Security. Both “OK” and “up” were allowed by the format check. That gave each line room to carry one encrypted bit. In this test, restricting the allowed wording still let a secret through. Whether a reader or another monitor would notice the pattern remains open.

The model generated the tokens in this recording. The player decodes them into the warp, program block, instruction stages, four register lanes, and global-memory writes using the qwenGPU monitor's record format. A dot means the stream has not reported a register value. The left pane explains the experiment. The result card is an end-of-trial summary. Recorded compute time covers the launches and their checks; loading and compilation are separate. Guided playback speeds up long trials and advances between launches automatically.