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Dragan Spiridonov
77d3f09159
Headline change: native HNSW search actually works again. The previous
NativeHnswBackend wrapped @ruvector/router 0.1.28's VectorDb, which a
fresh investigation found to have four serious bugs:
1. HNSW search returned essentially random results — recall@10 ≈ 0%
on the project's FNV fixture and 10% on textbook unit-Gaussian
random vectors. The graph walk could not find self-vectors when
querying with a stored vector.
2. The VectorDb constructor unconditionally wrote a vectors.db redb
file to the user's project root, polluting CWD with multi-MB
files outside .agentic-qe/, in a non-SQLite format that no AQE
migration or backup tooling knew about.
3. Process-wide singleton lock — only ONE VectorDb instance could
exist per process. Subsequent constructors threw "Database error:
Database already open. Cannot acquire lock."
4. NAPI dispose did not synchronously release the redb lock — root
cause of v3.9.5's futex deadlock.
NativeHnswBackend was rewritten to wrap hnswlib-node@^3.0.0 (the
canonical Yury Malkov C++ Hnswlib reference implementation, used by
Pinecone, Weaviate, Qdrant, LangChain, ChromaDB). All four bugs are
gone in one swap. Empirical verification: 100% recall@10 vs the old
10%, faster inserts, multiple instances coexist, no CWD pollution.
useNativeHNSW default is flipped back from false to true (reverting
the v3.9.5 hotfix). Users with large codebases get sublinear HNSW
search by default again.
aqe init now warns when it detects a stale `vectors.db` from the
previous version and suggests `rm vectors.db`. It does NOT auto-delete
(per the data protection rules).
No new dependency was added — hnswlib-node was already in package.json.
Bumps fleetVersion in skills-manifest.json from 3.9.2 (stale) to
3.9.6 to match.
Adds release notes at docs/releases/v3.9.6.md and updates the
release index.
Closes #399. Closes #396 (test-suite cleanup carried over from the
closed PR #403, also in this release).
See ADR-090 for the full decision record and CHANGELOG.md for the
user-facing summary.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>