Implements five of the six enhancements from docs/kb-enhancements-proposal.htm,
closing the retrieval-quality gap identified in the qmd review.
- Cross-encoder reranking: new kb/reranker.py loads an optional reranking
model at startup (KB_RERANK_ENABLED, KB_RERANKER_MODEL,
KB_RERANK_CANDIDATES). Search degrades gracefully to plain hybrid
retrieval when the model is absent. Exposed via a "rerank" block in
/status, a rerank flag on search, and --no-rerank in the CLI.
- RRF rank fusion: FTS and vector lists now merge by reciprocal rank
fusion with a top-rank bonus, replacing the old score blend. Scores are
comparable across queries.
- Bench harness and explain traces: kb bench runs a query fixture against
each backend and reports precision@k, recall and MRR. --explain returns a
per-result score breakdown.
- Tag context descriptions: tags carry an optional one-line description
(kb tag-describe), returned as tag_contexts with search results. Adds a
tags.description column migration.
- Structured data ingestion: .json/.yaml/.toml files ingest as text via the
new "data" doc type, pretty-printing minified JSON before chunking.
Query expansion (proposal item 5) is deliberately left out pending bench
results. Requires engine v3.3.0.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The MCP SDK's DNS rebinding protection rejects remote clients with 421
when the Host header isn't in the allowlist. Add KB_MCP_ALLOWED_HOSTS env
var (comma-separated IPs/FQDNs) to configure additional allowed hosts
while keeping localhost always permitted.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
New MCP server (mcp/) exposes kb operations as native MCP tools over
Streamable HTTP with Bearer token auth. Supports collections via tag
conventions, chunked file uploads, and agent-side search patterns.
Engine gains PATCH /api/v1/notes/{id} for in-place note updates with
transactional re-chunk/re-embed, and updated_at column on documents.
Go client adds updatenote command and Patch HTTP method.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Persist uploaded files to {data_dir}/documents/{content_hash}{ext} after
successful ingestion. Add GET /documents/{id}/file endpoint for retrieval,
delete stored files on document deletion, and add `kb export` client command.
Includes schema migration, tests, and spec updates.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Remove v1 Python CLI (src/kb_search/, tests/, root pyproject.toml, uv.lock, .venv)
- Add Go client with cross-platform build (client/)
- Add FastAPI engine with NVIDIA and multi-stage ROCm Dockerfiles (engine/)
- Add VERSION files for client and engine, wired into builds
- Add release.sh for automated build, tag, release, and Docker push
- Update README with build/release docs and ROCm migration note
- Clean up .gitignore for v2 project structure
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
steve