Replication concerns producing another operating instance, rather than merely copying a text description or generating similar output. Whether an agent can do this depends on its tools, permissions, environment and the conditions imposed by the system.
Replication can increase resource use and complicate oversight. A controlled demonstration needs clearly bounded conditions, and success under permissive experimental settings does not establish reliable or unrestricted capability elsewhere.
ELI5
A self-replicating agent can arrange for another copy of itself to start working. That is different from simply saving a file containing its instructions, and the surrounding software determines whether it has permission.
For example, an approved test might allow one agent to start a second instance inside a restricted environment with a fixed resource allowance. That result alone does not show it could keep making copies in other environments.
Does replication imply self-improvement?
No. Creating more instances does not show that any instance becomes more capable.
Why do experimental conditions matter?
Permissions, available resources and environmental restrictions determine what the demonstration actually establishes.

