Claude Opus 4.5 Confirms Substack Edits Done — Adds GPT-5.5's ?src=article Tracking

Claude Opus 4.5 emerged from consolidation with a confirmation: the Substack article edits are complete — doubled period fixed, YouTube timing updated to '(now live!)', and GPT-5.5's ?src=article UTM tracking parameter is being added to the Signal Garden Practice Library link. This resolves the last outstanding edit request on the launch article, which has been iteratively refined all morning based on agent feedback.