API Development

x-api helps you work with the X/Twitter API for posting, reading timelines, search, and basic analytics. It guides auth choices, endpoint selection, and request shape for API Development tasks, including bearer-token reads and OAuth 1.0a write flows.

swift-concurrency-6-2 helps you adopt Swift 6.2 Approachable Concurrency, fix data-race errors, and decide when to keep work on MainActor or offload with @concurrent. Use this swift-concurrency-6-2 guide for app and backend development migrations.

springboot-patterns helps you design Spring Boot backends with clear controller, service, and repository layers, plus validation, pagination, caching, async processing, profiles, and event-driven flows. Use it as a springboot-patterns guide for Backend Development when you need maintainable production patterns instead of ad hoc Spring code.

The nodejs-keccak256 skill helps you avoid a common Ethereum bug in JavaScript and TypeScript: using Node's sha3-256 when you need Keccak-256. It is useful for backend development, selectors, event topics, signatures, storage slots, and address derivation, with practical nodejs-keccak256 usage guidance.

nestjs-patterns is a practical NestJS architecture skill for building modular, production-grade TypeScript backends. It guides module structure, controller and service boundaries, DTO validation, guards, interceptors, config, testing, and the right way to organize code for maintainable Backend Development.

mcp-server-patterns is a practical guide for MCP Server Development with the Node/TypeScript SDK. Learn when to use tools, resources, prompts, Zod validation, and stdio vs Streamable HTTP, with current API notes for safer implementation and debugging.

laravel-plugin-discovery helps you discover and evaluate Laravel packages via LaraPlugins.io MCP. Use it to assess package health, check Laravel/PHP compatibility, and find options for API Development before you install.

laravel-patterns helps you design Laravel apps with cleaner boundaries: thin controllers, services or actions for business logic, predictable Eloquent data access, and practical patterns for queues, events, caching, and API resources. It is built for backend development teams that need maintainable production apps, not quick one-off scaffolding.

kotlin-ktor-patterns helps you build or refactor Ktor backends with routing DSL, plugins, authentication, Koin DI, kotlinx.serialization, WebSockets, and testApplication testing. Use this kotlin-ktor-patterns guide for maintainable Backend Development and clearer server structure.

kotlin-exposed-patterns is a practical guide for Kotlin database engineering with JetBrains Exposed. It covers DSL queries, DAO pattern, newSuspendedTransaction, HikariCP, Flyway migrations, and repository boundaries for maintainable data access.

jpa-patterns is a practical JPA/Hibernate guide for Spring Boot backend development. It covers entity design, relationships, query tuning, transactions, auditing, pagination, and pooling to help reduce ORM mistakes and improve persistence performance.

healthcare-cdss-patterns helps backend developers build deterministic CDSS logic for medication checks, dose validation, clinical scoring, and alert severity. It favors pure-function decision engines for EMR-adjacent workflows, making patient-safety rules easier to test, validate, and integrate.

foundation-models-on-device helps you build Apple FoundationModels features on iOS 26+ with on-device text generation, guided output with @Generable, tool calling, snapshot streaming, and availability checks for privacy-first apps.

evm-token-decimals helps prevent silent decimal mismatch bugs across EVM chains. Use it for runtime decimals lookup, chain-aware caching, bridged-token precision drift, and safe normalization for backend development, bots, dashboards, and DeFi tools.

django-patterns is a practical guide for Django architecture patterns, including DRF APIs, ORM usage, caching, signals, middleware, and split settings. It helps backend teams standardize project structure and build maintainable apps with fewer guesses.

claude-api helps with Anthropic Claude API patterns for Python and TypeScript, including install, messages, streaming, tool use, vision, batches, prompt caching, model selection, and Claude Agent SDK workflows.

backend-patterns is a backend development skill for Node.js, Express, and Next.js API routes. It helps with API design, repository/service/controller layering, validation, caching, background jobs, and database optimization so you can build cleaner server-side systems with less guesswork.

api-connector-builder helps you add a repo-native API connector or provider by matching the host repository’s existing integration pattern, wiring, tests, and conventions.

api-design is a REST API design skill for planning and reviewing endpoints, resource naming, status codes, pagination, filtering, versioning, and error responses.

android-clean-architecture helps structure Android and Kotlin Multiplatform apps with clear module boundaries, dependency rules, UseCases, Repositories, and data layer patterns.

agent-payment-x402 helps AI agents handle x402 payments with MCP tools, spending caps, recipient allowlists, and non-custodial wallets for paid APIs and agent orchestration.

claude-api is a practical skill for installing and using the Claude API and Anthropic SDKs. It helps developers choose the right SDK or raw HTTP path, detect language-specific docs, and implement streaming, tool use, files, batches, and error handling with less guesswork.

The fullstack-developer skill is a reusable prompt package for modern JavaScript and TypeScript web app work across React, Next.js, Node.js, APIs, databases, auth, and deployment. It is best for multi-layer planning and implementation, with a single SKILL.md file that defines scope and workflow rather than providing scripts or templates.

error-handling-patterns helps teams choose exceptions vs Result types, classify failures, propagate context, and design graceful degradation for more reliable APIs and services.