anima

Associations, validations, queries, migrations, eager loading, N+1 queries, scopes, callbacks, app/models/, db/migrate/.

2D game development — game loops, sprites, input, collisions, scenes, DRGTK, args.outputs/state/inputs.

Decorator patterns for Rails views — presentation logic separated from models, *_decorator.rb, app/decorators/.

Ruby MCP server development — tools, prompts, resources, transport, the mcp gem, LLM tool integrations.

Terminal UI development — widgets, layouts, events, Tea MVU, terminal rendering.

Testing with FactoryBot — matchers, test doubles, shared examples, describe/it/expect blocks, *_spec.rb files, test strategy.