Node graphs and exposed parameters

Workflow graphs are typed directed acyclic graphs. Nodes declare input and output types, parameters, versions, and (where applicable) execution requirements. The Python SDK validates a graph against installed node schemas before it runs.

Official pack schemas are generated from the SDK's declared node classes without importing model runtimes. Browse the node reference for current IDs, ports, parameter defaults, and constraints. The MCP workflow-authoring guide describes authoring and validation from coding agents.