Seeded by topic
Each loop opens with curators who know its field: water, climate, financial inclusion, cities. They anchor the network around the problems being solved.
Reputation attached
Curators and members invite people they trust in that topic, 5–10 each. The inviter's reputation is attached to every invite: strong invites grow it, misconduct by an invitee costs the inviter.
Earn your way in
Open calls by a loop's funders, maintainers of open-source code that projects use, and residency alumni. Screened by agents and reviewed by members drawn by lot.
Proof of personhood plus identity checks (KYC for people, KYB for companies). Documents stay off-chain; only a cryptographic "verified" goes on-chain. Curators open doors; they never decide verdicts.