## Why Tool families already disagree on what their existing `duration` fields mean, so lifecycle latency should live on the shared item envelope instead of being inferred from per-tool execution fields. Carrying that envelope through app-server notifications gives downstream consumers one reusable timing signal without pretending every tool has the same execution semantics. ## What changed - Adds `started_at_ms` to core `ItemStartedEvent` values and `completed_at_ms` to core `ItemCompletedEvent` values. - Populates those timestamps in the shared session lifecycle emitters, so protocol-native items get timing without each producer tracking its own clock state. - Exposes `startedAtMs` on app-server `item/started` notifications and `completedAtMs` on `item/completed` notifications. - Maps the lifecycle timestamps through the app-server boundary while leaving legacy-converted notifications nullable when no lifecycle timestamp exists. - Regenerates the app-server JSON schema and TypeScript fixtures for the notification-envelope change and updates downstream fixtures that construct those notifications directly. - Extends the existing web-search and image-generation integration flows to assert the new lifecycle timestamps on the native item events. ## Verification - `cargo check -p codex-protocol -p codex-core -p codex-app-server-protocol -p codex-app-server -p codex-tui -p codex-exec -p codex-app-server-client` - `cargo test -p codex-core --test all web_search_item_is_emitted` - `cargo test -p codex-core --test all image_generation_call_event_is_emitted` - `cargo test -p codex-app-server-protocol` --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/openai/codex/pull/20514). * #18748 * #18747 * #17090 * #17089 * __->__ #20514
npm i -g @openai/codex
or brew install --cask codex
Codex CLI is a coding agent from OpenAI that runs locally on your computer.
If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.
If you want the desktop app experience, run
codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.
Quickstart
Installing and running Codex CLI
Install globally with your preferred package manager:
# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex
Then simply run codex to get started.
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Business, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup.
Docs
This repository is licensed under the Apache-2.0 License.
