---
title: Codex bundles LibreOffice
link: https://simonwillison.net/2026/Sep/1/codex-libreoffice/
source: simonwillison-net
published: 2026-09-01T19:03:01Z
updated: 2026-09-01T19:03:01Z
first_seen: 2026-09-04T12:14:41.802665207Z
labels:
- ai
- codex
- generative-ai
- llms
- open-source
- openai
- openoffice
summary: 'I was poking around in my ~/.cache/ folder using OmniDiskSweeper when I spotted something interesting. The OpenAI Codex desktop app (since rebranded to just ChatGPT) has 1.7GB of stuff in there in a folder called codex-primary-runtime, including a full Python installation, a full Node.js installation, and native binaries for Poppler, git, and the LibreOffice open source office suite (which forked from OpenOffice.org in 2010): The ~/.cache/codex-runtimes/codex-primary-runtime/plugins/openai-primary-runtime/plugins/documents folder includes skills which tell Codex how to find and use those binaries. Tags: codex, generative-ai, openai, ai, llms, openoffice, open-source'
content: extracted
html: 2026-09-01-codex-bundles-libreoffice.html
images:
- source: https://static.simonwillison.net/static/2026/codex-primay-runtime.webp
  original:
    file: 2026-09-01-codex-bundles-libreoffice.image-d1ca3ff58c36.webp
    width: 2210
    height: 348
  variants:
  - file: 2026-09-01-codex-bundles-libreoffice.image-c5283fcdaf17.webp
    width: 320
    height: 50
  - file: 2026-09-01-codex-bundles-libreoffice.image-addc374c8148.webp
    width: 640
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  color: '#fbfbfb'
---

I was poking around in my `~/.cache/` folder using [OmniDiskSweeper](https://www.omnigroup.com/more) when I spotted something interesting. The OpenAI Codex desktop app (since [rebranded](https://help.openai.com/en/articles/20001276-moving-to-the-new-chatgpt-desktop-app) to just ChatGPT) has 1.7GB of stuff in there in a folder called `codex-primary-runtime`, including a full Python installation, a full Node.js installation, and native binaries for [Poppler](https://poppler.freedesktop.org), git, and the [LibreOffice](https://en.wikipedia.org/wiki/LibreOffice) open source office suite (which forked from OpenOffice.org in 2010):

![Screenshot of a macOS disk usage app window in column view, titled \"/Users/simon/.cache - 442.1 GB\". First column: 356.8 GB huggingface, 82.5 GB uv, 1.7 GB codex-runtimes (selected), 609.0 MB datasette-sqlite, 298.8 MB rod. Second column: 1.7 GB codex-primary-runtime (selected). Third column: 1.7 GB dependencies (selected), 6.3 MB plugins, 4.1 kB runtime.json. Fourth column: 771.0 MB native (selected), 446.4 MB node, 440.6 MB python, 28.7 kB bin. Fifth column: 429.7 MB libreoffice-headless (selected), 187.9 MB poppler, 148.1 MB git, 4.7 MB libheif, 679.9 kB jxrlib.](https://static.simonwillison.net/static/2026/codex-primay-runtime.webp)

The `~/.cache/codex-runtimes/codex-primary-runtime/plugins/openai-primary-runtime/plugins/documents` folder includes skills which tell Codex how to find and use those binaries.