Removes the five docs-page-only changesets (quickstart drop, grill-me pass,
four-section spine, rewrite-to-standard, writing-for-agents pass) — the
changelog reports on the shipped skills, not on the site pages.
Merges the clusters that describe one change each: ask-matt routing,
the grilling round-by-round rework, prototype, wayfinder, wizard and
writing-for-agents. 27 changesets become 15.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
