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.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ilysenko/codex-desktop-linux --skill agent-workspace-linuxgit 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/skills/ilysenko/codex-desktop-linux/agent-workspace-linux)<a href="https://agentmods.dev/skills/ilysenko/codex-desktop-linux/agent-workspace-linux"><img src="https://agentmods.dev/badge/skills/ilysenko/codex-desktop-linux/agent-workspace-linux/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/skills/ilysenko/codex-desktop-linux/agent-workspace-linux"><img src="https://agentmods.dev/badge/skills/ilysenko/codex-desktop-linux/agent-workspace-linux.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Agent Snooping · line 24 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
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 | $0.00070 | $0.01728 |
| Opus 5.5 | $0.00028 | $0.00691 |
| Sonnet 5.5 | $0.00014 | $0.00346 |
| Haiku 4.5 | $0.00007 | $0.00173 |
Grade B, and why
agent-workspace-linux scanned grade B with 1 finding 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 1mo 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
`~/.codex/config.toml` for normal Codex for Linux setup. Copies of this mod
2 near-identical copies found in the catalogue:
- agent-workspace-linux — 100% identical, 0 lines differ
- agent-workspace-linux — 86% identical, 15 lines differ
How it starts
The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.
agent-workspace-linux
Drive an isolated, agent-owned Linux desktop and workspace-owned browser through
the agent-workspace-linux MCP server. The workspace runs apps, browser
automation, screenshots, clipboard, and input inside its own hidden display,
never the user's real desktop, focus, or host Chrome.
This skill is the lightweight entry point. The MCP exposes many tools; do not load, list, or paste them all up front. Route by phase and ask the host to load only the tool schemas needed for the next action.
Critical Boundaries
Use the dedicated Codex for Linux feature page for setup
Codex for Linux owns Agent Workspace setup through the Agent Workspaces page:
binary path, page-authored permission rules, permission file mutation,
Reconnect/Smoke test, profile creation, workspace start/stop, and viewer launch.
Do not send users to generic MCP settings, general configuration pages, or
~/.codex/config.toml for normal Codex for Linux setup.
Skip unless: the host is Codex for Linux and the task is setup, permission changes, reconnect/restart, or the workspace tools are unavailable.
Keep tools progressive
The bundled installer is skill-first. ./install.sh installs this skill under
~/.codex/skills by default and leaves generic Codex MCP config untouched
unless the user explicitly chooses --codex-configure or --permissions.
For migration only, ./install.sh --clean-codex-config removes stale generic
Codex MCP entries left by older installs; restart or reconnect Codex afterward.
Skip unless: the user asks how to install/register the backend or why the tool family should not be loaded at startup.
Never target the host desktop
Use this skill only for the hidden workspace. For the user's real Linux desktop, real Chrome profile, existing tabs, or host focus/mouse/keyboard, use the appropriate host-desktop or browser tool instead.
Skip unless: the requested action can run inside the isolated workspace display or workspace-owned browser.
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.
- 1mo ago First seen · 153 lines · 70 tokens per session scan B d7667ac34c05
agent-workspace-linux is a skill published in the GitHub repository ilysenko/codex-desktop-linux (3,893 stars, last pushed yesterday), licensed MIT. It adds 70 tokens to every session and 1,728 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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