Documentation
A workflow is a graph of nodes. Each node takes configuration, runs once per execution, and returns an output that later nodes can read through expressions. These two pages cover both halves of that.
Node reference
All 114 available node types — their configuration fields, ports, credentials, and retry behaviour.
Expressions
How a node reads the output of the nodes before it, and the escaping rule that catches everyone once.
How this reference is built
The node pages are generated from the node registry at request time — the same definitions the editor palette, the configuration panel, and graph validation read. A field documented here is a field the editor renders, because there is only one description of it. Nothing on those pages is written by hand, so nothing on them can go stale.