Mobile app
Say "new project" → get a perfectly-prepared project folder. A Claude Code bootstrap kit that grills the plan to a Definition of Ready, then auto-scaffolds files, memory, project sub-agents & tooling — routing to type-specific sub-skills (website, api, data/ml, quant, SaaS, CLI, app, game-mod, research, OSS… + a 7-day build-business ultraskill).
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Build and set up a mobile application project (iOS, Android, Flutter, React Native, or Expo) with screen scaffolding, signing, store-listing assets, and an EAS/native build-and-submit pipeline to the App Store and Google Play. This is a project-kit sub-skill loaded by new-project routing. Use WHENEVER the user wants to build, create, or ship a mobile app, a phone/tablet app, an iOS or Android app, or anything published to the App Store or Play Store.
SKILL.md
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mobile-app — iOS / Android applications
This sub-skill stands up a mobile application that ships to the App Store and/or Google Play. It nails the platform, the build-and-submit pipeline, signing, and the store listings up front — the parts that block a release no matter how good the app is — and scaffolds the screen structure so building starts on solid ground.
What this sub-skill is for
An app that runs on phones/tablets and is distributed through the mobile stores (or via TestFlight
/ internal track first). Use it for native and cross-platform mobile; not for desktop installs
(desktop-app), web apps (website), or backends (api-backend) — though it commonly composes
with api-backend when the app has a server.
Mandatory grill-questions (fold into the DoR)
- Platform/framework — iOS-only (Swift/SwiftUI), Android-only (Kotlin/Compose), or cross-platform: Flutter, React Native (bare), or Expo (managed). Recommended: Expo for a solo dev shipping both stores fast, unless a native-only requirement forces otherwise. Lock first.
- Target stores & accounts — App Store, Play, or both? Confirm an Apple Developer account ($99/yr) and a Google Play Console account ($25 once) exist — without them you cannot submit.
- Signing — Apple: bundle ID, certs, provisioning profiles (or EAS-managed credentials). Android: a keystore (decide who holds it; back it up — losing it blocks all future updates).
- Min OS versions & devices — minimum iOS/Android, phone-only vs. tablet/iPad, orientations.
- Screens & navigation — list the core screens and the nav model (tabs/stack/drawer) so the scaffold matches the real app, not a generic template.
- Backend & data — standalone, or an API (compose
api-backend)? Auth, offline behaviour, and where user data lives. Any push notifications (APNs/FCM)? - Permissions & privacy — camera/mic/location/contacts/health; the iOS privacy nutrition label and Android Data-safety form must be answered truthfully before submission.
- Build pipeline — EAS Build/Submit (Expo/RN), Xcode Cloud / Fastlane, or Gradle/Fastlane. macOS is required for iOS builds — confirm a Mac or a cloud build (EAS) is available.
Project sub-agents to generate (<project>/.claude/agents/)
screen-builder(delegate-by-default) — implements a screen + its navigation to the done-bar, wired to the project's component and state conventions.store-listing-writer(delegate-by-default) — drafts App Store / Play listings: title, subtitle, description, keywords, what's-new, and a screenshot/asset shot-list per device size.build-submitter— runs EAS/native build + submit, manages credentials and TestFlight / internal-track uploads; never fabricates version/build numbers.store-compliance-reviewer(delegate-by-default) — checks against App Store Review Guidelines + Play policies and the privacy/data-safety disclosures before each submission.- Plus the kit defaults:
reviewer(diff/PR) andverifier(runs the app on a simulator/device).
Tools / CLIs / MCP / skills needed
- Toolchain: Node +
expo/eas-cli(Expo/RN) or Xcode +swift/xcodebuild(iOS) / Android Studio + Gradle SDK (Android); Flutter SDK if Flutter. Check in environment-readiness. - Release:
fastlane(metadata, screenshots, submission),ghfor the source repo. iOS builds need macOS — flag if absent and route to EAS cloud builds. - Assets: an icon/splash generator and a device-frame screenshot tool for store images.
- CHAIN global skills:
verify(run on simulator/device),code-review,doc-coauthoring(store copy + README + privacy policy),update-config(allow build/submit commands). For UI inspiration theframer-inspiration/design-harvestskills inform layout and tokens even though it's not a website.
File / asset nudges (on top of the base set)
app/orsrc/screens/— the scaffolded screen tree matching the grilled nav model.store/ios/+store/android/— listing copy, keywords, what's-new, and the screenshot shot-list.store/assets/— icon, splash, and per-device-size screenshot frames.credentials/—.gitignored slot for keystore, provisioning profiles, and API keys (never committed).eas.json/fastlane/— the build-and-submit config.PRIVACY.md— the privacy policy + the truthful answers for the iOS label and Play data-safety form.
Stack defaults & done-bar
Default stack: Expo (managed RN) + EAS Build/Submit, TypeScript, file-based navigation, Fastlane for store metadata/screenshots, both stores targeted. (Switch to native or Flutter if grilled.) Done-bar (all true): the app builds a release artifact for each target platform; it installs and runs on a real device (or TestFlight / internal track) and survives a cold start; signing and credentials are valid and backed up; the store listing (copy + screenshots + privacy disclosures) is complete and passes the compliance reviewer; an internal/TestFlight build has been submitted successfully end-to-end.
Guardrails
- No emojis in the app UI or notifications — typographic symbols or drawn elements only (standing user rule).
- Truthful store disclosures: privacy labels, data-safety, and permission usage strings must match what the app actually does — misrepresentation gets apps pulled.
- Never commit keystores, provisioning profiles, certs, or API keys —
.gitignorethem; warn that a lost Android keystore permanently blocks updates. - Don't claim store-readiness until the compliance reviewer passes and a build has actually submitted; report blockers honestly.
- Commit under the user's own name only (Skryx-L-A) — never add Claude as a co-author.
- No dark patterns / forced reviews / hidden subscriptions — they violate both stores' policies.