During January 2026, this developer contributed to the typescript-eslint/typescript-eslint repository by designing and implementing the strict-void-return ESLint rule, which enforces that functions expected to return void do not inadvertently return values. Their work focused on enhancing type safety in TypeScript codebases through static code analysis, integrating the new rule into the existing plugin architecture, and extending its logic to handle base classes and interfaces. They also updated the testing pipeline and documentation to support the rule, ensuring comprehensive test coverage and clear guidance for users. Collaboration with other contributors included co-authoring edits and improving lint and test harness workflows.