Contributed to the langchain-ai/docs repository by delivering three targeted documentation features focused on improving developer onboarding and clarifying API usage. Leveraging JavaScript and Markdown, the work included a detailed comparison of Legacy PGVector and Modern PGVectorStore to guide users through integration choices, as well as enhanced API documentation explaining the roles of set_entry_point and set_finish_point in graph execution. Practical examples, such as a cat poem prompt-handling demonstration, were added and existing examples refreshed to illustrate agent capabilities. These updates addressed common points of confusion, reduced onboarding time, and improved the overall quality and accuracy of technical documentation for AI integration.