fix(ranking): replace 60% prefix stem with 4-char + half-length stems#58
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expandTokens was generating 'authenti' (60% of 'authentication') instead of 'auth', causing pack to return 0 items for long English query words. Replace the single 60% stem with two fixed-length stems: - 4-char stem: catches root prefixes (auth, conf, init, user) - half-length stem: floor(len * 0.5) catches mid-length matches e.g. 'config' (6) from 'configuration' (13) Add 8 new unit tests covering prefix stemming, camelCase expansion, no-over-match guard, and cross-file ranking without knowledge atoms. Also includes adapter parity fixes from this session: - windsurf, gemini: add agentSkillFiles (skill file parity with copilot/cursor/cline) - gemini: switch from bulletWorkflow to numberedWorkflow - claude-code: Stop hook runs kgraph stale then session end --conclude - pack: warn when needs-review/stale atoms served in context (P1) - pack: warn when maps are behind HEAD (P4) - tests: integration-registry and integrate tests updated for new adapter behaviour 233/233 tests passing.
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expandTokens was generating 'authenti' (60% of 'authentication') instead of 'auth', causing pack to return 0 items for long English query words.
Replace the single 60% stem with two fixed-length stems:
Add 8 new unit tests covering prefix stemming, camelCase expansion, no-over-match guard, and cross-file ranking without knowledge atoms.
Also includes adapter parity fixes from this session:
233/233 tests passing.