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Shelves Architecture & codebase

API design

476 rows from 232 repositories

Designing the interface before implementing behind it.

What API design skills agree on

203 skill files read, by 224 of the 224 authors on this shelf whose files we hold, 2026-09-06

The middle one of the 35 measured here is ~1.7k tokens long, counted with cl100k_base

Counted by distinct author, so one author publishing three of these counts once. Where a claim sits in fewer files than authors, that is said: a claim held by forty authors across three files is one file people copied, not forty people who agreed. Near-identical wordings are grouped and the other wordings are shown, so the grouping is yours to check.

What they tell the agent to do

  1. Use plural nouns for resource names50 of 224 in 49 filesalso worded as Use plural nouns for resource paths; Use plural nouns for resource naming
  2. Implement pagination for all list endpoints42 of 224 in 32 filesalso worded as Implement pagination for list endpoints; Implement pagination for all collection endpoints
  3. Use cursor-based pagination for large datasets42 of 224 in 40 filesalso worded as Use cursor-based pagination for GraphQL; use cursor-based pagination by default
  4. Return appropriate HTTP status codes for all responses31 of 224 in 21 filesalso worded as Return appropriate HTTP status codes; Use standard HTTP status codes for responses
  5. Use URL path versioning for API changes29 of 224 in 19 filesalso worded as use URL path versioning; Use URL versioning for API evolution
  6. Use HTTP methods semantically for CRUD operations22 of 224 in 13 filesalso worded as use standard HTTP methods for CRUD operations; Use HTTP methods semantically for resource operations
  7. Use HTTP methods for resource actions20 of 224 in 18 filesalso worded as Use standard HTTP methods for resource operations; Use HTTP methods to define actions
  8. Use plural nouns in kebab-case for resource URLs18 of 224 in 9 filesalso worded as Use plural nouns and kebab-case for URLs; use plural kebab-case nouns for resources
  9. Enforce authentication and authorization on all resources17 of 224 in 7 filesalso worded as Enforce authentication and authorization on every endpoint; Enforce authentication on all endpoints
  10. Use standard HTTP status codes17 of 224also worded as Use standard HTTP status codes for error responses; use standard HTTP status codes correctly
  11. Validate all incoming request data against a schema16 of 224 in 7 filesalso worded as Validate every response against the OpenAPI schema; validate incoming GraphQL queries against the schema
  12. Limit URL nesting to two levels16 of 224also worded as Limit nested paths to two levels; Limit nested routes to two levels
  13. Include Location header for created resources15 of 224 in 6 files
  14. Configure rate limiting for all API endpoints15 of 224 in 6 filesalso worded as Rate limit all API endpoints; Configure rate limiting for all endpoints
  15. Use kebab-case for multi-word paths15 of 224also worded as use kebab-case for multi-word resources; Use kebab-case for URL paths

What they tell it not to do

  1. Do not use verbs in resource URLs66 of 224 in 56 filesalso worded as Do not use verbs in URLs; Do not use verbs in URL paths
  2. Do not return 200 OK for all responses34 of 224 in 25 filesalso worded as Do not return 200 status codes for errors; Do not return 200 OK for error responses
  3. Do not expose internal server error details21 of 224 in 12 filesalso worded as do not expose internal server details in errors; do not expose internal details in error messages
  4. Do not use singular nouns for resources20 of 224 in 11 files
  5. Do not use snake_case in URLs20 of 224 in 11 filesalso worded as Do not use snake_case in JSON bodies; do not use snake_case for URLs
  6. Do not expose stack traces in production12 of 224 in 11 filesalso worded as never expose stack traces or internal paths; do not expose stack traces or internal system details
  7. Do not make breaking changes without versioning10 of 224also worded as Do not make breaking changes in minor versions; Do not make breaking changes to existing versions
  8. Do not expose internal IDs9 of 224 in 8 filesalso worded as Do not expose internal database structures; Do not expose internal details
  9. Do not use offset-based pagination9 of 224also worded as Do not use offset pagination for external consumers; Do not use offset pagination for mutable data
  10. Do not return error bodies with 200 status codes9 of 224also worded as Do not return 200 for error states; do not use 200 status code for everything

