In agentic development, a workflow encodes the logic for a recurring task: when to call which model, what tools are in scope at each step, and where human approval is required. LangGraph and similar frameworks let you define workflows as code, making them testable and versionable. Workflows are more predictable than open-ended agents because their paths are bounded.
ELI5
Think of Workflow as a tool from the builder toolbox. A defined sequence of steps — human, AI, or both — to complete a repeatable process.
In practice
Use it when you are installing, editing, testing, reviewing, or shipping code. In practice, define the owner, input, output, and failure mode before you rely on it.