A workflow is a directed graph of nodes. A node is either a trigger (Manual, Schedule, Webhook, Event, Block) or an action supplied by a plugin. Nodes connect through edges with named source handles, and runtime values flow between them using the template syntax {{@nodeId:Label.field}}. One run of a workflow is an execution, tracked with status, logs, and metrics.
Write operations sign through an organization wallet whose private key is generated and held inside a hardware enclave, and every run is recorded with its inputs, outputs, transaction hashes, and gas usage. Organizations set spending limits and gas sponsorship policy, so an automated caller cannot exceed the budget its owners approved.