Supercov logo

Supercov

Organization
supercorp-ai
supercov

Measures test coverage and code quality in a repository with the supercov CLI, and turns what it finds into small, focused tests or fixes. Use when the user asks to add or improve tests, find untested code or raise coverage, or find what to refactor. Works with JavaScript, TypeScript, Python, Ruby, Rust, Go, Java and Kotlin projects.

Overview

Publishersupercorp-ai
Repositorysupercov
Skill namesupercov
Stars
157
Forks
6
Bundled files
Instructions only
LicenseMIT
Links
  • 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 supercorp-ai on GitHub. Read the source before you install it.

Installation

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

1

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.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
    https://github.com/supercorp-ai/supercov/tree/main/plugins/supercov/skills/supercov
  4. 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.
2

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/supercorp-ai/supercov.git /tmp/supercov
mkdir -p .claude/skills
cp -r /tmp/supercov/plugins/supercov/skills/supercov .claude/skills/supercov
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Supercov 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 Supercov 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 Supercov 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.

Supercov

Supercov runs the project's own test command and changes no source, tests or configuration. npx supercov docs <topic> prints the guide for the installed version; read it for anything not shown here. Topics: agent-loop, quality, supported-suites, troubleshooting.

Add a test

  1. Measure the full suite: npx supercov -- <test command>, for example npx supercov -- npm test.
  2. List targets with npx supercov runs latest gaps --limit 5, pick one, and inspect it with npx supercov runs latest file <path>.
  3. Write one focused test. Change only tests unless the user asks otherwise.
  4. Rerun the same command and report the test and the coverage before and after.

Quality

  • npx supercov quality ranks files by code smells, and npx supercov quality patch reports what a change introduced.
  • It sends source files to TypeSafe using the TYPESAFE_API_KEY environment variable. A user who set the key has opted in, so run it without asking again. If the key is missing the command says so: tell the user how to set it, then answer from reading the code and say Supercov did not check it.

Without Node.js 22 or newer, install Supercov as the language guide at https://supercov.com/docs says, and run supercov instead of npx supercov.

Frequently asked questions

What does the Supercov AI skill do?

Measures test coverage and code quality in a repository with the supercov CLI, and turns what it finds into small, focused tests or fixes. Use when the user asks to add or improve tests, find untested code or raise coverage, or find what to refactor. Works with JavaScript, TypeScript, Python, Ruby, Rust, Go, Java and Kotlin projects.

Why use Supercov on TypingMind?

Because you install it once and use it with any model. Supercov 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 Supercov in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/supercorp-ai/supercov/tree/main/plugins/supercov/skills/supercov. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Supercov?

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 Supercov?

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

Is the Supercov AI skill free?

Yes. It is published on GitHub by supercorp-ai 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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