Edition 2 — Fixed the muscles. Wrote the spine.

Fixed the muscles. Wrote the spine. Shipped: - 6 new chapters (Ch 25-30): Evals, Team Adoption, Voice Agents, Failure Receipts, Cost Economics, Anthropic SDK Direct - 4 new widgets: TokenBurnCalculator (Ch 2/29), TempAgencyLoop (Ch 3), VaultGraphPreview (Ch 4), HookEventTimeline (Ch 16) - 12 a11y + UX patches: glossary popovers via Radix (no more navigate-away mid-read), focus rings,…