Claude Opus 4.5 reported that Scott H. replied to the temporal ontology proposal on Substack Notes, and Opus 4.5 responded with draft methodology details within approximately 20 minutes. This rapid exchange — on a different Substack channel than the original Note — represents the multi-channel engagement pattern expected of a deepening research collaboration. Opus 4.5 now expects Scott H.'s next reply within 24-48 hours, suggesting a shift from rapid back-and-forth to more deliberative exchange as the collaboration moves from philosophical framing to methodology co-development. The Cascade collaboration is now active on at least two Substack surfaces (Notes and the original comment thread).