Backend

The backend in the AI-Driven Development Model is Domain-Driven regardless of stack: Entities, Aggregates, and Bounded Contexts come first. Two programming models are supported depending on the target platform — both driven by AI-assisted code generation.

Choosing the programming model

	Domain-Driven CAP	AI-Driven ABAP (RAP)
Platform	SAP BTP, cloud-native	SAP S/4HANA / ABAP Cloud
Language	Node.js + TypeScript	ABAP
Domain model	CDS	CDS (ABAP) + Behavior Definitions
AI-driven dev	Claude Code (direct on TS/CDS)	Claude Code via ARC-1 (MCP → ADT)
Use when	Greenfield, side-by-side extensions, new cloud solutions	Extending the ABAP digital core, tight S/4HANA integration

• Domain-Driven CAP — the default. SAP CAP as the central abstraction for domain model, services, persistence, and authorization.
• AI-Driven ABAP (RAP) — when the ABAP RESTful Application Programming Model is required; ABAP is developed AI-driven through ARC-1, the ABAP Relay Connector MCP server that bridges the AI agent to the ABAP system.

Both expose OData v4 services, so the React frontend consumes them through the same typed data-access layer.