During April 2026, Wei worked on the NousResearch/hermes-agent repository, focusing on backend development and API integration using Python. He addressed a reliability issue with Feishu image uploads by implementing a targeted bug fix: wrapping image bytes in a BytesIO object before passing them to the Lark SDK. This technical approach ensured the correct input format for the SDK, reducing upload failures and improving the user experience for image attachments. Wei’s work demonstrated practical Python I/O handling and careful integration with third-party APIs, resulting in a more stable upload process and lowering the support burden for Feishu users.