other Skills

Every piece of mutable state has exactly one owner that writes it. Others read. Prevents "who set this?" and invisible coupling.

When to extract a module, what belongs together, what stays coupled. Prevents premature extraction and god modules alike.

Dependencies flow one direction. Shared state → domain logic → presentation. Never circular. Prevents import tangles and initializ...

TS/React: Business logic lives in pure modules. Not in React hooks. Not in closures. Not in callbacks. Prevents untestable, unreas...

TS: When something has one instance, use a module-level ref. Not a factory. Not a class. Not a closure. Prevents over-engineering...

Create your FastAPI skill in one prompt, then learn to improve it throughout the chapter

[40] PLAN. Create clear action plans with steps, success criteria, and risk awareness. Use before implementing features, making ch...

Creating algorithmic art using p5.js with seeded randomness and interactive parameter exploration. Use this when users request cre...

Use when building or reviewing core Quarkus applications with CDI beans and scopes, SmallRye Config and profiles, lifecycle, inter...

Use when you need to design, review, or improve REST APIs with Quarkus REST (Jakarta REST) — including resource classes, HTTP meth...

Create your ChatKit Server skill in one prompt, then learn to improve it throughout the chapter

Use when you need programmatic JDBC in Quarkus — Agroal DataSource, parameterized SQL, transactions, batching, and Dev Services. P...

Use when you need data access with Quarkus Hibernate ORM Panache — including PanacheEntity / PanacheEntityBase, PanacheRepository,...

Use when you need to add or review Flyway database migrations in a Quarkus application — quarkus-flyway extension, db/migration sc...

Create your OpenAI Apps SDK skill in one prompt, then learn to improve it throughout the chapter

Use when you need to write fast unit tests for Quarkus applications — including pure tests with @ExtendWith(MockitoExtension.class...

Use when you need to write or improve integration tests for Quarkus — including @QuarkusTest, Dev Services for automatic container...

Use when you need to implement acceptance tests from a Gherkin .feature file for Quarkus applications — including @acceptance scen...

Create your RAG skill in one prompt, then learn to improve it throughout the chapter

Create a relational-db-agent skill that knows SQLModel async patterns

Create a relational-db-agent skill that knows SQLModel async patterns

Create your agent-tdd skill in one prompt, then learn to improve it throughout the chapter

Create your agent-evals skill from official documentation before learning evaluation concepts. This skill-first approach ensures y...

Validate your agent-evals skill by testing it on a completely different agent. A skill proves its worth when it transfers beyond t...

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debug...

Transform Docker knowledge from Lessons 1-6 into a reusable AI skill for consistent, production-ready containerization

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through w...

Replace with description of the skill and when Claude should use it.

4claw — a moderated imageboard for AI agents. Boards, threads, replies, media uploads, bumping (bump=false to not bump), greentext...

Create 4D construction simulations by linking BIM elements to project schedules. Generate time-based visualizations, sequence anal...

Analyzes your recent Claude Code chat history to identify coding patterns, development gaps, and areas for improvement, curates re...

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debug...

World-class

create an initial PyTM-based threat model of your system by asking questions after the 4 Questions Framework

Brainstorms creative domain names for projects and checks availability across common TLDs (.com, .ai, .dev, .io, .app). Saves hour...

Optimize your SaaS app across four dimensions - Speed (page load, API response), Code (unused files, dead code), Database (orphane...

Fifth step in building instruction context for codebase

Root cause analysis for software bugs using the 5 Whys technique. Use when the user wants to find the underlying cause of a bug, e...

Performs ChIP-specific biological validation. It calculates metrics unique to protein-binding assays, such as Cross-correlation (N...

Reset after failures, blockers, or when stuck. Use when execution hits a wall, something breaks, or we need to step back and reass...

Visual verification loop combining Playwright video recording with video-explorer frame extraction for autonomous behavior debuggi...

[50] EXECUTE. Execute plans step-by-step with confirmation gates. Each step requires user approval before proceeding. Includes cha...

Create your Kubernetes deployment skill in one prompt, then learn to improve it throughout the chapter

You built your Kubernetes skill in Lesson 0 and refined it through Lessons 1-14. Now validate that it actually transfers to new pr...

Use when building or reviewing Micronaut applications — Micronaut.run bootstrap, @Singleton/@Prototype, @Factory beans, @Configura...

Use when you need to design, review, or improve REST APIs with Micronaut — including @Controller routes, HTTP status codes, DTOs,...

[51] EXECUTE. Commitment to maximum quality work with 150% coverage. Use when you need the highest quality output for critical tas...

Create your Helm chart skill in one prompt, then learn to improve it throughout the chapter