Worked on the labring/FastGPT repository to enhance the reliability of document ingestion, specifically addressing PowerPoint file parsing. Focused on improving error handling and file handling by implementing a UTF-8 fallback mechanism in the TypeScript-based parsing flow. This approach ensured that PowerPoint files with varying or incompatible encodings could be processed without failure, reducing downstream errors and minimizing support issues related to file compatibility. The targeted fix was delivered as a focused commit, directly addressing a known issue and resulting in more robust data processing. Utilized TypeScript and applied best practices in error handling to strengthen the overall ingestion pipeline.