Skills 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.

install

source · Clone the upstream repo

git clone https://github.com/mcollina/skills

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/mcollina/skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/linting-neostandard-eslint9" ~/.claude/skills/mcollina-skills-linting-neostandard-eslint9 && rm -rf "$T"

manifest: skills/linting-neostandard-eslint9/SKILL.md

source content

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

npm install --save-dev eslint@9 neostandard

// eslint.config.js
import neostandard from 'neostandard'

export default neostandard()

Verify the config works:

npx eslint .

Common setup workflow (new project)

Install
```
eslint@9
```
and
```
neostandard
```
(see Quick start above)
Create
```
eslint.config.js
```
with
```
neostandard()
```
as the base
Add any project-specific rule overrides on top
Run
```
npx eslint .
```
to confirm no config errors
Add a lint script to
```
package.json
```
:
```
"lint": "eslint ."
```
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