chore(root): use PID

scripts/iris.zsh

@@ -0,0 +1,14 @@
+# iris zsh fast IPC integration
+
+if [[ -n "$IRIS_FD" ]]; then
+  _iris_send_lbuffer() {
+    # -u $IRIS_FD writes to the pipe file descriptor set up by Iris wrappers
+    # -N appends a null byte '\0' instead of newline (perfect for parsing)
+    # -r prints raw string
+    print -u $IRIS_FD -N -r -- "$LBUFFER" 2>/dev/null
+  }
+
+  autoload -Uz add-zle-hook-widget
+  # Hook into ZLE so this runs absolutely every time the line buffer changes
+  add-zle-hook-widget line-pre-redraw _iris_send_lbuffer
+fi