Agent skill · software engineering · mcollina
linting-neostandard-eslint9
Configures ESLint v9 flat config and neostandard for JavaScript and TypeScript projects, including migrating from legacy `.eslintrc*` files or the `standard` package. Use when you need to set up or fix linting with `eslint.config.js` or `eslint.config.mjs`, troubleshoot lint errors, configure neostandard rules, migrate from `.eslintrc` to flat config, or integrate linting into CI pipelines and pre-commit hooks.
Why this skill is useful
Provides specific configuration patterns and migration steps for ESLint v9 and neostandard that the AI wouldn't reliably generate on its own.
What it needs
Requires eslint, neostandard installed locally. About 1k tokens when loaded. Last updated 2026-08-03. 1,894 stars on the source repository.
What this skill does
When to use Use this skill when you need to: Set up linting in a JavaScript or TypeScript project Use neostandard as a Standard-like ESLint v9 flat-config baseline Configure eslint@9 with the flat config system (eslint.config.js/eslint.config.mjs) Migrate from standard to neostandard or ESLint v9 Migrate from legacy .eslintrc configuration to ESLint v9 Run linting consistently in CI and local development Quick start: basic neostandard setup Install dependencies and create a minimal eslint.config.js: Verify the config works: Common setup workflow (new project) 1. Install eslint@9 and neostandard (see Quick start above) 2. Create eslint.config.js with neostandard() as the base 3. Add any project-specific rule overrides on top 4. Run npx eslint . to confirm no config errors 5. Add a lint script to package.json: "lint": "eslint ." 6. Integrate into CI with a non-fix run; use --fix only in local workflows How to use Read individual rule files for implementation details and examples: rules/neostandard.md - Install, configure, and extend neostandard with ESLint rules/eslint-v9-flat-config.md - Build ESLint v9 flat config for JS/TS projects rules/migration-from-standard.md - Migrate from standard to neostandard or ESLint v9 rules/migration-from-legacy-eslint.md - Migrate from .eslintrc to flat config safely rules/ci-and-editor-integration.md - CI scripts, pre-commit, and editor setup Core principles Prefer reproducible linting with pinned major versions Keep config minimal and explicit Use flat config for ESLint v9 projects Treat lint failures as quality gates in CI Enable auto-fix for local workflows, but validate with non-fix CI runs
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills mcollina/linting-neostandard-eslint9