storkit: merge 377_bug_update_story_mcp_tool_writes_front_matter_values_as_yaml_strings_instead_of_native_types

server/src/agents/gates.rs

@@ -102,13 +102,29 @@ fn run_command_with_timeout(
     args: &[&str],
     dir: &Path,
 ) -> Result<(bool, String), String> {
-    let mut child = Command::new(program)
-        .args(args)
+    // On Linux, execve can return ETXTBSY (26) briefly after a file is written
+    // before the kernel releases its "write open" state. Retry once after a
+    // short pause to handle this race condition.
+    let mut last_err = None;
+    let mut cmd = Command::new(&program);
+    cmd.args(args)
         .current_dir(dir)
         .stdout(std::process::Stdio::piped())
-        .stderr(std::process::Stdio::piped())
-        .spawn()
-        .map_err(|e| format!("Failed to spawn command: {e}"))?;
+        .stderr(std::process::Stdio::piped());
+    let mut child = loop {
+        match cmd.spawn() {
+            Ok(c) => break c,
+            Err(e) if e.raw_os_error() == Some(26) => {
+                // ETXTBSY — wait briefly and retry once
+                if last_err.is_some() {
+                    return Err(format!("Failed to spawn command: {e}"));
+                }
+                last_err = Some(e);
+                std::thread::sleep(std::time::Duration::from_millis(50));
+            }
+            Err(e) => return Err(format!("Failed to spawn command: {e}")),
+        }
+    };
 
     // Drain stdout/stderr in background threads so the pipe buffers never fill.
     let stdout_handle = child.stdout.take().map(|r| {