Reference overview

• Modules — every module mounted in app/src/modules.ts, one line of purpose each, sourced from each module’s own published-interface header comment.
• Tenant-facing API — the routes reachable with an fdk_-prefixed tenant credential: self-serve store management, the merchant API, checkout, and the public storefront catalog. This is the seed of the future headless API reference — described from the real route handlers, not a hand-written OpenAPI spec.

Modules in depth

Per-module reference for the capabilities added in the recent waves — each grounded in the module’s own src/index.ts header, its routes, its module.yaml events, and the storefront manifest gates that expose it.

• Subscriptions — recurring-billing engine: schedule, exactly-once renewal sweep, dunning off a vaulted MIT credential.
• Fraud — velocity log, operator blocklist, and the pure AVS/CVV decisioning checkout runs before money moves.
• Marketing — drip/campaign runner, audience enrollment, abandoned-cart detection, and bounce ingestion.
• Media — the write side of the media pipeline: presigned upload -> pending asset -> finalize-to-ready.
• Gift cards — purchasable/redeemable bearer codes with a liability outbox, mirroring the cash module.
• Collections & faceted search — the commerce catalog discovery surfaces (facets + merchandised collections).
• Fulfillment depth — POs/receiving, physical locations, fulfillment nodes/modes, dropship vendor costs, COGS.
• Seam closures — the tax:collected liability leg, order ship_to, subscribe-and-save at checkout, wishlist.