeypatch.setattr(orch, "_make_tracker", lambda _p: tracker)
+    finalize = AsyncMock()
+    monkeypatch.setattr(orch, "_finalize_spawn_session", finalize)
+    monkeypatch.setattr(orch, "_persist_waiting_record", AsyncMock())
+
+    await orch._park_codex_rate_limited("be-dev-1", inst)
+
+    finalize.assert_awaited_once()
+    assert inst.state == AgentState.OFFLINE
+    assert inst.container_id is None
+    assert inst.error_count == 0  # a 429 is not a crash
+    assert tracker.activated_with == {
+        "retry_after": pytest.approx(60.0),
+        "affected_agents": ["be-dev-1"],
+        "kind": "rate_limited",
+    }
+
+
+@pytest.mark.asyncio
+async def test_park_codex_auth_unavailable_activates_with_auth_missing_kind(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    orch._waiting_records = {}
+    orch._rate_limit_ceo_notified = set()
+    inst = _codex_instance()
+    inst.error_count = 2
+    tracker = _FakeTracker()
+    monkeypatch.setattr(orch, "_make_tracker", lambda _p: tracker)
+    monkeypatch.setattr(orch, "_finalize_spawn_session", AsyncMock())
+    monkeypatch.setattr(orch, "_persist_waiting_record", AsyncMock())
+
+    await orch._park_codex_auth_unavailable("be-dev-1", inst)
+
+    assert inst.state == AgentState.OFFLINE
+    assert inst.container_id is None
+    assert inst.error_count == 0
+    assert tracker.activated_with == {
+        "retry_after": pytest.approx(60.0),
+        "affected_agents": ["be-dev-1"],
+        "kind": "auth_missing",
+    }
+
+
+@pytest.mark.asyncio
+async def test_handle_stopped_container_parks_on_codex_429(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    inst = _codex_instance()
+    park = AsyncMock()
+    finalize = AsyncMock()
+    monkeypatch.setattr(orch, "_park_codex_rate_limited", park)
+    monkeypatch.setattr(orch, "_finalize_spawn_session", finalize)
+
+    await orch._handle_stopped_container("be-dev-1", inst, _CODEX_RATE_LIMIT_EXIT_CODE)
+
+    park.assert_awaited_once_with("be-dev-1", inst)
+    finalize.assert_not_awaited()
+
+
+@pytest.mark.asyncio
+async def test_handle_stopped_container_parks_on_codex_auth_exit(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    inst = _codex_instance()
+    park = AsyncMock()
+    finalize = AsyncMock()
+    monkeypatch.setattr(orch, "_park_codex_auth_unavailable", park)
+    monkeypatch.setattr(orch, "_finalize_spawn_session", finalize)
+
+    await orch._handle_stopped_container("be-dev-1", inst, _CODEX_AUTH_EXIT_CODE)
+
+    park.assert_awaited_once_with("be-dev-1", inst)
+    finalize.assert_not_awaited()

tests/unit/runtime/test_codex_usage_finalize.py

@@ -0,0 +1,166 @@
+"""OPENAI (codex) agents capture real input/output/cache-split token usage
+from their captured ``usage.json`` — unlike grok's single cumulative total,
+codex's JSONL carries a genuine split (see ``codex_cli_usage``), so finalize
+must return the real 4-tuple instead of folding everything into output.
+"""
+
+from __future__ import annotations
+
+import json
+import tempfile
+from typing import TYPE_CHECKING
+
+import httpx
+import pytest
+from roboco.models.runtime import AgentInstance
+from roboco.runtime import orchestrator as orch_mod
+from roboco.runtime.orchestrator import AgentOrchestrator
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+
+def _write_usage(path: Path, **fields: object) -> None:
+    payload = {
+        "model": "gpt-5.3-codex",
+        "tokens_input": 0,
+        "tokens_output": 0,
+        "tokens_cache_read": 0,
+        "tokens_cache_write": 0,
+        "cost_usd": 0.0,
+        "turns": 1,
+        **fields,
+    }
+    path.write_text(
+        json.dumps(payload),
+        encoding="utf-8",
+    )
+
+
+def test_codex_usage_returns_real_split(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    usage = tmp_path / "usage.json"
+    _write_usage(
+        usage, tokens_input=700, tokens_output=250, tokens_cache_read=300, turns=2
+    )
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    monkeypatch.setattr(
+        orch, "_codex_usage_json", lambda _aid: json.loads(usage.read_text())
+    )
+
+    expected_turns = 2
+    assert orch._codex_usage_tokens("be-dev-1") == (700, 250, 300, 0)
+    assert orch._codex_usage_turns("be-dev-1") == expected_turns
+
+
+def test_read_usage_json_contained_refuses_escape(tmp_path: Path) -> None:
+    """A '..' id resolves outside the usage root and must be refused —
+    basename alone does not neutralize '..', the containment check does."""
