[WIP] Native A2UI Support#866
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Bundle ReportChanges will increase total bundle size by 941.65kB (16.74%) ⬆️
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #866 +/- ##
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What and Why
With the emergence of A2UI and other agent driven standards; Player, in its mission to serve the broader SDUI space, should expand support for more formats beyond its own in order to broaden the scopes of what Player solves for. Furthermore this lets capabilities be built against Player itself, regardless of input format, allowing for the decoupling of implementation from the server driving it.
Core
Player's existing ingestion expects an authored
Flow { id, views, schema, data, navigation }representing a nested asset tree with a state machine. The A2UI v0.9 protocol is shaped differently: a flat adjacency list of components keyed byid, with oneid: "root", JSON Pointer (/user/name) bindings, and polymorphicDynamic*fields (literal | {path} | {call, args}). It has no navigation and no data schema. To let agent-emitted A2UI snapshots run on Player without any platform changes, core/player/src/a2ui/ ships a content adapter wired into Player.start(payload, { format: "a2ui" }). The adapter walks fromroot, inlines child references into Player's nested{asset: ...}shape, translates{path}→"{{x.y}}"template strings on display props (and bare bindings on input props likeTextField.valueso transforms can write back), turnsformatStringinto Player's{{...}}interpolation and other function calls into@[fn({{...}})]@expressions, lifts componentchecksinto a synthesized Player schema with the standardrequired/regex/email/length/numericvalidators, and synthesizes a single-VIEW navigation with oneEND_<event>state peraction: {event: {name}}so agent dispatch becomes a Player transition. The synthesized Flow then flows through Player's existing parser/resolver/data/validation pipeline unchanged. Benchmarks (vitestbenchat adapter.bench.ts) cover tiny/flat/deep/mixed/bindings-heavy/templates-heavy snapshots.A2UI plugin
plugins/a2ui/ ships the platform side.
core/providesA2UIPluginwhich composes A2UITransformPlugin (per-component asset transforms wiringcurrentValue/set()/format()/validationonto input components — TextField, CheckBox, Slider, DateTimeInput, ChoicePicker, Button) and A2UIExpressionsPlugin which registers the standard A2UI catalog functions (format.tsformatString/formatNumber/formatCurrency/formatDate/pluralize, validation.tsrequired/regex/length/numeric/email, logic.tsand/or/not, action.tsopenUrl) so adapter-emitted@[fn(...)]@expressions evaluate via Intl/standard handlers.react/provides the rendering layer (Text,Row,Column,List,Card,Modal,Tabs,Button,TextField,CheckBox,Slider,DateTimeInput,ChoicePicker,Image,Icon,Divider) — assets just read their already-resolved props since Player Core handles all binding/expression resolution upstream. Themocks/package contains end-to-end snapshots (text/list/template/expressions-showcase/text-field-validation) used by both storybook and integration tests.To Do
To Align On
Overall Approach
Change Type (required)
Indicate the type of change your pull request is:
patchminormajorN/ADoes your PR have any documentation updates?
Release Notes
TBD
📦 Published PR as canary version:
0.16.0--canary.866.36538Try this version out locally by upgrading relevant packages to 0.16.0--canary.866.36538