test-driven-development

1## Non-Negotiable Rules
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3- Always use run mode (`CI=true npm test` or `--run` flag)
4- NEVER use watch mode (prevents hanging processes)
5- Use timeout guards (`timeout 60s`) as backup
6- Record exit codes as evidence at each phase
7- If tests fail 3 consecutive times in GREEN, report failure status
8- Never skip RED phase (failing test must exist before implementation)
9- Never defer tests to "later" -- TDD means tests first
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11## Scope Discipline
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13- If implementation requires >3 file changes, flag for scope review
14- Architectural choices require user approval unless pre-approved in plan
15- New dependencies require user approval
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17## When to Use
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19- Every feature implementation in BUILD workflow
20- Every bug fix in DEBUG workflow (regression test)
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22## Agents Used
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24- `component-builder` (primary consumer)
25- `bug-investigator` (regression tests)