From f413ac410f8e3782885ae3872e956a9d0b0757f9 Mon Sep 17 00:00:00 2001
From: John Lancaster <32917998+jsl12@users.noreply.github.com>
Date: Sat, 7 Jun 2025 11:58:49 -0500
Subject: [PATCH 1/2] improved error text

---
 appdaemon/adapi.py      | 15 ++++++++++++++-
 appdaemon/exceptions.py |  8 ++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/appdaemon/adapi.py b/appdaemon/adapi.py
index 2c8e05743..3715cf594 100644
--- a/appdaemon/adapi.py
+++ b/appdaemon/adapi.py
@@ -1845,7 +1845,20 @@ def register_service(self, service: str, cb: Callable, namespace: str | None = N
         self.logger.debug("register_service: %s, %s", service, kwargs)
 
         namespace = namespace or self.namespace
-        self.AD.services.register_service(namespace, *service.split("/"), cb, __async="auto", name=self.name, **kwargs)
+        try:
+            domain, service = service.split("/", 2)
+        except ValueError as e:
+            raise ade.DomainNotSpecified(namespace, service) from e
+        else:
+            self.AD.services.register_service(
+                namespace,
+                domain=domain,
+                service=service,
+                callback=cb,
+                __async="auto",
+                name=self.name,
+                **kwargs
+            )  # fmt: skip
 
     def deregister_service(self, service: str, namespace: str | None = None) -> bool:
         """Deregister a service that had been previously registered.
diff --git a/appdaemon/exceptions.py b/appdaemon/exceptions.py
index b546dae93..caf4e1dfc 100644
--- a/appdaemon/exceptions.py
+++ b/appdaemon/exceptions.py
@@ -227,6 +227,14 @@ def __str__(self):
             f"Services that exist in {self.domain}: {', '.join(self.domain_services)}"
         )
 
+@dataclass
+class DomainNotSpecified(AppDaemonException):
+    namespace: str
+    service: str
+    
+    def __str__(self):
+        return f"domain not specified for service '{self.service}'"
+
 
 @dataclass
 class AppCallbackFail(AppDaemonException):

From 15bb36a2ed82d6c2e537483a4232767e8471b4b0 Mon Sep 17 00:00:00 2001
From: John Lancaster <32917998+jsl12@users.noreply.github.com>
Date: Sat, 7 Jun 2025 11:59:56 -0500
Subject: [PATCH 2/2] linting

---
 appdaemon/exceptions.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/appdaemon/exceptions.py b/appdaemon/exceptions.py
index caf4e1dfc..ca4dbb812 100644
--- a/appdaemon/exceptions.py
+++ b/appdaemon/exceptions.py
@@ -231,7 +231,7 @@ def __str__(self):
 class DomainNotSpecified(AppDaemonException):
     namespace: str
     service: str
-    
+
     def __str__(self):
         return f"domain not specified for service '{self.service}'"