During March 2025, contributed to the oven-sh/bun repository by enhancing the Uint8Array.fromBase64 method to support broader compatibility and robustness in base64 decoding. The work introduced optional parameters for alphabet selection and last chunk handling, enabling the decoding of custom alphabets and improved handling of edge-case inputs. Addressed a type-related error in the decoding path, ensuring more reliable integration for downstream consumers. The enhancements were implemented using TypeScript with a focus on API design, aligning with existing base64 utilities to reduce runtime decoding errors and facilitate easier adoption of non-standard base64 alphabets across various use cases.