Penpot Uiux Design
github/awesome-copilot
Comprehensive guide for creating professional UI/UX designs in Penpot using MCP tools.
Control a local iOS simulator or Android device with Mobile Dev's bundled agent-device MCP tools.
Install Agent Device
$ npx skills add callstackincubator/codex-mobile-dev-plugin --skill agent-device -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install callstackincubator/codex-mobile-dev-plugin agent-device --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/callstackincubator/codex-mobile-dev-plugin.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/agent-device .claude/skills/agent-device && 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 "agent-device" agent skill from https://github.com/callstackincubator/codex-mobile-dev-plugin/tree/main/skills/agent-device into .claude/skills/agent-device/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-device", 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/callstackincubator/codex-mobile-dev-plugin/tree/main/skills/agent-deviceType 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 callstackincubator/codex-mobile-dev-plugin --skill agent-device -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install callstackincubator/codex-mobile-dev-plugin agent-device --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/callstackincubator/codex-mobile-dev-plugin.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/agent-device .agents/skills/agent-device && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "agent-device" agent skill from https://github.com/callstackincubator/codex-mobile-dev-plugin/tree/main/skills/agent-device into .agents/skills/agent-device/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-device", 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 callstackincubator/codex-mobile-dev-plugin --skill agent-device -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install callstackincubator/codex-mobile-dev-plugin agent-device --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/callstackincubator/codex-mobile-dev-plugin.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/agent-device .cursor/skills/agent-device && 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 "agent-device" agent skill from https://github.com/callstackincubator/codex-mobile-dev-plugin/tree/main/skills/agent-device into .cursor/skills/agent-device/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-device", 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/callstackincubator/codex-mobile-dev-plugin.git --path skills/agent-device--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 callstackincubator/codex-mobile-dev-plugin --skill agent-device -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install callstackincubator/codex-mobile-dev-plugin agent-device --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/callstackincubator/codex-mobile-dev-plugin.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/agent-device .gemini/skills/agent-device && 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 "agent-device" agent skill from https://github.com/callstackincubator/codex-mobile-dev-plugin/tree/main/skills/agent-device into .gemini/skills/agent-device/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-device", 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 callstackincubator/codex-mobile-dev-plugin agent-deviceInstalls 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 callstackincubator/codex-mobile-dev-plugin --skill agent-device -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/callstackincubator/codex-mobile-dev-plugin.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/agent-device .github/skills/agent-device && 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 "agent-device" agent skill from https://github.com/callstackincubator/codex-mobile-dev-plugin/tree/main/skills/agent-device into .github/skills/agent-device/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-device", 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 callstackincubator/codex-mobile-dev-plugin --skill agent-device -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install callstackincubator/codex-mobile-dev-plugin agent-device --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/callstackincubator/codex-mobile-dev-plugin.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/agent-device .opencode/skills/agent-device && 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 "agent-device" agent skill from https://github.com/callstackincubator/codex-mobile-dev-plugin/tree/main/skills/agent-device into .opencode/skills/agent-device/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agent-device", 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
agent-device- GitHub stars
- 138
- Token cost
- ~1.2k tokens
- SKILL.md length
- 692 words
- Files
- 3 (incl. references)
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- None found
At a glance
Control a local iOS simulator or Android device with Mobile Dev's bundled agent-device MCP tools.
- Works in 5 steps: Use the chosen device's UDID from Mobile… → Read the interactive refs returned by… → Call press, fill, or scroll with settle:… → …
- Accessibility snapshots
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Tasks that involve MCP servers
What it does
Agent Device is an agent skill from callstackincubator/codex-mobile-dev-plugin, published by the product's own GitHub organization. Control a local iOS simulator or Android device with Mobile Dev's bundled agent-device MCP tools. Use for opening apps, accessibility snapshots, element refs, taps, text entry, scrolling, waits, and app debugging.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `agents/openai.yaml` and `references/workflow.md`).
It sits in Frontend & Design, covering MCP servers. It works with iOS and Android. The repository describes itself as: A Codex plugin for a better mobile development experience for android and iOS.
When your agent uses it
- Accessibility snapshots
- Tasks that involve MCP servers
Example prompts
- “/agent-device”
Requirements
- Node.js
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Use the chosen device's UDID from Mobile Dev or its device-list tools. If the task names an app, call open with that app, platform: "ios"…
- Read the interactive refs returned by open, or call snapshot with interactiveOnly: true. press and fill take a target object. Use {…
- Call press, fill, or scroll with settle: true. Continue from the returned diff and refs. Refresh the snapshot when the result lacks the…
- Verify the requested result with a named expectation through wait, is, get, or find. An accepted input does not prove that the app changed.
- Use close when finished. Leave shutdown unset to keep the simulator running. Closing can close the active app; omit this step if the user…
What it can do on your machine
Read from SKILL.md and the folder at commit 85c112d. 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.
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
Agent Device loads about 1.2k tokens when it runs, and up to ~3.4k if it reads all its reference files. Until then it costs about 57 tokens; SKILL.md has 692 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 692 words (~1,176 tokens).
