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Found 4,048 Skills
Show that code works with evidence instead of guesswork. Define contracts and invariants, add observability, run deterministic checks, and save artifacts that show what passed and what failed.
Use when writing, reviewing, or refactoring code, or scaffolding a new project. Language-agnostic principles (types encode invariants, parse don't validate, errors as values, no mocks, earn abstractions) with dialects for Rust, TypeScript, Go, and Python.
Write functional tests for Symfony controllers and HTTP endpoints using WebTestCase, getContainer, loginUser, and DAMA rollback
Create test data with Zenstruck Foundry v2 factories (PersistentObjectFactory, real objects); define states, sequences, and relationships