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Ahmed Ibrahim
ba4925b3c2
## Summary - snapshot `comp_hash` into `TurnContext` when the turn is created and use that snapshot as the downstream source of truth - persist the turn hash in rollout context and recover it into previous-turn settings during resume and fork replay - compact existing history with the previous model only when both adjacent turns provide hashes and the values differ - record `comp_hash_changed` as the compaction reason - cover ordinary transitions, resume, and missing-hash compatibility with end-to-end tests ## Why History produced under one compaction-compatible model configuration may not be safe to carry directly into another. Compacting at the turn boundary converts that history before context updates and the new user message are added. Persisting the turn snapshot in `TurnContextItem` makes the same protection work after resuming a rollout. A missing hash is not treated as evidence of incompatibility. `None → Some`, `Some → None`, and `None → None` do not trigger compaction; only `Some(previous) → Some(current)` with unequal values does. ## Stack - depends on #27532 - #27532 is based directly on `main` ## Testing - `just test -p codex-core pre_sampling_compact_` — 6 passed - `just test -p codex-core turn_context_item_uses_turn_context_comp_hash_snapshot` — passed - `just fix -p codex-core -p codex-protocol -p codex-analytics -p codex-models-manager`
ba4925b3c2
·
2026-06-11 04:11:26 +00:00
7,330 Commits
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.