fusion-lint-taxonomy-warnings-non-blocking-by-design

The fusion-invariants-lint taxonomy check emits WARN (not ERROR) for banned-synonym drift — this is intentional design. Warnings surface tightening opportunities (Mismatch→Drift, api spec→Contract, data shape→Schema) without failing the build, giving operators visibility without breaking CI. New overlays can introduce warnings that need a follow-up cleanup pass; the zero-warnings standard requires actively eliminating each WARN, not just accepting them as permanent noise.