Open Computer Use
iFurySt/open-codex-computer-use
Platform-neutral guidance for using Open Computer Use, the open-source Computer Use MCP server and CLI for macOS, Linux, and Windows.
Edits cmux settings, custom actions, workspace layouts, Dock controls and viewer options safely, keeping the user's config intact and validating changes first.
Install cmux Customization
$ npx skills add manaflow-ai/cmux --skill cmux-customization -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install manaflow-ai/cmux cmux-customization --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/cmux-customization .claude/skills/cmux-customization && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "cmux-customization" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-customization into .claude/skills/cmux-customization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-customization", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-customizationType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add manaflow-ai/cmux --skill cmux-customization -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install manaflow-ai/cmux cmux-customization --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/cmux-customization .agents/skills/cmux-customization && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cmux-customization" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-customization into .agents/skills/cmux-customization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-customization", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add manaflow-ai/cmux --skill cmux-customization -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install manaflow-ai/cmux cmux-customization --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/cmux-customization .cursor/skills/cmux-customization && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "cmux-customization" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-customization into .cursor/skills/cmux-customization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-customization", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/manaflow-ai/cmux.git --path skills/cmux-customization--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add manaflow-ai/cmux --skill cmux-customization -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install manaflow-ai/cmux cmux-customization --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/cmux-customization .gemini/skills/cmux-customization && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "cmux-customization" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-customization into .gemini/skills/cmux-customization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-customization", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install manaflow-ai/cmux cmux-customizationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add manaflow-ai/cmux --skill cmux-customization -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/cmux-customization .github/skills/cmux-customization && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "cmux-customization" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-customization into .github/skills/cmux-customization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-customization", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add manaflow-ai/cmux --skill cmux-customization -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install manaflow-ai/cmux cmux-customization --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/cmux-customization .opencode/skills/cmux-customization && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "cmux-customization" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-customization into .opencode/skills/cmux-customization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-customization", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
cmux-customization- GitHub stars
- 28k
- Token cost
- ~1.7k tokens
- SKILL.md length
- 702 words
- Files
- 4 (incl. references)
- Skills in repo
- 22
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Edits cmux settings, custom actions, workspace layouts, Dock controls and viewer options safely, keeping the user's config intact and validating changes first.
- Works in 7 steps: Inspect existing config. → Pick global or project-local scope.… → Back up the target file when it already… → …
- Adding a custom action or command to the cmux Command Palette
- SKILL.md covers Choose the right surface, Workflow, Example: Command Palette action and Validation, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
The first move is picking the right surface for a request: app preferences in the global cmux.json, custom actions, layouts, tab bar buttons, plus-button behavior and Command Palette entries in global or project-local cmux.json, Dock controls in dock.json, terminal rendering in the Ghostty config, and workspace names and colors through the cmux CLI. If Ghostty config can handle a request, the agent says so instead of inventing cmux settings.
Edits follow the schema, leave existing config intact and are validated before the agent reports completion. Project-local files let layouts and commands travel with a repo and override global entries with the same ID. Viewer settings for the browser, Markdown, file editor, file explorer and diff viewer live in the global file, with a viewer matrix and examples as references, and cmux import can bring fonts and colors over from iTerm2, Kitty, WezTerm and other terminals after a dry run.
When your agent uses it
- Adding a custom action or command to the cmux Command Palette
- Setting up a project-specific workspace layout in .cmux/cmux.json
- Configuring Dock panels for logs or test watchers
- Importing terminal settings from iTerm2 or Kitty
Example prompts
- “Add a cmux action that opens a split with the dev server and a test watcher.”
- “Move my fonts and colors from iTerm2 into cmux, and preview the import first.”
- “Put a git TUI in the right sidebar Dock for this project.”
Requirements
- cmux installed on macOS
Workflow steps
7 steps, taken from the first numbered list in SKILL.md.
- Inspect existing config.
- Pick global or project-local scope. Default to project-local for repo-specific commands, global for app preferences. Ask only when the…
- Back up the target file when it already exists (applicable path only, no backup for a missing file).
- For app settings and cmux-owned shortcuts, use the settings helper (~/.codex/skills/... if the user installed with skills.sh).
- For actions, UI wiring, workspace layouts, notification hooks, and Dock controls, edit the JSONC by hand and preserve unrelated sections…
- cmux reload-config.
- Verify the configured entrypoint exists: read back the shortcut binding, or confirm the action ID and where it should appear.
What it can do on your machine
Read from SKILL.md and the folder at commit f6532b1. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are bash and json).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
cmux Customization loads about 1.7k tokens when it runs, and up to ~4.5k if it reads all its reference files. Until then it costs about 111 tokens; SKILL.md has 702 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 702 words (~1,749 tokens).
