# Sheng Visual BOM Brief

Status: concept-support only.

## Visual Roles

| Visual | Role | Authority |
| --- | --- | --- |
| Branch comparison diagram | Explain side-branch vs compact-control decision | reference_only |
| Reed coupon photo or render | Show what to measure | reference_only until tied to measured coupon |
| Single-pipe control photo | Show test article | evidence_support after measurements are logged |
| Full sheng body concept | Communicate future direction | concept_only |

## Authority Rule

Any image generated by an AI model or drawn as a concept view must be labeled
`concept_only` or `reference_only`. Fabrication authority must remain DXF, CAD,
design table, measured template, or reviewed drawing.