Treat prompts and source media as user-owned inputs, keep MediaHub credentials/config/execution in one reusable middle block, and reserve outputs for Preview/Save nodes.
Constraint: Samples must show users exactly which block to copy into an existing workflow.
Rejected: Classifying API Key and execution nodes as inputs or outputs | exposes internal mechanics and weakens sample readability.
Confidence: high
Scope-risk: narrow
Directive: Keep sample responsibilities separated and all connections flowing left to right.
Tested: 124 pytest tests; JavaScript syntax; Python compilation; JSON validation; live ComfyUI accepted all eight prompt structures.
Not-tested: Manual visual import of all eight revised examples.