Preview v1.0 · not full paid checkout activation
Download the correct upgrade system
Both free and paid checkouts should return here (or production successor). You download one pack. You do not scrape random site folders.
Free School Golden Ticket (correct free system)
v1.6.14R5c — FIN1 free forever commercial lock (owner GO 2026-08-18).
MATH1 · CALC1 · CEL1 · ES1 · FIN1 — free forever offline after claim.
Claim free 5-cart downloadSHA-256: E202E62A8B19388251647EA87246F9974024F5629888D785AD43AB59E263FA2F
Paid STEM / specialty upgrades
After payment entitlement (when activated), download only the lab-published STEM upgrade pack. Checkout remains held until a payment GO.
Placeholder: STEM upgrade pack not auto-activated here. Use holder STEM preview cards + future upgrade ZIP with published SHA.
OneCharacterCode retrofits
Retrofits are tested on Bret systems first, then registered by SHA. Admin panel installs them — users do not download raw OCC lab stubs from random paths.
Admin backup / restore panel