Files
codex/codex-rs/ext
jif 4dcce4f0c4 Reject token-budget history notes for unsupported starting models (#44883)
## What changed

After resolving startup configuration and model defaults, reject `features.token_budget.use_history_notes_extension` when the starting model lacks `supports_experimental_context`. Return an error directing users to disable the option or select a compatible model.

## Testing

Add startup coverage for explicit configuration and model defaults, verifying rejection for unsupported models and successful activation for supported models and standalone token budgets. Update history-notes test fixtures to declare experimental context support.

GitOrigin-RevId: abf1a024efc5acf97cfc858fbb93821363769dc0
2026-09-11 17:55:03 +00:00
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