📦 WP-082 — test(losses): objective invariant gate

Research log · Phase 6 — Evaluation, v0.1.0

🔗 Depends on WP-078, WP-079 · Needed by WP-083

⬅️ WP-079 · Roadmap · WP-083 ➡️

WP-082 — objective invariant gate

Written after WP-078 and WP-079 survived 474 tests and three tier runs, which is the fact that justifies the package: the suite was large and did not contain the shape of test that would have caught either.

The useful negative result is the test not written. An obvious guard for WP-078's defect is "the L1 term must not exceed some share of the objective". On a converged fixture the broken pixel frame reads 10.7% against the correct frame's 1.5% — both comfortably under any threshold anyone would have picked. Such a test would look like protection and catch nothing. The gate pins the coordinate frame directly instead (1/stride against the pixel frame, per level) and its scale on a near-converged state (0.75 stride-units against 5.99 broken).