Worked on the langchain-ai/langchain repository to enhance Fireworks chat API integration by developing a Message Content Formatter that translates canonical multimodal blocks for chat and completion messages into OpenAI-compatible formats. Focused on backend development and API integration using Python, the implementation included translation logic for various message types while preserving compatibility with existing AI message paths. Leveraged langchain_core/openai translators to ensure consistent handling of v0 and v1 data blocks, improving reliability and image handling in chat messages. Increased unit test coverage with nine new tests, passing all linting checks, and aligned the solution with Fireworks-OpenAI compatibility requirements.