HNSWVectorIndex now supports optional memory bounding:
- New max_entries parameter sets soft limit on number of entries
- When limit reached, lowest importance entries are evicted
- Eviction uses importance (ascending) then age (oldest first) ordering
- eviction_batch_size controls how many entries evicted at once
Changes:
- Add max_entries and eviction_batch_size parameters
- Add _evict_entries() method for importance-based eviction
- Update get_memory_stats() to report budget_bytes and evictions
- Update stats() to include eviction metrics
- Update save_index/load_index to persist eviction settings
- Add 5 new tests for eviction behavior
DiffCompressor:
- Parse unified diff format and compress by reducing context lines
- Preserve file headers and all +/- change lines
- Score hunks by relevance (error keywords, query matches)
- Add summary line: [N files, +X -Y lines]
- Expected 30-50% savings on typical git diffs
- Wire into content router for CompressionStrategy.DIFF
- 30 tests covering parsing, compression, edge cases
hnswlib SIGILL fix:
- Move hnswlib import from module level to lazy loading
- hnswlib crashes with SIGILL (Illegal Instruction) on CPUs
without AVX support, before Python can catch the error
- Now imports only when HNSWVectorIndex is actually used
- HNSW_AVAILABLE is checked lazily via __getattr__
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Wrap hnswlib import in try/except in hnsw.py
- Export HNSW_AVAILABLE flag from adapters module
- Add helpful error message when HNSWVectorIndex is used without hnswlib
- Add @pytest.mark.skipif to HNSW test classes
hnswlib requires C++ compilation and may not be available on all
platforms or Python versions in CI environments.