What they expect to be installed

  1. OpenAPI65 of 224 in 52 files
  2. Swagger38 of 224 in 27 files
  3. Zod30 of 224 in 21 files
  4. Pydantic19 of 224 in 10 files
  5. grep10 of 224
  6. Spectral10 of 224
  7. GraphQL9 of 224
  8. Pact9 of 224
  9. DataLoader9 of 224 in 8 files
  10. Django8 of 224 in 3 files

What they ask it to produce

  1. OpenAPI specification56 of 224 in 45 filesalso worded as API specifications; OpenAPI specification file
  2. API documentation47 of 224 in 36 filesalso worded as OpenAPI documentation; API design documentation
  3. API endpoint design29 of 224 in 19 filesalso worded as API endpoints; API endpoint definitions
  4. API contract18 of 224also worded as API contract documentation; API contracts
  5. GraphQL schema17 of 224 in 15 filesalso worded as schema.graphql; GraphQL schemas
  6. Custom middleware9 of 224 in 4 filesalso worded as middleware
  7. Custom QuerySets8 of 224 in 3 files
  8. Service layer classes8 of 224 in 3 files

When API design authors say to reach for one

The situations these authors wrote into their own files, counted out of the same 224 authors, with the skills that name each one

How API design skills are built

433 skill directories by 214 authors, read from their repositories’ own file trees 2026-08-05

The middle bundle among those shipping files is 3 files, 21.0 KB beside SKILL.md

Counted by distinct author, same as above, so one author publishing forty template copies counts once. SKILL.md itself is not counted as a file, so a single-file skill is one where that file is the whole skill.

The shape

  1. SKILL.md is the whole skill106 of 214 authors, 233 of 433 skills
  2. files ship beside it108 of 214 authors, 200 of 433 skills
  3. executable scripts ship inside32 of 214 authors, 48 of 433 skills

The folders they converge on

  1. references/71 of 214 authors, 108 of 433 skills
  2. assets/23 of 214 authors, 32 of 433 skills
  3. scripts/15 of 214 authors, 19 of 433 skills
  4. agents/13 of 214 authors, 18 of 433 skills
  5. evals/13 of 214 authors, 23 of 433 skills
  6. templates/10 of 214 authors, 17 of 433 skills

  • Api contract review

    decebals/claude-code-java/.claude/skills/api-contract-review Skill

    703★ repo

    Reusable AI development infrastructure for Java projects, optimized for Claude Code

  • Api design

    margelo/react-native-skills/skills/api-design Skill

    no license154★ repo

    The best react-native Agent Skills. Forget 10x, this is 100x.

  • Api design patterns

    AsyrafHussin/agent-skills/skills/api-design-patterns Skill

    62★ repo

    Agent skills for AI coding agents (Claude Code, Cursor, Codex, Windsurf) — Laravel, React, TypeScript, MySQL, code quality, technical debt, documentation, and security.

  • Api design

    proyecto26/system-design-skills/skills/api-design Skill

    46★ repo

    A divide-and-conquer wiki of system-design skills for Claude Code — reason about scalable systems, don't memorize architectures.

  • Api contract first

    robisson/build-like-amazon-agent-skills/skills/api-contract-first Skill

    13★ repo

    Production-grade engineering skills for AI coding agents, built on Amazon Way of building services

  • Sota api design

    martinholovsky/SOTA-skills/skills/sota-api-design Skill

    12★ repo

    State-of-the-Art (2026) AI/LLM engineering skills/agents for building and auditing software — 40+ domain & language skills, BUILD/AUDIT modes, audit checklists.

  • Api design

    wpank/ai/skills/api/api-design Skill

    no license11★ repo

    A curated collection of 115 skills, 16 agents, and 48 commands for Claude Code and Cursor.

