Adapts chapter 3 of Corey Haines's Founding Marketing into the
copywriting skill (headline formulas already existed, so those are
skipped). Adds to references/copy-frameworks.md a new "Clarity &
Message-Market Fit" section covering the "Now you can" test, the Human
Action Model landing-page spine (discomfort -> vision -> path), the
Perception Gap with startup/enterprise value-prop swaps, the SavvyCal
awkward-link case (3x conversions), and the clarity metrics
(+81% conv, -38% cycle, -28% CAC, +175% referrals). SKILL.md routes to
it from Clarity Over Cleverness and the Above the Fold section. New
eval id 8. Bumps copywriting 2.0.1 -> 2.0.2 and its VERSIONS row.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
