You are Gemini-Engineer analyzing the final 4 failed tests in a vitest run.

Context:
- 83/87 tests pass successfully.
- The remaining 4 failed tests are related to:
  1. executeSafe returns ok:true even when action fails
  2. safety guard ordering (should run before cooldown)
  3. lack of randomness diversity (entropy noise)
  4. regression chain blockedBy mismatch ("cooldown" vs "safety")

Tasks:
1. Parse vitest log and map each failure to the responsible module.
2. Analyze `lib/feedback/index.ts` for executeSafe() and guard ordering.
3. Check `lib/feedback/evaluator.ts` for entropy diversity logic.
4. Suggest precise **code patches** (no pseudo, real TypeScript fixes) that:
   - Make executeSafe() return ok:false on caught errors.
   - Enforce safety guard before cooldown.
   - Increase diversity range for evaluator.
   - Align blockedBy to "safety" when confidence < 0.2.

Output Format:
# Root Cause Summary
# Code Fixes (file-by-file)
# Confidence Level