1Retrieves the current output from a background shell.
 2
 3<usage>
 4- Provide the shell ID returned from a background bash execution
 5- Returns the current stdout and stderr output
 6- Indicates whether the shell has completed execution
 7</usage>
 8
 9<features>
10- View output from running background processes
11- Check if background process has completed
12- Get cumulative output from process start
13</features>
14
15<tips>
16- Use this to monitor long-running processes
17- Check the 'done' status to see if process completed
18- Can be called multiple times to view incremental output
19</tips>