Automatically invoke when CI checks fail on a PR. Triggers on: any mention of CI failure, red checks, failed GitHub Actions, or "CI is broken/failing". Reads session handoffs and a known-issues log to avoid repeating failed fix attempts. Do NOT wait for user to ask — invoke as soon as a CI failure is confirmed. Not for local-only test failures (use test-fix instead) or lint-only failures with an obvious single-line fix.
