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## Summary - Remove `ghost_snapshot` / `GhostCommit` from the Responses API surface and generated SDK/schema artifacts. - Keep legacy config loading compatible, but make undo a no-op that reports the feature is unavailable. - Clean up core history, compaction, telemetry, rollout, and tests to stop carrying ghost snapshot items. ## Testing - Unit tests passed for `codex-protocol`, `codex-core` targeted undo and compaction flows, `codex-rollout`, and `codex-app-server-protocol`. - Regenerated config and app-server schemas plus Python SDK artifacts and verified they match the checked-in outputs.
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.