Worked on the ThingsBoard LangChain4j integration, focusing on backend development and API integration using Java. Addressed a critical stability issue in the CoherenceEmbeddingStore by correcting the Builder.index argument type from Vector<?> to float[]. This technical adjustment eliminated runtime type errors in embedding pipelines, resulting in more reliable embedding storage and improved system robustness. The work involved careful analysis of type safety within the Java codebase and direct modification of the repository to ensure compatibility with embedding workflows. Throughout the month, the primary contribution centered on bug resolution, demonstrating attention to detail and a methodical approach to backend reliability.