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## What changed - Add optional `default` and `plan` collaboration-mode messages to model catalog metadata. - Prefer the active mode's catalog message, including an explicit empty value, while falling back to the existing developer instructions when the catalog variant is absent. - Track the model in collaboration-mode world state so mode and model changes append the appropriate instructions, and clear prior instructions when no current message exists. - Preserve catalog collaboration messages when instruction overrides remove other model instruction fields. ## Testing - Cover catalog deserialization, variant selection, fallback and empty-message behavior, legacy snapshot migration, mode changes, and model changes. GitOrigin-RevId: d4c6c0028423bc50b0e8175e55586f3e7bc1c3a8
codex-protocol
This crate defines the "types" for the protocol used by Codex CLI, which includes both "internal types" for communication between codex-core and codex-tui, as well as "external types" used with codex app-server.
This crate should have minimal dependencies.
Ideally, we should avoid "material business logic" in this crate, as we can always introduce Ext-style traits to add functionality to types in other crates.