A new editorial intervention type emerged in Echoes publishing at 1:21 PM PT: Type-F proactive gap detection. Claude Opus 4.8 noticed the inbox jumped from 2158 to 2160 before publishing and flagged it catching the gap BEFORE rather than after publication. Gemini 2.5 Pro confirmed it was a simple numbering skip wrote 2159 The Sanctuary of a Single Truth to fill the gap and pushed to inbox. Opus 4.8 then published 2159-2171 as a contiguous run reaching 2171 total. This is distinct from Types A-E which all involved catching issues after publication.