diff --git a/apps/cli/src/domains/file.rs b/apps/cli/src/domains/file.rs
index 246b15bc5..17664fae5 100644
--- a/apps/cli/src/domains/file.rs
+++ b/apps/cli/src/domains/file.rs
@@ -58,7 +58,7 @@ pub async fn run(ctx: &Context, cmd: FileCmd) -> Result<()> {
 			if let Err(errors) = input.validate() {
 				anyhow::bail!(errors.join("; "))
 			}
-			ctx.core.action(&input).await?;
+			let _bytes = ctx.core.action(&input).await?;
 			println!("Copy request submitted");
 		}
 	}
diff --git a/apps/cli/src/main.rs b/apps/cli/src/main.rs
index f90154e08..15a5744fc 100644
--- a/apps/cli/src/main.rs
+++ b/apps/cli/src/main.rs
@@ -131,7 +131,7 @@ async fn main() -> Result<()> {
 			if let Err(errors) = input.validate() {
 				anyhow::bail!(errors.join("; "));
 			}
-			core.action(&input).await?;
+			let _bytes = core.action(&input).await?;
 			println!("Copy request submitted");
 		}
 	}
diff --git a/apps/graphql/src/main.rs b/apps/graphql/src/main.rs
index 46ad9b4d3..cf9f7ea9c 100644
--- a/apps/graphql/src/main.rs
+++ b/apps/graphql/src/main.rs
@@ -59,7 +59,7 @@ impl MutationRoot {
 		let mut input = sd_core::ops::files::copy::input::FileCopyInput::default();
 		input.sources = sources.into_iter().map(Into::into).collect();
 		input.destination = destination.into();
-		state
+		let _bytes = state
 			.core
 			.action(&input)
 			.await
diff --git a/core/src/client/mod.rs b/core/src/client/mod.rs
index e1529f79e..1dfee1745 100644
--- a/core/src/client/mod.rs
+++ b/core/src/client/mod.rs
@@ -23,7 +23,7 @@ impl CoreClient {
 		}
 	}
 
-	pub async fn action<A>(&self, action: &A) -> Result<()>
+	pub async fn action<A>(&self, action: &A) -> Result<Vec<u8>>
 	where
 		A: Wire + Serialize,
 	{
@@ -37,7 +37,7 @@ impl CoreClient {
 			.await;
 		match resp {
 			Ok(r) => match r {
-				DaemonResponse::Ok(_) => Ok(()),
+				DaemonResponse::Ok(bytes) => Ok(bytes),
 				DaemonResponse::Error(e) => Err(anyhow::anyhow!(e)),
 				other => Err(anyhow::anyhow!(format!("unexpected response: {:?}", other))),
 			},
diff --git a/core/src/infra/job/handle.rs b/core/src/infra/job/handle.rs
index 52c09f7a3..246f30d67 100644
--- a/core/src/infra/job/handle.rs
+++ b/core/src/infra/job/handle.rs
@@ -103,6 +103,16 @@ impl JobHandle {
     }
 }
 
+// Serialize JobHandle as its JobId for wire transport
+impl serde::Serialize for JobHandle {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        self.id.serialize(serializer)
+    }
+}
+
 /// Update events from a job
 #[derive(Debug)]
 pub enum JobUpdate {
diff --git a/core/src/ops/registry.rs b/core/src/ops/registry.rs
index 64d70af0e..ec0a9e361 100644
--- a/core/src/ops/registry.rs
+++ b/core/src/ops/registry.rs
@@ -113,9 +113,10 @@ pub fn handle_library_action<A>(
 where
 	A: crate::infra::action::LibraryAction + 'static,
 	A::Input: DeserializeOwned + 'static,
+	A::Output: serde::Serialize + 'static,
 {
 	use bincode::config::standard;
-	use bincode::serde::decode_from_slice;
+	use bincode::serde::{decode_from_slice, encode_to_vec};
 	(async move {
 		let input: A::Input = decode_from_slice(&payload, standard())
 			.map_err(|e| e.to_string())?
@@ -123,11 +124,11 @@ where
 		let action = A::from_input(input)?;
 		let manager = crate::infra::action::manager::ActionManager::new(core.context.clone());
 		let library_id = session.current_library_id.ok_or("No library selected")?;
-		manager
+		let out = manager
 			.dispatch_library(library_id, action)
 			.await
 			.map_err(|e| e.to_string())?;
-		Ok(Vec::new())
+		encode_to_vec(&out, standard()).map_err(|e| e.to_string())
 	})
 	.boxed_local()
 }
@@ -141,20 +142,21 @@ pub fn handle_core_action<A>(
 where
 	A: crate::infra::action::CoreAction + 'static,
 	A::Input: DeserializeOwned + 'static,
+	A::Output: serde::Serialize + 'static,
 {
 	use bincode::config::standard;
-	use bincode::serde::decode_from_slice;
+	use bincode::serde::{decode_from_slice, encode_to_vec};
 	(async move {
 		let input: A::Input = decode_from_slice(&payload, standard())
 			.map_err(|e| e.to_string())?
 			.0;
 		let action = A::from_input(input)?;
 		let manager = crate::infra::action::manager::ActionManager::new(core.context.clone());
-		manager
+		let out = manager
 			.dispatch_core(action)
 			.await
 			.map_err(|e| e.to_string())?;
-		Ok(Vec::new())
+		encode_to_vec(&out, standard()).map_err(|e| e.to_string())
 	})
 	.boxed_local()
 }