Mobile Apps Kit

A setup for building Flutter, iOS, Android and React Native apps: platform conventions, simulator testing, and an app-store readiness checklist before you ship.

A setup for AI coding agents, made by Kitloom. One source, generated for every major agent: Claude Code, OpenAI Codex, Cursor, Google Antigravity, Gemini CLI, GitHub Copilot, Windsurf (Devin), opencode and Aider.

Install

1. Download this repository as a ZIP, or use the Check and download button on its Kitloom page, which checks it first.
2. Read the files. Nothing here runs on its own: the kit has no hooks and no install scripts.
3. Copy the folders and files you want into the root of your project. AGENTS.md is the shared instructions file; edit it to fit your project.

What is inside

Skills

• ios-simulator-skill — Build, launch and drive the iOS Simulator, navigate the UI and run accessibility checks when verifying an iOS change.
• react-native — Writing or reviewing React Native and Expo code: lists, Reanimated, navigation and platform-specific code.
• flutter-best-practices — Writing, reviewing or refactoring Flutter and Dart code, project structure and widgets.
• flutter-app-architecture — Scaffolding a Flutter project or splitting it into view models, repositories and dependency injection.
• testing — Writing or fixing Flutter unit, widget and golden tests, or chasing flaky tests.
• flutter-errors — Diagnosing RenderFlex overflow, unbounded constraints and setState-during-build errors.
• appllama-app-design-skill — Designing or implementing native-feeling mobile screens, onboarding, sheets, tab bars and empty states in Expo or React Native.
• apple-ecosystem-expert — Checking an iOS feature against Apple Human Interface Guidelines and platform behaviour.
• app-store-optimization — Preparing or auditing an App Store or Google Play listing: metadata, keywords and screenshots.

Commands

Invoke by name (for example /simulator-check).

• simulator-check — Build the app, run it on a simulator or emulator, and report what was actually observed on screen.
• store-readiness — Audit the project against an app-store submission checklist and list blockers.
• platform-parity — Compare iOS and Android behaviour of a feature and list platform-specific gaps.

Sub-agents

• ui-states-reviewer — Delegate to review a screen or flow for missing loading, empty, error and offline states and accessibility gaps.
• store-readiness-auditor — Delegate to audit app metadata, permissions, privacy declarations and assets before a store submission.

Scoped rules

• flutter-dart — Applies when editing Dart code in a Flutter app.
• apple-swift — Applies when editing Swift or SwiftUI code for iOS.
• react-native-expo — Applies when editing React Native or Expo screens and config.

Where each agent finds it

Agent	Instructions	Skills and commands	Rules	Sub-agents
Claude Code	CLAUDE.md (imports AGENTS.md)	.claude/skills/	.claude/rules/	.claude/agents/
OpenAI Codex	AGENTS.md	.agents/skills/	listed in AGENTS.md	.codex/agents/
Cursor	AGENTS.md	.agents/skills/, .claude/skills/	.cursor/rules/	.claude/agents/
Google Antigravity	AGENTS.md	.agents/skills/	.agents/rules/	.agents/agents/
Gemini CLI	AGENTS.md via .gemini/settings.json	.agents/skills/, .gemini/commands/	listed in AGENTS.md	.gemini/agents/
GitHub Copilot	AGENTS.md	.agents/skills/, .github/prompts/	.github/instructions/	.claude/agents/
Windsurf (Devin)	AGENTS.md	.agents/skills/, .windsurf/workflows/	.windsurf/rules/	—
opencode	AGENTS.md	.agents/skills/, .opencode/commands/	listed in AGENTS.md	.opencode/agents/
Aider	AGENTS.md via .aider.conf.yml	—	—	—

Skills are stored twice (.agents/skills/ and .claude/skills/) because Claude Code reads only its own folder. Agents that read both may list a skill twice; delete the copy you do not need.

Credits

The skills come from these open-source repositories, each under its own licence. Their licence and a notice are kept beside every copied skill.

Skill	Source	Licence
ios-simulator-skill	conorluddy/ios-simulator-skill at c535422	MIT
react-native	jezweb/claude-skills at 1260fa7	MIT
flutter-best-practices	evanca/flutter-ai-rules at 30f908d	MIT
flutter-app-architecture	evanca/flutter-ai-rules at 30f908d	MIT
testing	evanca/flutter-ai-rules at 30f908d	MIT
flutter-errors	evanca/flutter-ai-rules at 30f908d	MIT
appllama-app-design-skill	Appllama/appllama-skills at dd5caae	MIT
apple-ecosystem-expert	roedyrustam/vibes-plug at 3489fab	MIT
app-store-optimization	cbrock84/headcount at 98d1c17	MIT

Everything else in this repository (instructions, rules, commands, sub-agents) is by Kitloom under the MIT licence.

Use at your own risk

Read every file before you use it. Agent instructions can make an agent run commands on your machine. This kit was checked with Kitloom's pre-download check, which looks for warning signs but cannot prove anything is safe.