Worked on the e2b-dev/E2B repository to address stability issues in template copying within ESM environments. Focused on resolving a bug in getCallerDirectory() by converting file URLs to filesystem paths using fileURLToPath(), which allowed Template().copy() to function without ENOENT errors across both CommonJS and ESM modules. Added targeted unit tests to document and prevent regressions in ESM URL handling. Validated the solution by building the SDK locally and testing with a reproduction repository. Utilized JavaScript, Node.js, and testing frameworks to improve cross-compatibility, reducing runtime errors and support needs for template utilities in modern JavaScript workflows.