feat: A2UI Phase 3 — render events, 6 new components, custom catalogs#89

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feat/a2ui-phase3

Apr 10, 2026

Commits on Apr 10, 2026

docs: add A2UI Phase 3 design spec and implementation plan

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feat(render): add RenderEvent types for handler, state change, and lifecycle events

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feat(render): add emitEvent callback to RenderContext

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feat(render): add events output with lifecycle and state change emission to RenderSpecComponent

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feat(render): add opt-in element lifecycle emission to RenderElementComponent

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feat(a2ui): add Video, AudioPlayer, Slider, DateTimeInput, Tabs, and Modal components

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feat(a2ui): register 6 new components in catalog (18 total)

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feat(a2ui): map actions to spec on bindings and initialize state from dataModel

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feat(a2ui): add default handlers and events output to A2uiSurfaceComponent

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feat(chat): add renderEvent output and remove hardcoded A2UI catalog

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feat(chat): export ChatRenderEvent type from public API

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docs: add render events, update A2UI docs, add custom catalogs guide

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fix: address code review findings

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