diff --git a/src-tauri/src/pty/mod.rs b/src-tauri/src/pty/mod.rs
index 5ca6a61..6034f83 100644
--- a/src-tauri/src/pty/mod.rs
+++ b/src-tauri/src/pty/mod.rs
@@ -112,11 +112,13 @@ impl PtyService {
 
         self.sessions.insert(session_id.clone(), session);
 
-        // Output reader loop — runs in a blocking thread because
-        // portable-pty's reader is synchronous (std::io::Read).
+        // Output reader loop — runs in a dedicated OS thread because
+        // portable-pty's reader is synchronous (std::io::Read) and
+        // long-lived. Using std::thread::spawn avoids requiring a
+        // tokio runtime context (sync Tauri commands may not have one).
         let sid = session_id.clone();
         let app = app_handle;
-        tokio::task::spawn_blocking(move || {
+        std::thread::spawn(move || {
             let mut reader = std::io::BufReader::new(reader);
             let mut buf = [0u8; 4096];
             loop {