TC
Test Case Writer
🔵 Stable🕐 updated 2026-06-30
🔷 SkillSpec L3
pm-qa
Turn a requirement or user story into clear, executable test cases. Use when asked to write test cases, test scenarios, a test suite for a feature, or to derive tests from acceptance criteria. Produces structured test cases — preconditions, steps, test data, expected results — across happy path, edge cases, and negative cases, plus a coverage note, so a tester (or automation) can run them without guessing.
What to give it
▸The requirement — the feature/user story and its acceptance criteria.
▸Inputs & rules — fields, valid/invalid values, limits, and business rules that define correct behaviour.
▸Scope & environment — UI/API/both, platforms, and any preconditions (logged-in, data state).
▸Priority — what matters most (critical paths), so cases can be ordered.
✅ The bar it holds itself to
Every skill in this library self-verifies — these are this skill's own quality checks, straight from its definition.
✓Each case has clear preconditions, numbered steps, the test data, and a single expected result
✓Steps are unambiguous — two testers would execute them identically
✓Coverage includes edge/boundary and negative cases, not just the happy path
✓Cases trace back to the acceptance criteria / requirement (coverage note)
✓Cases are prioritised so the critical paths are obvious
✓Expected results are specific and verifiable (not "works correctly")
⚠️ What it refuses to do
Do not write only happy-path cases — the bugs live in the edges and negatives
Do not write vague steps ("test the login") — give the exact actions and data
Do not use unverifiable expected results ("it should work") — state the observable outcome
Do not combine many checks into one bloated case — keep cases atomic and traceable
Do not skip preconditions/test data — they're why a case is reproducible
Install
npx pm-claude-skills add --agent claude # or codex · cursor · gemini · hermes
# or one-line MCP (every skill, any client):
claude mcp add pm-skills -- npx -y pm-claude-skills-mcpRelated skills
🔌 Embed this skill
Drop this on your blog, docs, or site — it renders a "Run this skill" card:
<div data-pm-skill="test-case-writer"></div>
<script src="https://mohitagw15856.github.io/pm-claude-skills/embed.js" async></script>💬 Discussion
Test Case Writer is one of 743 open-source professional AI agent skills — all SkillSpec L3.
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