API design

Designs REST and GraphQL APIs from resource modeling to an OpenAPI 3.1 contract, with versioning, pagination and RFC 7807 error handling.

Jeffallan/claude-skills

This skill should be used when the user is writing Go code and needs guidance on Go-specific pedantry: error wrapping with fmt.Errorf and %w, interface design (accept interfaces return structs)…

chromedp/chromedp

Build production-ready Node.js backend services with Express/Fastify, implementing middleware patterns, error handling, authentication, database integration, and API design best practices.

ever-works/ever-works

Use whenever asked to add, create, or scaffold a CRUD endpoint, router, or entity in this repo's server (create/list/get/update/delete handlers, new…

fosrl/pangolin

Backend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, and Next.js API routes.

hellangleZ/burn-in-cceverywhere-ralph

Guides stable API and interface design. An agent skill from dzhalaevd/Donatello.

dzhalaevd/Donatello

REST 및 GraphQL API 설계 원칙 가이드. An agent skill from jh941213/my-cc-harness.

jh941213/my-cc-harness

Reviews or designs an HTTP/JSON API's endpoints, auth, pagination, versioning and deprecations, guarding against inventing a bespoke interface or silently breaking consumers.

AmazingAng/old-coder

Designs REST and GraphQL APIs including endpoints, error handling, versioning, and documentation.

CloudAI-X/claude-workflow-v2

Covers developing the LangBot core backend and web UI: dev setup, repo layout, API auth types, adding endpoints, migrations and keeping the MCP server in step.

langbot-app/LangBot

Design, improve, and review interfaces for websites, apps, dashboards, and components: explore distinct design directions, compare styles side by side, and refine visual hierarchy against real…

oil-oil/oil-ui

Designs GraphQL schemas and Apollo Federation graphs, with DataLoader resolvers, subscriptions, query complexity limits and caching.

Jeffallan/claude-skills

This skill should be used when the user asks to "add an API call", "change a backend", "update settings persistence", "change conversation events", "fix backend auth", "add Agent Server support", or…

OpenHands/OpenHands

Reviews REST API design for correct HTTP verbs, versioning, DTO use, consistent responses and backward compatibility before an API change ships.

decebals/claude-code-java

Applies extend-only design rules to NuGet packages and distributed systems, covering source, binary and wire compatibility and how to deprecate members safely.

Aaronontheweb/dotnet-skills

Comprehensive code review for Java - clean code principles, API contracts, null safety, exception handling, and performance.

piomin/claude-ai-spring-boot

Review changes to Polar's API contract — Pydantic schemas, FastAPI endpoints, OpenAPI output and the generated SDKs.

polarsource/polar

Design or review software architecture, API contracts, data models, and module boundaries for the Static Web Server (SWS) project

static-web-server/static-web-server

A skill your agent uses when: generating TypeScript API layer (type definitions + request functions) from page-spec JSON or Swagger/OpenAPI docs.

ChenyCHENYU/Robot_Admin

A skill your agent uses when reviewing a proposed REST or GraphQL API change before merge — checks contract clarity, backwards compatibility, errors, pagination, auth, and naming.

oxbshw/LLM-Agents-Ecosystem-Handbook

Software design philosophy guide based on John Ousterhout's "A Philosophy of Software Design." Use this skill during: code reviews, architecture discussions, API design, module decomposition…

luoling8192/software-design-philosophy-skill

Step-by-step guide for implementing AndroidX WebKit APIs in frameworks/support/webkit/ after boundary interface roll.

androidx/androidx

Entry point for building an MCP server: asks about the use case, picks a deployment model and tool-design pattern, then hands off to more specialized skills.

anthropics/claude-plugins-official

Guides REST and GraphQL API design, endpoint patterns, request/response schemas, versioning, and API best practices.

CloudAI-X/opencode-workflow

A skill your agent uses when debugging UE C++ crashes, runtime bugs, or unexpected behavior with Rider MCP available.

JasonMa0012/MooaToon

R package development guide covering dependencies, API design, testing, and documentation.

ab604/claude-code-r-skills

Define implementation contracts (APIs and data models) that developers will build against during PRD v0.6 Architecture.

mattgierhart/PRD-driven-context-engineering

Assesses what an API change would break before it is made, finds every usage, documents the impact and plans a deprecation or migration path.

ruby-git/ruby-git

Design or review REST and GraphQL API interfaces. An agent skill from agulli/atlas-agents.

agulli/atlas-agents

API route implementation patterns with RLS, validation, and error handling. Use when creating API routes, implementing CRUD endpoints, adding…

bybren-llc/safe-agentic-workflow

Reviews API design, REST conventions, and backend architecture.

DanielPodolsky/ownyourcode

Maintain portable Feature Track docs for project features. An agent skill from JunsW/feature-track.

JunsW/feature-track

Generate multiple radically different interface designs for a module using parallel sub-agents.

fossasia/eventyay-interpretation

Checklist for adding, changing, deprecating or removing Saleor GraphQL fields, mutations, enums and webhook event types so the change passes review first time.

saleor/saleor

Routes backend work in the Superloopy loop harness to the right reference module, covering API contracts, schema migrations, transactions, background jobs, caching and security.

beefiker/superloopy

Idiomatic Go - package and interface design, error wrapping, table-driven tests, generics, the modern standard library (slices/maps/cmp/errors.Join), current syntax, and logging discipline.

inference-gateway/inference-gateway

A skill your agent uses when optimizing, refactoring, reviewing, or fixing AtomUI controls, including control API contracts, member layout, file splitting, lifecycle, AXAML structure, correctness…

AtomUI/AtomUI

当设计或修改 REST API 响应结构、处理 API 返回值，或生成 Excel/CSV/PDF/对账文件等下游产物时触发。防止 API 设计缺陷导致的字段错位、类型歧义，以及生成产物时关键字段缺失但静默成功的问题。

doccker/cc-use-exp

Apple's approach to interface design and fluid, physical motion, translated for the web.

flornkm/personal-site

Idiomatic Go conventions — naming, error handling, concurrency, interfaces, testing, and API design.

asymmetric-research/solana-exporter

Write modern, high-performance C code using records, pattern matching, value objects, async/await, Span<T/Memory<T, and best-practice API design patterns.

sketch7/FluentlyHttpClient

A skill your agent uses when you need to add or review fuzz testing for Java APIs with CATS — including contract-driven negative testing, malformed payload validation, boundary input exploration, CI…

jabrena/plinth

REST API design principles and best practices. An agent skill from cohen-liel/hivemind.

cohen-liel/hivemind

Guidelines for reviewing API design in the Hex1b codebase. An agent skill from mitchdenny/hex1b.

mitchdenny/hex1b

Builds and designs React Native Nitro Modules with Nitrogen, HybridObject TypeScript specs, Nitro View components, generated native implementations, zero-copy and native-state APIs, Swift/Kotlin/C++…

margelo/react-native-skills

Comprehensive Rust coding guidelines with 265 rules across 26 categories.

JMBeresford/retrom

Evaluates system boundaries and tradeoffs and writes architecture recommendations, option comparisons or ADRs, with a Mermaid diagram when structure changes.

first-fluke/oh-my-agent

Generate, build, and test Azure SDKs locally from TypeSpec with automatic customization.

Azure/azure-sdk-for-android