rhan-oai
e2eea07140
Refresh collaboration instructions when their content changes ( #39163 )
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## Why
Collaboration guidance can change without changing the active mode or model, such as after a model catalog refresh. Tracking only the mode and model leaves the earlier guidance in retained history.
## What changed
- Include a hash of the rendered collaboration instructions in the world-state snapshot so changed guidance is appended to retained history once.
- Emit one empty collaboration fragment when guidance is removed, preventing stale instructions from remaining active without repeatedly clearing them.
- Refresh legacy snapshots that lack an instruction hash once on resume.
## Testing
Cover same-mode catalog updates, clearing missing or explicitly empty guidance, retained-history behavior, and cold resume from legacy snapshots.
GitOrigin-RevId: 69f690adeccd1fb9794a6b15647e6efae3fec4f6
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