“Keep the user's config intact, prefer schema-backed edits, and validate before reporting completion.”
- name
- cmux-customization
Files
SKILL.md and 3 other files (references) in skills/cmux-customization of manaflow-ai/cmux.
- SKILL.md
- agents/openai.yaml
- references/examples.md
- references/viewer-types.md
Open the folder on GitHubat commit f6532b1
Compare with similar skills
cmux Customization next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| cmux Customization this skillmanaflow-ai/cmux | 28k | — | ~1.7k | Automated safety check: Pass | Custom licence | |
| Open Computer UseiFurySt/open-codex-computer-use | 2.4k | — | ~1.5k | Automated safety check: Pass | MIT | |
| Mac Computer UseTo3akaRin/mac-computer-use | 1.1k | — | ~495 | Automated safety check: Pass | MIT | |
| Yichen Mac Wechat Dual Openmcncarl/yichen-skills | 4.4k | — | ~1.5k | Automated safety check: Pass | Custom licence | |
| Feishu BridgeAlexAnys/feishu-openclaw | 317 | 1 repos | ~615 | Automated safety check: Pass | None | |
| Shortcuts Generatordrewocarr/generate-shortcuts-skill | 218 | 1 repos | ~2k | Automated safety check: Notes | None |
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cmux Settings Editor
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Reads and changes cmux preferences in `~/.config/cmux/cmux.json` through a helper that validates each change before writing, covering terminal, browser, viewers and shortcuts.
cmux Backend Rules
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Cmux Debugging Guide
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Covers debug logging, the Debug menu, profiling rules and runtime pitfalls for working on the cmux macOS terminal app.
Ghostty Submodule and GhosttyKit Workflow
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Workflow rules for the Ghostty submodule in cmux: rebuilding GhosttyKit.xcframework, pushing fork changes and updating the parent submodule pointer safely.
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Runs the cmux release process: gathers per-PR changelog lines since the last tag, bumps the version, guards against a bad tag, then tags and pushes the macOS DMG release.
Related
Works with
Categories
Questions about cmux Customization
What does cmux Customization do?
Edits cmux settings, custom actions, workspace layouts, Dock controls and viewer options safely, keeping the user's config intact and validating changes first. json, terminal rendering in the Ghostty config, and workspace names and colors through the cmux CLI. If Ghostty config can handle a request, the agent says so instead of inventing cmux settings.
When should I use cmux Customization?
cmux Customization fits situations like: adding a custom action or command to the cmux Command Palette; setting up a project-specific workspace layout in .cmux/cmux.json; configuring Dock panels for logs or test watchers; importing terminal settings from iTerm2 or Kitty.
How do I install cmux Customization in Claude Code?
Run `npx skills add manaflow-ai/cmux --skill cmux-customization -a claude-code`. Or copy the skill folder (skills/cmux-customization in manaflow-ai/cmux) into .claude/skills/cmux-customization in your project. Claude Code loads it when a task matches its description.
How do I install cmux Customization in Codex?
Run `npx skills add manaflow-ai/cmux --skill cmux-customization -a codex`. Or copy the skill folder (skills/cmux-customization in manaflow-ai/cmux) into .agents/skills/cmux-customization in your project. Codex loads it when a task matches its description.
Can I use cmux Customization in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add manaflow-ai/cmux --skill cmux-customization -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cmux-customization, .gemini/skills/cmux-customization, .github/skills/cmux-customization and .opencode/skills/cmux-customization in your project.
What does cmux Customization need to run?
SKILL.md names no scripts, command-line tools or credentials: cmux Customization is instructions for the agent only. Our summary lists: cmux installed on macOS.
Does cmux Customization access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is cmux Customization safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does cmux Customization use?
cmux Customization has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does cmux Customization use?
About 1.7k tokens (SKILL.md is roughly 7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.7k tokens, read only when the agent opens those files.
What are the alternatives to cmux Customization?
Skills that share tags, products or a category with cmux Customization: Open Computer Use (iFurySt/open-codex-computer-use, 2.4k stars), Mac Computer Use (To3akaRin/mac-computer-use, 1.1k stars), Yichen Mac Wechat Dual Open (mcncarl/yichen-skills, 4.4k stars) and Feishu Bridge (AlexAnys/feishu-openclaw, 317 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains cmux Customization?
manaflow-ai (a GitHub organization) maintains it in manaflow-ai/cmux, which has 28,044 GitHub stars. The repository holds 22 skills in this directory. The repository was last updated on October 9, 2026.
Source: manaflow-ai/cmux on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.