Create a new workspace and immediately open a Stripe Checkout session for it.
Used when the caller already owns a free workspace and wants to create an additional paid workspace. The workspace is provisioned with plan=“free” first; the webhook handler upgrades it to the chosen plan once Stripe confirms payment.
Requires: session auth, Stripe enabled.
Documentation Index
Fetch the complete documentation index at: https://docs.riftmap.dev/llms.txt
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