Worked on enhancing the reliability of the haystack embedding pipeline in the deepset-ai/haystack repository, focusing on backend development and robust data processing. Addressed a type-mismatch error by updating the OutputAdapter to handle string inputs safely, ensuring that the SentenceTransformersDocumentEmbedder consistently receives the correct input types. This change, implemented in Python, improved error handling and reduced workflow interruptions during document embedding. The update also prompted necessary documentation revisions to reflect the new input handling approach. Although no new features were added during this period, the work demonstrated careful attention to reliability and maintainability in a complex data processing environment.