The ESLint Rule Analyzer and Fixer provides intelligent JavaScript and TypeScript code quality management through the ESLint Node.js API. It loads project configurations using the new flat config system (eslint.config.js), analyzes rule interactions to detect conflicts between extends sources, and identifies performance-heavy rules that slow linting. The skill uses the ESLint Linter API to programmatically lint files, applies auto-fixable corrections via the fix option, and generates detailed reports using custom formatters. It manages plugin resolution through the ESLint plugin system, validates custom rule implementations against the Rule API schema, and generates shareable config packages. The analyzer tracks code quality metrics over time using git-aware file selection, produces trend reports showing issue density by category (errors, warnings, formatting, logic), and identifies hot-spot files that consistently trigger the most violations. It also integrates with editor configurations to synchronize ESLint settings across VS Code, WebStorm, and Neovim, manages override blocks for test files and configuration files, and recommends progressive rule adoption strategies for legacy codebases migrating to stricter standards.