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awesome-claude-code-toolkit/commands/testing/tdd.md
Rohit Ghumare 79573df7cb Initial release: 100-file Claude Code toolkit
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Start a TDD (Test-Driven Development) cycle for the requested feature or function.

Process

1. Red Phase - Write a Failing Test

  • Ask what behavior to implement if not specified.
  • Identify the test framework in use (Jest, Vitest, pytest, Go testing).
  • Write a single focused test that describes the desired behavior.
  • Run the test to confirm it fails for the right reason.
  • The test should fail because the feature does not exist yet, not because of a syntax error.

2. Green Phase - Make It Pass

  • Write the minimum code necessary to make the test pass.
  • Do not optimize or generalize yet. Just make it work.
  • Run the test to confirm it passes.
  • If it fails, fix the implementation, not the test.

3. Refactor Phase - Clean Up

  • Look for duplication, unclear naming, or unnecessary complexity.
  • Extract helper functions if logic is repeated.
  • Improve variable and function names for clarity.
  • Run the full test suite to verify nothing broke.

4. Repeat

  • Ask what the next behavior to implement is.
  • Start another Red-Green-Refactor cycle.

Rules

  • Each cycle targets exactly one behavior. Do not batch multiple behaviors.
  • Tests must be independent and not depend on execution order.
  • Use descriptive test names: should <expected behavior> when <condition>.
  • Mock external dependencies (HTTP, database, filesystem) at boundaries.
  • Keep each cycle under 5 minutes of implementation time.
  • If a cycle takes longer, the scope is too large. Break it down.