Software Development Skills

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 prevent prompt injection attacks. Also use when someone mentions 'agent email', 'bot inbox', 'receive emails for agent', 'agent webhook', 'email security for AI', 'prompt injection via email', 'inbound email for bot', or wants their AI agent to receive and respond to emails securely.

Tasteful, subtle web UI animation following Emil Kowalski / animations.dev principles. Use when adding or reviewing interface motion — hover and press feedback, entrances and exits, modals, toasts, menus, loading and skeleton states, staggered reveals, page or view transitions — so motion stays refined and purposeful, not decorative. Covers CSS, Web Animations, and React timing/easing. Pair with the motion skill for motion/react API specifics.

Base UI reference and workflows for @base-ui/react (unstyled, accessible React components, composition utilities, and form helpers). Use when implementing Base UI components, portals, styling/state hooks, render-prop composition, eventDetails customization, animations, forms/validation, TypeScript typing, CSP/RTL utilities, or checking Base UI docs, issues, or releases.

Master Bash Automated Testing System (Bats) for comprehensive shell script testing.

Complete guide for building accessible, high-UX forms in modern stacks (React/Next.js, Tailwind, Zod). Includes specific patterns for clickable areas, range sliders, output-inspired design, and WCAG compliance.

Expert guidance for Next.js Cache Components and Partial Prerendering (PPR). Use when implementing 'use cache' directive, configuring cache lifetimes with cacheLife(), tagging cached data with cacheTag(), invalidating caches with updateTag()/revalidateTag(), optimizing static vs dynamic content boundaries, managing 'use cache: private' for compliance scenarios, pass-through/interleaving patterns, GET Route Handler caching, debugging cache issues, and reviewing Cache Component implementations.

Transform code reviews from gatekeeping to knowledge sharing through constructive feedback, systematic analysis, and collaborative improvement.

Create well-formatted commits with conventional commit messages and…

Architecture patterns for multi-stage CI/CD pipelines with approval gates and deployment strategies.

Build scalable design systems with design tokens, theming infrastructure, and component architecture patterns. Use when creating design tokens, implementing theme switching, building component libraries, or establishing design system foundations.

Grilling session that challenges your plan against the existing domain model, sharpens terminology, and updates documentation (CONTEXT.md, ADRs) inline as decisions…

This skill encodes Emil Kowalski's philosophy on UI polish, component design, animation decisions, and the invisible details that make software feel great.

Use when new translation keys are added to packages to generate new translations…

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…

Explore a codebase to find opportunities for architectural improvement, focusing on making the codebase more testable by deepening shallow modules.

Inngest expert for serverless-first background jobs, event-driven workflows, and durable execution without managing queues or workers.

Use when designing interfaces for dashboards, admin panels, SaaS apps, tools, and interactive products. NOT for marketing design (landing pages, marketing sites, campaigns). Use this whenever the user wants to build or improve an app interface, design a dashboard, create settings pages, or style data-heavy screens with craft and consistency.

MANDATORY: Run appropriate validation tools after EVERY code change. Do not finish a task until the code is error-free.

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.

Expert guidelines for building performant animations with Motion (formerly Motion One) vanilla JavaScript animation…

Provides comprehensive NestJS best practices including modular architecture, dependency injection scoping, exception filters, DTO validation with class-validator, and Drizzle ORM integration. Use when designing NestJS modules, implementing providers, creating exception filters, validating DTOs, or integrating Drizzle ORM within NestJS applications.

Next.js 16 Cache Components - PPR, use cache directive, cacheLife, cacheTag,…

Deep expertise in Next.js App Router patterns including route groups, parallel routes, intercepting routes, layouts, and loading states.