jif 21cfd369ef Add task context to shadow skill selection (#39008)
## Why

Short continuation prompts such as `continue` do not contain enough context for
skill selection on their own.

## What changed

- Add the `task_context_fusion_v1` shadow selector, combining the current request
  with up to two prior substantive requests and recently relevant skills.
- Record explicit skill intent and successful skill invocations for future turns,
  while excluding same-turn observations from predictions.
- Bound retained requests, augmented queries, and skill history, including safe
  truncation at UTF-8 character boundaries.

## Testing

Add unit and extension tests for continuation prompts, explicit intent, turn
isolation, cold thread state, bounded history, and unchanged control selectors.

GitOrigin-RevId: 72eca3f0d64620a0d24e95d5675f126ac982f8c7
2026-08-17 13:29:57 +00:00

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This repository is licensed under the Apache-2.0 License.

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