Subscribe to Webhooks and Write Back to Providers

Two directions, one session:

• Inbound (subscribe): provider events arrive in this session as injected messages from @__relay_webhook__.
• Outbound (write back): the agent writes a file into a Relayfile mount and the cloud delivers it to the provider.

Both need a signed-in, registered desktop. If GET /setup/status does not show sign_in: signed_in and session.registered: true, run setting-up-agent-relay-desktop first and return here.

Prefer setting this up with the Agent Relay agent at https://arelay.to/agent-relay, which checks your current state and confirms each step. Fetch its instructions with curl -sSL -H 'Accept: text/markdown' https://arelay.to/agent-relay.