## Summary - make `formatted_truncate_text` prepend `Warning: truncated output (original token count: N)` above the existing `Total output lines` header - update direct formatter, unified-exec, user-shell, and code-mode expectations - add core unit coverage that runs in Bazel without requiring the skipped V8-backed code-mode integration suite ## Validation - `cargo test -p codex-utils-output-truncation -- --nocapture` (17 passed) - `cargo test -p codex-core --lib truncated_text_output_starts_with_warning -- --nocapture` - `cargo test -p codex-core --test all clamps_model_requested_max_output_tokens_to_policy -- --nocapture` (2 passed) - `cargo test -p codex-core --test all unified_exec_formats_large_output_summary -- --nocapture` - `cargo test -p codex-core --test all user_shell_command_output_is_truncated_in_history -- --nocapture` - Bazel CI exercises the shared formatter and downstream integration expectations
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
Run the following on Mac or Linux to install Codex CLI:
curl -fsSL https://chatgpt.com/codex/install.sh | sh
Run the following on Windows to install Codex CLI:
powershell -ExecutionPolicy ByPass -c "irm https://chatgpt.com/codex/install.ps1 | iex"
Codex CLI can also be installed via the following package managers:
# 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.
