Expert Brain (Paid Tier)
One brain, two doors. The paid door into the engine.
Ruled 7/11One brain, two doors. Chat now, MCP next. Sold as the paid tier and the first Engine piece.
The two doors
Chat door
A member talks to the brain in a normal chat window. Live.
MCP door
The same brain, reachable from the member’s own Claude. Their tokens pay for it, so client fuel is near zero.
Why it works
The MCP door is verified shippable: Claude connectors on all plans, the Cloudflare workers-oauth-provider pattern, stateless handler, per-call D1 entitlement for instant revoke. Both doors are a thin wrapper on one shared tools.ts contract. Living Profiles memory sits on D1.
Rollout
DH and Club first. Kelli is tenant #2. The paid tier is TP-20.