Test-Driven Development

Overview

Enforces the TDD discipline in all CC10X BUILD workflows. The RED-GREEN-REFACTOR cycle is mandatory and cannot be skipped or deferred.

TDD Cycle

1. RED: Write failing test first. Run with CI=true npm test or --run flag. Exit code MUST be 1.
2. GREEN: Write minimal code to make test pass. Exit code MUST be 0.
3. REFACTOR: Clean up implementation while keeping tests green. Exit code MUST remain 0.

Non-Negotiable Rules

• Always use run mode (CI=true npm test or --run flag)
• NEVER use watch mode (prevents hanging processes)
• Use timeout guards (timeout 60s) as backup
• Record exit codes as evidence at each phase
• If tests fail 3 consecutive times in GREEN, report failure status
• Never skip RED phase (failing test must exist before implementation)
• Never defer tests to "later" -- TDD means tests first

Scope Discipline

• If implementation requires >3 file changes, flag for scope review
• Architectural choices require user approval unless pre-approved in plan
• New dependencies require user approval

When to Use

• Every feature implementation in BUILD workflow
• Every bug fix in DEBUG workflow (regression test)

Agents Used

• component-builder (primary consumer)
• bug-investigator (regression tests)