Use Guardian model limits for review sessions - #34847
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## Why Parent context-window and auto-compaction overrides may describe a different model than the one selected for Guardian review. ## What changed - Clear `model_context_window` and `model_auto_compact_token_limit` when the effective Guardian model differs from the parent model, allowing the review model's own limits to apply. - Preserve those overrides when Guardian uses the same effective model. ## Testing Add unit coverage for both model-selection paths and verify that a Guardian rollout records the selected review model's context window. GitOrigin-RevId: ebc399f4eba37c7f279fd0d258154c00d45e2d00
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Use Guardian model limits for review sessions
Why
Parent context-window and auto-compaction overrides may describe a different
model than the one selected for Guardian review.
What changed
model_context_windowandmodel_auto_compact_token_limitwhen theeffective Guardian model differs from the parent model, allowing the review
model's own limits to apply.
Testing
Add unit coverage for both model-selection paths and verify that a Guardian
rollout records the selected review model's context window.