## Why Message history was implemented inside `codex-core` and surfaced through core protocol ops and `SessionConfiguredEvent` fields even though the current consumer is TUI-local prompt recall. That made core own UI history persistence and exposed `history_log_id` / `history_entry_count` through surfaces that app-server and other clients do not need. This change moves message history persistence out of core and keeps the recall plumbing local to the TUI. ## What changed - Added a new `codex-message-history` crate for appending, looking up, trimming, and reading metadata from `history.jsonl`. - Removed core protocol history ops/events: `AddToHistory`, `GetHistoryEntryRequest`, and `GetHistoryEntryResponse`. - Removed `history_log_id` and `history_entry_count` from `SessionConfiguredEvent` and updated exec/MCP/test fixtures accordingly. - Updated the TUI to dispatch local app events for message-history append/lookup and keep its persistent-history metadata in TUI session state. ## Validation - `cargo test -p codex-message-history -p codex-protocol` - `cargo test -p codex-exec event_processor_with_json_output` - `cargo test -p codex-mcp-server outgoing_message` - `cargo test -p codex-tui` - `just fix -p codex-message-history -p codex-protocol -p codex-core -p codex-tui -p codex-exec -p codex-mcp-server`
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.
