The mechanic that makes vendor consolidation work without flattening every brand is the brand-spine-per-brand discipline. The brand spine is a written and visual specification — forty to sixty pages per brand — that locks five variables for that brand alone. The signature color stack in Pantone and sRGB. The lighting language in physical units (key-light direction, source softness, color temperature, shadow density). The background and prop system. The model identity where the brand uses people on-frame. The crop, framing, and negative-space convention. Each brand in the portfolio has its own spine, ratified by the brand's CMO, signed by the portfolio creative ops director, and locked against the brand standards document the founder originally shipped.
What gets consolidated is the production layer underneath — the calibration hardware, the rendering stack, the color management workflow, the retouching discipline, the DAM integration, the QC checklist, the file naming convention, the per-asset SLA, and the calendar coordination across brands. The supplements brand spine sends the production lead one way; the snack brand spine sends them another; the apparel brand spine a third. The system is the same; the spine is the steering wheel. Anitra Dongre bridal richness, Chobani retail-shelf grammar, Armra wellness PDP language, David Harber finish library — different spines, same production system underneath, and the same case-study work appears in the Anita Dongre AI fashion photography bridal catalog, the Chobani CPG creative brand work, the Armra supplements photography PDP build, and the David Harber luxury home photography garden sculpture pack.
The consolidation contract enshrines that boundary. The master agreement at the holding-co level sets production economics, SLAs, DAM standards, and capacity allocations. Each brand-level addendum locks that brand's spine and names its production lead. The CMO of each brand retains sovereignty over the spine — ratifies changes, approves campaign concepts, owns final QC on every asset before DAM ingestion. The portfolio operator audits at the system level (capacity, SLA adherence, calendar coordination) and stays out of spine conversations unless a brand-level escalation routes up. The architecture mirrors the production-infrastructure model for in-house creative teams, scaled across nine brand spines instead of one.