eslint-flat-config-utils

Utils for managing and manipulating ESLint flat config arrays. Current stable version is 3.1.0, released actively by antfu. Provides helpers like concat (flatten and merge configs/promises), composer (chainable API for appending, prepending, inserting, renaming plugins, overriding rules, removing rules, and disabling rule fixes), and resolveExtends for extending configs. Differentiators: chainable composer extends Promise for direct use in eslint.config.mjs; renamePlugins, removeRules, disableRulesFix are unique helpers not found in standard ESLint utilities. ESM-only since v2.0.0, TypeScript-ready with shipped types, and supports @eslint/config-helpers for extends resolution since v3.0.0.