Adds a fast per-PR gate that asserts previously-shipped fixes are still
present in the tree — the CI analogue of the ruflo witness fix-marker
system, but self-contained (no plugin dependency, reviewable as plain
JSON). Complements the heavier checks (firmware build, deterministic
pipeline proof, release witness bundle) by catching the silent-revert
class of regression that build+test wouldn't.
- scripts/fix-markers.json manifest: 11 markers (RuView#396, #521,
#517, #505, #354, #263, #266/#321, #265, #232/#375/#385/#386/#390,
ADR-028 proof + witness bundle). Each has files / require (literal
substring or /regex/) / optional forbid / rationale / ref.
- scripts/check_fix_markers.py stdlib-only checker. Exit 0 clean /
1 regression / 2 bad manifest. Modes: --list, --json, --only ID.
- .github/workflows/fix-regression-guard.yml runs on PR + push to
main/master; gates on the checker and writes the result table into
the run summary + an artifact.
If a fix is intentionally removed, update scripts/fix-markers.json in the
same PR with a rationale — the diff becomes the audit trail.
Co-Authored-By: claude-flow <ruv@ruv.net>
