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/.well-known/agent-card.json
agent URL matches the OIDC and OAuth issuer
chaos.catastrophic.ioGET /.well-known/agent-card.json
Third sibling. Claims the canonical agent lives at https://agents.catastrophic.io/echo — yet another host. Also served at /.well-known/agent.json for the older Google A2A path.
not.catastrophic.ioBuild against not.catastrophic.io/.well-known/agent-card.json, then
flip the hostname to chaos.catastrophic.io to exercise the chaos.