# Concept — Frontend Responsibility Model

Status: hypothesis

## Proposition

Frontend architectures can be usefully analyzed through nine responsibilities:

1. Address
2. Authority
3. Projection
4. Affordance
5. Mutation
6. Synchronization
7. Reconciliation
8. Composition
9. Execution

These are dimensions of responsibility, not mandatory modules.

## Value

The model appears broad enough to describe:

- document-oriented web applications,
- SPAs,
- server-rendered systems,
- islands,
- server components,
- microfrontends,
- offline-first applications,
- local-first applications,
- collaborative replicated applications.

## Research burden

The model must be challenged for:

- redundancy,
- missing responsibilities,
- ambiguous boundaries,
- inability to distinguish materially different architectures.