Agent IDE — Codex fork for AI-native development environment
efc8d45750
This PR adds an experimental `persist_extended_history` bool flag to app-server thread APIs so rollout logs can retain a richer set of EventMsgs for non-lossy Thread > Turn > ThreadItems reconstruction (i.e. on `thread/resume`). ### Motivation Today, our rollout recorder only persists a small subset (e.g. user message, reasoning, assistant message) of `EventMsg` types, dropping a good number (like command exec, file change, etc.) that are important for reconstructing full item history for `thread/resume`, `thread/read`, and `thread/fork`. Some clients want to be able to resume a thread without lossiness. This lossiness is primarily a UI thing, since what the model sees are `ResponseItem` and not `EventMsg`. ### Approach This change introduces an opt-in `persist_full_history` flag to preserve those events when you start/resume/fork a thread (defaults to `false`). This is done by adding an `EventPersistenceMode` to the rollout recorder: - `Limited` (existing behavior, default) - `Extended` (new opt-in behavior) In `Extended` mode, persist additional `EventMsg` variants needed for non-lossy app-server `ThreadItem` reconstruction. We now store the following ThreadItems that we didn't before: - web search - command execution - patch/file changes - MCP tool calls - image view calls - collab tool outcomes - context compaction - review mode enter/exit For **command executions** in particular, we truncate the output using the existing `truncate_text` from core to store an upper bound of 10,000 bytes, which is also the default value for truncating tool outputs shown to the model. This keeps the size of the rollout file and command execution items returned over the wire reasonable. And we also persist `EventMsg::Error` which we can now map back to the Turn's status and populates the Turn's error metadata. #### Updates to EventMsgs To truly make `thread/resume` non-lossy, we also needed to persist the `status` on `EventMsg::CommandExecutionEndEvent` and `EventMsg::PatchApplyEndEvent`. Previously it was not obvious whether a command failed or was declined (similar for apply_patch). These EventMsgs were never persisted before so I made it a required field. |
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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 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, Team, 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.