W024's committed rule (state-consistency.cts) is a documented permanent
no-op — its real check runs in cmdValidateHealth itself, outside the
rule table, since readStateHeadFreshness needs a git-log shell-out no
Rule.check may perform. The guard's §8.5 fixture-proof check previously
"passed" for W024 only because some test file's title happened to
contain the string "W024" — not because any fixture actually proves it
fires, which it structurally never can. Found by the Spec-axis
orthogonal review.
Adds an explicit PERMANENTLY_INERT_CODES map (currently just W024,
with its reason recorded) that checkFixtureProofInvariant reports
separately from real coverage. The guard's PASS output now says
"30 covered by a real fixture, 1 exempted" instead of implying uniform
proof — a code with no coverage and no exemption entry still fails.
Enforces ADR-3180 §8.2's 1:1 rule-code invariant (every code unique,
every severity a property of the Rule) and §8.5's fixture-proof
invariant (every code has a describe()/test() block naming it,
verified statically against tests/health-diagnostic-rules/*.test.cjs
and tests/health-diagnostic.test.cjs) for the new RULES table.
Adapted from the design doc's original plan of separate
tests/fixtures/health-diagnostic/<code>.* files: implementation used
inline temp-dir fixtures instead (mirrors tests/planning-snapshot.test.cjs),
so coverage is checked statically against test-file structure, mirroring
lint-fix-has-regression-test.cjs's house style. Wired into lint:ci
adjacent to lint-planning-snapshot-bypass-drift.cjs, its closest sibling.
Passes clean against the real tree: 31 codes, all unique, all covered.
