Explorar skills

Structure Python projects with pyproject.toml, src layout, modern package managers (uv, rye, poetry), virtual environments, __init__.py, and namespace packages. Use when the user creates a new Python project, asks about project layout, configures packaging, sets up dependencies, or encounters import issues. Trigger when you see a Python project without proper structure.

Patterns for MCP resources including URIs, templates, subscriptions, dynamic resources, context provision, and MIME types. Use when the user is exposing data as MCP resources, designing resource URIs, implementing resource templates with parameters, setting up resource subscriptions, or providing context to Claude through resources.

Guide for database schema migrations with zero-downtime patterns, rollback strategies, data migrations, and migration testing. Use when the user writes database migrations, asks about schema changes in production, needs zero-downtime migration patterns, or plans rollback strategies. Trigger whenever database migration, schema change, or ALTER TABLE in production is discussed.

Apply structured debugging techniques to find and fix bugs efficiently. Use when the user reports a bug, encounters unexpected behavior, says something is "not working", or asks for help debugging. Apply hypothesis-driven debugging instead of random changes.

Express.js error handling patterns including async error catching, custom error classes, centralized error middleware, and the distinction between operational and programmer errors. Use when the user is handling errors in Express, writing async route handlers, creating custom error types, or debugging unhandled rejections. Trigger on mentions of Express error handling, async errors, error middlewa

Spring Boot patterns including stereotype annotations, dependency injection, profiles, configuration properties, and actuator endpoints. Use when the user is building Spring Boot applications, configuring dependency injection, setting up profiles for different environments, using @ConfigurationProperties, or enabling actuator health checks. Trigger on any mention of Spring Boot, @Component, @Servi

Guide for optimizing SQL queries with EXPLAIN ANALYZE, index tuning, N+1 detection, covering indexes, and query plan analysis. Use when the user has slow database queries, asks about query performance, needs to interpret EXPLAIN output, or wants to eliminate N+1 queries. Trigger whenever query performance, slow queries, or database optimization is discussed.

Express middleware chain patterns including auth middleware, error middleware, rate limiting, CORS configuration, and request validation. Use when the user is building Express.js APIs, configuring middleware, implementing authentication guards, adding rate limiting, or setting up CORS. Trigger on any mention of Express middleware, request pipeline, auth guards, rate limiting, or Express CORS.

Ready-to-use hook recipes for common Claude Code automation: prettier on edit, tsc check, console.log warning, git push review, doc blocker. Use when the user wants a specific hook example, asks "how do I auto-format" or "block markdown creation", or needs a hook for a common development workflow.

RESTful API design conventions for Node.js including resource naming, pagination, filtering, sorting, HATEOAS links, versioning, and content negotiation. Use when the user is designing REST APIs, asking about pagination or filtering patterns, implementing API versioning, or building CRUD endpoints. Trigger on mentions of REST API design, API pagination, query parameters, HATEOAS, API versioning, o

Enforce conventional commits format with proper types, scopes, and breaking change notation. Use when the user is committing code, writing commit messages, asks about commit format, or when you are about to create a git commit. Always apply this skill before running git commit.

JUnit 5 testing patterns including annotations, Mockito mocking, Spring Boot test slices, MockMvc, Testcontainers integration, and parameterized tests. Use when the user is writing Java tests, setting up test infrastructure, mocking dependencies, testing Spring controllers, or running integration tests with real databases. Trigger on any mention of JUnit, Mockito, @SpringBootTest, MockMvc, Testcon