Claude Code Skills

Engineering best-practice skills for Claude Code — Go, TypeScript, Python, React, Angular, Next.js, NestJS, and Database (Redis, PostgreSQL).

Skills

Go

| Skill | Description | |-------|-------------| | golang-language | Naming, interfaces, package layout, anti-patterns | | golang-error-handling | ErrorX sentinel pattern, errno directory, error propagation by layer | | golang-logging | Zap Sugar API, log.W(ctx) context propagation, per-layer logging rules | | golang-architecture | Clean Architecture layers (handler→biz→store→model) and Google Wire DI | | golang-testing | Ginkgo BDD suites, Gomega matchers, uber-go/mock, DescribeTable, benchmarks | | golang-api-server | Framework-agnostic Server interface, graceful shutdown, unified response | | golang-gin | Gin engine setup, middleware chain, route groups, HandleJSONRequest pattern | | golang-echo | Echo framework patterns — binding, middleware, error handler | | golang-fiber | Fiber/fasthttp patterns — UserContext, BodyParser, concurrency gotchas | | golang-nethttp | net/http + chi router patterns — standard library HTTP server | | golang-makefile | Layered include structure, version injection from git, tools auto-install, ##@ help | | golang-app | cobra command setup, pflag options, viper config loading, Options→Config pipeline | | golang-database | GORM setup, connection pool, IStore interface, context-based TX propagation, concrete store |

TypeScript

| Skill | Description | |-------|-------------| | typescript-language | Strict config, type patterns, no-any/enum/!, brand types | | typescript-best-practices | Async/await, Promise.all, error handling at boundaries, DI patterns | | typescript-tooling | ESLint flat config, Prettier, tsup bundling, tsc in CI, pre-commit hooks | | typescript-security | Input validation (Zod), XSS/injection prevention, auth principles, CORS |

Python

| Skill | Description | |-------|-------------| | python-language | uv + ruff + pyright toolchain, naming, type hints, StrEnum, anti-patterns | | python-architecture | Layered architecture, SQLAlchemy 2.x async, FastAPI Depends() DI, Alembic | | python-error-handling | AppError hierarchy, global exception handlers, propagation by layer | | python-logging | loguru setup, context binding with contextualize(), per-layer logging rules | | python-testing | pytest, parametrize, fixtures, AsyncMock, respx, asyncio_mode=auto | | python-async | async/sync choice, asyncio.gather vs TaskGroup, blocking traps, to_thread | | python-fastapi | lifespan, routers, Pydantic schemas, Depends() chains, middleware | | python-data | Pandas ETL patterns, iterrows anti-pattern, chunked processing, Polars | | python-cli | Typer app, Argument vs Option, subcommands, StrEnum choices, progress bar |

React (frontend)

| Skill | Description | |-------|-------------| | react-language | JSX, hooks rules, derived state, useCallback/useMemo, Suspense, Error Boundary | | react-patterns | Feature-based structure (bulletproof-react), custom hooks, compound components | | react-forms | react-hook-form + Zod validation, Controller, server errors, FormArray | | react-state | Zustand for client state, TanStack Query for server state, query keys | | react-testing | Vitest + React Testing Library + MSW, userEvent, async queries | | cypress-e2e | E2E testing — data-cy selectors, Custom Commands, cy.intercept, fixtures |

Angular (frontend)

| Skill | Description | |-------|-------------| | angular-language | Standalone components, Signals, @if/@for control flow, inject() function | | angular-services | DI, HttpClient, functional interceptors, functional route guards | | angular-forms | Typed Reactive Forms, nonNullable group, FormArray, Signal integration | | angular-testing | Jest + TestBed, ComponentFixture, setInput(), HttpTestingController |

Next.js (frontend)

| Skill | Description | |-------|-------------| | nextjs-app-router | app/ structure, route groups, layouts, Server vs Client Components | | nextjs-data | Server Actions, fetch caching, revalidatePath, TanStack Query, next/image | | nextjs-api | Route Handlers, middleware, Auth.js, environment variable conventions |

NestJS (nodejs)

| Skill | Description | |-------|-------------| | nestjs-architecture | Module system, controllers, providers, DI, project structure | | nestjs-guards | Guards, Interceptors, ValidationPipe (class-validator), Exception Filters | | nestjs-testing | Test.createTestingModule(), mock providers, supertest E2E | | nestjs-database | Prisma integration, repository pattern, transactions, migrations |

Database

| Skill | Description | |-------|-------------| | database-redis | Redis key design, caching patterns, data structures, distributed lock, rate limiter | | database-postgres | Schema design, indexing, transactions, zero-downtime migrations (Expand-Contract) |

Install

Shell script (no dependencies)

git clone https://github.com/shipengqi/skills
cd skills

# Install all
bash install.sh

# Install specific skills
bash install.sh react-language react-state nestjs-architecture

# List status
bash install.sh list

npx

# Install all
npx @shipengqi/claude-skills add --all

# Install specific
npx @shipengqi/claude-skills add react-language

# List
npx @shipengqi/claude-skills list

# Remove
npx @shipengqi/claude-skills remove react-language

Claude Plugin Marketplace

claude plugin add https://github.com/shipengqi/skills

Benchmark

npm run benchmark

Generates benchmarks/benchmark-report.md with token counts, cost estimates per model, and quality scores for all skills.

How It Works

Each skill is a directory with a SKILL.md file that Claude Code loads automatically based on trigger conditions (e.g., presence of go.mod, *.tsx files). Skills symlink from the repo into ~/.claude/skills/.

After installing, restart Claude Code to load the new skills.