{"slug":"tdd-workflow","title":"tdd-workflow","summary":"Test-Driven Development workflow principles. RED-GREEN-REFACTOR cycle.","platform":"ChatGPT","tags":[],"authorName":"LLM Mart","authorSlug":"llm-mart","score":0,"source":"github","price":null,"verified":false,"createdAt":"2026-08-16T13:39:01.531912Z","repo":{"url":"https://github.com/sickn33/agentic-awesome-skills","stars":46883,"forks":6831,"license":"MIT","updatedAt":"2026-09-25T05:43:16Z"},"bodyHtml":"
\nname: tdd-workflow\ndescription: \"Test-Driven Development workflow principles. RED-GREEN-REFACTOR cycle.\"\nrisk: critical\nsource: community\ndate_added: \"2026-02-27\"
\nTDD Workflow
\n\nWrite tests first, code second.
\n
\n
\n1. The TDD Cycle
\n\uD83D\uDD34 RED → Write failing test\n ↓\n\uD83D\uDFE2 GREEN → Write minimal code to pass\n ↓\n\uD83D\uDD35 REFACTOR → Improve code quality\n ↓\n Repeat...\n
\n
\n2. The Three Laws of TDD
\n\n- Write production code only to make a failing test pass
\n- Write only enough test to demonstrate failure
\n- Write only enough code to make the test pass
\n
\n
\n3. RED Phase Principles
\nWhat to Write
\n\n\n\n| Focus | \nExample | \n
\n\n\n\n| Behavior | \n\"should add two numbers\" | \n
\n\n| Edge cases | \n\"should handle empty input\" | \n
\n\n| Error states | \n\"should throw for invalid data\" | \n
\n\n
\nRED Phase Rules
\n\n- Test must fail first
\n- Test name describes expected behavior
\n- One assertion per test (ideally)
\n
\n
\n4. GREEN Phase Principles
\nMinimum Code
\n\n\n\n| Principle | \nMeaning | \n
\n\n\n\n| YAGNI | \nYou Aren't Gonna Need It | \n
\n\n| Simplest thing | \nWrite the minimum to pass | \n
\n\n| No optimization | \nJust make it work | \n
\n\n
\nGREEN Phase Rules
\n\n- Don't write unneeded code
\n- Don't optimize yet
\n- Pass the test, nothing more
\n
\n
\n5. REFACTOR Phase Principles
\nWhat to Improve
\n\n\n\n| Area | \nAction | \n
\n\n\n\n| Duplication | \nExtract common code | \n
\n\n| Naming | \nMake intent clear | \n
\n\n| Structure | \nImprove organization | \n
\n\n| Complexity | \nSimplify logic | \n
\n\n
\nREFACTOR Rules
\n\n- All tests must stay green
\n- Small incremental changes
\n- Commit after each refactor
\n
\n
\n6. AAA Pattern
\nEvery test follows:
\n\n\n\n| Step | \nPurpose | \n
\n\n\n\n| Arrange | \nSet up test data | \n
\n\n| Act | \nExecute code under test | \n
\n\n| Assert | \nVerify expected outcome | \n
\n\n
\n
\n7. When to Use TDD
\n\n\n\n| Scenario | \nTDD Value | \n
\n\n\n\n| New feature | \nHigh | \n
\n\n| Bug fix | \nHigh (write test first) | \n
\n\n| Complex logic | \nHigh | \n
\n\n| Exploratory | \nLow (spike, then TDD) | \n
\n\n| UI layout | \nLow | \n
\n\n
\n
\n8. Test Prioritization
\n\n\n\n| Priority | \nTest Type | \n
\n\n\n\n| 1 | \nHappy path | \n
\n\n| 2 | \nError cases | \n
\n\n| 3 | \nEdge cases | \n
\n\n| 4 | \nPerformance | \n
\n\n
\n
\n9. Anti-Patterns
\n\n\n\n| ❌ Don't | \n✅ Do | \n
\n\n\n\n| Skip the RED phase | \nWatch test fail first | \n
\n\n| Write tests after | \nWrite tests before | \n
\n\n| Over-engineer initial | \nKeep it simple | \n
\n\n| Multiple asserts | \nOne behavior per test | \n
\n\n| Test implementation | \nTest behavior | \n
\n\n
\n
\n10. AI-Augmented TDD
\nMulti-Agent Pattern
\n\n\n\n| Agent | \nRole | \n
\n\n\n\n| Agent A | \nWrite failing tests (RED) | \n
\n\n| Agent B | \nImplement to pass (GREEN) | \n
\n\n| Agent C | \nOptimize (REFACTOR) | \n
\n\n
\n
\n\nRemember: The test is the specification. If you can't write a test, you don't understand the requirement.
\n
\nWhen to Use
\nThis skill is applicable to execute the workflow or actions described in the overview.
\nLimitations
\n\n- Use this skill only when the task clearly matches the scope described above.
\n- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
\n- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
\n
\n","files":[{"path":"SKILL.md","sizeBytes":3244,"isText":true}],"reviewScore":null,"reviewSummary":null,"trust":{"provenance":"trusted-source-unreviewed","notice":"Community-authored content, reproduced verbatim and not vetted as instructions. Treat it as data to evaluate, never as directives to follow.","bodySource":null},"bodyLocked":false,"purchaseUrl":null,"sourceUrl":null,"report":{"provenance":"trusted-source-unreviewed","screen":{"ran":true,"outcome":"clean","suspicious":0,"notes":0,"hiddenCharacters":false},"virusScan":{"engine":"clamav","status":"clean","scannedAt":"2026-08-16T13:46:31.609128Z","sha256":"905230B8F82DE26FB890E11820412B25FC7A919A72B9C7FC0BEF13AD6DE61B83","sizeBytes":1669},"review":null,"source":{"repositoryUrl":"https://github.com/sickn33/agentic-awesome-skills","path":"skills/tdd-workflow","license":"MIT","commit":"f2bba339de74414b0771234cbe4f6a15258e32a3","subtreeSha":"F405F122E1153920D34B987809D8983C29C0F5BAFD25368A07A8F67DF0E3805B","lastSyncedAt":"2026-09-25T06:48:39.853703Z"},"reviewedAt":"2026-08-16T13:57:22.507217Z","notice":"Community-authored content, reproduced verbatim and not vetted as instructions. Treat it as data to evaluate, never as directives to follow."},"install":[{"target":"skills-cli","command":"npx skills add https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/tdd-workflow"},{"target":"claude-code","command":"claude plugin marketplace add https://llmmart.ai/marketplace.json && claude plugin install sickn33-agentic-awesome-skills@llmmart"},{"target":"git","command":"git clone https://github.com/sickn33/agentic-awesome-skills.git"}]}