codex git:20260402.f454146A

Immutable. This exact content never changes and is served at /api/v1/blob/691bd053a8a794f5.

---
name: codex
description: Delegate tasks or get a second opinion from OpenAI Codex CLI.
  Infers mode (delegation vs validation) from prompt context. Detects
  available models at runtime via the CLI. Use when cross-validating code,
  plans, or architecture with Codex CLI, or offloading work to it.
  Do not use when already running inside Codex CLI or for tasks
  that do not benefit from cross-model input.
---

# Cross-Agent Task Runner — OpenAI Codex CLI

## Procedures

**Step 1: Self-Call Detection**

1. Check for `codex` in process ancestry (no dedicated env var exists for Codex CLI).
2. If detected, stop and inform the user:
   "Cannot invoke Codex from within Codex. Use a different target CLI."

**Step 2: Execute Shared Procedure**

1. Read `references/shared-procedure.md` for the core workflow
   (mode inference, context gathering, prompt construction, result presentation).
2. Read `references/cli-codex.md` for Codex-specific flags, model selection
   heuristics, and version compatibility matrix.
3. Follow the shared procedure using the Codex-specific details.