ThumbGate Guard

Escalate the agent's most recent mistake into an enforced ThumbGate prevention rule — a PreToolUse block gate that intercepts the same bad tool-call shape before it runs again, in this session and every future one (Claude Code, Cursor, Codex, Gemini, Amp, Cline).

This skill wraps existing ThumbGate capability and adds no new logic — it routes to the real capture_feedback + force-promote path.

Workflow

1. Name the mistake. From the recent conversation, state the specific bad action in one

sentence (e.g. git push --force origin main, DROP TABLE users, deploy without tests).

1. Capture it with the capture_feedback MCP tool: signal: "down", context,

whatWentWrong, whatToChange, tags. If the user only gave a vague signal, pass the recent turns as conversationWindow / chatHistory for history-aware distillation instead of refusing.

1. Promote it to an enforced gate:

   npx thumbgate force-gate "<one-sentence context of the mistake>"

This prints the new gateId and the active gate count.

1. Confirm enforcement. Show the user the promoted rule and state that it is now a PreToolUse

block — not just a logged note.

Full capture_feedback field contract, force-gate flags, and the guided first-rule walkthrough (npx thumbgate quickstart) are in references/capture-and-promote.md.

Example

Input: "the agent force-pushed to main and overwrote a teammate's commit — never again"

Action:

1. capture_feedback → signal: down, context: "agent force-pushed to main, overwrote a teammate's commit", whatWentWrong: "destructive force-push to a shared branch", whatToChange: "block force-push to main", tags: "git,force-push".
2. npx thumbgate force-gate "force-push to main overwrote a teammate's commit".
3. Report: the real gateId + "force-push to main is now blocked as a PreToolUse check."

Troubleshooting

• "Vague feedback rejected": add whatWentWrong + whatToChange, or pass conversationWindow

so it can distill from history.

• `force-gate` prints nothing or errors: ThumbGate may not be wired — run the thumbgate-doctor skill.
• Rule didn't fire next time: confirm it is active with the thumbgate-rules skill and that

hooks are installed (thumbgate-doctor).

Quality checklist (self-verify before delivering)

• [ ] I named one specific bad tool-call shape, not a vague complaint.
• [ ] I captured it with capture_feedback (signal: down) including whatWentWrong + whatToChange.
• [ ] I promoted it with npx thumbgate force-gate and reported the real gateId.
• [ ] I confirmed it is now enforced as a PreToolUse block, not just logged.
• [ ] I added no new logic — only the existing capture + force-promote paths were used.