fix: pass OPENCODE_CONFIG_EXTRA and CODEX_CONFIG_EXTRA to sandbox containers (closes #77)

[Yambr]

Summary

• Adds OPENCODE_CONFIG_EXTRA to OPENCODE_PASSTHROUGH_ENVS and CODEX_CONFIG_EXTRA to CODEX_PASSTHROUGH_ENVS in computer-use-server/docker_manager.py, so the orchestrator passes operator-supplied config overrides into spawned sandbox containers.
• Extends tests/orchestrator/test_passthrough_isolation.py to lock in the new allowlist entries and the per-CLI isolation contract (Pitfall 1): claude forbids both, codex expects only CODEX_CONFIG_EXTRA, opencode expects only OPENCODE_CONFIG_EXTRA.

Why

Per issue #77: the Dockerfile entrypoint (line 428–449) already consumes OPENCODE_CONFIG_EXTRA to render /tmp/opencode.json from operator-supplied JSON, and docs/cli-config-templates.md documents this as the supported override surface for proxy-only routing (LiteLLM, OpenLLM, etc.). But the var was missing from the orchestrator's per-CLI passthrough allowlist, so it never crossed the orchestrator → sandbox boundary — operators could not route opencode through a self-hosted gateway without a local source patch. Same gap applied to CODEX_CONFIG_EXTRA.

This PR is a 2-line allowlist addition; no version bump, no docs changes (docs were already correct — this makes the code match).

Test plan

• pytest tests/orchestrator/test_passthrough_isolation.py -v — 3 parametrize cases pass
• pytest tests/orchestrator/test_docker_manager.py -v — 10 module-load tests, no regression
• E2E (optional, matches issue [v0.9.2.2] OPENCODE_CONFIG_EXTRA missing from OPENCODE_PASSTHROUGH_ENVS — proxy-only routing impossible without local patch #77 reproducer): rebuild image with --platform linux/amd64, set OPENCODE_CONFIG_EXTRA in .env, recreate computer-use-server, confirm docker exec <sandbox> printenv | grep OPENCODE_CONFIG_EXTRA is non-empty and /tmp/opencode.json reflects the operator override.

Closes #77.

Summary by CodeRabbit

• Chores

  • Environment variables CODEX_CONFIG_EXTRA and OPENCODE_CONFIG_EXTRA can now be passed through to their respective runtimes.

• Tests

  • Enhanced test coverage for environment variable isolation in container environments.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: d1da9e63-fc96-4cbd-b698-f205741a5f2d

📥 Commits

Reviewing files that changed from the base of the PR and between 7ee37b3 and 09d0bd8.

📒 Files selected for processing (1)

• computer-use-server/docker_manager.py

📝 Walkthrough

Walkthrough

The PR extends Docker environment variable passthrough allowlists in the orchestrator to include CODEX_CONFIG_EXTRA and OPENCODE_CONFIG_EXTRA, enabling operators to inject custom CLI configurations into spawned workspace containers. Tests verify these variables are correctly isolated per sub-agent runtime.

Changes

Environment Variable Allowlist Expansion

Layer / File(s)	Summary
Configuration Allowlists computer-use-server/docker_manager.py	Added CODEX_CONFIG_EXTRA to CODEX_PASSTHROUGH_ENVS (line 123) and OPENCODE_CONFIG_EXTRA to OPENCODE_PASSTHROUGH_ENVS (line 134) to permit these host env vars to be injected into spawned workspace sandbox containers.
Test Setup & Cleanup tests/orchestrator/test_passthrough_isolation.py	Extended _clear_phase6_auth_env() (lines 82–86) to clear the new config-extra vars before each parametrized test run and extended the host overrides dict (lines 130–134) to set both vars for exercise during test execution.
Parametrized Test Assertions tests/orchestrator/test_passthrough_isolation.py	Updated parametrization cases (lines 95–110) so codex expects CODEX_CONFIG_EXTRA, opencode expects OPENCODE_CONFIG_EXTRA, and claude forbids both, validating per-CLI allowlist isolation.

Estimated Code Review Effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

A rabbit hops through configs with glee,
New env vars flow where they ought to be—
Codex and opencode, each gets their own,
Custom JSON configs in sandbox zones! 🐰✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and specifically describes the main changes: adding OPENCODE_CONFIG_EXTRA and CODEX_CONFIG_EXTRA to sandbox container passthrough environments and closing the referenced issue.
Linked Issues check	✅ Passed	The PR fully addresses issue #77 by adding OPENCODE_CONFIG_EXTRA and CODEX_CONFIG_EXTRA to passthrough allowlists, enabling operator-supplied config overrides in sandbox containers and fixing proxy-only routing as documented.
Out of Scope Changes check	✅ Passed	All changes are scoped to the specific requirements: passthrough allowlist additions in docker_manager.py and corresponding test updates to validate per-CLI isolation, with no unrelated modifications.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/issue-77-pr

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