## Summary I want to add a new RTS message like `CloneStackMessage` to ask a TSO to update its flags/a specific flag. My goal, ultimately, is to be able to toggle breakpoint related TSO flags. Setting another TSO’s flags is necessary to implement Pausing and Per-thread single stepping (which enable the Multi-threaded debugging vision #26064). I intend to post an MR tomorrow. This should be a rather simple change, just adding a new type of RTS Messages which can be executed by a capability. I expect it's an uncontentious change. This ticket tracks the plan