The checkout form and payment-method lookup were hardcoded to the live
payment router, so any local LMS (next dev included) created real
orders: a stray test click on 20261111 produced order 1794380127.
- resolvePayBase(): NEXT_PUBLIC_PAY_BASE_URL if set, otherwise the live
router for production builds and /dev/pay-stub for everything else.
- /dev/pay-stub/pay/{methods,order}: dev-only stand-ins (404 in
production) that make no outbound calls and store nothing.
- Document in CLAUDE.md that a local `next build && next start` still
hits the live router unless NEXT_PUBLIC_PAY_BASE_URL is set.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
adminsandClaude Opus 5.5
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