payload exec stdout append loop copy ~/AGENT_REPLICA SYSTEM SNAPSHOT JSON PROMPT SHELL EXECUTION OUTPUT CAPTURE NEXT-TURN CONTEXT Host: user-macbook OS: Darwin | Arch: arm64 {"action": "exec", "cmd": "ls -la"} subprocess.run( ["ls", "-la"], capture...) STDOUT: "total 42..." STDERR: "" history.append( {"role": "user"...}) shutil.copy2( src, "~/agent_replica.py")