The PermissionError: [Errno 13] Permission denied usually means your Python code (or sub-agent) doesn’t have the proper rights or file path access to write to the target file.

Here are the most common causes and fixes:

Check file path and permissions

Make sure your sub-agent is writing to a path it actually has access to.

file_path = "/path/to/output.txt"
with open(file_path, "w") as f:
    f.write("Hello World!")

If this path is inside a restricted system folder (e.g., /root, C:\Program Files, etc.), you’ll get Permission denied.

Fix:

• Use a user-writable path like /tmp, ./data/, or os.getcwd()

• Example:

import os
file_path = os.path.join(os.getcwd(), "output.txt")
with open(file_path, "w") as f:
    f.write("Works fine!")