## Summary Adds complete client-side image preparation behind the default-off `resize_all_images` feature flag. When enabled, local image producers defer decoding and resizing. Images are prepared centrally before insertion into conversation history, covering user input, `view_image`, and structured tool-output images. ## Behavior - Processes base64 `data:` images in messages and function/custom tool outputs. - Leaves non-data URLs, including HTTP(S) URLs, unchanged. - Applies image-detail budgets: - `high` and omitted: 2048px maximum dimension and 2.5K 32px patches. - `original`: 6000px maximum dimension and 10K 32px patches. - `auto`: uses the same 2048px / 2.5K-patch budget as high. - `low`: unsupported and replaced with an actionable placeholder. - Preserves original image bytes when no resize or format conversion is needed. - Enforces the shared 1 GiB encoded and decoded data-URL sanity limits. - Replaces only an image that fails preparation, preserving sibling content and tool-output metadata. - Uses bounded placeholders distinguishing generic processing failures, oversized images, and unsupported `low` detail. - Prepares resumed and forked history before installing it as live history without modifying persisted rollouts. ## Flag-Off Behavior When `resize_all_images` is disabled: - Existing local user-input and `view_image` processing remains unchanged. - Existing decoding and error behavior remains unchanged. - Arbitrary tool-output images are not processed. - HTTP(S) image URLs continue to be forwarded unchanged. #### [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.
