Worked on enhancing lint tooling compatibility across major JavaScript projects, focusing on ESLint v10 integration for both the nrwl/nx and facebook/hermes repositories. Delivered a critical update to @nx/eslint, aligning it with ESLint v10 internals to prevent lint-time failures and maintain existing configurations. For hermes-eslint, implemented global variable management and migrated internal configurations to flat config, ensuring readiness for future ESLint versions. Validated all changes through comprehensive local and CI testing, including thousands of test cases and edge scenarios. Leveraged expertise in JavaScript, linting, and testing to support stable, forward-compatible development workflows and improved developer experience.