## Why The token budget full-context fragment identifies the current context window, but not the thread that owns that window. Including the thread id makes the initial context-window metadata self-contained, and `get_context_remaining` also needs to be usable from Code Mode without forcing callers to parse the model-facing fragment string. ## What changed - Include the session thread id in the initial `<token_budget>` context fragment. - Expose `get_context_remaining` as a Code Mode nested tool while keeping `new_context` direct-model-only. - Keep direct model-facing `get_context_remaining` output as the existing `<token_budget>` text fragment. - Return only `tokens_left` from the Code Mode structured result for `get_context_remaining`. - Update token-budget integration tests and add Code Mode coverage for the structured result. ## Verification - `just test -p codex-core token_budget` - `just test -p codex-core code_mode_get_context_remaining_returns_structured_result` - `just test -p core_test_support redacted_text_mode_normalizes_uuids`
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.
