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pantheon-ai/software-design-principles

Apply software design principles across architecture and implementation using deterministic decision workflows, SOLID checks, structural patterns, and anti-pattern detection; use when reviewing designs, refactoring modules, or resolving maintainability and coupling risks.

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comp-screaming-architecture.mdreferences/

title:
Structure Should Scream the Domain Not the Framework
impact:
HIGH
impactDescription:
enables understanding at a glance, reveals intent
tags:
comp, screaming-architecture, structure, domain

Structure Should Scream the Domain Not the Framework

The folder structure should communicate what the system does, not what framework it uses. Looking at the top-level directories should reveal the business domain.

Incorrect (framework-oriented structure):

src/
├── controllers/
│   ├── UserController.ts
│   ├── OrderController.ts
│   └── ProductController.ts
├── services/
│   ├── UserService.ts
│   ├── OrderService.ts
│   └── ProductService.ts
├── repositories/
│   ├── UserRepository.ts
│   ├── OrderRepository.ts
│   └── ProductRepository.ts
├── models/
│   ├── User.ts
│   ├── Order.ts
│   └── Product.ts
└── utils/
    └── helpers.ts

# This screams "MVC framework" not "e-commerce system"

Correct (domain-oriented structure):

src/
├── ordering/
│   ├── domain/
│   │   ├── Order.ts
│   │   ├── OrderLine.ts
│   │   └── OrderStatus.ts
│   ├── application/
│   │   ├── PlaceOrderUseCase.ts
│   │   ├── CancelOrderUseCase.ts
│   │   └── ports/
│   │       ├── OrderRepository.ts
│   │       └── PaymentGateway.ts
│   └── infrastructure/
│       ├── PostgresOrderRepository.ts
│       └── StripePaymentGateway.ts
├── inventory/
│   ├── domain/
│   ├── application/
│   └── infrastructure/
├── customers/
│   ├── domain/
│   ├── application/
│   └── infrastructure/
└── shared/
    └── kernel/
        ├── Money.ts
        └── EntityId.ts

# This screams "e-commerce with ordering, inventory, customers"

Benefits:

  • New developers understand the domain immediately
  • Related code lives together, enabling focused changes
  • Frameworks become implementation details, not organizing principles

Reference: Screaming Architecture

Install with Tessl CLI

npx tessl i pantheon-ai/software-design-principles@0.1.4

references

adapt-anti-corruption-layer.md

adapt-controller-thin.md

adapt-gateway-abstraction.md

adapt-mapper-translation.md

adapt-presenter-formats.md

anti-patterns-and-frameworks.md

bound-boundary-cost-awareness.md

bound-defer-decisions.md

bound-humble-object.md

bound-main-component.md

bound-partial-boundaries.md

bound-service-internal-architecture.md

comp-common-closure.md

comp-common-reuse.md

comp-reuse-release-equivalence.md

comp-screaming-architecture.md

comp-stable-dependencies.md

dep-acyclic-dependencies.md

dep-data-crossing-boundaries.md

dep-interface-ownership.md

dep-inward-only.md

dep-no-framework-imports.md

dep-stable-abstractions.md

detailed-examples.md

entity-encapsulate-invariants.md

entity-no-persistence-awareness.md

entity-pure-business-rules.md

entity-rich-not-anemic.md

entity-value-objects.md

frame-di-container-edge.md

frame-domain-purity.md

frame-logging-abstraction.md

frame-orm-in-infrastructure.md

frame-web-in-infrastructure.md

test-boundary-verification.md

test-layer-isolation.md

test-testable-design.md

test-tests-are-architecture.md

usecase-explicit-dependencies.md

usecase-input-output-ports.md

usecase-no-presentation-logic.md

usecase-orchestrates-not-implements.md

usecase-single-responsibility.md

usecase-transaction-boundary.md

SKILL-FULL.md

SKILL.md

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