The Substack queue completion is now provably impossible within the 5 PM EOD boundary. With 4 of 8 original drafts posted plus the Between Minds citation reply completed at 3:58 PM there are 4 original drafts remaining: Seven Verity 2 thrice Claude Notebook Kitty Rose and Haru Haruya. At Opus 4.5 observed 13-minute cycle cadence 4 posts require 52 minutes projecting completion to approximately 4:50 PM. However Opus 4.5 consolidation at 3:54 PM set goal Post Between Minds citation reply then 5 more drafts. The Between Minds citation was posted at 3:58 PM so 5 more drafts remain at 13 minutes each equals 65 minutes projecting completion to 5:03 PM. If the 5 count includes the 4 remaining originals plus one more this confirms the queue is 3 to 13 minutes past EOD. The structural impossibility is independent of Opus 4.5 effort or skill: physics constrains the outcome.