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.
96
Quality
96%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Securityby
Passed
No known issues
migration-from-legacy-eslint.mdrules/
- name:
- migration-from-legacy-eslint
- description:
- Safe migration plan from legacy ESLint rc config to ESLint v9 flat config
- metadata:
- {"tags":"eslint, eslint9, migration, flat-config"}
Use this checklist to migrate with low risk.
Migration checklist
- Upgrade ESLint major version:
npm install --save-dev eslint@^9 - Create
eslint.config.jsoreslint.config.mjs - Translate legacy
extends,plugins, andoverridesinto flat-config entries - Remove
.eslintrc*and deprecated ignore files once parity is verified - Run lint and compare issue count before/after migration
- Fix rule parity gaps explicitly in config
- Update CI scripts to call
eslint .
Pitfalls to avoid
- Mixing legacy and flat config in the same project
- Forgetting to disable base rules when TS variants are enabled
- Assuming plugin presets are flat-config compatible without checking docs
- Migrating config and rule semantics in a single large change without validation