Files
codex/codex-rs
jif c983a53f20 Add character n-gram skill selection (#33613)
## What changed

- Add a character n-gram selector that scores matches across skill names, short descriptions, and descriptions using field weights and inverse document frequency.
- Include the selector in the shadow selection experiment alongside the existing lexical selectors.
- Bound query, document, candidate, and result processing, and report query or candidate truncation through the existing selection metadata.

## Testing

Add unit coverage for related word forms, typos, CJK text without word boundaries, and bounded inputs.

GitOrigin-RevId: 4df60cc661338050eeb7741c716bc1c9f730fedd
2026-07-16 14:38:36 +00:00
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