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golangLAKEHOUSE/reports/cutover/gauntlet_2026-05-02/parity/embed_parity.md
root c0a55b1182 parity reports: regenerated 2026-05-03 morning verification 
All 6 probes re-run post-restart for today's verification:
  validator(6/6) + extract_json(12/12) + session_log(4/4) +
  materializer(2/2) + embed(8/8) + subject_audit(6/6) = 38/38
2026-05-03 05:27:14 -05:00

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/v1/embed cross-runtime parity probe

Date: 2026-05-03T05:16:39Z Rust: http://127.0.0.1:3100/ai/embed · Go: http://127.0.0.1:4110/v1/embed Model: nomic-embed-text (forced — overrides each side's default) Match metric: cosine similarity ≥ 0.99999

Identical text → both endpoints. Cosine compares vector DIRECTION (the operationally-meaningful property for HNSW retrieval); byte-equal isn't expected because Go round-trips through float32 internally while Rust stays at f64.

Tally: 8 match · 0 diff (out of 8 fixtures)

Cosine ≥ 0.99999 on every fixture — embed parity holds post-sidecar-drop. Rust and Go produce vectors that point in the same direction in 768-dim space.