+    (tmp_path / "usage.json").write_text('{"leak": 1}', encoding="utf-8")
+    base = tmp_path / "root"
+    base.mkdir()
+
+    assert AgentOrchestrator._read_usage_json_contained(base, "..") is None
+
+
+def test_read_usage_json_contained_reads_inside_root(tmp_path: Path) -> None:
+    agent_dir = tmp_path / "be-dev-1"
+    agent_dir.mkdir()
+    (agent_dir / "usage.json").write_text('{"total_tokens": 5}', encoding="utf-8")
+
+    data = AgentOrchestrator._read_usage_json_contained(tmp_path, "be-dev-1")
+    assert data == {"total_tokens": 5}
+
+
+def test_codex_usage_zero_when_store_missing(monkeypatch: pytest.MonkeyPatch) -> None:
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    monkeypatch.setattr(orch, "_codex_usage_json", lambda _aid: None)
+    assert orch._codex_usage_tokens("be-dev-1") == (0, 0, 0, 0)
+    assert orch._codex_usage_turns("be-dev-1") == 0
+
+
+@pytest.mark.asyncio
+async def test_resolve_final_usage_routes_openai_to_usage_json(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    monkeypatch.setattr(
+        orch,
+        "_codex_usage_json",
+        lambda _aid: {
+            "tokens_input": 12,
+            "tokens_output": 34,
+            "tokens_cache_read": 5,
+            "tokens_cache_write": 1,
+        },
+    )
+    cfg = type("C", (), {"provider_type": "openai"})()
+    orch._instances = {"be-dev-1": AgentInstance(agent_id="be-dev-1", config=cfg)}
+
+    assert await orch._resolve_final_token_usage("be-dev-1") == (12, 34, 5, 1)
+
+
+@pytest.mark.asyncio
+async def test_resolve_final_turns_tools_routes_openai_to_usage_json(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    monkeypatch.setattr(orch, "_codex_usage_turns", lambda _aid: 3)
+    cfg = type("C", (), {"provider_type": "openai"})()
+    orch._instances = {"be-dev-1": AgentInstance(agent_id="be-dev-1", config=cfg)}
+
+    # Codex has no tool-call signal — tool_calls stays 0.
+    assert await orch._resolve_final_turns_tools("be-dev-1") == (3, 0)
+
+
+@pytest.mark.asyncio
+async def test_resolve_active_tokens_routes_openai_to_usage_json(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    monkeypatch.setattr(
+        orch,
+        "_codex_usage_json",
+        lambda _aid: {"tokens_input": 12, "tokens_output": 34},
+    )
+    cfg = type("C", (), {"provider_type": "openai"})()
+    orch._instances = {"be-dev-1": AgentInstance(agent_id="be-dev-1", config=cfg)}
+    async with httpx.AsyncClient() as client:
+        assert await orch._resolve_active_tokens(client, "be-dev-1") == (12, 34, 0, 0)
+
+
+def test_codex_usage_dir_branches_compose_vs_local(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.setattr(orch_mod, "PROJECT_HOST_PATH", "")
+    local = AgentOrchestrator._codex_usage_dir("be-dev-1")
+    assert "roboco-codex-usage" in str(local)
+    assert local.name == "be-dev-1"
+
+    monkeypatch.setattr(orch_mod, "PROJECT_HOST_PATH", "/volume1/roboco")
+    monkeypatch.setattr(orch_mod, "CODEX_USAGE_DATA_DIR", "/data/codex-usage")
+    assert str(AgentOrchestrator._codex_usage_dir("be-dev-1")) == (
+        "/data/codex-usage/be-dev-1"
+    )
+
+
+@pytest.mark.parametrize(
+    "bad",
+    ["..", ".", "../etc", "a/b", "a\\b", "", "be-dev-1/../x", "x\x00y"],
+)
+def test_codex_usage_dir_rejects_path_traversal(bad: str) -> None:
+    with pytest.raises(ValueError, match="unsafe agent id"):
+        AgentOrchestrator._codex_usage_dir(bad)
+
+
+def test_codex_usage_json_reads_the_real_local_dir(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    monkeypatch.setattr(orch_mod, "PROJECT_HOST_PATH", "")
+    monkeypatch.setattr(tempfile, "gettempdir", lambda: str(tmp_path))
+    udir = tmp_path / "roboco-codex-usage" / "be-dev-1"
+    udir.mkdir(parents=True)
+    _write_usage(udir / "usage.json", tokens_input=55, tokens_output=10)
+    orch = AgentOrchestrator.__new__(AgentOrchestrator)
+    assert orch._codex_usage_tokens("be-dev-1") == (55, 10, 0, 0)