Best API design skills, page 3

Express.js REST API design and implementation guide. An agent skill from revfactory/claude-code-harness.

revfactory/claude-code-harness

Expert backend architect specializing in scalable API design, microservices architecture, and distributed systems.

davila7/claude-code-templates

Finds OpenAPI, GraphQL, Protobuf and JSON Schema files in a codebase and extracts behavioral claims from them as part of a reverse-engineering workflow.

prime-radiant-inc/greenfield

Scope the physical and interface design of a laboratory before configuring it.

fl-sean03/OpenSDL

Review code for any Frappe application — a checklist distilled from years of engineering practice on correctness, security, performance, concurrency, readability, API design, and testing.

frappe/skills

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

Jeffallan/claude-skills

Ukrainian-language skill for writing API documentation from source code: OpenAPI specs, endpoint pages, SDK examples, integration and authentication guides and error code references.

luongnv89/claude-howto

Chinese-language skill that produces API docs from source code, covering OpenAPI specs, endpoint write-ups, SDK usage samples, integration guides, error code tables and auth guides.

luongnv89/claude-howto

Guidelines for introducing and using nullable reference types (NRT) and System.Diagnostics.CodeAnalysis nullable attributes in C / .NET codebases.

Aaronontheweb/dotnet-skills

DO NOT USE when the target already consumes an injected interface or built-in abstraction such as IFileSystem or TimeProvider, even if the request says "generate a wrapper"; no new wrapper is needed.

dotnet/skills

Checks whether a tRPC procedure change is safe for released desktop, mobile, CLI and SDK builds, picks a compatible pattern and decides when a deprecated procedure can go.

superset-sh/superset

REST API设计模式，包括资源命名、状态码、分页、过滤、错误响应、版本控制和生产API的速率限制. An agent skill from affaan-m/ECC.

affaan-m/ECC

Implement secure API design patterns including authentication, authorization, input validation, rate limiting, and protection against common API vulnerabilities

davila7/claude-code-templates

A skill your agent uses when designing, implementing, or reviewing an HTTP API — endpoints, request and response shapes, errors, pagination, versioning, and authorization.

WrongStack/WrongStack

Automatically discover API design skills when working with REST APIs, GraphQL schemas, API authentication, OAuth, JWT, rate limiting, API versioning, error handling, or endpoint design.

rand/cc-polymath

A skill your agent uses when adding or changing routes, middleware, or error handling in this Express.js API, to keep endpoints consistent, validated, and testable.

johnku2011/boilerplates-with-ai-skills

Implements RESTful API design with versioning and request specs.

ThibautBaissac/rails_ai_agents

REST API design patterns including resource naming, status codes, pagination, filtering, error responses, versioning, and rate limiting for production APIs.

ProgrammerAnthony/Expert-Coding-Harness

Reviews test code in GitHub pull requests for isolation, public-API contract coverage, AAA structure, and correct exception assertions.

axelixlabs/axelix

The hard rules for editing @kortix/sdk (packages/sdk) — a PUBLISHED npm package with constraints no other package in this repo has: TDD is mandatory (failing test first, gates run and pasted every…

kortix-ai/suna

Foundational software design principles applied specifically to robotics module development.

arpitg1304/robotics-agent-skills

Design and review predictable public APIs for TypeScript, JavaScript, React, and React Native libraries.

margelo/react-native-skills

Rust code conventions covering edition 2024, cargo fmt/clippy, Result-based error handling, unsafe discipline, async with tokio, API-guideline naming, trait implementations, benchmarking, and…

Goldziher/ai-rulez

Builds .NET UI apps across Blazor (Server, WASM, Hybrid, Auto), MAUI (XAML, MVVM, Shell, Native AOT), Uno Platform (MVUX, Extensions, Toolkit), WPF (.NET 8+, Fluent theme), WinUI 3 (Windows App SDK…

novotnyllc/dotnet-artisan

Methodology for systematically designing and generating CLI tool argument parser structures.

revfactory/harness-100

A skill your agent uses when designing a new REST or GraphQL API, reviewing an API spec before implementation, setting team API standards, or migrating REST to GraphQL.

coco-research/coco

Design rules for command-line tools that coding agents can run reliably: flags over prompts, layered help with examples, fast errors, idempotency and dry-run.

cursor/plugins

The public-API contract SmithyDotNet-generated code must match against the shipping AWS SDK for .NET - what must match vs.

aws/aws-sdk-net

Add new C APIs to SkiaSharp by wrapping Skia C++ functionality, or review existing API PRs for correctness and style.

mono/SkiaSharp

Constitutional source of truth for reusable Plate architecture and public API design.

udecode/plate

A skill your agent uses to derive the API contract for a feature — an OpenAPI 3.1 document at docs/features/{slug}/contracts/openapi.yaml plus a drift/sync report (and an events doc when the feature…

genkovich/sdd

Writes new tests for Axelix source code (Java, Kotlin, TypeScript, JavaScript) that follow the project's testing standards — public-API contract coverage, test isolation, given/when/then structure…

axelixlabs/axelix

API design principles and decision-making. An agent skill from xenitV1/Antigravity-Workflows.

xenitV1/Antigravity-Workflows

REST and GraphQL API design patterns, OpenAPI/Swagger specifications, versioning strategies, and authentication patterns.

rsmdt/the-startup

Specialized integration evaluator for the Evaluate-Loop. An agent skill from Ibrahim-3d/orchestrator-supaconductor.

Ibrahim-3d/orchestrator-supaconductor

A skill your agent uses when designing new REST endpoints, reviewing an existing API contract, adding pagination or filtering, planning a versioning strategy, or building a public or partner-facing…

kid-sid/claude-spellbook

Quarkus 3.x LTS architecture patterns with Camel for messaging, RESTful API design, CDI services, data access with Panache, and async processing.

affaan-m/ECC

Build, refactor, or review Effect v4 HttpApi services on Cloudflare Workers.

Consensys/c0

Review Anarlog API contracts and generated clients, deploy required hosted services and database changes, and verify live release behavior.

fastrepl/anarlog

Review system architecture, simplify boundaries, or compare interface designs from repository evidence

nyldn/claude-octopus

REST API tasarım kalıpları; kaynak isimlendirme, durum kodları, sayfalama, filtreleme, hata yanıtları, versiyonlama ve üretim API'leri için hız sınırlama içerir.

affaan-m/ECC

Find places where documented API contracts and the implementation diverge

ben-manes/caffeine

API design conventions, namespace coordinate system, RBAC roles, ClawHub compatibility layer, OpenAPI contract sync rules, and CSRF/session handling.

iflytek/skillhub

A skill your agent uses when designing or reviewing the request layer of a frontend project (web / uni-app / mini-program), including request.ts wrappers, interceptors, deduplication, mocks, error…

jiushiwon/wg-skills

A skill your agent uses when auditing whether a field, enum, flag, or API contract propagates consistently across storage, services, clients, analytics, and tests.

sickn33/agentic-awesome-skills

Web and App implementation guide for Sci-Fi Interface Design.

sickn33/agentic-awesome-skills

A skill your agent uses when writing a client for someone else's REST or GraphQL API: auth flow choice and token refresh, pagination to exhaustion, retry-with-jitter on transient failures only…

ericrisco/rsc-harness

Interface design principles for package APIs — where configuration, behavior, and state belong across schema, endpoint, and hook layers.

reactive/data-client