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## Why `item/fileChange/outputDelta` text output was only the tool's summary or error text and not used by client surfaces. We keep `item/fileChange/outputDelta` in the app-server protocol as a deprecated compatibility entry, but the server no longer emits it. ## What changed - stop the `apply_patch` runtime from emitting `ExecCommandOutputDelta` events - simplify `item_event_to_server_notification` so command output deltas always map to `item/commandExecution/outputDelta` - remove the app-server bookkeeping that tried to detect whether an output delta belonged to a file change - mark `item/fileChange/outputDelta` as a deprecated legacy protocol entry in the v2 types, schema, and README - simplify the file-change approval tests so they only wait for completion instead of expecting output-delta notifications ## Testing - `cargo test -p codex-app-server-protocol` - `cargo test -p codex-thread-manager-sample` - `cargo test -p codex-app-server-protocol protocol::event_mapping::tests::exec_command_output_delta_maps_to_command_execution_output_delta -- --exact` - `cargo test -p codex-app-server turn_start_file_change_approval_accept_for_session_persists_v2 -- --exact` *(failed before the test assertions because the wiremock `/responses` mock received 0 requests in setup)*
ThreadManager Sample
Small one-shot binary that starts a Codex thread with ThreadManager from
codex-core-api, submits a single user turn, and prints the final assistant
message.
cargo run -p codex-thread-manager-sample -- "Say hello"
Use --model to override the configured default model:
cargo run -p codex-thread-manager-sample -- --model gpt-5.2 "Say hello"
The prompt can also be piped through stdin:
printf 'Say hello\n' | cargo run -p codex-thread-manager-sample