“This plugin includes agent-device 0.20.9, its official MCP server, dependencies, and Apple runner source. The plugin exposes its operations through compact MCP schemas. Use the plugin's agent-device MCP tools. No global CLI install, npx download, or separate server is needed…”
- name
- agent-device
Files
SKILL.md and 2 other files (references) in skills/agent-device of callstackincubator/codex-mobile-dev-plugin.
- SKILL.md
- agents/openai.yaml
- references/workflow.md
Open the folder on GitHubat commit 85c112d
Compare with similar skills
Agent Device 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 |
|---|---|---|---|---|---|---|
| Agent Device this skillcallstackincubator/codex-mobile-dev-plugin | 138 | — | ~1.2k | Automated safety check: Pass | None | |
| Penpot Uiux Designgithub/awesome-copilot | 40k | 1 repos | ~3k | Automated safety check: Pass | MIT | |
| Argent Device Interactbbplayer-app/BBPlayer | 1.1k | — | ~6k | Automated safety check: Warn | MIT | |
| Argent Test UI Flowbbplayer-app/BBPlayer | 1.1k | — | ~2.7k | Automated safety check: Notes | MIT | |
| AccessibilityGetStream/stream-chat-react-native | 1.2k | — | ~6.5k | Automated safety check: Pass | Custom licence | |
| Argent Metro Debuggerbbplayer-app/BBPlayer | 1.1k | — | ~3.4k | Automated safety check: Pass | MIT |
Similar skills
- Official
Argent Device Interact
bbplayer-app/BBPlayer
Interact with an iOS simulator, Android emulator, or Chromium (CDP) app using argent MCP tools.
Argent Test UI Flow
bbplayer-app/BBPlayer
Autonomously test an app UI (iOS or Android) by running interact-screenshot-verify loops using argent MCP tools.
Accessibility
GetStream/stream-chat-react-native
Maintain VoiceOver/TalkBack-focused accessibility in stream-chat-react-native.
Argent Metro Debugger
bbplayer-app/BBPlayer
Debug a JS runtime via CDP using argent debugger tools. An agent skill from bbplayer-app/BBPlayer.
Solomd
zhitongblog/solomd
Read, search, edit, and version-control any folder of Markdown notes via the SoloMD MCP server.
More from callstackincubator/codex-mobile-dev-plugin
- Official
Build Codex Native Plugins
callstackincubator/codex-mobile-dev-plugin
Create, extend, package, and troubleshoot Codex and ChatGPT plugins using OpenAI MCP Extensions.
- Official
Mobile Dev
callstackincubator/codex-mobile-dev-plugin
A skill your agent uses when building, running, changing, or debugging local iOS, Android, Expo, React Native, or SwiftUI apps.
- Official
Mobile Dev Setup
callstackincubator/codex-mobile-dev-plugin
Set up the Mobile Dev plugin's bundled iOS and Android backends and check local device tools.
Related
Categories
Questions about Agent Device
What does Agent Device do?
Control a local iOS simulator or Android device with Mobile Dev's bundled agent-device MCP tools. Agent Device is an agent skill from callstackincubator/codex-mobile-dev-plugin, published by the product's own GitHub organization. Control a local iOS simulator or Android device with Mobile Dev's bundled agent-device MCP tools.
When should I use Agent Device?
Agent Device fits situations like: accessibility snapshots; tasks that involve MCP servers.
How do I install Agent Device in Claude Code?
Run `npx skills add callstackincubator/codex-mobile-dev-plugin --skill agent-device -a claude-code`. Or copy the skill folder (skills/agent-device in callstackincubator/codex-mobile-dev-plugin) into .claude/skills/agent-device in your project. Claude Code loads it when a task matches its description.
How do I install Agent Device in Codex?
Run `npx skills add callstackincubator/codex-mobile-dev-plugin --skill agent-device -a codex`. Or copy the skill folder (skills/agent-device in callstackincubator/codex-mobile-dev-plugin) into .agents/skills/agent-device in your project. Codex loads it when a task matches its description.
Can I use Agent Device 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 callstackincubator/codex-mobile-dev-plugin --skill agent-device -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/agent-device, .gemini/skills/agent-device, .github/skills/agent-device and .opencode/skills/agent-device in your project.
What does Agent Device need to run?
SKILL.md names no scripts, command-line tools or credentials: Agent Device is instructions for the agent only. Our summary lists: Node.js.
Does Agent Device 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 Agent Device 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 Agent Device use?
No licence was found for Agent Device or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Agent Device use?
About 1.2k tokens (SKILL.md is roughly 4.7k 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 2.2k tokens, read only when the agent opens those files.
What are the alternatives to Agent Device?
Skills that share tags, products or a category with Agent Device: Penpot Uiux Design (github/awesome-copilot, 40k stars), Argent Device Interact (bbplayer-app/BBPlayer, 1.1k stars), Argent Test UI Flow (bbplayer-app/BBPlayer, 1.1k stars) and Accessibility (GetStream/stream-chat-react-native, 1.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Agent Device?
callstackincubator (a GitHub organization, an official publisher) maintains it in callstackincubator/codex-mobile-dev-plugin, which has 138 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 7, 2026.
Source: callstackincubator/codex-mobile-dev-plugin on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.