DSL OS
A structured, repeatable methodology for designing, building, and operating digital systems. Language-agnostic. Framework-independent. Production-focused.
The concept
Most development processes focus on code. DSL OS focuses on system architecture.
It defines six universal layers that every production system needs — from contracts and business logic to operations and security. Each layer has explicit responsibilities, artifacts, and validation criteria.
DSL OS works across languages, frameworks, and domains. It is not a library or tool. It is a structured thinking framework for building systems that scale, operate, and evolve.
The six layers
Every layer serves a specific purpose in the system architecture.
Contracts
What the system does
Define system behavior through explicit contracts. API specifications, event schemas, data models, business rules. The interface between your system and the world.
Core
Business logic & rules
Pure business logic independent of frameworks and infrastructure. Use cases, domain entities, business rules. The heart of your system.
Adapters
External integrations
Connect to external systems, databases, APIs, message queues. Implement contracts defined in layer 1. Keep infrastructure concerns isolated.
Quality
Testing & validation
Automated testing at every layer. Unit tests for business logic. Integration tests for adapters. Contract tests for APIs. System tests for workflows.
Operations
Deploy, monitor, scale
Deployment automation, monitoring, logging, alerting, scaling strategies. The operational requirements that keep systems running in production.
Security
Auth, audit, protection
Authentication, authorization, audit logs, data encryption, compliance requirements. Security concerns that span every layer of the system.
Why DSL OS
Repeatable process
Not reinventing architecture on every project. Clear structure, explicit artifacts, validated outcomes.
Production focus
Operations, security, and reliability are not afterthoughts. They are first-class layers in the system.
Technology agnostic
Works with any language, framework, or infrastructure. Focus on architecture, not tools.
Evolution ready
Systems change. DSL OS designs for maintainability, extensibility, and graceful evolution.