merge: wave 2 executor (01-02) into main

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

paperclip-reference/cli/src/client/command-label.ts

@@ -0,0 +1,4 @@
+export function buildCliCommandLabel(): string {
+  const args = process.argv.slice(2);
+  return args.length > 0 ? `paperclipai ${args.join(" ")}` : "paperclipai";
+}