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## Why The app-server thread lifecycle API should no longer expose the full `PermissionProfile` value. After the permissions-profile migration, clients should round-trip only the active profile identity through `activePermissionProfile` and `permissions` when that identity is known. The full profile is server-side config. Treating a response-derived legacy sandbox projection as a new local profile can lose named-profile restrictions and accidentally widen permissions on the next turn. The legacy `sandbox` response field remains only as the compatibility/display fallback. ## What Changed - Removed `permissionProfile` from `ThreadStartResponse`, `ThreadResumeResponse`, and `ThreadForkResponse`. - Stopped populating that field in app-server thread start/resume/fork responses. - Updated embedded exec/TUI response mapping to derive display permission state from local config or the legacy sandbox fallback instead of a response profile value. - Added a TUI turn override shape that distinguishes preserving server permissions, selecting an active profile id, and sending a legacy sandbox for an explicit local override. - Preserved remote app-server permissions across turns by sending `permissions` only when an `activePermissionProfile` id is known, and otherwise sending no sandbox override unless the user selected a local override. - Kept embedded `thread/resume` hydration server-authored when `activePermissionProfile` is absent, which matches the live-thread attach path where the server ignores requested overrides. - Updated the app-server README to remove the obsolete lifecycle response `permissionProfile` reference. The remaining `permissionProfile` README references are request-side permission overrides. - Regenerated app-server JSON schema and TypeScript fixtures. - Kept the generated typed response enum exempt from `large_enum_variant`, matching the existing payload enum exemption after the lifecycle response variants shrank. ## How To Review Start with `codex-rs/app-server-protocol/src/protocol/v2/thread.rs` to confirm the response shape, then check the response construction in `codex-rs/app-server/src/request_processors`. The generated schema and TypeScript fixture changes are mechanical follow-through from the protocol removal. The TUI behavior is the delicate part: review `codex-rs/tui/src/app_server_session.rs` for response hydration and turn-start override projection, then `codex-rs/tui/src/app/thread_routing.rs` for the decision about whether the next turn should preserve the server snapshot, send an active profile id, or send a legacy sandbox for an explicit local override. ## Verification - `just write-app-server-schema` - `cargo test -p codex-app-server-protocol thread_lifecycle_responses_default_missing_optional_fields` - `cargo test -p codex-exec session_configured_from_thread_response_uses_permission_profile_from_config` - `cargo test -p codex-tui --lib thread_response` - `cargo test -p codex-tui turn_permissions_` - `cargo test -p codex-tui resume_response_restores_turns_from_thread_items` - `cargo test -p codex-analytics track_response_only_enqueues_analytics_relevant_responses` - `just fix -p codex-analytics` - `just fix -p codex-app-server-protocol` - `just fix -p codex-tui` - `just argument-comment-lint` --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/openai/codex/pull/22792). * #22795 * __->__ #22792