Total 30,646 skills, Backend Development has 3001 skills
Showing 12 of 3001 skills
Use when querying data with Ecto.Query DSL including where clauses, joins, aggregates, preloading, and query composition. Use for building flexible database queries in Elixir applications.
Use when designing GraphQL schemas with Absinthe. Covers type definitions, interfaces, unions, enums, and schema organization patterns.
Ruby and Rails best practices for services, testing, and architecture. Use when: - Writing or reviewing Ruby/Rails code - Designing service objects or organizing business logic - Setting up RSpec tests with FactoryBot - Building APIs with JSON serialization - Optimizing Rails performance (N+1, caching) Keywords: Ruby, Rails, RSpec, FactoryBot, service object, strong params, N+1 query, Sidekiq, RuboCop, Thor CLI
Use when working with Ruby metaprogramming features including dynamic method definition, method_missing, class_eval, define_method, and reflection.
Use when Rust async programming with tokio, async/await, and futures. Use when writing asynchronous Rust code.
Master Python asynchronous programming with asyncio, async/await, and concurrent.futures. Use for async code and concurrency patterns.
Run /check-stripe, then fix the highest priority Stripe issue. Creates one fix per invocation. Invoke again for next issue. Use /log-stripe-issues to create issues without fixing.
Use when implementing GraphQL resolvers with resolver functions, context management, DataLoader batching, error handling, authentication, and testing strategies.
Use when implementing compile-time metaprogramming in Crystal using macros for code generation, DSLs, compile-time computation, and abstract syntax tree manipulation.
Idiomatic Rust patterns for ownership, errors, traits, and configuration. Use when: - Writing or reviewing Rust code - Designing error handling with Result and thiserror - Implementing traits and composition patterns - Working with ownership and borrowing - Configuring Cargo features Keywords: Rust, ownership, borrowing, Result, thiserror, anyhow, trait, lifetimes, Cargo features, unsafe
Database design specialist for schema modeling, query optimization, indexing strategies, and data integrityUse when "database design, schema, indexes, query optimization, migrations, normalization, database scaling, foreign keys, data modeling, database, sql, postgres, mysql, mongodb, schema, indexes, migrations, normalization, optimization" mentioned.
Idiomatic Go patterns for errors, interfaces, concurrency, and packages. Use when: - Writing or reviewing Go code - Designing interfaces or package structure - Implementing concurrency patterns - Handling errors and context propagation - Structuring Go projects Keywords: Go, golang, error wrapping, interface design, goroutine, channel, context, package design, dependency injection, race condition