Delegate implementation and review tasks to external AI CLI tools (Codex, Gemini) with cross-model adversarial review
This skill delegates implementation and review tasks to external AI CLI tools (OpenAI Codex CLI, Google Gemini CLI), enabling cost savings through cheaper models and cross-model adversarial review that eliminates single-model blind spots. Three core principles govern every interaction: one job per invocation (an external tool implements OR reviews, never self-validates), minimal permissions (sandboxed execution scoped to the task's working directory with only the tool's own API key), and the orchestrator verifies independently (external tools report facts only, the orchestrator judges pass/fail).
| Tool | Install | Auth |
|---|---|---|
| OpenAI Codex CLI | npm i -g @openai/codex | API key or ChatGPT subscription |
| Google Gemini CLI | npm i -g @google/gemini-cli | Google login (free 1K req/day) or API key |
Neither tool is strictly required. The skill adapts based on what is available (see Escalation Model below).
Per-project config at .tribunal/external-tools.yaml (optional -- if absent, external tools are not used):