Module domain 

Core domain logic - graph execution, pipelines, orchestration

Hexagonal principle: Domain never imports adapters, only ports (traits). Domain layer - core business logic

Contains pure business logic with no infrastructure dependencies. Domain layer only imports from ports (trait definitions), never from adapters.

Modules

error

Domain error types

executor

Worker pool executor with backpressure Worker pool executor with backpressure

graph

DAG execution engine using petgraph DAG execution engine

idempotency

Idempotency tracking system Idempotency key tracking system

pipeline

Pipeline types with typestate pattern Pipeline types with typestate pattern