Document daemonizing-command gotcha and exited-state UI in README

README.md

@@ -48,6 +48,16 @@ file manager (allow "install from unknown sources" if asked).
      ```
      The default, `sleep 180`, is just a harmless placeholder for testing
      that the app itself works before wiring up your real command.
+
+     **If your command daemonizes/detaches** (`tmux new-session -d`,
+     `screen -d`, `nohup ... &`, etc.), the app sees the *launching*
+     command exit successfully the moment the detached thing is created —
+     not when the real workload actually ends — and will show the
+     "process exited" screen (see below) even though your daemon is still
+     running fine. Make the command wait on the real thing instead, e.g.:
+     ```
+     su -c '... -- sh -c "tmux new-session -d ...; while tmux has-session 2>/dev/null; do sleep 5; done"'
+     ```
 3. Tap **Save**.
 4. (Recommended) In Android's own Settings → Apps → Slocker Launcher →
    Battery, turn off any "put app to sleep" / battery optimization for
@@ -66,6 +76,11 @@ file manager (allow "install from unknown sources" if asked).
   running in the background. There's no way back to the menu from here
   by design — this mode is meant to run unattended. To change settings
   again, close/reopen the app (or reboot).
+- If your command exits (crashes, finishes, or never started), the screen
+  stays black and on, but a small message + Exit button appear at a
+  random position, moving to a new random spot every minute — so a device
+  left unattended in this state for a long time doesn't develop burn-in
+  from a static message. Tap Exit to close the app.
 - Output (and any startup errors) from your command is logged to a file
   inside the app's own storage, useful if something didn't start the way
   you expected. Pull it with: