Can a prompt replace Capacities?

Build a note system where pages are typed objects, not freeform documents — Capacities' actual distinguishing idea. Use Next.js/TypeScript with Postgres. Implement a small fixed set of object types to start: Person, Book, Project, Note, each with its own structured property schema — a Person has name, email, and tags; a Book has title, author, rating, and status. Creating a new object requires picking a type first, then filling in that type's specific fields, plus a freeform Markdown body for everything else. Build a browsable, filterable list per type, such as all Books filterable by status, and a simple search across all objects regardless of type. Support linking one object to another, such as a Project linking to several People, with the link shown on both sides. Do not build a user-facing type designer for arbitrary custom types, real-time multi-device sync, or an AI-assisted property extraction feature — those are out of scope; this ships with a fixed, useful set of types rather than a fully general type system. Requires hosting and a database; no external API key needed.