[BUG] Typing new prompt interrupts previous prompt, leaving it unfinished

If I type a new prompt while a previous prompt is not yet completed, the remaining steps needed to complete the previous prompt are never finished, unless I start my new prompt with "Once you have finished what you are doing, ...", or end it with " -- and then once you have done that, go back and finish what you were working on before".

Without these sorts of prompt augmentations, the unfinished work may never get finished, and there is no indication that your project may be in a broken state because there was unfinished work.

Ideally the new prompt would get interpreted in the context of all previous prompts, and the current partial completion state of the actively running prompt, so that the current TODO list would get augmented, but without halting work-in-progress (maybe just changing what happens from that point on, but without leaving work undone).