From 4221985b90379a40e65b0c1f3a72975883ba3bb6 Mon Sep 17 00:00:00 2001
From: Evan Jarrett <evan@evanjarrett.com>
Date: Tue, 14 Oct 2025 21:08:49 -0500
Subject: [PATCH] show availableUserDomains

---
 pkg/hold/pds/xrpc.go | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkg/hold/pds/xrpc.go b/pkg/hold/pds/xrpc.go
index c52fdcc..13a6613 100644
--- a/pkg/hold/pds/xrpc.go
+++ b/pkg/hold/pds/xrpc.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"strings"
 )
 
 // XRPC handler for ATProto endpoints
@@ -93,9 +94,17 @@ func (h *XRPCHandler) HandleDescribeServer(w http.ResponseWriter, r *http.Reques
 		return
 	}
 
+	// Extract hostname from public URL for availableUserDomains
+	// For hold01.atcr.io, return [".hold01.atcr.io"] to match stream.place pattern
+	hostname := h.publicURL
+	hostname = strings.TrimPrefix(hostname, "http://")
+	hostname = strings.TrimPrefix(hostname, "https://")
+	hostname = strings.Split(hostname, "/")[0] // Remove path
+	hostname = strings.Split(hostname, ":")[0] // Remove port
+
 	response := map[string]interface{}{
 		"did":                  h.pds.DID(),
-		"availableUserDomains": []string{},
+		"availableUserDomains": []string{"." + hostname},
 		"inviteCodeRequired":   true, // Single-user PDS, no account creation
 	}