docs: clarify BL-036/BL-047 implementation details#55
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April 3, 2026 07:04
…20623 - Create OPENCODE_COMPATIBILITY.md with detailed diagnosis and solutions - Document Issue #20623: OpenCode plugin loader breaks native NAPI addons in v1.3.8+ - Add troubleshooting checklist and decision tree - Update README with compatibility badge and new issues section - Update QUICK_START with version note and error reference - Update docs/README with new compatibility document NAPI Issue Details: - Affected: OpenCode v1.3.8 - v1.3.13 - Root cause: PR #20112 plugin loader refactor - Workaround: Downgrade to v1.3.7 - Status: Issue #20623 open, no ETA for fix Solutions provided: 1. Downgrade to v1.3.7 (immediate) 2. Improve error messaging (interim) 3. Migrate to pure JS backend (long-term)
…observability - BL-036: Add env var LANCEDB_OPENCODE_PRO_VECTOR_INDEX_THRESHOLD (default 1000) for automatic IVF_PQ index creation when scope entries exceed threshold - memory_stats to expose searchMode field (in-memory-cosine | native-ivf) - pruneScope to emit warning when exceeding maxEntriesPerScope - BL-047: Expand to cover both embedding fallback AND search mode observability - memory_stats searchMode field to disclose current vector search mode - embedding fallback retains graceful degradation with structured warnings
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Summary
Clarify implementation details for BL-036 (LanceDB ANN fast-path) and BL-047 (search mode observability) in roadmap and backlog documentation.
Changes
BL-036 - LanceDB ANN fast-path for large scopes
LANCEDB_OPENCODE_PRO_VECTOR_INDEX_THRESHOLDenv var (default: 1000)searchModefield inmemory_statstool (in-memory-cosine|native-ivf)pruneScopeexceedsmaxEntriesPerScopeBL-047 - Embedding fallback & search mode observability
memory_statsto disclose current vector search modeMotivation
Based on codebase analysis, the current design uses in-memory cosine similarity for all vector searches. As scopes grow (up to 3000 entries), users should be aware of:
This PR provides implementation guidance for future BL-036/BL-047 work.