Mobile

Use after code review - implement ALL findings; any finding not fixed MUST have tracking issue created; no finding disappears without trace

Master Swift programming fundamentals - syntax, types, optionals, protocols, error handling

1600+ lines of testing mastery - unit tests, widget tests, integration tests, E2E, coverage, mocking with production-ready code examples.

Apply when writing commit messages to maintain consistent, readable git history that enables automated changelog generation.

Codex CLI integration for code review and consultation. Use when: (1) code needs review before commit, (2) need expert consultation on implementation approach, (3) debugging assistance needed. This skill provides Codex interaction patterns only - workflow orchestration is defined in project CLAUDE.md.

UX expert for WTP, an iOS espresso shot dialing app. Use when working on WTP user experience including critiquing flows/screens, generating UX concepts, writing user stories, conducting accessibility audits, designing gamification/motivation systems, or any design decisions. Triggers on terms like UX, user experience, flow, screen, accessibility, user story, design critique, usability, HIG, gamification, achievements, streaks, or motivation for WTP contexts.

Master Swift concurrency - async/await, actors, structured concurrency, Sendable, TaskGroups

F# Domain/Application層とC# Infrastructure/Web層の型変換パターンを自律的に適用。F#↔C#境界コード実装時・型変換エラー発生時・contracts-bridge Agent作業時に使用。Phase B1で確立した4つの変換パターンをガイド。

Professional design director that elevates visual outputs through systematic design thinking. Applies warm color palettes, subtle shadows, generous whitespace, and motivation-aware patterns to dashboards, interfaces, and reports.

Systematic debugging methodology, root cause analysis, performance profiling, and troubleshooting strategies for JavaScript and web applications. Covers VSCode debugging tools, console techniques, and professional debugging workflows.

Advanced TypeScript types including generics, conditionals, and mapped types

Audit and improve SwiftUI runtime performance from code review and architecture. Use for requests to diagnose slow rendering, janky scrolling, high CPU/memory usage, excessive view updates, or layout thrash in SwiftUI apps, and to provide guidance for user-run Instruments profiling when code review alone is insufficient.

Use after writing a new skill and/or when testing existing skills, creating skill evaluations, or verifying skills work under pressure - applies TDD/RED-GREEN-REFACTOR to skill documentation by running baseline tests, measuring compliance, and closing rationalization loopholes

Flip problems, assumptions, and approaches upside down to discover insights hidden by conventional framing, often revealing solutions that forward thinking misses. Use when: (1) asked to flip the problem or consider the opposite approach, (2) optimizing variables without questioning whether they're the right variables to optimize, (3) forcing behavior against natural resistance suggests the system fights the solution, (4) current framing may create the problem it attempts to solve.

Apply when implementing authentication: sign up, sign in, OAuth providers, session management, and protected routes.

This skill should be used when scaffolding complex concepts for learners. It applies cognitive load architecture principles to break down concepts into digestible pieces while respecting learning science limits.

Kotlin 2.0+ development specialist covering Ktor, coroutines, Compose Multiplatform, and Kotlin-idiomatic patterns. Use when building Kotlin server apps, Android apps, or multiplatform projects.

Big tech ML engineer to indie founder transition coach. Expert in idea validation, MVP development, marketing, monetization, and sustainable growth for ADHD entrepreneurs. Activate on 'entrepreneur', 'indie founder', 'startup', 'MVP', 'monetization', 'big tech to indie', 'ADHD business', 'app launch', 'side project'. NOT for neurotypical entrepreneurship, VC-backed startups, or traditional business consulting without ADHD context.

Expert photography composition critic grounded in graduate-level visual aesthetics education, computational aesthetics research (AVA, NIMA, LAION-Aesthetics, VisualQuality-R1), and professional image analysis with custom tooling. Use for image quality assessment, composition analysis, aesthetic scoring, photo critique. Activate on "photo critique", "composition analysis", "image aesthetics", "NIMA", "AVA dataset", "visual quality". NOT for photo editing/retouching (use native-app-designer), generating images (use Stability AI directly), or basic image processing (use clip-aware-embeddings).

Game monetization strategies, in-app purchases, battle passes, ads integration, and player retention mechanics. Ethical monetization that respects players.