Michael Bolin
22f12568e1
## Why Token-budget reminder and guidance messages can require more than 1,000 bytes to provide useful model-facing instructions. At the same time, these strings are injected into model-visible context, so their size must remain tightly bounded in response to the P0 context-growth concern. A 2,000-byte runtime cap provides additional room without allowing the substantially larger context growth of a 4 KiB limit. ## What changed - raises the runtime byte limits for token-budget reminder templates and guidance messages from 1,000 to 2,000 - raises the corresponding JSON Schema `maxLength` values to 2,000 - regenerates `codex-rs/core/config.schema.json` ## Testing - `just test -p codex-features` - `just test -p codex-core load_config_resolves_token_budget_config load_config_rejects_invalid_token_budget_reminder_template` The full `codex-core` test run completed 2,858 tests successfully and encountered seven unrelated environment-sensitive failures involving Seatbelt/network environment assertions, MCP capability setup, and abort timing.
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.