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live_delta.py exists for the freeze: a frozen run is guest code spinning, and spinning code waits on guest memory, so the words still changing while frozen should be the loop's own bookkeeping and whatever it polls. Measured control on a RUNNING game, so the frozen number has something to be compared against: 1863296 words change in 4 s, 2.08% of the 357.7 MB of data extents. The sparse 4.6 GB costs nothing - the walk is over SEEK_DATA extents. The freeze did not reproduce this run, so the frozen half of that measurement is still owed. ob_flag.py: an unreadable HUD frame is now retried rather than counted as a mismatch. ob_read returns None on a frame it cannot read - an explosion across the plate, a flash - and the sanity check treated that as "the address is wrong" and aborted a perfectly good run. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PMRJjbxLqZtsb5Vb7KunPE