a2ui-developmentlisted

Google's A2UI (Agent-to-UI) protocol — declarative agent-generated UI, message envelopes, component catalogs, and data binding. Use when an agent needs to render rich interactive UI (not just text) declaratively across web/mobile/desktop, when parsing or emitting createSurface/updateComponents/updateDataModel/deleteSurface messages, when building a native A2UI renderer or emitter from the wire spec, or when validating a payload against the official A2UI schema. Do NOT use for agent event/streaming lifecycle concerns (run/step/tool-call/reasoning events) — this skill covers only the UI-rendering payload format, not the transport or event stream carrying it.
RahulDas-dev/skill_builder · ★ 0 · Web & Frontend · score 61

Install: claude install-skill RahulDas-dev/skill_builder

# A2UI Protocol Development Guide Reference for Google's A2UI (Agent-to-UI) protocol — a declarative wire format that lets an agent describe rich, interactive UI as structured JSON instead of executable code or raw HTML. ## When to Use This Skill * Implementing an agent backend that needs to render forms, cards, lists, or other rich widgets — not just chat text * Building a native A2UI renderer (web, mobile, or desktop) that consumes `createSurface`/`updateComponents`/`updateDataModel` messages * Parsing or emitting A2UI messages by hand, without adopting a full ready-made renderer SDK * Validating a hand-built A2UI payload against the official schema * Debugging surface/component/data-model synchronization issues ## Dependencies A2UI has many ready-made renderer/solution packages across languages. **This skill deliberately does not teach any of them as "the way" to implement A2UI** — the goal is understanding the wire format well enough to emit/consume it natively. The packages below are useful only as a schema/type *reference to validate against*: | Package | Ecosystem | Role | Use it for | | --- | --- | --- | --- | | `a2ui-core` (PyPI) | Python | Deps: `pydantic`, `jsonschema`, `referencing` only — no agent-framework lock-in | Validating a hand-built payload dict against the official JSON Schema | | `@a2ui/web_core` (npm) | JS/TS | Official core lib; deps `zod`, `zod-to-json-schema` | Runtime validation of messages you constructed yourself | | `@a2ui-sdk/types` (npm)