retrieval.ts (1192 lines — ABOVE its 1171 frozen baseline) is the memory
retrieval engine (DB + vector + rerank network). Extract the pure, DB-free
scoring/conversion helpers (+ the MemoryRow row shape they share) verbatim into
a self-contained leaf, leaving all DB/vector/network code in the host:
- retrieval/scoring.ts (104) interface MemoryRow + estimateTokens,
parseMetadata, rowToMemory, getRelevanceScore
Host retrieval.ts: 1192 -> 1072 — back UNDER the 1171 frozen baseline (the split
also repairs the pre-existing file-size drift). The leaf imports only ../types,
never the host, so check:cycles stays clean (no cycle). MemoryRow moved to the
leaf and imported back as a type by the host's DB row functions. The public
estimateTokens is re-exported from the leaf; the host also imports it for its
internal token-budget loops. The other three helpers were module-internal, so
the public API is unchanged (7 exports). Bodies moved byte-identical.
Behavior-preserving: 38 existing memory-retrieval consumer tests stay green
(rerank 5, hybrid 6, semantic 6, engine-status 9, stats-api 12); new
tests/unit/retrieval-scoring-split.test.ts (11 assertions) pins
estimateTokens (ceil(len/4)) + parseMetadata + rowToMemory mapping +
getRelevanceScore (+20 phrase / +3 token) and guards the public API.
Refs #3501.
f60fd398b6