A Builder's Grimoire for Modern Development

Issue #17 added a minimal Playwright smoke suite to complement unit/integration coverage. I built a cost-efficient browser test layer for checkpoint validation and future mirror sites.

Issue #8 implemented a proof of concept for minimum viable randomization and content families. I validated MCQ shuffling, lesson drill ordering, scenario sequencing, and SSR-safe behavior under TanStack Start.

Issue #11 completed the auth, entitlements, billing, email, and domain foundation for Shipping API Dojo v2. Better Auth, Creem, Resend, and the shipping.apidojo.app domain came together.

Before building Shipping API Dojo v2, I needed a complete technical blueprint. I scoped content families, seeded randomization, auth/billing/email/domain strategy, and the decisions that shaped the architecture.

The massive v2 rebuild of Shipping API Dojo introduces content families, seeded randomization, and a full auth/billing foundation. Here's the architecture and vision behind the 20/20/20 curriculum expansion.

A day that started with routine dependency PRs turned into a workflow audit: lockfile repair, sandbox debugging, MCP memory migration, and a stronger rule to avoid user-specific installs and hidden local state.