diff --git a/src/daemon.rs b/src/daemon.rs
index 0e701b6..33e373a 100644
--- a/src/daemon.rs
+++ b/src/daemon.rs
@@ -361,6 +361,22 @@ fn is_missing_working_dir_error(error: &AutterError) -> bool {
     }
 }
 
+/// Returns true when the error comes from a full disk on the host (ENOSPC on
+/// Unix, ERROR_DISK_FULL on Windows). That is an environment condition on the
+/// user's machine, not a daemon fault, so side-effect failures with this cause
+/// log at warn level and do not become error-tracking exceptions.
+fn is_storage_full_error(error: &AutterError) -> bool {
+    matches!(error, AutterError::IoError(io_error) if io_error.kind() == std::io::ErrorKind::StorageFull)
+}
+
+fn log_side_effect_error(error: &AutterError, family: &str, seq: u64, message: &str) {
+    if is_storage_full_error(error) {
+        tracing::warn!(%error, %family, seq, "{message}: host disk is full");
+    } else {
+        tracing::error!(%error, %family, seq, "{message}");
+    }
+}
+
 /// Returns true when a side effect failed because its repository was deleted
 /// mid-operation. git reports this race in more shapes than
 /// `is_missing_working_dir_error` knows (for example `git diff` exits 1 with
@@ -6100,11 +6116,11 @@ impl ActorDaemonCoordinator {
                         Ok(Ok((applied, side_effect_result))) => {
                             if let Err(error) = &side_effect_result {
                                 let _ = self.record_side_effect_error(family, order, error);
-                                tracing::error!(
-                                    %error,
-                                    %family,
-                                    seq = applied.seq,
-                                    "command side effect failed"
+                                log_side_effect_error(
+                                    error,
+                                    family,
+                                    applied.seq,
+                                    "command side effect failed",
                                 );
                             }
                             if let Err(error) = self.append_command_completion_log(
@@ -7864,11 +7880,11 @@ impl ActorDaemonCoordinator {
                     let _ = self.end_family_effect(&family);
                     if let Err(error) = result {
                         let _ = self.record_side_effect_error(&family, applied.seq, &error);
-                        tracing::error!(
-                            %error,
-                            %family,
-                            seq = applied.seq,
-                            "async side-effect error"
+                        log_side_effect_error(
+                            &error,
+                            &family,
+                            applied.seq,
+                            "async side-effect error",
                         );
                     } else if let Err(error) =
                         self.append_command_completion_log(&family, &applied, &Ok(()), applied.seq)
@@ -9448,6 +9464,29 @@ mod tests {
         )));
     }
 
+    #[test]
+    fn storage_full_error_detects_disk_full_io_errors() {
+        let disk_full = AutterError::IoError(std::io::Error::new(
+            std::io::ErrorKind::StorageFull,
+            "No space left on device (os error 28)",
+        ));
+        assert!(is_storage_full_error(&disk_full));
+
+        #[cfg(unix)]
+        assert!(is_storage_full_error(&AutterError::IoError(
+            std::io::Error::from_raw_os_error(28)
+        )));
+
+        let permission_denied = AutterError::IoError(std::io::Error::new(
+            std::io::ErrorKind::PermissionDenied,
+            "access denied",
+        ));
+        assert!(!is_storage_full_error(&permission_denied));
+        assert!(!is_storage_full_error(&AutterError::Generic(
+            "No space left on device".to_string()
+        )));
+    }
+
     fn init_fake_repo(worktree: &Path) {
         fs::create_dir_all(worktree.join(".git").join("objects")).unwrap();
         fs::write(worktree.join(".git").join("HEAD"), "ref: refs/heads/main\n").unwrap();