## Summary Add shared image-processing primitives needed for centralized image preparation in a follow-up PR. - Add `load_data_url_for_prompt` for decoding and preparing base64 image data URLs. - Add configurable maximum-dimension and 32px patch-budget resizing. - Enforce a 1 GiB sanity limit on both encoded and decoded data-URL representations. - Preserve original PNG, JPEG, and WebP bytes when resizing is unnecessary. - Preserve the existing GIF-to-PNG behavior. - Move image utility tests into the existing sidecar test module. ## Behavior This PR is intended to be runtime behavior-preserving. Existing production callers continue using `PromptImageMode::ResizeToFit` and `PromptImageMode::Original` with their existing semantics. The new data-URL entrypoint and configurable resize mode have no production callers in this PR; they are used by the next PR in the stack. This PR does not change user-input handling, `view_image`, history insertion, request construction, HTTP image URL forwarding, or app-server behavior. #### [git stack](https://github.com/magus/git-stack-cli) - 👉 `1` https://github.com/openai/codex/pull/27245 - ⏳ `2` https://github.com/openai/codex/pull/27247 - ⏳ `3` https://github.com/openai/codex/pull/27246 - ⏳ `4` https://github.com/openai/codex/pull/27266
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.
