An agent network bootstrap stores its cluster as proxy_address, which selects the proxy that serves the endpoint. An account-scoped proxy only receives its own account's mappings, so a pin onto a host another account's proxy declares can never be served, and the endpoint is immutable — a dead gateway until the account deletes its settings. Nothing refused that pin; the domain unique index only arbitrates between endpoints.
Both bootstrap paths now refuse, before the insert, a host that another account's proxy declares, a host another account has labeled pins beneath (self-addressed path), or a hostname that is another account's endpoint (labeled path).
Shared clusters are unaffected: shared proxies are never foreign, and labeled pins under one cluster are never asked about, so any number of accounts still pin beneath eu.proxy.netbird.io. Registration is deliberately unchanged — refusing a proxy for another account's pin would let a pin lock a tenant out after the reaper drops its rows.
Maycon Santos
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