codex-desktop is an unofficial, community-maintained Linux distribution of OpenAI’s ChatGPT desktop application, packaged for several Linux formats and desktop environments. Linux users install it to access Chat, Work, and Codex through a desktop app built from the signed upstream Linux payload. Its catalogue skills, agents, instructions, and MCP integration extend workflows around the application.
Borrowing it
Nothing to install: this file belongs to ilysenko/codex-desktop-linux. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ilysenko/codex-desktop-linux/main/AGENTS.mdgit clone --depth 1 https://github.com/ilysenko/codex-desktop-linuxWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/ilysenko/codex-desktop-linux/agents-md)<a href="https://agentmods.dev/instructions/ilysenko/codex-desktop-linux/agents-md"><img src="https://agentmods.dev/badge/instructions/ilysenko/codex-desktop-linux/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/ilysenko/codex-desktop-linux/agents-md"><img src="https://agentmods.dev/badge/instructions/ilysenko/codex-desktop-linux/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01667 | $0.01667 |
| Opus 5.5 | $0.00667 | $0.00667 |
| Sonnet 5.5 | $0.00333 | $0.00333 |
| Haiku 4.5 | $0.00167 | $0.00167 |
Grade A, and why
codex-desktop-linux AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 25d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Purpose
This repository repackages OpenAI's signed official Linux chatgpt package as
the independently named codex-desktop distribution. It preserves the
official ELF/Electron payload and bundled tools, adds disabled-by-default Linux
features, builds deb/RPM/pacman/AppImage/Nix outputs, and ships a Rust update
manager that rebuilds from the signed stable APT repository.
Non-negotiable rules
- Support only the latest signed stable OpenAI Linux package on
amd64andarm64. Remove obsolete drift paths in the same change. - Trust
InReleasethrough the pinned repository key, then verifyPackagesand package SHA-256 values.latestURLs are never a trust root. - Never execute upstream maintainer scripts. Extract the data payload only.
- A clean build with no enabled ASAR feature and no required core patch must
preserve
resources/app.asarbyte-for-byte. - Keep the output identity
codex-desktopunder/opt/codex-desktop; do not install the upstream APT source, key, package identity, or maintainer scripts. - Keep the user-facing desktop name ChatGPT Community and its distinct
community icon;
ChatGPTwithout the qualifier identifies the upstream app. - The core patch registry contains only reproduced launch/work blockers with required regression tests; otherwise it stays empty.
- Experimental or workflow-specific behavior belongs in
linux-features/and remains disabled in committed configuration. - Known retired feature IDs are ignored; arbitrary unknown IDs remain errors.
- Do not edit generated output (
codex-app/,dist/, candidates,target/).
Source routing
- Upstream verification/extraction:
scripts/lib/upstream-linux-package.jsandscripts/lib/upstream-linux-package.sh. - Build orchestration:
install.sh,scripts/lib/*.sh. - Launcher:
launcher/start.sh.template. - Feature descriptors/resources/hooks:
linux-features/<id>/. - ASAR engine/reporting:
scripts/patches/,scripts/patch-linux-window-ui.js,scripts/lib/patch-report.js. - Packaging:
scripts/build-*.sh,scripts/lib/package-common.sh,packaging/. - Updater:
updater/src/; minimal rebuild payload:packaging/update-builder/. - Signed-release automation:
scripts/automation/upstream-linux-package-watchdog/. - Nix:
flake.nix,nix/upstream-linux-packages.json,nix/*.nix.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 25d ago Changed · +17 lines · +220 tokens per session 26b2289119ca
- 1mo ago Changed · +3 tokens per session 9a1a0b296336
- 1mo ago First seen · 141 lines · 1,444 tokens per session scan A b1d42c73f92a
codex-desktop-linux AGENTS.md is an instructions file published in the GitHub repository ilysenko/codex-desktop-linux (3,917 stars, last pushed today), licensed MIT. It adds 1,667 tokens to every session, about $0.0067 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
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Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.