- 427 orphaned dashboard test files ran in NO gate; 395 now gated via self-maintaining backfill lanes (glob minus curated minus skip-list), 31 pre-existing failures + build-output skip-listed with reasons
- settings -t name-filter lanes replaced by one unfiltered lane (describe blocks can no longer fall through filters)
- scripts/check-test-inventory.mjs: --capture/--diff superset harness + --dashboard-curated completeness guard
- pr-checks.yml: engine-slow CI gate (non-empty assertion) + inventory guard job
- docs/testing.md: guard, skip-list policy, harness usage
