fix-pr-ci
Diagnose, reproduce, fix, and push solutions for failing or timing-out workflow lanes on a GitHub PR. Triages all failing checks, clusters them by root cause, presents a unified diagnosis (gate 1), applies approved fixes, verifies every affected lane passes locally, then pushes (gate 2). All proposed fixes are validated against docs/FOUNDATIONS.md. Use after pushing a branch and creating a PR when CI reports failing or timing-out lanes.