fix

Use to fix a reported bug spec-first: reproduce it, trace the symptom to the owning feature's acceptance criteria, pin it with a failing (RED) test, apply the minimal GREEN fix through the same per-task gate implement uses, then patch the spec so the bug class can't silently return. Triggers on "fix {bug}", "fix the bug in {slug}", "bug in {feature}", "/sdd:fix {slug}", "regression in {slug}", "полагодь баг", "виправ багу", "регресія в {slug}", "чому зламалось". Triage is three-way: AC exists and is violated (regression) / AC is ambiguous (spec-bug — patch the wording) / no AC covers it (gap — add one, marked added-by-fix). Works on a repo with no specs at all (soft mode — code-first, recommends survey after). Writes a fix record under docs/features/{slug}/_fixes/ and commits with an SDD-Fix trailer.