What is the harness and why do you say it matters more than the model?

Two deployments of identical weights with different scaffolding produce visibly different quality. Providers bundle the two, so the scaffolding's contribution reads as a property of the model, which makes substitution feel risky when it is mostly a configuration change.

Centralpoint is a harness that outlives whichever weights it calls: skills in fixed tiers, retrieval bounded by index-time classification, budgets per execution, assembly retained for audit. Because it lives in the organization's environment, improving it improves every model the organization will ever call rather than improving one vendor's product.