• product-marketing (2.0.0 → 2.1.0): the context document now carries its own version history. .agents/product-marketing.md gets a Document version: header (v1, v2 …) and a ## Changelog section at the bottom — a newest-first, dated, one-line-per-revision paper trail of what changed and why. The update flow now reads the current version and recent changelog on open, and on save bumps the version, updates Last updated, and prepends a new changelog entry naming the sections touched and the reason (never rewriting past entries; skipped only for pure typo fixes). Since this doc is the shared context every other marketing skill reads, the changelog makes positioning/ICP changes traceable across a project — you can see how the positioning evolved and what a downstream skill was generating against. New eval (id 7) covers the version-bump + prepend-changelog behavior on a repositioning update.