New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Strict TDD

by proffesor-for-testing in proffesor-for-testing/agentic-qe

A skill your agent uses when enforcing TDD discipline — blocks writing production code unless a failing test exists first.

MITAuto-check passedTesting & QA

Install Strict TDD

skills CLI
$ npx skills add proffesor-for-testing/agentic-qe --skill strict-tdd -a claude-code

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

GitHub CLI
$ gh skill install proffesor-for-testing/agentic-qe strict-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/proffesor-for-testing/agentic-qe.git skills-src && mkdir -p .claude/skills && cp -r skills-src/assets/skills/strict-tdd .claude/skills/strict-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
strict-tdd
GitHub stars
494
Token cost
~496 tokens
SKILL.md length
128 words
Files
2 (incl. scripts)
Skills in repo
95
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when enforcing TDD discipline — blocks writing production code unless a failing test exists first.

  • Works in 2 steps: A test file exists that covers the… → That test has at least one failing…
  • Enforcing TDD discipline — blocks writing production code unless a failing test exists first
  • SKILL.md covers What It Does, Activation, Hook Configuration and Enforcement Logic, plus 1 more section
  • Runs Shell scripts from its folder; calls npx

What it does

Strict TDD is an agent skill from proffesor-for-testing/agentic-qe. Use when enforcing TDD discipline — blocks writing production code unless a failing test exists first. Activate with /strict-tdd to enable session-scoped Red-Green-Refactor guardrail.

Its SKILL.md is about 500 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including scripts (for example `scripts/enforce-red-phase.sh`).

It sits in Testing & QA, covering Test-driven development. The repository describes itself as: Agentic QE Fleet is an open-source AI-powered QA/QE platform designed for use with Coding Agents (works best with Claude Code) featuring specialized agents and skills to support… The licence is MIT.

When your agent uses it

  • Enforcing TDD discipline — blocks writing production code unless a failing test exists first
  • Tasks that involve Test-driven development

Example prompts

  • “/strict-tdd”

Requirements

  • Node.js
  • A Bash shell

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

  1. A test file exists that covers the target module
  2. That test has at least one failing assertion (Red phase confirmed)

What it can do on your machine

Read from SKILL.md and the folder at commit 829d030. 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

    Ships 1 file in scripts/ (Shell), which the agent can run.

    Shell commands in SKILL.md call:

    • npx

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

  • Network

    No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.

    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

Strict TDD loads about 496 tokens when it runs. Until then it costs about 49 tokens; SKILL.md has 128 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~49
When it runs · the whole SKILL.md, loaded when a task matches
~496

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); the scripts in this folder are not scanned.

SKILL.md

The full file from proffesor-for-testing/agentic-qe at commit 829d030, republished under its MIT licence (© proffesor-for-testing). 128 words, ~496 tokens.

Download SKILL.mdSave it as .claude/skills/strict-tdd/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
strict-tdd
description
Use when enforcing TDD discipline — blocks writing production code unless a failing test exists first. Activate with /strict-tdd to enable session-scoped Red-Green-Refactor guardrail.
user-invocable
true

Strict TDD Mode

When activated, this skill registers a session-scoped hook that enforces Red-Green-Refactor discipline.

What It Does

Blocks writes to src/ (production code) unless:

  1. A test file exists that covers the target module
  2. That test has at least one failing assertion (Red phase confirmed)

This prevents the common agent failure of writing test + implementation simultaneously.

Activation

/strict-tdd

Remains active for the current session only.

Hook Configuration

json
{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Write|Edit",
        "hook": ".claude/skills/strict-tdd/scripts/enforce-red-phase.sh",
        "condition": "file matches src/**/*.{ts,js} AND NOT src/**/*.test.{ts,js}"
      }
    ]
  }
}

Enforcement Logic

bash
#!/bin/bash
# enforce-red-phase.sh
# Called before any Write/Edit to src/ files

TARGET_FILE="$1"
TEST_FILE="${TARGET_FILE%.ts}.test.ts"

if [ ! -f "$TEST_FILE" ]; then
  echo "BLOCKED: No test file found at $TEST_FILE"
  echo "Write a failing test first (Red phase), then implement."
  exit 1
fi

# Check if tests are currently failing (Red phase)
npx jest "$TEST_FILE" --passWithNoTests 2>/dev/null
if [ $? -eq 0 ]; then
  echo "WARNING: Tests are passing. Are you in Green/Refactor phase?"
  echo "If adding new behavior, write a failing test first."
fi

Gotchas

  • Only blocks src/ files — test files and config files are always writable
  • During Refactor phase, tests should still pass — this is expected, don't treat as violation
  • If test runner isn't installed, hook will error — ensure jest/vitest is available
  • Agent may try to write to a different path to bypass — the hook should match all production code paths

© proffesor-for-testing, 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 1 other file (scripts) in assets/skills/strict-tdd of proffesor-for-testing/agentic-qe.

  • SKILL.md
  • scripts/enforce-red-phase.sh

Open the folder on GitHubat commit 829d030

Compare with similar skills

Strict 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.

Strict TDD compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Strict TDD this skillproffesor-for-testing/agentic-qe494—~496Automated 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

Similar skills

  • TDD

    pietheinstrengholt/rssmonster

    Test-driven development. An agent skill from pietheinstrengholt/rssmonster.

