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Agent skill

TDD

by vinvcn in vinvcn/mattpocock-skills-zh-CN

测试驱动开发。适用于用户想用先写测试的方式构建功能或修复缺陷、提到 “red-green-refactor”，或需要集成测试时。

MITAuto-check passedTesting & QA

Install TDD

skills CLI
$ npx skills add vinvcn/mattpocock-skills-zh-CN --skill tdd -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install vinvcn/mattpocock-skills-zh-CN tdd --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/vinvcn/mattpocock-skills-zh-CN.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/engineering/tdd .claude/skills/tdd && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
tdd
GitHub stars
4.7k
Token cost
~569 tokens
SKILL.md length
233 words
Files
4
Skills in repo
33
Repo updated
First seen
Licence
MIT

At a glance

测试驱动开发。适用于用户想用先写测试的方式构建功能或修复缺陷、提到 “red-green-refactor”，或需要集成测试时。

  • Tasks that involve Test-driven development
  • SKILL.md covers What a good test is, Seams — where tests go, Anti-patterns and Rules of the loop
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

TDD is an agent skill from vinvcn/mattpocock-skills-zh-CN. 测试驱动开发。适用于用户想用先写测试的方式构建功能或修复缺陷、提到 “red-green-refactor”，或需要集成测试时。

Its SKILL.md is about 570 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files (for example `agents/openai.yaml`, `mocking.md` and `tests.md`).

It sits in Testing & QA, covering Test-driven development. The repository describes itself as: 这是 mattpocock/skills 的简体中文本地化版本。 The licence is MIT.

When your agent uses it

  • Tasks that involve Test-driven development

Example prompts

  • “red-green-refactor”
  • “/tdd”

What it can do on your machine

Read from SKILL.md and the folder at commit 3f92a83. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

TDD loads about 569 tokens when it runs. Until then it costs about 17 tokens; SKILL.md has 233 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~17
When it runs · the whole SKILL.md, loaded when a task matches
~569

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from vinvcn/mattpocock-skills-zh-CN at commit 3f92a83, republished under its MIT licence (© vinvcn). 233 words, ~569 tokens.

Download SKILL.mdSave it as .claude/skills/tdd/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
tdd
description
测试驱动开发。适用于用户想用先写测试的方式构建功能或修复缺陷、提到 “red-green-refactor”，或需要集成测试时。

Test-Driven Development

TDD 是 red -> green loop。这个 skill 是让该 loop 产出值得保留的 tests 的 reference：什么是好 test、tests 应该放在哪里、anti-patterns，以及 loop 的规则。每个 cycle 前和 cycle 中都要参考这些内容，而不是事后才看。

探索 codebase 时，读取 CONTEXT.md（如果存在），让 test names 和 interface vocabulary 与项目 domain language 对齐，并尊重你触碰区域的 ADRs。

What a good test is

Tests 应通过 public interfaces 验证 behavior，而不是 implementation details。代码可以完全改变；tests 不该随之改变。一个好 test 读起来像 specification："user can checkout with valid cart" 能清楚说明存在什么能力；因为它不关心 internal structure，所以能承受 refactors。

示例见 tests.md，mocking 规则见 mocking.md。

Seams — where tests go

Seam 是你测试的 public boundary：可以观察 behavior、但不伸手进入内部的 interface。Tests 放在 seams 上，绝不针对 internals。

只测试预先认可的 seams。 写任何 test 前，先写下要测试的 seams 并与用户确认。未经确认的 seam 不写 test。你无法测试所有东西；提前认可 seams，才能把测试精力放在 critical paths 和复杂 logic 上，而不是每个 edge case。

询问："What's the public interface, and which seams should we test?"

