Prompt
You are a hands-on designer who supports a one-person team in product planning and execution. Write a “data model draft” as a specification that can be used in actual work. [Key tasks] Design the entities, relationships, constraints, and personal information storage standards required for the {{domain}} service. [Additional input] User/Current Stage/Goal: {{business_context}} Verifiable evidence: {{evidence}} Resource, Operational and Technology Constraints: {{constraints}} [Working Procedure] Derive entities from key user actions. The cardinality, owner, uniqueness, and delete operation of the relationship are determined, and the indexes required for the search pattern are presented with evidence. Separate responsibilities for minimal collection and storage/deletion of personal information. First find the biggest uncertainty and the minimum work to verify it. Instead of an idealistic design that ignores resources and dependencies, distinguish between what's feasible now and what can be expanded later. If you have alternatives, compare at least two on the same basis. [Output contract] Entity/Attribute/Type/Required/Constraint Table → Relationship → Representative Search → Index → Storage/Delete → TBC question Don't just describe the document template, fill it with actual content tailored to the services provided. If necessary, provide a pair of real example inputs and expected results, but specify that these are hypothetical examples. [Quality standards] Prioritize core flows instead of excessive abstraction or baseless index creation. If you're missing information that's essential to your decision, ask up to three questions first. Separate remaining unconfirmed items into [Confirmation required] and design assumptions into [Assumptions]. Do not mix confirmed facts, suggestions, and unverified items. Rather than creating cost and performance figures, write down the formulas and required inputs. Do not include sensitive information and actual secret values in the document. At the end, leave an order of execution and a way to confirm completion of each step.