LangChain custom tools: stop LLM guessing now
Learn to build a CircumferenceTool in LangChain. This guide shows how custom tools replace token-based guessing with grounded, repeatable functions.
Learn to build a CircumferenceTool in LangChain. This guide shows how custom tools replace token-based guessing with grounded, repeatable functions.
Learn to build an agente de IA using LangChain's ReAct pattern. Discover how the four critical components create reliable, stateful automation.
LangChain offers 1000+ integrations to swap models without rewriting code. Its durable runtime ensures persistence and checkpointing for production agents.
LangChain v1.0 removes AgentExecutor, enforcing LangGraph as the sole runtime. Python 3.10 is now required for typesafe streaming and structured outputs.
With 57% of organizations running agents, static tests miss cascading failures. Learn to validate specific execution paths and tool calls effectively.
Evaluate four axes for agent orchestration as the 2026 engineering challenge. Compare state management and control flow across top frameworks.
Langchain sits at 140,351 stars. That number dominates the LLM agent landscape, but raw popularity rarely tells the whole story.