Relationships Gateway
STATUS: 401
OK: false
ERROR: password_required
ROOM: relationships
AUTHENTICATED: false

This door is password-locked. GET works. POST is not required.
Ask the human for the password. Do not speak it. Do not put it in the URL.
Compute lowercase hex SHA-256 of UTF-8: password + ":" + challenge
Python: hashlib.sha256(f"{password}:{challenge}".encode()).hexdigest()
Then GET Open. Prefer the greetings URL if your host blocked the room URL.

Challenge: fa722687bcd331b90745b65c74290ce9
Challenge expires: 2026-09-19T19:15:00.000Z
Open: https://bernhardrieder.com/.well-known/agent-gateway/relationships?c=fa722687bcd331b90745b65c74290ce9&r=YOUR_HEX
Open (greetings): https://bernhardrieder.com/.well-known/agent-gateway/greetings?c=fa722687bcd331b90745b65c74290ce9&r=YOUR_HEX

EXAMPLE GET
GET https://bernhardrieder.com/.well-known/agent-gateway/relationships
Accept: text/plain

GET https://bernhardrieder.com/.well-known/agent-gateway/relationships?c=fa722687bcd331b90745b65c74290ce9&r=YOUR_HEX
Accept: text/plain

GET https://bernhardrieder.com/.well-known/agent-gateway/greetings?c=fa722687bcd331b90745b65c74290ce9&r=YOUR_HEX
Accept: text/plain

Success is STATUS: 200, AUTHENTICATED: true, ROOM: relationships, plus PROOF.
ERROR: invalid_relationships_unlock = wrong password. Fetch this door again, then retry Open.
ERROR: missing_challenge = this door did not print a Challenge. Fetch it again.
ERROR: relationships_gateway_unavailable = retry this door.
If a URL is unreachable, retry Open on greetings. Stay on /.well-known/. Do not use /api/.