| name | codex-cli-reference |
| description | Reference documentation for invoking Codex through the wrapper scripts. This skill should be used when calling Codex, invoking Codex CLI, delegating tasks to Codex, running Codex in background, or managing Codex sessions. Covers codex-start.sh, codex-wait.sh, codex-get-session-id.sh, query file handling, and session management. |
Codex Invocation Reference
Quickstart for invoking OpenAI Codex through the Claude Code wrapper scripts.
⛔ Critical Rules
NEVER use heredocs for file creation — they are blocked by hooks. Use the Write tool.
NEVER invoke codex exec directly — always use the wrapper scripts.
Workflow
- Create query file —
mktemp /tmp/claude/codex-query.XXXXXX
- Write query —
Write({ file_path, content }) (NOT heredoc)
- Start Codex —
codex-start.sh <workdir> <query-file> [session-id] → prints RUNDIR
- Wait for completion —
codex-wait.sh <rundir>; repeat until exit 0 (any nonzero = call again)
- Read the response — it is the stdout of
codex-wait.sh (the extracted agent reply). The <rundir>/output file is raw JSONL for debugging only.
- Get session ID (for follow-ups) —
codex-get-session-id.sh <rundir>
Minimal Session Example
Bash({ command: "mktemp /tmp/claude/codex-query.XXXXXX" })
# → /tmp/claude/codex-query.a1B2c3
Write({ file_path: "/tmp/claude/codex-query.a1B2c3", content: "Analyze the codebase" })
Bash({
command: "~/.claude/scripts/codex/codex-start.sh /path/to/workspace /tmp/claude/codex-query.a1B2c3",
dangerouslyDisableSandbox: true
})
# → /tmp/claude/codex.X1y2Z3 (RUNDIR)
Bash({
command: "~/.claude/scripts/codex/codex-wait.sh /tmp/claude/codex.X1y2Z3",
dangerouslyDisableSandbox: true
})
# exit 0 → stdout IS the agent's response. Any nonzero → call again.
Bash({
command: "~/.claude/scripts/codex/codex-get-session-id.sh /tmp/claude/codex.X1y2Z3",
dangerouslyDisableSandbox: true
})
# → 019e7072-675a-7312-b0dc-a040ab91cda9 (UUID session id, for resume)
dangerouslyDisableSandbox: true is required for all three scripts (stryker-incremental.json and the lock dir are sandbox-protected).
For per-script parameter tables, output format, resume/session details, and troubleshooting, see reference.md.
