Node.js

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.

nanoclaw-repl is a session-aware REPL skill for operating and extending NanoClaw v2. It supports persistent markdown-backed sessions, branching, search, compaction, model switching, and export for Workflow Automation. Use this nanoclaw-repl guide to keep local tasks deterministic and easy to resume.

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.

ecc-tools-cost-audit is an evidence-first audit skill for ECC Tools cost spikes, runaway PR creation, quota bypass, premium-model leakage, and duplicate jobs. Use it for Backend Development investigations that trace a request from webhook to worker to billing decision and prove where spend is being created.

ck is a Claude Code project memory skill for persistent context across sessions. It registers projects, auto-loads briefing data on start, and supports save, resume, info, list, forget, and migrate workflows through deterministic Node.js scripts. A strong fit for ck for Context Engineering.

The bun-runtime skill helps you choose Bun for new JavaScript or TypeScript projects, Node migration, scripts, tests, and Vercel setups. It covers bun-runtime usage, install guidance, Bun vs Node tradeoffs, and practical workflows for frontend and full-stack development.

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.

mcp-builder is a practical guide for planning, building, and evaluating MCP servers for external APIs and services. It helps developers choose tool scope, naming, transport, Python or Node implementation patterns, and evaluation workflows so agents can use the server reliably.

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.

setup-pre-commit helps you add Husky pre-commit hooks with lint-staged, Prettier, and optional typecheck/test runs. Use this setup-pre-commit guide when your repo needs a fast, repeatable pre-commit safety net and you want to preserve existing config while adding the right scripts for the current package manager.

nodejs-backend-patterns is a practical guide for building Node.js backend services with Express or Fastify, covering middleware, auth, error handling, repository layers, DI, caching, and database integration for production-minded APIs.

turborepo-caching helps configure Turborepo caching for faster monorepo builds, tests, and CI. Learn setup, remote caching, cache-safe outputs, env handling, and cache-miss debugging from the SKILL.md guidance.

monorepo-management helps plan and improve JS/TS monorepos with pnpm workspaces, Turborepo, and Nx. Use it for project setup, migrations, CI and build optimization, shared package strategy, and dependency management across multi-package repos.

nx-workspace-patterns helps design and refine Nx monorepos with practical workspace layout, library taxonomy, project boundaries, affected CI, and caching guidance for setup or migration.

nextjs-app-router-patterns helps developers plan Next.js 14+ App Router architecture, including Server Components, streaming, caching, route handlers, and Server Actions for full-stack development and Pages Router migrations.

dependency-upgrade is a skill for planning major dependency upgrades with semver review, compatibility analysis, staged rollout, and testing. Use it to audit npm or yarn packages, inspect dependency trees, resolve conflicts, and guide safer framework or library upgrades in Code Editing workflows.

appinsights-instrumentation helps instrument Azure-hosted web apps with Application Insights. It guides App Service auto-instrumentation or manual ASP.NET Core and Node.js setup, including connection string and IaC updates.

add-provider-package is a focused guide for creating a new @ai-sdk/<provider> package in vercel/ai. It helps contributors and API teams follow the AI SDK provider architecture, package structure, and implementation workflow when adding a provider.

chatgpt-apps is the skill for building or fixing ChatGPT Apps SDK projects that pair an MCP server with a widget UI. Use it for docs-aligned setup, tool design, bridge wiring, resource registration, metadata, CSP, and repo validation. It also supports chatgpt-apps for Backend Development when backend and UI must be designed together.

baoyu-post-to-weibo lets agents publish Weibo posts and headline articles through a real Chrome session. It supports text, images, video, Markdown-to-HTML conversion, clipboard paste helpers, and bun or npx-based execution for reliable posting workflows.

baoyu-markdown-to-html converts Markdown into styled HTML for WeChat-style publishing. It supports themes, code highlighting, math, PlantUML, footnotes, image handling, and optional link citations, with runtime execution through bun or npx -y bun.

baoyu-format-markdown formats plain text or messy Markdown into cleaner, publishable Markdown while preserving meaning. It repairs frontmatter, headings, lists, code blocks, quotes, and CJK spacing, making it useful for Format Conversion without rewriting content.

baoyu-danger-x-to-markdown converts X posts, threads, and some articles into Markdown with YAML front matter. It uses scripts in `scripts/` with `bun` or `npx -y bun`, supports cookie-based access and consent flow, and fits repeatable Format Conversion workflows better than a generic prompt.