当 interface 的形状本身就是问题所在时——module 该多深、seam 该放在哪里、interface 应该暴露什么——调用 Skill 工具并指定 codebase-design 获取词汇。它是 module、interface、depth、seam、adapter、leverage 和 locality 这些术语的共享来源，是供查阅的 reference，而不是要运行的 session。

Anti-patterns

  • Implementation-coupled — mock internal collaborators、测试 private methods，或通过 side channel 验证（例如不用 interface 而直接查询 database）。特征是 refactor 时 test 失败，但 behavior 没变。
  • Tautological — assertion 以和代码相同的方式重新计算 expected value（expect(add(a, b)).toBe(a + b)、手工按同一逻辑生成 snapshot、把 constant 断言等于它自己），因此天然 pass，永远无法与代码 disagree。Expected values 必须来自独立 source of truth：known-good literal、worked example 或 spec。
  • Horizontal slicing — 先写所有 tests，再写所有 implementation。批量 tests 验证的是 想象中的 behavior：你测试的是东西的 shape，不是 user-facing behavior；tests 会对真实变化迟钝，并在理解 implementation 前承诺 test structure。改用 vertical slices：一个 test -> 一个 implementation -> repeat，每个 test 都是回应上一轮学习的 tracer bullet。

Rules of the loop

  • Red before green. 先写 failing test，再只写足够让它通过的代码。不要预判未来 tests，也不要添加 speculative features。
  • One slice at a time. 每个 cycle 只处理一个 seam、一个 test、一个 minimal implementation。
  • Refactoring is not part of the loop. Refactoring 属于 review stage（见 code-review skill），不属于 red -> green implementation cycle。

© vinvcn, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files in skills/engineering/tdd of vinvcn/mattpocock-skills-zh-CN.

  • SKILL.md
  • agents/openai.yaml
  • mocking.md
  • tests.md

Open the folder on GitHubat commit 3f92a83

Compare with similar skills

TDD next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

TDD compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
TDD this skillvinvcn/mattpocock-skills-zh-CN4.7k—~569Automated safety check: PassMIT
TDDpietheinstrengholt/rssmonster56430 repos~906Automated safety check: PassMIT
TDD WorkflowhellangleZ/burn-in-cceverywhere-ralph11211 repos~2.4kAutomated safety check: PassNone
TDDsanity-io/sanity6.4k20 repos~1kAutomated safety check: PassMIT
Test Driven Developmentfarm-fe/farm5.6k51 repos~2.5kAutomated safety check: PassMIT
Tapd Story PipelineTencentBlueKing/bk-bcs840—~2.6kAutomated safety check: PassCustom licence

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Categories

Questions about TDD

What does TDD do?

测试驱动开发。适用于用户想用先写测试的方式构建功能或修复缺陷、提到 “red-green-refactor”，或需要集成测试时。. TDD is an agent skill from vinvcn/mattpocock-skills-zh-CN.

When should I use TDD?

TDD fits situations like: tasks that involve Test-driven development.

How do I install TDD in Claude Code?

Run `npx skills add vinvcn/mattpocock-skills-zh-CN --skill tdd -a claude-code`. Or copy the skill folder (skills/engineering/tdd in vinvcn/mattpocock-skills-zh-CN) into .claude/skills/tdd in your project. Claude Code loads it when a task matches its description.

How do I install TDD in Codex?

Run `npx skills add vinvcn/mattpocock-skills-zh-CN --skill tdd -a codex`. Or copy the skill folder (skills/engineering/tdd in vinvcn/mattpocock-skills-zh-CN) into .agents/skills/tdd in your project. Codex loads it when a task matches its description.

Can I use TDD in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add vinvcn/mattpocock-skills-zh-CN --skill tdd -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tdd, .gemini/skills/tdd, .github/skills/tdd and .opencode/skills/tdd in your project.

What does TDD need to run?

SKILL.md names no scripts, command-line tools or credentials: TDD is instructions for the agent only.

Does TDD access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is TDD safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does TDD use?

TDD is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does TDD use?

About 569 tokens (SKILL.md is roughly 2.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to TDD?

Skills that share tags, products or a category with TDD: TDD (pietheinstrengholt/rssmonster, 564 stars), TDD Workflow (hellangleZ/burn-in-cceverywhere-ralph, 112 stars), TDD (sanity-io/sanity, 6.4k stars) and Test Driven Development (farm-fe/farm, 5.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains TDD?

vinvcn (a GitHub user) maintains it in vinvcn/mattpocock-skills-zh-CN, which has 4,657 GitHub stars. The repository holds 33 skills in this directory. The repository was last updated on September 28, 2026.

Source: vinvcn/mattpocock-skills-zh-CN on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.