Build Mode

Build mode is the workflow editor. The shell is TopBar, a left NodePalette, a center WorkflowCanvas, and a right InspectorPanel.

Drag and drop

Drag a node from the palette (groups: control, leaf, dynamic, state, retrieval) onto the canvas. Connect ports to form a DAG. The canvas persists positions into metadata.canvas.positions.

Inspector

Selecting a node opens the Inspector with a typed form (String, Number, Boolean, Enum, Array, Object, Template) generated from the node config schema.

Validate and dry-run

• Validate runs the same six rules as the compiler and surfaces structured errors inline.
• Dry-run streams mock outputs per node via an SSE endpoint so you can see the shape of execution without real model calls.

Save and dirty guard

Save persists the workflow to /api/workflows. Unsaved changes trigger a dirty guard with a beforeunload prompt.