Overview

This issue tracks the complete implementation of the ESLint 10 upgrade, which requires several coordinated breaking changes.

Background

PR #341 started the ESLint upgrade but is incomplete. ESLint 8→9 and 9→10 are breaking changes that require:

• typescript-eslint package upgrades
• Configuration migration to flat config format
• Node.js version bump
• CI workflow updates

Required Changes

• Upgrade @typescript-eslint/eslint-plugin and @typescript-eslint/parser to at least v8.56.0 (first version with ESLint 10 support)
• Migrate from .eslintrc.js to eslint.config.mjs (flat config format)
• Remove .eslintignore and integrate ignore patterns into flat config
• Update engines.node in package.json to >=20.19.0 (ESLint 10 requirement)
• Update GitHub workflows to remove Node.js 16.x and 18.x (no longer supported)

Reference Implementations

• Config migration: chore(deps:js): bump deps language#536
• Node.js version bump: chore(js): make [email protected] the minimum supported version language#535
• Migration guide: https://eslint.org/docs/latest/use/migrate-to-10.0.0

Context

• Related PR: chore: npm audit fix #341
• Discussion: chore: npm audit fix #341 (comment)
• Requested by: @rhamzeh