  • Api design principles

    carlopezzuto/agents/.claude/skills/api-design-principles Skill

    3★ repo

    Claude Code configuration with 42 specialized agents, 33 skills, 28 commands, and a hook system for development best practices

  • Api design

    ProjAnvil/MindForge/skills/en/api-design Skill

    3★ repo

    A comprehensive AI toolkit for Claude Code featuring multi-language agents, reusable skills, and MCP services to supercharge your development workflow

  • Api design

    iwritec0de/app-dev/skills/api-design Skill

    3★ repo

    Full-stack Next.js development plugin for Claude Code

  • Api contract review

    ldilov/harness-forge/skills/api-contract-review Skill

    3★ repo

    AI coding agent runtime that makes LLMs understand your codebase with repository-aware context, memory, and continuous learning

  • Api design

    halflength-ampleness75/claude-code-recipes/skills/api-design Skill

    2★ repo

    Provide ready-to-use Claude Code commands, subagents, hooks, skills, and configs to simplify setup and speed up development.

  • Api design review

    chrislacey89/skills/api-design-review Skill

    2★ repo

    Pipeline-first Claude Code skills pack — 19 composable skills for structured feature delivery from shape to ship

  • Api sculptor

    mturac/hermes-supercode-skills/skills/api-sculptor Skill

    2★ repo

    ⚡ 13 production-grade skills for Claude Code · db-whisperer, auth-architect, obs-guardian + 10 more · Zero config · MIT

  • Api contract evolution

    ajaygodbole7/rest-api-skill/skills/api-contract-evolution Skill

    no license2★ repo

    Zalando RESTful API Guidelines reformatted as Agent Skills for AI coding agents

  • Api design review

    Noorkhalel/saas-ai-skills/skills/api-design-review Skill

    1★ repo

    Open-source AI Skills library for building, improving, and scaling modern SaaS applications.

  • Pwp api design

    shandar/pwp-plugin/skills/pwp-api-design Skill

    1★ repo

    11 systematic skills for Claude Code — structured protocols for debugging, code review, security, refactoring, testing, deployment, and more. No vibes, just discipline.

  • Api design

    0xc000022070/agentic-flake/examples/3-home-manager/skills/api-design Skill

    no license1★ repo

    Composable agent skills and project-scoped environments for Nix.

  • Api design

    SkillMedev/full-stack-web-dev/skills/api-design Skill

    1★ repo

    Next.js to Postgres — build and ship a modern web app end to end.

  • Api design

    simanam/theaiteam/team/skills/architecture/api-design Skill

    no license1★ repo

    Reusable, provider-agnostic AI team. Drop a project brief, get end-to-end delivery. 12 role agents + 112 skills + orchestrator + self-improvement. Works with Claude Code, Codex, or Gemini.

  • Api design

    SkillMedev/technical-writing-studio/skills/api-design Skill

    1★ repo

    Docs people actually read — READMEs, guides, changelogs, and specs.

  • Api design

    marktco/agentic-de-atrophy/skills/design/api-design Skill

    1★ repo

    Skills for stronger programming practice in the AI/agent era.

  • Api design

    aps08/fullstack-clean-architecture/.agents/skills/api_design Skill

    1★ repo

    Read to code, just run Docker compose.

  • Sharp api design

    zhouhuijia/sharp-skills/skills/sharp-api-design Skill

    no license1★ repo

    AI Agent 品控规则合集。Stop AI slop — 六个模块，七平台兼容，一行命令安装。

  • Api design

    piyushzala158/agent-skills/api-design Skill

    1★ repo

    collection of reusable engineering skills for AI coding agents

  • Api contract review

    tunahanaliozturk/secure-dotnet-skills/skills/api-contract-review Skill

    1★ repo

    Aegis — 12 judgment-style agent skills for secure, production-grade .NET on Azure (security, design, performance, concurrency, observability). Works with Claude Code, Codex, Cursor, Gemini.

