digital-drosophila/registry/phase4ak-apl-timing-validation/evidence/REPORT.md

Phase 4AK — frozen D18 independent validation

Status: PASS-FROZEN-D18-INDEPENDENT-VALIDATION.

Numerical gate: True. Seed-validation pass: True. Novel-to-AJ pass: True. Novel dynamics executed: True. Unauthorized unlock: False. Both cohorts and all requested inputs were locked before trajectories; no tuning or gate changes. Original sealed AJ runtime functions are used unchanged, including 1,212 unreplaced non-KC APL fast edges. The second six odors were not used for AG/AJ calibration; old 4L had simulated the full panel. Static seed audit is bounded, not proof of universally unused or statistically independent RNG streams. Brian LIF/FIFO is independent; APL arithmetic is intentionally shared and separately component-audited. Old frozen integrity: True. Five old reference trials: True. No learning, plasticity update, candidate, game, decoder, RL or Web. This is not completion of the learning goal. Next gate: Credit specificity and real KC-to-MBON functional transfer before conditioning