# /v1/embed cross-runtime parity probe

**Date:** 2026-05-05T08:22:55Z
**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._
