Archaeology only; nothing built, reconnected, or promoted.
The champion is two DISCONNECTED estimates: the letter is engine1's additive
factor index (zero references to p_win or any probability in engine1.js), and
p_win is probabilityEstimator's frequencyOver + 5 heuristic layers, computed
after and merely attached. The live grade path never calls the Python service.
The Python three-layer engine is NOT DEPLOYED — no python/pip in the
Dockerfile; app.js only health-checks it. So Layers 1-2 never shipped.
Layer 3 is wired BACKWARDS: grade_thresholds.json maps PROBABILITY->GRADE and
the live JS reads it in reverse to manufacture confidence from an
already-chosen letter. Per-sport market-efficiency scaling is specced-absent.
Consequence stated plainly: every metric audited to date is on the shadow
model, not the specced engine, which has never been measured.
Sport boundary TESTED not asserted: a new sport on the live path is a ~10-file
core edit with four documented silent-failure modes. Per-sport records DO
exist (sports.mlb n=526/62% vs pooled overall n=937/58%, each n>=20 gated),
but /api/accuracy ignores ?sport= and the pooled overall would absorb a new
sport. Park x weather confirmed challenger-only; xwOBA and leash absent.
Recovery map is dependency-ordered with MLB as the reference module.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QJs13VsyiSKYQP6rj3NNmc
