Structure nodes

Where in the UI. Structure tab palette and context menu. Illegal edges are rejected.

Kind	Name	What it is	Typical edges
`template`	Template	Root of the document. Owns elements, shared categories, assets, animations, and SVG dialogs.	`template → element, category, categoryDef, asset, animation, svgDialog`
`element`	Element	A kind of item this template can create (folder, task, product…). Holds layouts, scripts, category/class refs, defaults, and UI packs.	`element → layout, category, action, script, classApiCall, asset, itemDefaults, categoryDefaults, categoryRef, classRef, fieldBindings, editFilter, predefinedCanvasItem, editForm, graphWiringDefaults, itemUiActions, animation`
`layout`	Layout	One visual surface for an element (card, editor, compact…). Components live here.	`layout → component, action, script, classApiCall, animation, editFilter`
`component`	Component	A widget on a layout (text, chart, button…). Gestures wire to scripts/actions.	`component → action, script, asset, animation, classApiCall`
`category`	Category (instance)	A category as used on the template graph. Prefer categoryDef for the shared definition.	`—`
`categoryDef`	Category definition	Named category in the shared tree. Owns properties. Parent/child via categoryDef → categoryDef.	`categoryDef → categoryDef, categoryProp, asset`
`categoryProp`	Category property	One field on a category (text, enum, table…). Bindings must cite the owning category id.	`—`
`action`	Action	Host builtin (set value, navigate, open URL) or a custom action that runs a script.	`—`
`script`	Script	Blockly (or canonical JS) program. Attach via lifecycle wires or component gestures.	`—`
`expression`	Expression	Reusable computed value, authored on the expression canvas.	`—`
`asset`	Asset	Image or SVG in the project catalog (IndexedDB in the editor).	`—`
`itemDefaults`	Item defaults	Creation-time values for built-in item fields (title, colors, size…).	`—`
`categoryDefaults`	Category defaults	Creation-time values for category properties.	`—`
`categoryRef`	Category ref	Attaches a categoryDef to an element so items of that type can carry it.	`—`
`classRef`	Class ref	Attaches a reusable class package to an element.	`—`
`classApiCall`	Class API call	Picks a class-exported script for lifecycle or gesture wires.	`—`
`fieldBindings`	Field bindings	Writes expression results into item fields or category properties on each paint.	`—`
`editFilter`	Edit filter	Watches selected refs; only then runs onEdited (and similar) scripts.	`editFilter → script, action, animation, classApiCall`
`variables`	Variables	Class-authored item variable defaults (scratch keys on the item JSON).	`—`
`predefinedCanvasItem`	Predefined canvas item	Seed child item that appears when a parent is created.	`predefinedCanvasItem → itemDefaults, categoryDefaults`
`editForm`	Edit form	Named host modal for structured editing.	`—`
`graphWiringDefaults`	Graph wiring defaults	Default edge color/thickness when users wire items.	`—`
`itemUiActions`	Item UI actions	Context menu / header pack for the item in Containd.	`—`
`animation`	Animation	Named reusable canvas animation.	`—`
`svgDialog`	SVG dialog	Named SVG UI shown via showSvgDialog.	`—`
`class`	Class	Reusable package: categories, lifecycle scripts, API, variable defaults.	`class → script, action, editFilter, categoryRef, variables, class`

Source: app/lib/graph/workspaceModel.ts (WorkspaceNodeKind, ALLOWED_CONNECTIONS).