  • Skill

    mohamedzhioua/proofguard/deferred/api-contract-guard/skill Skill

    1★ repo

    Kill-tested guard skills for AI coding agents , self-invoking quality gates that catch AI failure modes in security, tests, docs, dependencies, and diffs before the agent says "done." Works with Claude Code, Codex, and Cursor.

  • Api contract

    YouRen1320/agent-project-kit/.agents/skills/api-contract Skill

    1★ repo

    Reusable repository guidance, workflows, runbooks, and skills for people, Codex, and Claude Code.

  • Api design

    BTN101/claude-skill-pack/skills/engineering/api-design Skill

    0★ repo

    Claude skills organized into domain layers — engineering, product, founder/GTM, design, and documents

  • Contract test writer

    SkillMedev/qa-test-automation/skills/contract-test-writer Skill

    0★ repo

    Build a test suite that actually catches bugs — and stops flaking.

  • Api design pro

    jayesh-bansal/api-design-pro Skill

    no license0★

    Claude skill: API design intelligence - REST conventions, RFC 9457 errors, cursor pagination, idempotency keys, signed webhooks. Design APIs like Stripe, not a CRUD generator.

  • Api contract

    digitaldreams/tuhin/skills/api-contract Skill

    0★ repo

    My dev identity as a Claude Code plugin — a full Laravel team in a box: SDLC pipeline, task board, coding agents, and audit skills.

  • Api design

    Baufest/skills/skills/api-design Skill

    0★ repo

    Public repository for a curated collection of agent skills

  • Api design

    rynhardt-potgieter/sprint_workflow/plugins/sprint-workflow/skills/api-design Skill

    0★ repo

    A portable Claude Code plugin system for orchestrating software development through parallel specialist agents, enforced engineering standards, and automated quality gates. One command to plan. Parallel agents to build. Automated gates to ship.

  • Nestjs 2muchcoffee

    2muchcoffeecom/nestjs-manifesto/.claude/skills/nestjs-2muchcoffee Skill

    0★ repo

    The 2muchcoffee NestJS engineering manifesto plus drop-in agent skill files for Claude Code, Cursor, and Codex.

  • Api design

    tyecode/skills/skills/engineering/api-design Skill

    0★ repo

    Personal AI agent skills for better coding. Fixes common agent failure modes: misaligned requirements, blind coding, debugging loops, and lost context between sessions.

  • Api contract validation

    TheophilusChinomona/idev/skills/api-contract-validation Skill

    0★ repo

    Claude Code plugin: token-optimized dev workflow — cached project context, pattern scanners, build & wiring verification, session persistence, self-review. 23 skills, 3 agents, 4 commands.

  • Api design

    cipradu/Agent-Workbench/skills/api-design Skill

    0★ repo

    Portable skills, agents, and operating workflows for AI assistants.

  • Api contract governor

    satishTheLegend/api-contract-governor Skill

    0★

    Governs API evolution across producer and consumers: detects breaking changes, blocks them at the gate, and orchestrates a versioned deprecation lifecycle nobody can short-circuit.

  • Api design first

    vaibhavsaxena022/skills/api-design-first Skill

    0★ repo

    AI-agent skills for software engineering — works with Claude Code, Codex, Cursor

  • Go api design

    Gisellesleeveless396/go-agent-skills/skills/(architecture)/go-api-design Skill

    0★ repo

    Provide Go agent skills for cleaner, idiomatic code across Claude Code, Cursor, Copilot, and more with one install

  • Api contract validator

    lazymac2x/api-contract-validator-api/io.github.lazymac2x/api-contract-validator MCP server

    no license0★ repo

    Cloudflare Workers MCP server: api-contract-validator

  • Api design

    DevelopersGlobal/ai-agent-skills/skills/api-design Skill

    65★ repo

    AI agent skills for production grade applications

  • Api design

    OutlineDriven/odin-claude-plugin/skills/api-design Skill

    34★ repo

    Outline-Driven Development for Claude Code - 46 agents, 25+ skills, diagram-first methodology, AST-based editing, atomic commits.

