Platform Norm Profiler Maintains the dated, versioned per-platform norm cards the Craft phase drafts against — char limits, visible-fold cutoffs, hashtag norms, format/aspect specs, link and first-comment placement, disclosure-label mechanics, and algorithm emphases — every row labeled platform-documented (Measured, official doc) or Estimated-folklore (named source) with a last-verified date. It feeds four ECHO sub-items directly: the three C dated-norm-card items — platform adaptation, never verbatim cross-posting (C3), format specs citing the dated card (C4), and link/first-comment placemen…