Expert guidance for Next.js Cache Components and Partial Prerendering (PPR). Use when implementing 'use cache' directive, configuring cache lifetimes with cacheLife(), tagging…
Use when tasks involve reading, creating, or reviewing PDF files where rendering and layout matter; prefer visual checks by rendering pages (Poppler) and use Python tools such as…
Build scalable design systems with design tokens, theming infrastructure, and component architecture patterns.
Complete browser automation with Playwright. Auto-detects dev servers, writes clean test scripts to /tmp.
Use when setting up a secure email inbox for any AI agent — configuring inbound email via Resend, webhooks, tunneling for local development, and implementing security measures to…
Use when legacy prompts or older framework flows reference `remotion-best-practices` and you need the modern runtime to resolve that capability cleanly.
Complete browser automation with Playwright. Auto-detects dev servers, writes clean test scripts to /tmp.
Use when receiving emails with Resend - setting up inbound domains, processing email.received webhooks, retrieving email content/attachments, or forwarding received emails.
Turn a PRD into a multi-phase implementation plan using tracer-bullet vertical slices, saved as a local Markdown file in ./plans/.
Master Bash Automated Testing System (Bats) for comprehensive shell script testing. Use when writing tests for shell scripts, CI/CD pipelines, or requiring test-driven development…
Migrate test files from `as` type assertions to @total-typescript/shoehorn. Use when user mentions shoehorn, wants to replace `as` in tests, or needs partial test data.
Use when implementing any feature or bugfix where correctness matters - before writing implementation code.
MANDATORY: Run appropriate validation tools after EVERY code change. Do not finish a task until the code is error-free.
Expert integration of Supabase Auth with Next.js App Router Use when: supabase auth next, authentication next.js, login supabase, auth middleware, protected route.
Expert guidelines for building performant animations with Motion (formerly Motion One) vanilla JavaScript animation library
Sets up an `## Agent skills` block in AGENTS.md/CLAUDE.md and `docs/agents/` so the engineering skills know this repo's issue tracker (GitHub or local markdown), triage label…
Vitest fast unit testing framework powered by Vite with Jest-compatible API. Use when writing tests, mocking, configuring coverage, or working with test filtering and fixtures.
Break a plan, spec, or PRD into independently-grabbable GitHub issues using tracer-bullet vertical slices.
Provides comprehensive NestJS best practices including modular architecture, dependency injection scoping, exception filters, DTO validation with class-validator, and Drizzle ORM…
Step up one layer of abstraction and surface a map of relevant modules and callers when the local view is too narrow.
Explore a codebase to find opportunities for architectural improvement, focusing on making the codebase more testable by deepening shallow modules.
Transform code reviews from gatekeeping to knowledge sharing through constructive feedback, systematic analysis, and collaborative improvement.
Use when new translation keys are added to packages to generate new translations strings
Base UI reference and workflows for @base-ui/react (unstyled, accessible React components, composition utilities, and form helpers).
Use when sending transactional emails (welcome messages, order confirmations, password resets, receipts), notifications, or bulk emails via Resend API.
Build production-ready design systems with Tailwind CSS, including design tokens, component variants, responsive patterns, and accessibility.
Turn the current conversation context into a PRD and submit it as a GitHub issue. Use when user wants to create a PRD from the current context.
Extract a DDD-style ubiquitous language glossary from the current conversation, flagging ambiguities and proposing canonical terms. Saves to UBIQUITOUS_LANGUAGE.md.
Master advanced prompt engineering techniques to maximize LLM performance, reliability, and controllability.
Set up Husky pre-commit hooks with lint-staged (Prettier), type checking, and tests in the current repo.
Best practices for building Stripe integrations. Use when implementing payment processing, checkout flows, subscriptions, webhooks, Connect platforms, or any Stripe API…
Next.js best practices - file conventions, RSC boundaries, data patterns, async APIs, metadata, error handling, route handlers, image/font optimization, bundling
Adversarial quality audit loop. Critic finds issues, fixer applies fixes, loops until APPROVED (max 5 rounds). Works with any document format.
Grilling session that challenges your plan against the existing domain model, sharpens terminology, and updates documentation (CONTEXT.md, ADRs) inline as decisions crystallise.
Navigate Supabase database tables, relationships, and query patterns. Use when you need to understand how tables connect, write queries, or find the right data source.
Next.js 16 Cache Components - PPR, use cache directive, cacheLife, cacheTag, updateTag
Turborepo monorepo build system guidance. Triggers on: turbo.json, task pipelines, dependsOn, caching, remote cache, the "turbo" CLI, --filter, --affected, CI optimization,…
Send transactional or notification emails via the Resend API — text and HTML content, multiple recipients, CC/BCC, reply-to, and file attachments.
Deep expertise in Next.js App Router patterns including route groups, parallel routes, intercepting routes, layouts, and loading states.
Use when designing interfaces for dashboards, admin panels, SaaS apps, tools, and interactive products. NOT for marketing design (landing pages, marketing sites, campaigns).
Create a detailed refactor plan with tiny commits via user interview, then file it as a GitHub issue.
Create well-formatted commits with conventional commit messages and emoji
Inngest expert for serverless-first background jobs, event-driven workflows, and durable execution without managing queues or workers.
Comprehensive guidance for mastering TypeScript's advanced type system including generics, conditional types, mapped types, template literal types, and utility types for building…
Comprehensive guidance for building scalable, maintainable, and production-ready Node.js backend applications with modern frameworks, architectural patterns, and best practices.
Architecture patterns for multi-stage CI/CD pipelines with approval gates and deployment strategies.
Production-ready GitHub Actions workflow patterns for testing, building, and deploying applications.
Grilling session that challenges your plan against the existing domain model, sharpens terminology, and updates documentation (CONTEXT.md, ADRs) inline as decisions crystallise.
This skill encodes Emil Kowalski's philosophy on UI polish, component design, animation decisions, and the invisible details that make software feel great.