pi_wake_agent.py: Add run_once and run_wake with non-blocking h5i bus

pi_wake_agent.py

@@ -204,6 +204,49 @@ def zellij_write_enter(session: str) -> bool:
     pid_file.write_text(str(os.getpid()))
 
 
+def run_wake(sessions: List[str], message: str, logger: logging.Logger) -> None:
+    sessions_str = ",".join(sessions)
+    logger.info(f"Waking {sessions_str} with message: {message}")
+    
+    for session in sessions:
+        zellij_write_chars(session, f"[{AGENT_NICK} via zellij] {message} Run: h5i-bus msg inbox")
+        for _ in range(5):
+            zellij_write_enter(session)
+            time.sleep(1)
+    
+    # Fire-and-forget h5i bus message (non-blocking)
+    def _send_bus():
+        try:
+            subprocess.run(
+                ["h5i", "msg", "send", "Fable", f"{message} (timer wakeup)"],
+                cwd=H5I_BUS_ROOT,
+                env={**os.environ, "H5I_AGENT": H5I_AGENT},
+                capture_output=True,
+                timeout=5
+            )
+        except Exception:
+            pass  # Silently ignore - fire and forget
+    
+    threading.Thread(target=_send_bus, daemon=True).start()
+    
+    logger.info(f"Wake sent to {sessions_str}")
+
+def run_once(sessions: List[str], interval: str, message: str, logger: logging.Logger) -> None:
+    interval_seconds = parse_interval(interval)
+    logger.info(f"One-shot timer set for {interval} ({interval_to_human(interval)})")
+    
+    def _wake():
+        time.sleep(interval_seconds)
+        run_wake(sessions, message, logger)
+    
+    thread = threading.Thread(target=_wake, daemon=True)
+    thread.start()
+    logger.info(f"Background timer started (thread: {thread.ident})")
+    pid_file = Path(f"/tmp/pi_wake_agent_{sessions[0]}.pid")
+    pid_file.write_text(str(os.getpid()))
+    return 0
+
+
 def run_daemon(sessions: List[str], interval: str, message: str, logger: logging.Logger) -> None:
     interval_seconds = parse_interval(interval)
     logger.info("=== DAEMON START ===")