What problem does it solve? Replacing a fragmented XO/ESLint/Prettier toolchain with a single fast tool requires careful rule mapping, and Biome's defaults differ from XO conventions, leading to inconsistent style and missed checks. ## Core Features & Use Cases - Strict Configuration Templates: Provides XO-like formatter settings (single quotes, tabs, 100-column width) and a strict linter ruleset covering complexity, correctness, security, style, and suspicious rules. - XO to Biome Migration Map: Maps common XO/ESLint rules to Biome equivalents and documents known gaps like type-aware rules that still require tsc --noEmit. - Bootstrap Script: Generates package.json scripts, biome.jsonc, and VS Code workspace settings via scripts/biome-js-bootstrap.sh strict. - Use Case: When migrating a TypeScript project from XO and Prettier to Biome, use this Skill to produce a strict biome.jsonc, wire up save-time fixes in VS Code, and keep CI running biome ci plus tsc --noEmit. ## Quick Start Ask the agent to set up a strict Biome configuration for your TypeScript project, replacing ESLint and Prettier, and run the bootstrap script to generate the config files.