Document root cause of Smoke Codex failure in PR #10182

[Copilot]

The Smoke Codex workflow failed on PR #10182 due to Docker's restriction on mounting to root directory /. The PR attempted --mount /:/:ro to expose the entire host filesystem, but Docker explicitly prohibits bind mount destinations at /.

Root Cause

Container awf-agent Error: invalid volume specification: '/:/:ro': 
invalid mount config for type "bind": invalid specification: destination can't be '/'

PR #10182 modified engine execution files to prepend --mount /:/:ro, expecting subsequent mounts to override specific paths. Docker rejects this before container creation.

Analysis

• Workflow run: https://github.com/githubnext/gh-aw/actions/runs/21053692908
• Failed step: "Run Codex" during docker compose up -d
• Impact: Zero - main branch unaffected, only blocks PR Mount entire host filesystem as read-only to AWF container #10182 testing

Recommended Fix (for PR #10182)

Mount specific system directories instead of root:

--mount /usr:/usr:ro \
--mount /lib:/lib:ro \
--mount /lib64:/lib64:ro \
--mount /bin:/bin:ro \
--mount /sbin:/sbin:ro \
--mount /etc:/etc:ro \
--mount /opt:/opt:ro

This achieves the goal of broader filesystem access within Docker's constraints.

Detailed Analysis

See /tmp/smoke-codex-failure-analysis.md for complete technical analysis, three solution options with tradeoffs, and implementation recommendations.

Conclusion: Not a gh-aw bug - PR #10182 needs revised approach to work within Docker limitations.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[agentics] Smoke Codex failed</issue_title>
<issue_description>## Workflow Failure

Status: Failed
Workflow: Smoke Codex
Run URL: https://github.com/githubnext/gh-aw/actions/runs/21053692908

Root Cause

The agentic workflow has encountered a failure. This indicates a configuration error, runtime issue, or missing dependencies that must be resolved.

Action Required

Agent Assignment: This issue should be debugged using the agentic-workflows agent.

Instructions for Agent:

1. Analyze the workflow run logs at: https://github.com/githubnext/gh-aw/actions/runs/21053692908
2. Identify the specific failure point and error messages
3. Determine the root cause (configuration, missing tools, permissions, etc.)
4. Propose specific fixes with code changes or configuration updates
5. Validate the fix resolves the issue

Agent Invocation:

/agent agentic-workflows

When prompted, instruct the agent to debug this workflow failure.

Expected Outcome

• Root cause identified and documented
• Specific fix provided (code changes, configuration updates, or dependency additions)
• Verification that the fix resolves the failure

Generated from Smoke Codex

Comments on the Issue (you are @copilot in this section)

• Fixes [agentics] Smoke Codex failed #10188

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