GET /nodeinfo/2.0
Backing nodeinfo 2.0 document linked from /.well-known/nodeinfo. Minimal valid shape — software name, version, usage stats, openness flags — so the link chain from /.well-known/nodeinfo actually resolves.
expect: 200 OK, Content-Type: application/json with the nodeinfo 2.0 profile. Schema-valid per the nodeinfo project's spec.
headers
body