feat(autumn): plan catalog, eligibility, and hosted checkout flow#7
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Extends the Autumn emulator beyond customers and usage so it can drive the billing UI: - Seedable plan catalog returned by plans.list, with per-customer customer_eligibility (status, attach_action, trialing, trial_available) computed from the customer's subscriptions. - billing.attach and billing.open_customer_portal. A paid plan or a card-required free trial routes attach through a hosted checkout page. - Hosted checkout: GET /checkout/:id renders via the shared renderCheckoutPage, POST /checkout/:id/complete redirects to success_url WITHOUT activating, and /checkout/settle (or /checkout/:id/settle) activates the subscription. This mirrors Stripe: completing checkout redirects back before the checkout.session.completed webhook lands, so activation is deferred to settle. A card-required trial activates as trialing. - customers.get_or_create now returns SDK-shaped subscriptions and per-feature balances derived from the active plan. Validated against the real autumn-js SDK in a new test.
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Extends the Autumn emulator beyond customers + usage so it can drive a real billing UI (plans page, trial checkout). Motivated by reproducing an executor bug where the billing page stayed stale after completing a Stripe free-trial checkout.
What's new
plans.list, with per-customercustomer_eligibility(status,attach_action,trialing,trial_available) computed from the customer's subscriptions. Seed via{ "plans": [...] }.billing.attachandbilling.open_customer_portal. A paid plan, or a card-requiredfree_trial, routes attach through a hosted checkout page (returnspayment_url).renderCheckoutPage):GET /checkout/:idrenders the page,POST /checkout/:id/completeredirects tosuccess_urlwithout activating, and/checkout/settle(or/checkout/:id/settle) activates the subscription. This mirrors Stripe: the browser is redirected back beforecheckout.session.completedreaches Autumn, so activation is deferred to settle. A card-required trial activates astrialing.customers.get_or_createnow returns SDK-shapedsubscriptionsand per-featurebalancesderived from the active plan.Why deferred activation matters
Completing checkout intentionally does not activate the plan until
settleis called. That is what lets a consumer reproduce the real "page is stale until reload" race, where the redirect back lands before the webhook.Validation
New
autumn-trial.test.tsdrives attach → hosted checkout → complete → settle through the realautumn-jsSDK (zod-validated responses) and asserts eligibility transitions (upgrade+ trial available, tonone+ active + trialing after settle). Existing tests still pass; typecheck and lint clean. Response shapes verified against autumn-js 1.2.8 (executor) and 1.2.28.Docs: updated
skills/autumn/SKILL.md(seed shape + checkout flow). README/apps/web only list autumn generically, no per-feature section to touch. Consumed by executor UsefulSoftwareCo/executor#1215; needs a release for executor to pick it up.