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Industry-standard Jest testing setup for TypeScript projects with guidance for React Testing Library, ts-jest, snapshots, and coverage configuration.
Provides a complete, practical guide to using Jest with TypeScript: configuration (ts-jest), recommended tsconfig/test settings, test patterns (unit, integration, snapshots), mocking strategies, and coverage setup. Includes examples for React Testing Library, timer mocks, and migration tips from Vitest.
Use this skill when you need to add or standardise testing in a TypeScript codebase, especially React or Node projects. Ideal for onboarding tests, setting coverage thresholds for CI, migrating from Vitest, or adding snapshot and integration testing.
Best consumed by developer-focused code assistants (Claude Code, Copilot-style agents) or CI automation tooling that can edit project config and run tests.
Comprehensive Jest + TypeScript reference skill covering setup, mocking, React Testing Library integration, snapshot testing, coverage, and Vitest migration. No scripts to execute — purely a documentation/reference skill. Well-structured with progressive disclosure frontmatter and thorough code examples throughout.
Clean reference skill from mattnigh/skills_collection. No security concerns whatsoever — no scripts, no network calls, no destructive patterns. Solid quality but not exceptional — comprehensive coverage of Jest/TS patterns with good examples and pitfalls sections.
API Versioning
Guidance and templates for designing API versioning strategies, managing breaking changes, and running deprecation/migration workflows.
Supabase Expert
Comprehensive Supabase expert with access to 2,616 official documentation files covering PostgreSQL database, authentication, real-time subscriptions, storag...
Celery
Distributed task queue system for Python enabling asynchronous execution of background jobs, scheduled tasks, and workflows across multiple workers with Djan...
Test Orchestrator
Coordinate test strategy, automation, and quality gates across unit, integration, E2E and performance tests for a component or service.
Cloudflare D1 Migrations & Production Seeding
Manage Cloudflare D1 schema, create append-only migrations with Wrangler, and safely seed data across dev, staging, and production environments.
Bundle Optimization
Practical patterns to dramatically reduce frontend bundle size: icon manifests, named imports, dynamic imports, and CI size checks.
Development Worktree
Create an isolated git worktree for feature work, auto-run project setup, and verify a clean test baseline before development.
Full Stack Builder
End-to-end builder that scaffolds, implements, tests, and optionally deploys web and API applications from a natural-language specification.
Airtable Custom Interface Extensions (SDK Reference)
A concise SDK reference and best-practices guide for building Airtable Interface Extensions using @airtable/blocks/interface — includes scaffolding, hooks, comm
Supabase SDK Patterns (TypeScript & Python)
Production-ready patterns for using Supabase clients in TypeScript and Python: client initialization, typed queries, auth, realtime, storage, RPC, and error-han
Klaviyo — Webhooks & Events
Patterns and reference code to receive, verify (HMAC-SHA256), route, and idempotently process Klaviyo webhook events in production services.
React Context Setup
Automates guidance and code patterns for setting up React Context, providing step-by-step configuration and best-practice examples for frontend projects.
Anima Rate Limits
Patterns and code for throttling Anima API code-generation calls, batching node processing, and handling 429s with progressive backoff for design-system scale w
Langfuse — Multi-Environment Setup
Guides safe Langfuse setup across development, staging, and production: per-environment API keys, secret management, CI/CD integration, and environment-specific