“Backend development”

Create background worker creator operations.

Use when executing a written implementation plan with independent tasks in the current session where delegation beats inline coordination cost; otherwise…

Developer experience (DX) engineering, SDK design patterns, API ergonomics, CLI tooling design, documentation-driven development, and developer onboarding.

Svelte 5 development with runes ($state, $derived, $effect), SvelteKit full-stack framework, and modern reactive patterns.

WHEN to auto-invoke: Creating UI components, building React/Vue/Svelte components, Next.js pages, styling with Tailwind/CSS, state management setup, form…

Moved to backend-build in skills-developer.

Use when implementing, refactoring, debugging, or reviewing source code or maintained code examples.

Architecture, conventions, and implementation workflows for full-stack systems, backend APIs, modern frontends, and database migrations.

Use when verified work needs integration or cleanup of an existing task-created branch/worktree, or the user explicitly requests merge, PR, or branch…

Complete full-stack development with frontend, backend, database, and deployment.

开发或修改前端页面、交互和样式时使用；复用项目已有组件与主题，按职责组织代码，隔离数据及业务操作，保持正式页面与已获授权原型的一致性。不自动制作原型。

Comprehensive macOS development guidance including Swift 6+, SwiftUI, SwiftData, architecture patterns, AppKit bridging, and macOS 26 Tahoe APIs.

Swift language patterns and best practices including concurrency, performance, and modern idioms.

WHEN to auto-invoke: Creating API routes, building endpoints, adding route.ts files, implementing REST/GraphQL APIs, adding authentication to APIs, rate…

Develop fmind/dot CLI commands, session parsers, storage, configuration, and installation.

Develop, debug, and manage Temporal applications across Python, TypeScript, Go, Java, .NET, Ruby, and Rust.

Angular framework development, migration, and component generation.

R package development with devtools, testthat, and roxygen2.

Expert WebXR and immersive technology developer specializing in browser-based AR/VR/XR applications with cross-device compatibility.

Build AI agents with Pydantic AI (Python) and Claude SDK (Node.js)

Guide feature development with architecture patterns for any tech stack.

Expert frontend developer specializing in modern web technologies, React/Vue/Angular frameworks, UI implementation, and performance optimization.

Bun projects - native APIs, bun test, bun build --compile, tsconfig.

Execute an approved plan by delegating isolatable steps to isolated child sessions (Host serializes writers), then review diffs and verify in the parent.