Andrew Martin Gonzales developed a static analysis enhancement for the oxc-project/tsgolint repository, focusing on modernizing code patterns by introducing a prefer-includes rule. This rule detects uses of indexOf(...) !== -1 and /regex/.test() and recommends migrating to includes for improved clarity and maintainability. Andrew utilized TypeScript and ESLint, integrating type-checking to ensure the rule only applies when safe, thereby reducing false positives. The implementation leveraged regex processing and typescript-eslint utilities to handle edge cases robustly. Comprehensive testing, including formatting, linting, end-to-end, and Go tests, validated the feature’s reliability and ensured it would not introduce regressions.