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* fix: restore libSQL vector search with dynamic embedding dimensions (#655) The V9 migration dropped the libsql_vector_idx and changed memory_chunks.embedding from F32_BLOB(1536) to BLOB, but the documented brute-force cosine fallback was never implemented. hybrid_search silently returned empty vector results — search was FTS5-only on libSQL. Add ensure_vector_index() which dynamically creates the vector index with the correct F32_BLOB(N) dimension, inferred from EMBEDDING_DIMENSION / EMBEDDING_MODEL env vars during run_migrations(). Uses _migrations version=0 as a metadata row to track the current dimension (no-op if unchanged, rebuilds table on dimension change). Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * style: move safety comments above multi-line assertions for rustfmt stability Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * refactor: remove unnecessary safety comments from test code Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * fix: address review comments from PR #1393 [skip-regression-check] - Share model→dimension mapping via config::embeddings::default_dimension_for_model() instead of duplicating the match table (zmanian, Copilot) - Add dimension bounds check (1..=65536) to prevent overflow (zmanian, Copilot) - DROP stale memory_chunks_new before CREATE to handle crashed previous attempts (zmanian, Copilot) - Use plain INSERT instead of INSERT OR IGNORE to surface constraint errors (Copilot) Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * fix: add missing builder field to AgentDeps in telegram routing test [skip-regression-check] The self-repair builder field was added to AgentDeps in #712 but this test was not updated. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * fix: address zmanian's second review on PR #1393 - Add tracing::info when resolve_embedding_dimension returns None (#2) - Document connection scoping for transaction safety (#1) - Document _rowid preservation for FTS5 consistency (#4) - Document precondition that migrations must run first (#5) - Note F32_BLOB dimension enforcement in insert_chunk (#3) - Add unit tests for resolve_embedding_dimension (#6) Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> --------- Co-authored-by: Claude Opus 4.6 (1M context) <[email protected]>