diff --git a/crates/ide-host/src/notebook.rs b/crates/ide-host/src/notebook.rs
index fb5d65cb..413bb3c9 100644
--- a/crates/ide-host/src/notebook.rs
+++ b/crates/ide-host/src/notebook.rs
@@ -1,7 +1,7 @@
 //! Project-incarnation notebook ownership and whole-batch execution admission.
 use crate::ops::Channel;
 use ide_core::error::ErrorKind;
-use ide_core::{CancellationToken, IdeError, IdeEvent, IdeResult, SharedSink};
+use ide_core::{CancellationToken, IdeError, IdeEvent, IdeResult, IpcPath, SharedSink};
 use ide_notebook::kernel::{KernelManager, KernelOutput};
 use ide_notebook::{NotebookDocument, NotebookEdit, NotebookSnapshot};
 use parking_lot::Mutex;
@@ -17,7 +17,7 @@ use tokio::sync::{Mutex as AsyncMutex, watch};
 #[serde(rename_all = "camelCase")]
 pub struct NotebookOutputEvent {
     pub id: String,
-    pub path: String,
+    pub path: IpcPath,
     pub cell: String,
     pub msg_id: String,
     pub kind: String,
@@ -536,7 +536,7 @@ fn commit_output(
     };
     Ok(Some(NotebookOutputEvent {
         id: document.id.clone(),
-        path: document.path.to_string_lossy().into_owned(),
+        path: document.path.clone().into(),
         cell: cell.to_owned(),
         msg_id: output.msg_id,
         kind: output.kind,
@@ -592,6 +592,16 @@ mod tests {
         other.shutdown().await;
     }
 
+    #[tokio::test]
+    async fn the_notebook_path_reaches_the_ui_as_the_project_tree_names_it() {
+        let (dir, service, _) = fixture();
+        let ui_path =
+            format!("{}/session.ipynb", ide_core::ipc_path::to_ipc(&dunce::canonicalize(dir.path()).unwrap()));
+        let snapshot = service.open(Path::new(&ui_path)).unwrap();
+        assert_eq!(serde_json::to_value(&snapshot).unwrap()["path"], ui_path);
+        service.shutdown().await;
+    }
+
     #[tokio::test(start_paused = true)]
     async fn failed_close_keeps_the_incarnation_recoverable_until_a_retry_succeeds() {
         let (dir, service, initial) = fixture();
diff --git a/crates/ide-notebook/src/document.rs b/crates/ide-notebook/src/document.rs
index 9eb32842..85d7661f 100644
--- a/crates/ide-notebook/src/document.rs
+++ b/crates/ide-notebook/src/document.rs
@@ -9,7 +9,7 @@ use std::{
     time::{Duration, Instant},
 };
 
-use ide_core::{IdeError, IdeResult, error::ErrorKind};
+use ide_core::{IdeError, IdeResult, IpcPath, error::ErrorKind};
 use serde::{Deserialize, Serialize};
 use serde_json::{Value, json};
 use specta::Type;
@@ -22,7 +22,7 @@ use crate::kernel::KernelOutput;
 #[serde(rename_all = "camelCase")]
 pub struct NotebookSnapshot {
     pub id: String,
-    pub path: String,
+    pub path: IpcPath,
     pub version: u32,
     pub dirty: bool,
     pub can_undo: bool,
@@ -188,7 +188,7 @@ impl NotebookDocument {
     pub fn snapshot(&self) -> NotebookSnapshot {
         NotebookSnapshot {
             id: self.id.clone(),
-            path: self.path.to_string_lossy().into_owned(),
+            path: self.path.clone().into(),
             version: self.version,
             dirty: self.is_dirty(),
             can_undo: !self.execution_active && !self.undo.is_empty(),
diff --git a/src/bindings.ts b/src/bindings.ts
index 1fb74b18..39dfd584 100644
--- a/src/bindings.ts
+++ b/src/bindings.ts
@@ -5342,7 +5342,7 @@ export type NotebookEdit = { type: "setSource"; cell: string; source: string } |
 
 export type NotebookOutputEvent = {
 	id: string,
-	path: string,
+	path: IpcPath,
 	cell: string,
 	msgId: string,
 	kind: string,
@@ -5354,7 +5354,7 @@ export type NotebookOutputEvent = {
 
 export type NotebookSnapshot = {
 	id: string,
-	path: string,
+	path: IpcPath,
 	version: number,
 	dirty: boolean,
 	canUndo: boolean,