DSL Sketch: LocalProblem -> SharedVariables -> PlanDelta

- LocalProblem (Object) represents a device/problem instance with attributes like id, name, and data.
- SharedVariables (Morphism-like channel) captures signals shared across locals, with a versioned schema.
- PlanDelta (Delta) captures changes to local plans to reconcile with the global objective.
- Minimal DSL flavor (pseudocode):

```
LocalProblem {
  id: string
  name: string
  data: dict
}

SharedVariables {
  src: string
  dst: string
  version: string
  schema: dict
}

PlanDelta {
  plan_id: string
  delta: dict
  timestamp: int
}
```

- Adapters implement a mapping from a device-specific representation into the canonical LocalProblem/SharedVariables/PlanDelta contracts.
- The registry stores the contract schemas and their versions to enable conformance checks for adapters.