Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

branch protection

Repository rules that stop anyone merging to main until reviews and CI checks pass.

Branch protection rules require pull requests, approvals and passing status checks before changes reach a protected branch.