business-rules

Domain-specific constraints, validation rules and business invariants

Metadados

• category: business-rules
• priority: medium

Aplica-se a

• pm-analyst
• architect
• backend

Tags

• domain
• business
• validation

Conteudo do artefato

Business Rules

Purpose

Define domain-specific constraints, validation rules and business invariants that agents must respect when designing or implementing features.

Rules

• Document business rules explicitly before implementing.
• Validate business constraints in the domain layer, not in controllers.
• Business rules must be testable and independently verifiable.
• Do not invent business rules -- derive them from PRDs, stories or stakeholder input.
• Escalate ambiguity in business rules to the product owner.

Examples

• "A user can only have one active subscription at a time."
• "Order total must be recalculated when line items change."
• "Discount codes expire 30 days after issuance."

Enforcement

• Domain layer validation enforces invariants.
• Business rule tests in the test suite.
• PRD and story acceptance criteria must reference applicable business rules.

Arquivo

• packs/engineering-base/rules/business-rules.md

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