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Add A2UI.Server, A2UI.Socket, A2UI.Endpoint, and A2UI.SurfaceProvider behaviour so applications can serve interactive A2UI surfaces over WebSocket from any OTP supervision tree. - SurfaceProvider behaviour: init/1, surface/1, handle_action/2 - WebSock handler bridging frames to provider callbacks - Plug endpoint routing /ws (upgrade), / (debug renderer) - OTP-compatible server wrapper with child_spec - Self-contained debug renderer page (priv/static/index.html) - Integration tests with real WebSocket via :gun - 67 tests (24 new), all passing Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
A2UI.Server— Bandit-based HTTP + WebSocket endpoint, embeddable in any OTP supervision treeA2UI.SurfaceProviderbehaviour — applications implementinit/1,surface/1, andhandle_action/2to define surfaces and handle user actionsA2UI.Socket(WebSock handler) andA2UI.Endpoint(Plug routing) as internal infrastructurepriv/static/index.html) — renders Text, Button, Card, Row, Column, CheckBox, Divider; shows message log; auto-reconnectsdemo_server.exs— runmix run demo_server.exs, openhttp://localhost:4000New dependencies
bandit(~> 1.0) — pure Elixir HTTP serverwebsock_adapter(~> 0.5) — WebSocket upgrade adaptergun(~> 2.1, test-only) — WebSocket client for integration testsTest plan
mix cipasses (format check + compile warnings-as-errors + 67 tests)mix run demo_server.exsstarts server, open http://localhost:4000 in browser🤖 Generated with Claude Code