softnanolab Codex Second Opinion
Delegate a task to OpenAI's Codex CLI for an independent review or second opinion.
Input
If no task is provided, ask the user what they want Codex to review.
How to Use
Run Codex in non-interactive mode with read-only sandbox:
codex exec --full-auto --skip-git-repo-check -s read-only -C "<current working directory>" "<prompt>" 2>/dev/null
Prompt Construction
Build a self-contained prompt for Codex that includes:
- Context: The repo path, what project this is, and what folder/files are relevant
- The task: What you want Codex to do (review, validate, suggest, etc.)
- Constraints: Tell it to only read files, not modify anything
Keep it unbiased. Do not include your own conclusions or preferred answer. Present the problem neutrally so Codex forms its own opinion.
Be specific about files. Tell Codex exactly which files to read — it has access to the repo but needs direction.
Example
codex exec --full-auto --skip-git-repo-check -s read-only -C "/path/to/project" \
"Review the file at src/config.py. Is the retry logic correct? Read the file and give your assessment. Do NOT modify any files." 2>/dev/null
Troubleshooting
- Sandbox restrictions: If Codex output is empty, retry with
dangerouslyDisableSandbox: trueon the Bash call. ThecodexCLI needs network access and may spawn subprocesses that hit sandbox limits. - Output truncation: Codex may run many tool calls (file reads, experiments), producing very large output. Keep prompts focused and ask specific questions rather than open-ended reviews. If output is truncated, the empirical results are still valuable — look for the data in the tool call results even if the final summary is missing.
--skip-git-repo-check: Always include this flag to avoid errors in repos with uncommitted changes.
After Codex Responds
- Report the Codex response to the user
- Note where you agree or disagree with Codex's assessment
- Let the user decide how to proceed