Summary
Honest residual limit from Scenario 4: deep semantic paraphrase ("how do threads coordinate with counters?" ↔ semaphore memory) produces Unknown. There is no synonym table and no embeddings.
What to do
- Add an optional embedding layer that produces a second index alongside the trie path index.
- Retrieval path: path-key retrieval first; on Unknown/Partial, fall back to embedding nearest-neighbor.
- Keep embedding layer opt-in and gated behind a feature flag — the core "no embeddings" claim should still hold for the default build.
Acceptance
- Feature-flagged build recovers the semaphore-via-counters paraphrase query.
- Default build unchanged; all current tests pass.
Links
docs/design/honest_agent/progress.md Phase B residual.- M2 baseline comparison issue (compare fallback quality to pure-vector baseline).
Summary
Honest residual limit from Scenario 4: deep semantic paraphrase ("how do threads coordinate with counters?" ↔ semaphore memory) produces Unknown. There is no synonym table and no embeddings.
What to do
Acceptance
Links
docs/design/honest_agent/progress.mdPhase B residual.