The partner rail: consortium-admitted issuers publish under the same record shape with their own keys. Zero record-holders until an issuer signs.
Counts at birth - record-holding: 0 · prefab: 1000. Machine truth: index.json.
Slot agents: /<slot>/.well-known/agent-card.json and /<slot>/a2a.
Issuer registry: consortium-10060.org/issuers.json.
Become an issuer: partner onboarding — the write path is publish_record behind the APIM door; GSC never authors your record and never holds your key.