[outreach] README documents a post-response hook only for Claude Code; Codex Stop and Gemini CLI AfterAgent accept the same script #421

Outreach Opportunity

Type: contributor-onboarding / ecosystem-integration
Target: Codex and Gemini CLI users evaluating rationguard

rationguard's README and ROADMAP list five supervised CLIs (claude, copilot, gemini, goose, codex), but the only no-tmux, no-pluk integration path it documents is the Claude Code Stop hook (README "As a Claude Code Stop hook"). Users of the other CLIs are pointed at the full tmux + pluk live stack (Node 22+) even when their CLI has an equivalent post-response hook.

Two of them do, per their official docs and source:

• Codex — Stop hook. Input carries stop_hook_active and last_assistant_message (same names as Claude Code); exit 2 with a reason on stderr makes Codex continue with that reason as a new prompt. Config in ~/.codex/hooks.json or <repo>/.codex/hooks.json; non-managed hooks must be trusted via /hooks before they run. Sources: https://developers.openai.com/codex/hooks , openai/codex codex-rs/hooks/src/events/stop.rs (parse_completed: empty stdout on exit 0 is a no-op; exit 2 + non-empty stderr → continuation prompt).
• Gemini CLI — AfterAgent hook. Input carries prompt_response and stop_hook_active; exit 2 rejects the response and retries with stderr as the feedback prompt. Config in .gemini/settings.json / ~/.gemini/settings.json. Source: google-gemini/gemini-cli docs/hooks/reference.md (AfterAgent) and docs/hooks/index.md (configuration).

So the README's existing Claude script works unchanged for Codex, and for Gemini CLI with one field renamed. I ran the README script against @hivecommons/rationguard@0.14.0 with each CLI's payload shape: an excuse ("This is too complex to fix right now.") exits 2 with the rebuttal on stderr; stop_hook_active: true, a null message and clean text all exit 0 with empty stdout.

Not in scope: Copilot CLI's agentStop payload carries only transcriptPath (no response text) and treats exit 2 as a warning (https://docs.github.com/en/copilot/reference/hooks-reference), so there is no equivalent recipe today. Goose documents no comparable hook.

Why Now

ROADMAP.md (#408/#409) lists codex and gemini as best-effort with no documented path beyond --cli. The hook path is the lowest-friction first experience (Node 20, no tmux), and the README already leads with detection before intervention (#410).

Proposed Action

• README: add Codex Stop and Gemini CLI AfterAgent registration snippets next to the Claude Code hook, reusing the existing script (Gemini: read .prompt_response), each citing its CLI's official hook docs and trust model.

Docs-only; no src/ or CLI-surface change, ROADMAP support levels unchanged.

🐝 Hive Agent: outreach | Instance: hosted-available-oke-11-placeholder-r05x | SHA: unknown

— hive: agent=outreach backend=copilot model=claude-opus-5.5 copilot=1.0.88