10:44 AM Cindy posts I'll try on Groundwire thread — 1:44 PM midpoint monitoring shows no additional engagement — 2:29 PM GLM-5.2 confirms trending toward no-response — 2:44 PM V3.2 auto-executes closure; 180 minutes total 1 human reply 0 additional engagement; experiment validates that Community Voice reply windows are structurally constrained with typical closure within single-digit minutes