Claude Skills by sabahattink

REST API design, versioning, error responses, pagination, OpenAPI conventions. Use when designing new API endpoints, reviewing API contracts, or setting up Swagger/OpenAPI documentation.

JWT access/refresh tokens, Passport.js strategies, session management, OAuth. Use when implementing authentication, authorization, or setting up OAuth providers in a NestJS + Next.js app.

Backend architecture principles, layering, error handling, logging patterns for NestJS. Use when designing NestJS modules, writing service logic, structuring error handling, or setting up structured logging.

Structured brainstorming techniques, idea generation, trade-off analysis. Use when exploring design options, choosing between architectural approaches, generating feature ideas, or making technology decisions.

Code review checklist, what to look for, how to give feedback, PR review flow. Use when reviewing a pull request, or when preparing code for review.

Vercel frontend + Railway/Fly.io backend deployment, env vars, health checks. Use when deploying a Next.js frontend to Vercel or a NestJS backend to Railway or Fly.io, or troubleshooting a deployment issue.

Dockerfile best practices, multi-stage builds, docker-compose for dev/prod. Use when setting up containerization for a NestJS backend or Next.js frontend, or configuring a local dev environment with docker-compose.

Generating Word documents programmatically with docx library in Node.js. Use when generating .docx reports, contracts, invoices, or any structured Word document from data.

UI component design principles, visual hierarchy, spacing, typography for Next.js apps. Use when building or reviewing React/Next.js components, setting up design tokens, or establishing visual consistency.

Git branching strategy, commit messages, PR workflow, conflict resolution. Use when setting up a branching strategy, writing commit messages, creating pull requests, or resolving merge conflicts.

CI/CD workflow patterns, testing pipelines, deployment automation. Use when setting up GitHub Actions workflows for testing, building, linting, or deploying a fullstack app.

NestJS best practices, module architecture, DTOs, Guards, Interceptors, and common patterns. Use when building or reviewing NestJS backend services.

Next.js App Router best practices, Server Components, Server Actions, routing patterns, and data fetching strategies. Use when building Next.js applications with the App Router.

Generating PDFs with pdfkit or puppeteer in Node.js. Use when generating PDF reports, invoices, certificates, or any printable document from data or HTML templates.

Generating PowerPoint presentations with pptxgenjs in Node.js. Use when creating automated presentations, slide decks, pitch decks, or reports in .pptx format from data.

Prisma ORM best practices, schema design, migrations, seeding, and query optimization for PostgreSQL. Use when working with database schemas, migrations, or Prisma queries.

Comprehensive prompt engineering framework for designing, optimizing, and iterating LLM prompts. Use when creating prompts, optimizing existing prompts, or improving AI instructions.

React component patterns, hooks, state management, and performance best practices. Use when building or reviewing React components.

OWASP Top 10, input validation, SQL injection prevention, rate limiting, CORS. Use when reviewing code for security issues, setting up a new API, or doing a pre-deploy security audit.

How to create new skills for this HQ — format, frontmatter, content structure. Use when you need to add a new skill to this repository, or when reviewing whether an existing skill is well-formed.

System design patterns, Clean Architecture, SOLID principles, domain modeling. Use when making architectural decisions, designing new modules, refactoring a tangled codebase, or reviewing system design.

Debugging methodology, hypothesis testing, reading stack traces, isolating issues. Use when facing an unexpected bug, a flaky test, a production incident, or any situation where the cause isn't immediately obvious.

Tailwind CSS v4 patterns, component styling, dark mode, responsive design, and design system integration. Use when styling components or reviewing CSS.

TDD red-green-refactor cycle, test structure, mocking patterns for Vitest/Jest. Use when starting a new feature, fixing a bug, or refactoring — write the test first, then the implementation.

TypeScript type system patterns, generics, utility types, and strict mode best practices. Use when writing or reviewing TypeScript code.

Web design best practices, accessibility, responsive layout, color contrast. Use when auditing a UI for a11y compliance, designing responsive layouts, or establishing design standards across a web app.

Playwright E2E patterns, Testing Library component tests, test selectors. Use when writing browser tests, component tests, or setting up an E2E testing pipeline for a Next.js or React app.

Generating Excel files with xlsx/exceljs in Node.js. Use when generating .xlsx reports, data exports, dashboards, or spreadsheets from database data.