    564 GitHub starsUsed in 30 repos~906 tokens
    Testing & QAAuto-check passed

  • TDD Workflow

    hellangleZ/burn-in-cceverywhere-ralph

    A skill your agent uses when writing new features, fixing bugs, or refactoring code.

    112 GitHub starsUsed in 11 repos~2.4k tokens
    Testing & QAAuto-check passed

  • TDD

    sanity-io/sanity

    Official

    Test-driven development with red-green-refactor loop. An agent skill from sanity-io/sanity.

    6.4k GitHub starsUsed in 20 repos~1k tokens
    Testing & QAAuto-check passed

  • Test Driven Development

    farm-fe/farm

    A skill your agent uses when implementing any feature or bugfix, before writing implementation code

    5.6k GitHub starsUsed in 51 repos~2.5k tokens
    Testing & QAAuto-check passed

  • Tapd Story Pipeline

    TencentBlueKing/bk-bcs

    单需求实现流水线——把一个 TAPD 需求从零推进到代码提交。自动串联技术澄清、 开发计划、任务拆分、TDD 实现、架构/安全校验、代码提交六个阶段。

    840 GitHub stars~2.6k tokensUpdated today
    Testing & QAAuto-check passed

  • Absolute Init

    maddhruv/absolute

    One-time setup for absolute: interview how you want it to behave (output style, autonomy, TDD strictness, spec dir, families) + detect the stack once, then write .absolute.config.json (project…

    218 GitHub starsUsed in 1 repo~3k tokens
    Testing & QAAuto-check passed

More from proffesor-for-testing/agentic-qe

All 95 skills in this repo

  • Contract Testing

    proffesor-for-testing/agentic-qe

    Consumer-driven contract testing for microservices using Pact, schema validation, API versioning, and backward compatibility testing.

    494 GitHub stars~1.8k tokensUpdated 4 days ago
    Auto-check passed

  • Mutation Testing

    proffesor-for-testing/agentic-qe

    Test quality validation through mutation testing, assessing test suite effectiveness by introducing code mutations and measuring kill rate.

    494 GitHub stars~1.7k tokensUpdated 4 days ago
    Auto-check passed

  • Performance Testing

    proffesor-for-testing/agentic-qe

    Profiles application performance under load using k6, Artillery, or JMeter to measure latency, throughput, and error rates.

    494 GitHub stars~2.4k tokensUpdated 4 days ago
    Auto-check passed

  • Code Review Quality

    proffesor-for-testing/agentic-qe

    Conduct context-driven code reviews focusing on quality, testability, and maintainability.

    494 GitHub starsUsed in 1 repo~1.9k tokens
    Auto-check passed

  • Security Testing

    proffesor-for-testing/agentic-qe

    Scans for security vulnerabilities including XSS, SQL injection, CSRF, and auth flaws using OWASP Top 10 methodology.

    494 GitHub stars~2.7k tokensUpdated 4 days ago
    Auto-check: notes

  • Database Testing

    proffesor-for-testing/agentic-qe

    Database schema validation, data integrity testing, migration testing, transaction isolation, and query performance.

    494 GitHub starsUsed in 1 repo~1.7k tokens
    Auto-check passed

Categories

Questions about Strict TDD

What does Strict TDD do?

A skill your agent uses when enforcing TDD discipline — blocks writing production code unless a failing test exists first. Strict TDD is an agent skill from proffesor-for-testing/agentic-qe. Use when enforcing TDD discipline — blocks writing production code unless a failing test exists first.

When should I use Strict TDD?

Strict TDD fits situations like: enforcing TDD discipline — blocks writing production code unless a failing test exists first; tasks that involve Test-driven development.

How do I install Strict TDD in Claude Code?

Run `npx skills add proffesor-for-testing/agentic-qe --skill strict-tdd -a claude-code`. Or copy the skill folder (assets/skills/strict-tdd in proffesor-for-testing/agentic-qe) into .claude/skills/strict-tdd in your project. Claude Code loads it when a task matches its description.

How do I install Strict TDD in Codex?

Run `npx skills add proffesor-for-testing/agentic-qe --skill strict-tdd -a codex`. Or copy the skill folder (assets/skills/strict-tdd in proffesor-for-testing/agentic-qe) into .agents/skills/strict-tdd in your project. Codex loads it when a task matches its description.

Can I use Strict 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 proffesor-for-testing/agentic-qe --skill strict-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/strict-tdd, .gemini/skills/strict-tdd, .github/skills/strict-tdd and .opencode/skills/strict-tdd in your project.

What does Strict TDD need to run?

Going by SKILL.md and its folder, Strict TDD needs a shell for the scripts in its folder and the command-line tools its instructions call (npx). Our summary lists: Node.js; A Bash shell.

Does Strict TDD access the network?

SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Strict 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Strict TDD use?

Strict 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 Strict TDD use?

About 496 tokens (SKILL.md is roughly 2k 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 Strict TDD?

Skills that share tags, products or a category with Strict 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 Strict TDD?

proffesor-for-testing (a GitHub user) maintains it in proffesor-for-testing/agentic-qe, which has 494 GitHub stars. The repository holds 95 skills in this directory. The repository was last updated on October 4, 2026.

Source: proffesor-for-testing/agentic-qe on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.