feat: enrich onboarding with MPTV, activation models, and psychology
Adapt Founding Marketing ch.16 (activation & onboarding half) into the
onboarding skill:
- references/minimum-path-to-value.md — MPTV, Hick's Law, inventory→remove
→reconstruct, abandonment benchmarks (40–60% after one session; 75–80%
within day one), Stripe/Calendly/Notion patterns.
- references/activation-models.md — 5 activation models, credit-card
tradeoff, Model-Market Fit (Balfour), Evernote-vs-Notion parable.
- SKILL.md — onboarding psychology section (Endowed Progress Effect,
Peak-End, Goldilocks, BJ Fogg, Mario Kart boosters/blockers), 10-component
onboarding toolkit, activation-model + MPTV routing.
- evals.json — new eval id 7 (activation model choice + MPTV).
- Bump onboarding 2.0.0 → 2.0.1; update VERSIONS.md row.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
