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tdd

Implement a feature or bug fix test-first when the user asks for red-green development or the change needs a regression seam.

Skill by Rafcin

IndexedMIT
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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/rafcin-tdd

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Implement a feature or bug fix test-first when the user asks for red-green development or the change needs a regression seam.

Use cases: testing, agent-building

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

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Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/tdd

What's inside

Skill name
tdd
Description
Implement a feature or bug fix test-first when the user asks for red-green development or the change needs a regression seam.
License
MIT
Instructions
21 lines in SKILL.md · view on GitHub

Files (1)

  • SKILL.md

SKILL.md (first lines)

# Test-Driven Development

## Entry conditions

Use for an observable behavior change, regression, or approved behavior seam. Work in small vertical slices through the public seam. Before production code, write one focused test whose expected value comes from the requirement, known-good example, or reproduced bug. Confirm its red result is missing behavior, not a typo, import error, or unrelated baseline failure.

## Scope limit

Implement only enough to make that test pass, rerun focused and neighboring tests, and refactor only while green. Do not test private helpers, duplicate implementation logic in expected values, use broad snapshots without a stable contract, or add speculative behavior. A fake belongs only at a genuine external boundary.

For a bug, minimize the reported symptom into the regression test. For configuration or generated artifacts, test the observable consumer contract.

## Exit evidence

Record red evidence, green evidence, focused and baseline checks, and a clean diff with no behavior beyond the tested requirement.

## Next gate

Hand the completed slice to `implement` for its route-level report, then `verification`; use changed-file anti-slop before review when OMCS requires it.

From Rafcin/oh-my-codex-slim, MIT.

More from Rafcin/oh-my-codex-slim

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Last commit (this folder)
Aug 26, 2026 (2 months ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
Repository
github.com/Rafcin/oh-my-codex-slim
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
GitHubgithub-graphql

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Cite this page

tdd skill. Agent Mart. https://agentmart.dev/skills/rafcin-tdd (last updated 2026-10-24)