Use when implementing a code task so the test is written or updated before production code and proves the requested behavior.
Scanned 6/9/2026
Install via CLI
Skills Directoryopenskills install DYAI2025/Plumbline---
name: test-driven-development
description: Use when implementing a code task so the test is written or updated before production code and proves the requested behavior.
---
# Test-driven Development
## Red-Green-Refactor
1. Pick one REQ/task.
2. Write or update the smallest failing test first.
3. Run it and record the failing command/output.
4. Implement the minimum production change.
5. Run the targeted test, then the broader suite.
6. Refactor only with tests green.
Do not add production behavior that is not covered by a requirement or regression test.
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