codex

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jif 3d7f9b4637 Fuse recent and lexical skills in shadow selection (#38204 )

## What changed

- Add the `lru_plus_lexical_v1` selector, combining the 50 most recent skills
  with weighted lexical matches through reciprocal rank fusion.
- Include the combined selector in the shadow-selection experiment and propagate
  query and candidate truncation metadata from both inputs.
- Generalize the existing reciprocal-rank fusion helper to accept a rank
  constant while preserving the existing lexical/character selector behavior.

## Testing

- Cover lexical-only selection, merging recent and matching skills, promotion
  from agreement between both rankings, and weak overlaps.
- Extend the skills extension test to verify invocation metrics for the new
  selector alongside `lru_v1`.

GitOrigin-RevId: 1b7b82bc97ea919c719cd05a009351b701019306

2026-08-12 15:17:54 +00:00

agent

Consolidate thread startup around StartThreadOptions (#34814 )

2026-07-22 19:31:54 +00:00

connectors

Instrument environment and plugin resolution paths (#33223 )

2026-07-15 03:27:16 +00:00

extension-api

Preserve foreign cwd URIs for turn-input contributors (#37342 )

2026-08-07 00:42:06 +00:00

git-attribution

Link Codex attribution in pull request bodies (#36963 )