Free gives you a public starting point and curriculum. Pro unlocks the full learning runtime and AI features. Mentor adds human review and support without replacing evidence.
A plan changes tool access, not mastery rules: a capability is demonstrated only after evidence.
Validation does not change the plan. Redeeming creates a redemption and passes it to checkout.
First see whether the code applies and how it changes the amount. Then redeem it for checkout.
The Frontend / Backend / Mobile curriculum is public. Payment is required only where paid access actually begins.