eslint-formatter-summary

ESLint formatter that aggregates linting results by rule, showing total errors and warnings per rule instead of per-file output. Current stable version is 2.0.2 (April 2025), with regular releases. Key differentiator: helps introduce ESLint to large codebases by summarizing rule failures, making it easier to suppress or prioritize fixes. Supports sorting by rule name, error count, or warning count via environment variables. Written in TypeScript, requires Node.js >=20.