TanStack Start Shell
A1D AI
A clean web shell for the next A1D architecture: Hub owns identity, the TanStack backend only proxies, and api.a1d.ai remains the business source of truth.
Hub auth
OAuth token is read by the BFF and forwarded upstream.
API truth
Tasks, credits, history, assets, and billing-derived state stay in api.a1d.ai.
Thin backend
The SSR backend authenticates, forwards, and normalizes errors only.