Upgrade embedding model to bge-small-en-v1.5#9
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Replaces all-MiniLM-L6-v2 (256 token context, MTEB ~60th) with bge-small-en-v1.5 (512 token context, MTEB ~30th). Same 384 dimensions — no migration or re-index schema change needed. Key improvement: chunks up to 512 tokens are now fully embedded instead of silently truncated at 256. This fixes a quality issue where the second half of larger chunks was invisible to semantic search. Trade-off: model download grows from 23MB to 127MB (one-time). Users must delete ~/.engraph/models/ and run engraph index --rebuild after upgrading. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
all-MiniLM-L6-v2(2021, 256 token context, MTEB ~60th) withbge-small-en-v1.5(2023, 512 token context, MTEB ~30th)Breaking change
Users must delete
~/.engraph/models/and runengraph index --rebuildafter upgrading. The old model files are incompatible.Trade-off
Model download grows from 23MB to 127MB (one-time).
Test plan
cargo test --test integration -- --ignored)engraph indexwith new model, verify search quality improvement on long notes🤖 Generated with Claude Code