Every model the service holds.

Open a model for this session and reset the scope to its root. Returns its outline.

Create an empty model and select it.

Create a model from exported Relative JSON and select it.

Permanently delete a model and its snapshots.

Which model is selected, how deep the submodel scope is, and whether it is editable.

Scope into a submodel node, so reads and edits apply inside it.

Leave the current submodel. Give a depth to jump straight to that level (0 = root).

The current scope as a compact outline: nodes with their kind and value, links as arrows between named ports, views, and validation findings. Submodels are summarised, not expanded — use enter_submodel or get_element to look inside one.

One node, link, or view in full, including everything the outline summarises away.

Validation findings for the whole selected model.

A function node's script source, read-only.

Apply one or more changes as a single undoable operation. Put every change you already know you want in one call — steps apply in order and a later step can reference something an earlier one created. References are names ("Switch") or port references ("Switch.out"); anything that does not resolve is rejected before it is sent, so an edit never silently does nothing.

Add a submodel node backed by a model directory outside this one. The service validates the path against its RELATIVE_EXTERNAL_ROOTS allowlist and refuses anything outside it.

Execute a function node's pipeline and settle the reactive cascade.

undo the last operation on the selected model.

redo the last operation on the selected model.

Named on-disk checkpoints for the selected model.

Save a named, restorable checkpoint.

Restore a snapshot. This is itself undoable.