Agent IDE — Codex fork for AI-native development environment
675f165c56
## Summary This PR consolidates base_instructions onto SessionMeta / SessionConfiguration, so we ensure `base_instructions` is set once per session and should be (mostly) immutable, unless: - overridden by config on resume / fork - sub-agent tasks, like review or collab In a future PR, we should convert all references to `base_instructions` to consistently used the typed struct, so it's less likely that we put other strings there. See #9423. However, this PR is already quite complex, so I'm deferring that to a follow-up. ## Testing - [x] Added a resume test to assert that instructions are preserved. In particular, `resume_switches_models_preserves_base_instructions` fails against main. Existing test coverage thats assert base instructions are preserved across multiple requests in a session: - Manual compact keeps baseline instructions: core/tests/suite/compact.rs:199 - Auto-compact keeps baseline instructions: core/tests/suite/compact.rs:1142 - Prompt caching reuses the same instructions across two requests: core/tests/suite/prompt_caching.rs:150 and core/tests/suite/prompt_caching.rs:157 - Prompt caching with explicit expected string across two requests: core/tests/suite/prompt_caching.rs:213 and core/tests/suite/prompt_caching.rs:222 - Resume with model switch keeps original instructions: core/tests/suite/resume.rs:136 - Compact/resume/fork uses request 0 instructions for later expected payloads: core/tests/suite/compact_resume_fork.rs:215 |
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|---|---|---|
| .devcontainer | ||
| .github | ||
| .vscode | ||
| codex-cli | ||
| codex-rs | ||
| docs | ||
| patches | ||
| scripts | ||
| sdk/typescript | ||
| shell-tool-mcp | ||
| third_party/wezterm | ||
| .bazelignore | ||
| .bazelrc | ||
| .codespellignore | ||
| .codespellrc | ||
| .gitignore | ||
| .markdownlint-cli2.yaml | ||
| .npmrc | ||
| .prettierignore | ||
| .prettierrc.toml | ||
| AGENTS.md | ||
| announcement_tip.toml | ||
| BUILD.bazel | ||
| CHANGELOG.md | ||
| cliff.toml | ||
| defs.bzl | ||
| flake.lock | ||
| flake.nix | ||
| justfile | ||
| LICENSE | ||
| MODULE.bazel | ||
| MODULE.bazel.lock | ||
| NOTICE | ||
| package.json | ||
| pnpm-lock.yaml | ||
| pnpm-workspace.yaml | ||
| PNPM.md | ||
| rbe.bzl | ||
| README.md | ||
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.