Designer Session

Read the active Designer session and graph before mutating it. The public tools create only bounded built-in sbs:: node types, address explicit node and property identifiers, and accept an allowlisted set of scalar and vector value types. They do not expose an eval, script, shell, or generic action surface.

Use export_graph_state after each authoring sequence to verify node count, type URLs, positions, parameters, topology, and output usages. A typical graph sequence is create_graph → create_node → connect_nodes → set_parameter/expose_parameter → add_output/set_output_usage → save_package_as → export_graph_state.