Preserve initial frontend pattern language research scaffold

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a0cffe-206f-7323-89d3-b20ca4cf4bf9

research/concepts/ResponsibilityModel.md

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+# 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.