# Infrastructure (/product/infrastructure)



Infrastructure is what a module depends on and never the reverse. Each page describes one layer as a builder meets it: what it guarantees, what it asks of a module, and where its edges are.

- [Auth](/product/infrastructure/auth) — Three layers: the proxy's redirect, the verified session, and row-level security.

- [Data access](/product/infrastructure/data-access) — Tiers, roles, the two drivers, tokens and keyset pagination.

- [Schema migrations](/product/infrastructure/schema-migrations) — How one schema change reaches every tenant database, and how that is verified.

- [Storage](/product/infrastructure/storage) — Per-tenant object storage, key shape, presigned uploads and public URLs.

- [Configuration](/product/infrastructure/configuration) — Copy, settings, theme, and the browser layer beneath them.

- [Caching](/product/infrastructure/caching) — Cached reads tagged per tenant, invalidated by the mutation that changes them.

- [Hosting and security](/product/infrastructure/hosting) — The three hosting tiers, the database roles, where secrets live, and the control plane.

- [Operations](/product/infrastructure/operations) — Provisioning, fleet jobs, and the operator's tools.