Worked on stabilizing the prompt processing pipeline for the datawhalechina/hello-agents repository by addressing a critical bug related to prompt template placeholder syntax. Focused on correcting Markdown documentation and refining syntax to ensure that tool invocation within prompts followed the expected format, thereby reducing downstream errors and improving automation reliability. Validated the fix against version 4.2.3 to prevent regression and updated relevant code paths to maintain consistency. The work emphasized careful attention to documentation and syntax correction, contributing to a more robust workflow for prompt handling and supporting smoother integrations with other systems dependent on accurate prompt processing.