Refusals now arrive as a standardized content block in langchain-core 1.7.5 and later, so AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → code can detect and handle them uniformly across providers instead of parsing provider-specific output.
Terms in this piece · Glossary
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
