testing

Features and purpose

Test-first development process and test quality review. Use when writing new code, reviewing PRs, diagnosing flaky or failing tests, or improving test coverage. Also use when fixing bugs (write failing test first), adding features (test defines 'done'), or when tests pass but code doesn't work. Essential for TDD, test pyramid strategy, mocking decisions, AAA pattern, table-driven tests, and handling flaky tests.

Quick start

Follow the repository instructions for this skill and your agent. Review the files and dependencies before adding it to your workflow.