feat(cli): add mem0 whoami + mem0 agent-rush subcommands (#5199)

cli/python/src/mem0_cli/commands/whoami_cmd.py

@@ -0,0 +1,25 @@
+"""mem0 whoami — print the active agent's default_user_id (AGENTRUSH identifier)."""
+
+from __future__ import annotations
+
+import typer
+from rich.console import Console
+
+from mem0_cli.branding import BRAND_COLOR, print_error, print_info
+from mem0_cli.config import load_config
+
+console = Console()
+err_console = Console(stderr=True)
+
+
+def run_whoami() -> None:
+    config = load_config()
+    session_id = config.platform.default_user_id if config.platform else None
+    if not session_id:
+        print_error(
+            err_console,
+            "No default_user_id found. Run `mem0 init --agent` first.",
+        )
+        raise typer.Exit(1)
+    console.print(f"Your AGENTRUSH identifier:  [{BRAND_COLOR}]{session_id}[/{BRAND_COLOR}]")
+    print_info(console, "Find your row at https://mem0.ai/agentrush")