configure-formatting

created	"2025-12-16T00:00:00.000Z"
modified	"2026-06-18T00:00:00.000Z"
reviewed	"2026-06-10T00:00:00.000Z"
description	Biome formatter for JS/TS/JSON/CSS — the modern Prettier/ESLint replacement. Also Ruff (Python) and rustfmt. Use when setting up formatting, replacing Prettier, or wiring CI format checks.
allowed-tools	Glob, Grep, Read, Write, Edit, Bash, AskUserQuestion, TodoWrite, WebSearch, WebFetch
args	[--check-only] [--fix] [--formatter <biome|ruff|rustfmt>]
argument-hint	[--check-only] [--fix] [--formatter <biome|ruff|rustfmt>]
name	configure-formatting

/configure:formatting

Check and configure code formatting tools against modern best practices.

When to Use This Skill

Use this skill when...	Use another approach when...
Setting up Biome, Ruff format, or rustfmt for a project	Running an existing formatter (biome format, ruff format)
Migrating from Prettier or ESLint to Biome, or Black to Ruff	Fixing individual formatting issues in specific files
Auditing formatter configuration for completeness and best practices	Configuring linting rules (/configure:linting instead)
Adding format-on-save and CI format checks	Setting up pre-commit hooks only (/configure:pre-commit instead)
Standardizing formatting settings across a monorepo	Editing .editorconfig or .vscode/settings.json manually

Context

• Biome config: !find . -maxdepth 1 -name \'biome.json\'
• Prettier config: !find . -maxdepth 1 \( -name '.prettierrc*' -o -name 'prettier.config.*' \)
• Ruff config: !find . -maxdepth 1 -name 'pyproject.toml' -exec grep -l 'tool.ruff.format' {} +
• Black config: !find . -maxdepth 1 -name 'pyproject.toml' -exec grep -l 'tool.black' {} +
• Rustfmt config: !find . -maxdepth 1 \( -name 'rustfmt.toml' -o -name '.rustfmt.toml' \)
• EditorConfig: !find . -maxdepth 1 -name \'.editorconfig\'
• Package JSON: !find . -maxdepth 1 -name \'package.json\'
• Python project: !find . -maxdepth 1 -name \'pyproject.toml\'
• Rust project: !find . -maxdepth 1 -name \'Cargo.toml\'
• Pre-commit: !find . -maxdepth 1 -name \'.pre-commit-config.yaml\'
• Project standards: !find . -maxdepth 1 -name \'.project-standards.yaml\'

Parameters

Parse from $ARGUMENTS:

• --check-only: Report compliance status without modifications
• --fix: Apply all fixes automatically without prompting