Preserve initial frontend pattern language research scaffold

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

research/catalog/SourceCatalog.md

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+# Source Catalog
+
+Initial source families to populate.
+
+| Family | Representative sources | Research purpose |
+|---|---|---|
+| Pattern languages | Christopher Alexander, Hillside/PLoP literature | Pattern form, relations, generative sequences |
+| GUI architecture | Martin Fowler, MVC/MVP/Presentation Model | Presentation/domain/state separation |
+| Unidirectional state | Flux, Redux, Elm | State transition and dependency direction |
+| Hypermedia | REST, HTML forms, HTMX | Navigation, mutation, server projection |
+| Rendering | web.dev, framework docs, Patterns.dev | CSR/SSR/SSG/hydration/islands/streaming |
+| Local-first | Ink & Switch and related work | Local authority, sync, conflict handling |
+| Distributed state | CRDT/event sourcing/sync literature | Reconciliation and replication |
+| Modularity | Feature-Sliced Design | Feature boundaries and dependency rules |
+| Organizational architecture | Microfrontend literature | Independent ownership/deployment |
+| Quality | WCAG, progressive enhancement, web performance | Cross-cutting architectural forces |
+
+## Catalog policy
+
+Each source should eventually capture:
+
+- source identity,
+- date/version,
+- scope,
+- vocabulary used,
+- candidate patterns,
+- dominant forces,
+- assumptions,
+- contradictions,
+- known implementations,
+- evidence quality.