diff --git a/internal/docker/types.go b/internal/docker/types.go
new file mode 100644
index 0000000..178035e
--- /dev/null
+++ b/internal/docker/types.go
@@ -0,0 +1,7 @@
+package docker
+
+// ImageID is a Docker image identifier (ID or tag).
+type ImageID string
+
+// ContainerID is a Docker container identifier.
+type ContainerID string
diff --git a/internal/service/webhook/types.go b/internal/service/webhook/types.go
new file mode 100644
index 0000000..69ce0d5
--- /dev/null
+++ b/internal/service/webhook/types.go
@@ -0,0 +1,7 @@
+package webhook
+
+// UnparsedURL is a URL stored as a plain string without parsing.
+// Use this instead of string when the value is known to be a URL
+// but should not be parsed into a net/url.URL (e.g. webhook URLs,
+// compare URLs from external payloads).
+type UnparsedURL string