ultracite

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.

Install with Tessl CLI

npx tessl i github:secondsky/claude-skills --skill ultracite

What are skills?

1.23x

Quality

92%

Does it follow best practices?

Impact

95%

1.23x

Average score across 3 eval scenarios

SKILL.md

Review

Evals

Evaluation results

92%

CI Breaking After Dependency Update

v7 preset path migration

Criteria

Without context

With context

Marketing core preset path

100%

Marketing react preset path

100%

Dashboard core preset path

100%

Dashboard next preset path

100%

No old v6 paths remain

100%

Doctor command mentioned

70%

100%

Bun used for package updates

Root cause identified

100%

Check command documented

100%

Config structure preserved

100%

Without context: $0.2807 · 1m 16s · 16 turns · 65 in / 3,362 out tokens

With context: $0.5620 · 1m 14s · 19 turns · 20 in / 3,850 out tokens

100%

43%

Set Up Code Quality Tooling for a New TypeScript React App

React project initialization

Criteria

Without context

With context

Bun used in setup script

100%

Init command used

100%

biome.jsonc created

100%

v7 core preset path

100%

v7 react preset path

100%

VS Code default formatter

100%

VS Code formatOnSave

100%

VS Code codeActionsOnSave

100%

strictNullChecks enabled

100%

Doctor command in setup

100%

Biome provider selected

100%

Without context: $0.3374 · 1m 19s · 16 turns · 16 in / 4,699 out tokens

With context: $0.6001 · 1m 27s · 26 turns · 21 in / 4,741 out tokens

95%

Add Pre-Commit Linting to a Turborepo Monorepo

Git hook integration

Criteria

Without context

With context

Lefthook used

100%

Pre-commit hook defined

100%

Staged files only

100%

No-errors-on-unmatched flag

100%

Covers apps/web pattern

100%

Covers packages/ui pattern

100%

Uses bunx not global install

50%

Write flag included

100%

Bypass documented with warning

80%

100%

Installation command documented

80%

100%

Without context: $0.1810 · 42s · 10 turns · 10 in / 2,204 out tokens

With context: $0.5904 · 1m 32s · 22 turns · 20 in / 4,950 out tokens

Evaluated: 5 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

CI Breaking After Dependency Update Set Up Code Quality Tooling for a New TypeScript React App Add Pre-Commit Linting to a Turborepo Monorepo

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