Flexible task search with prefix matching, slug search, and ranked results - #40
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Multi-strategy search replaces the single FTS5 query:
1. Exact task ID match
2. FTS5 prefix search ranked by BM25
3. Task ID substring match (LIKE)
4. Title substring fallback (LIKE)
Key changes:
- FTS query builder uses prefix syntax (word*) instead of exact ("word")
- Task ID now indexed as searchable FTS column (was UNINDEXED)
- Results ranked by BM25 relevance instead of updated_at
- Fix: task_update title rename no longer wipes FTS content index
- Fix: gateway PATCH route now preserves content+tags in FTS on save
- Migration v023 rebuilds tasks_fts with searchable task_id column
- 6 new tests for prefix, slug, dedup, and relevance ordering
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Summary
Replaces the rigid FTS5 exact-word search with a multi-strategy approach that actually finds things:
distribnow finds "distribution documentation" (FTS5word*syntax instead of"word")2026-03-10-distributionfinds the task by ID substring. Task IDs are now indexed as searchable FTS columns (wereUNINDEXED)updated_at DESCAlso fixes two content-wipe bugs:
task_updatetitle rename calledupsert_task()withoutcontent=, nuking the FTS content indexreq.contentavailable but not passed throughChanges
nerve/db/tasks.py_build_fts_query(prefix), newsearch_tasks(multi-strategy), extracted_tokenize_query,_apply_status_filter,_apply_tag_filter,_row_matches_filtershelpersnerve/db/migrations/v023_tasks_fts_slug.pytasks_ftswithtask_idas searchable columnnerve/agent/tools.pynerve/gateway/routes/tasks.pytests/test_db.pytest_rebuild_ftsfor fallback behaviorTest plan