Home / secondsky / claude-skills · GitHub

ultracite SKILL.md skillA

ultracite from secondsky/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add secondsky/claude-skills/ultracite@v2.0.0

Pins v2.0.0 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: secondsky/claude-skills
Path: plugins/ultracite/skills/ultracite/SKILL.md
Versions recorded: 5
Latest version: v2.0.0, committed Aug 3, 2026
First version recorded: May 14, 2026
Size: 25,987 bytes
Repository stars: 247
License: MIT

Ultracite multi-provider linting/formatting (Biome, ESLint, Oxlint). Use for v6/v7 setup, provider selection, Git hooks, MCP integration, AI hooks, migrations, or encountering configuration, type-aware linting, monorepo errors.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Ultracite Skill

**Fast, zero-config linting and formatting for modern JavaScript/TypeScript projects**

## Overview

Ultracite is a unified linting and formatting solution that supports multiple providers: **Biome** (default, Rust-based), **ESLint+Prettier+Stylelint**, and **Oxlint+Oxfmt**. It provides framework-specific presets and zero-configuration defaults, replacing traditional ESLint+Prettier setups with a faster, simpler alternative. Ultracite operates invisibly in the background, automatically formatting code and applying fixes on every save.

**Version 7 Changes**: Multi-provider architecture, preset path migration, MCP server support, AI hooks
**Version 6 Changes**: Framework-specific presets introduced (React, Next.js, Vue, Svelte, etc.)

### Core Goals

1. **Lightning-Fast Performance**: Leverages Biome's Rust implementation for instant linting/formatting
2. **Zero-Config Design**: Ships with 200+ sensible defaults optimized for modern TypeScript development
3. **Simplicity & Invisibility**: Operates with minimal user interaction
4. **Type Safety**: Enforces TypeScript strict mode and comprehensive null/undefined handling
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add secondsky/claude-skills/ultracite@sha256:df7b744f93fb418d

The line at the top of this page pins the label v2.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_hqxiw72dftnbkuq4.svg)](https://markdownregistry.com/a/art_hqxiw72dftnbkuq4)

5 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between May 14, 2026 and Aug 3, 2026, about one every 20 days.

version	committed	commit	size	audit
v2.0.0 latest	2026-08-03	74c08bd	25,987 B	A	view · diff
v2.0.0	2026-08-03	6c47f2a	25,929 B	A	view · diff
v2.0.0	2026-08-03	628621c	25,929 B	A	view · diff
v2.0.0	2026-08-03	875f1a8	25,967 B	A	view · diff
v2.0.0	2026-05-14	120edd6	25,964 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (25987 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

secondsky/claude-skills · 247 stars · license MIT · pushed 2026-10-31 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_hqxiw72dftnbkuq4
GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/ultracite
GET https://markdownregistry.com/api/v1/blob/df7b744f93fb418d2e47d36e634f0e95a2167f86288ee175f90d7c70763c032a

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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