At its core, DAGent represents agent workflows as a directed acyclic graph of nodes, where each node can encapsulate an LLM call, custom function, or external tool. Developers define task dependencies explicitly, enabling parallel execution and conditional logic, while the framework manages scheduling, data passing, and error recovery. DAGent also provides built-in visualization tools to inspect the DAG structure and execution flow, improving debugging and auditability. With extensible node types, plugin support, and seamless integration with popular LLM providers, DAGent empowers teams to build complex, multi-step AI applications such as data pipelines, conversational agents, and automated research assistants with minimal boilerplate. The library's focus on modularity and transparency makes it ideal for scalable agent orchestration in both experimental and production environments.

LangChain is a modular framework that helps developers create advanced AI applications by connecting large language models with external data sources and tools. It provides chain abstractions for sequential LLM calls, agent orchestration for decision-making workflows, memory modules for context retention, and integrations with document loaders, vector stores, and API-based tools. With support for multiple providers and SDKs in Python and JavaScript, LangChain accelerates the prototyping and deployment of chatbots, QA systems, and personalized assistants.