Spec Kitty

└─ kitty-specs
   └─ Regression-slice test cleanup

Mission Run:

Data Model: Regression-slice test cleanup

No product data changes. The mission's working entities:

Ledger row — file, test count, runtime, verdict (MARKER-ONLY | SPLIT-BY-KIND | SHIFT-LEFT | RETIRE | FIX | KEEP), covering guard, evidence id. Source: the issue body.
Planted-break record — id, product file + edit, guard files run, result (RED n failed / GREEN), reverted (yes). Invariant: every RETIRE or trimmed SHIFT-LEFT test maps to ≥1 record with a RED result; a GREEN result flips the verdict to KEEP.
Marker state per test — the set of markers a collected test carries. Invariant: every test keeps ≥1 tier marker routed by CI (C-004).