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Support model catalog Apps usage instructions (#61213)

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## What changed

- Add the disabled-by-default `catalog_apps_instructions` feature to use the selected model's `model_messages.apps.usage_instructions`, subject to existing Apps availability and model gates.
- Preserve valid catalog text literally, allow an empty string to clear guidance, and fall back to bundled instructions for missing, whitespace-only, or oversized values. Overrides are limited to 800 UTF-8 bytes.
- Reconcile guidance with the latest retained Apps fragment, emitting replacement or removal notices when needed and avoiding repeated updates across resumes. Preserve compatibility with bundled guidance and legacy checkpoints.
- Recognize catalog Apps fragments as contextual developer messages in event mapping and rollout rollback.

## Testing

Add resolver, world-state, client, and scenario coverage for literal text and byte limits, feature and availability gates, model switches, clearing guidance, resumes, and legacy history recovery.

GitOrigin-RevId: 6240d407ada8f22fa101753ff3ddb338632ae283
This commit is contained in:
goodman-oai
2026-11-13 00:29:24 +00:00
committed by copyberry
parent 6c7ecc322f
commit 83a23c0936
24 changed files with 1613 additions and 156 deletions
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codex-rs/protocol/src/protocol.rs
+2
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@@ -134,6 +134,8 @@ pub const ENVIRONMENTS_INSTRUCTIONS_OPEN_TAG: &str = "<environments_instructions
pub const ENVIRONMENTS_INSTRUCTIONS_CLOSE_TAG: &str = "</environments_instructions>";
pub const APPS_INSTRUCTIONS_OPEN_TAG: &str = "<apps_instructions>";
pub const APPS_INSTRUCTIONS_CLOSE_TAG: &str = "</apps_instructions>";
pub const CATALOG_APPS_INSTRUCTIONS_OPEN_TAG: &str = "<catalog_apps_instructions>";
pub const CATALOG_APPS_INSTRUCTIONS_CLOSE_TAG: &str = "</catalog_apps_instructions>";
pub const SKILLS_INSTRUCTIONS_OPEN_TAG: &str = "<skills_instructions>";
pub const SKILLS_INSTRUCTIONS_CLOSE_TAG: &str = "</skills_instructions>";
pub const PLUGINS_INSTRUCTIONS_OPEN_TAG: &str = "<plugins_instructions>";