  • Api design

    oribarilan/97/skills/api-design Skill

    no license23★ repo

    Agent skills distilled from the hard-won lessons of world-renowned programmers, in the spirit of "97 Things Every Programmer Should Know"

  • Java api review

    ducpm2303/claude-java-plugins/plugins/java-core/skills/java-api-review Skill

    no license17★ repo

    Java developer toolkit for Claude Code — skills, agents, hooks, and coding standards for Java 8+ projects

  • Api design

    s-hiraoku/synapse-a2a/.agents/skills/api-design Skill

    no license10★ repo

  • Api design

    viknesh20-20/claude-code-tool-kit/.claude/skills/api-design Skill

    7★ repo

    Production-ready Claude Code configuration. 12 original agents, 200+ slash-command skills, 45+ MCP servers, 14 plugins, design + 3D + WebGPU + GSAP + RAG tooling. One-command Node.js installer for premium websites, SaaS apps, AI agents. Free, MIT, stack-agnostic.

  • Component api design

    segunadebayo/design-eng-skills/skills/component-api-design Skill

    6★ repo

    Agent skills for design engineers: state machine design, component API design, engineering writing, changeset writing.

  • Api review

    pekral/cursor-rules/skills/api-review Skill

    5★ repo

    PHP and Laravel Cursor rules — coding standards, testing, and conventions for the Cursor editor. Install via Composer.

  • Api design

    aneja5/forge-skills/skills/api-design Skill

    3★ repo

    An assembly line for AI software development. 35 skills, 11 agent personas, 29 commands. From raw idea to shipped code.

  • Api design

    atuljha23/holocron/skills/api-design Skill

    2★ repo

    Role-aware Claude Code plugin: 10 specialist agents (frontend, backend, QA, a11y, perf, security, architect, debugger, code-reviewer, docs), 15 domain commands, 8 skills, and a SQLite-backed learning crystal that compounds your corrections across sessions.

  • Skill api design

    saitarrun/sdlc-ai-workflow/skills/skill-api-design Skill

    no license2★ repo

    A comprehensive Claude Code plugin that automates the complete Software Development Lifecycle with 20 role-specific agents, 12 knowledge skills, and 8 commands, all guided by principles.

  • Api contract generation

    ajaygodbole7/rest-api-skill/skills/api-contract-generation Skill

    no license2★ repo

    Zalando RESTful API Guidelines reformatted as Agent Skills for AI coding agents

  • Imlazy api design

    hnikoloski/imlazy/skills/imlazy-api-design Skill

    2★ repo

    Token-efficient tier-routed agent orchestrator 40+ skills, 19 agents, Obsidian vault. Works with Claude Code, OpenCode, Codex CLI.

  • Truestack api design

    adtn0810/truestack/skills/truestack-api-design Skill

    2★ repo

    Honesty-first coding skill set for Claude Code — 21 skills behind an orchestrate router with an enforced governance gate, a code↔memory tally, and auto-research. Built for self-hosted work.

  • Api design

    furkangonel/cowrangler/bundled_skills/api-design Skill

    2★ repo

    Autonomous terminal AI agent for workflows and feasible project procedures. Co-Worker Co-Wrangler 🐙

  • Api design

    MartinOlivero/saas-builder/skills/api-design Skill

    1★ repo

    Build a complete, secure SaaS end to end in Claude Code: prevention-first security (not audit), real Stripe payments (not just a catalog), and 15 lifecycle skills. Pairs with Superpowers — needs nothing else.

  • Api design

    medy-gribkov/arcana/skills/api-design Skill

    1★ repo

    Universal AI development toolkit. 74 production-ready skills for every coding agent. Works with Claude Code, Cursor, Codex.

  • Api design

    pvnarp/agent-skills/skills/api-design Skill

    1★ repo

    Skills I use with Claude Code across my projects. Architecture, code review, testing, security, deployment, and more.

All 476 in the catalog