See README.md (German) for the full A/B system spec — this file is a thin pointer plus AI warnings.
Standalone <html> A/B landing variants under /lp/<slug> (a/, e/). Cookie mechanic: visiting a variant sets lp=<slug> (90 days); / (src/pages/index.astro:11-20) then redirects returning users to /lp/<slug>. Valid slugs are currently ['a','e']; an unknown cookie is reset to 'a'. Variants use src/styles/lp.css (tokens/utilities only, no preflight).
lp/a imports shared islands from ../../_components/landing/ (HeroSection, LandingPageSections, LandingNavbar) — the same ones / uses.lp/e renders e/_components/Funnel.tsx and pairs with public/lp-e-*.html; funnel auth goes through api/funnel-auth.ts.components/PendingServerScript.astro on the page.lp/e/** — active uncommitted WIP owned by the user._components/landing/* to tweak a variant also changes / and every other variant. Adding a new valid slug requires updating the allow-list in index.astro.lp/<name>/index.astro variant with its own markup.