Simple Tdd

Organization

SylphAI-Inc

simple-tdd

Test-driven development methodology — write the failing test first, then the minimum code to pass it

Overview

Publisher	SylphAI-Inc
Repository	`atskills`
Skill name	`simple-tdd`
Stars	88
Forks	6
Bundled files	Instructions only
License	MIT
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
Self-contained
Everything the model needs lives in the instructions — no extra files to sync.
Open source
Published by SylphAI-Inc on GitHub. Read the source before you install it.

Installation

Install the Simple Tdd AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/SylphAI-Inc/atskills/tree/main/examples/simple-tdd
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/SylphAI-Inc/atskills.git /tmp/atskills
mkdir -p .claude/skills
cp -r /tmp/atskills/examples/simple-tdd .claude/skills/simple-tdd

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Simple Tdd in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Simple Tdd on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Simple Tdd is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Simple TDD Workflow

Follow test-driven development strictly for the task at hand. Do not write implementation code before a failing test exists for it.

Steps

Understand the requirement. Restate what behavior is being added or fixed, in one or two sentences, before touching any file.
Write a failing test first.
- Add a test that exercises the new/changed behavior.
- Run the test suite and confirm the new test fails (and fails for the expected reason — a wrong assertion or a crash from unimplemented code, not an unrelated error).
- If it doesn't fail, the test isn't testing anything new — fix the test before proceeding.
Write the minimum code to make it pass.
- Implement just enough to make the failing test green. Resist the urge to add extra functionality, generalization, or "while I'm here" cleanup at this stage.
- Run the full test suite. All tests — the new one and every existing one — must pass.
Refactor only when green.
- With all tests passing, look for duplication, unclear naming, or structural issues introduced by the minimal implementation.
- Refactor in small steps, re-running the test suite after each change to confirm nothing broke.
- Do not add new behavior during this step — refactoring changes structure, not behavior.
Repeat. For the next requirement or edge case, go back to step 2.

Rules

Never write production code without a failing test that requires it.
Never write more test code than is sufficient to fail.
Never write more production code than is sufficient to pass the currently failing test.
If you find yourself writing several tests before making any of them pass, stop — return to one test at a time.

When to Deviate

For pure exploration/spike work (throwaway prototyping to understand a problem), it's acceptable to skip strict TDD — but say so explicitly, and any code from the spike should be rewritten test-first before it ships.

Frequently asked questions

What does the Simple Tdd AI skill do?

Test-driven development methodology — write the failing test first, then the minimum code to pass it

Why use Simple Tdd on TypingMind?

Because you install it once and use it with any model. Simple Tdd is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Simple Tdd in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/SylphAI-Inc/atskills/tree/main/examples/simple-tdd. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Simple Tdd?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Simple Tdd?

As many as you like. As long as a model supports skills, you can use Simple Tdd with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Simple Tdd AI skill free?

Yes. It is published on GitHub by SylphAI-Inc under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Simple TDD Workflow

Steps

Rules

When to Deviate

Frequently asked questions

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