Developer Tools & Repos Agent Skills

Use when developing applications with the Summon Kotlin Multiplatform UI framework.

FastAPI with Supabase and SQLAlchemy/SQLModel

Implement Supabase database webhooks, pg_net async HTTP, LISTEN/NOTIFY,

Set up local development linting by picking the right linters for each file type a project uses, then recording them as required…

A guide for coding with UdonSharp. Use this when you are asked to create or edit UdonSharp programs. Code that inherits from…

A third-party SDK throws a rich, structured error (HTTP status, machine code, human-readable long message, trace id, per-item failures)…

Incremental refactorer. Use when refactoring ONE module at a time within a rescue workflow after safeguard has set up safety nets — never…

Run the checks that match the repo's normal contribution flow before pushing: Run browser coverage too when the change is user-facing…

Guidance on writing fast, robust, modern Svelte code.

Graphical and UI/UX design improvements for SvelteKit browser games, including layout, typography, color systems, HUD design, visual…

End-to-end planning, building, and testing of small-scale browser games in SvelteKit + TypeScript running in Docker, including…

SvelteKit data flow guidance. Use for load functions, form actions, server/client data, and invalidation. Covers +page.server.ts vs…

Build token swap functionality with Circle App Kit or standalone Swap Kit SDKs.

Code-level cleanup with a coverage map — scans ONE area for dead code, duplication and stale tests, reports, and removes only what a…

Use when Swift code crosses actors or tasks, handles `Sendable`/`sending`, async isolation, cancellation, `TaskGroup`, `Mutex`, atomics…

Use when you see 'actor-isolated', 'Sendable', 'data race', '@MainActor' errors, or when asking 'why is this not thread safe', 'how do I…

Comprehensive analysis of Swift 6 ownership, concurrency safety, and systems programming foundations.

When to activate: iOS/macOS accessibility, VoiceOver, accessibilityLabel, accessibilityHint, Dynamic Type, high contrast, SwiftUI…

Thread-safe data persistence in Swift using actors — in-memory cache with file-backed storage, eliminating data races by design.

When to activate: iOS/macOS app architecture, MVVM, TCA, Clean Architecture, dependency injection, modular design in Swift apps

Use whenever designing, building, reviewing, or refactoring the UI of a Swift/SwiftUI (or UIKit) view for iOS, iPadOS, macOS, watchOS…