♻️ Reproduction Steps

1. npm install @copilotkit/a2ui-renderer@1.79.0 @a2ui/web_core@0.10.4 zod@3.25.76 react@19 typescript@5 @types/react@19
2. Type-check this (strict):

import { createCatalog } from "@copilotkit/a2ui-renderer";
import { CommonSchemas } from "@a2ui/web_core/v0_9";
import { z } from "zod";

const definitions = {
  Dimmer: { props: z.object({ level: CommonSchemas.DynamicNumber, changeLevel: CommonSchemas.Action }) },
};

export const catalog = createCatalog(definitions, {
  Dimmer: ({ props }) => (
    <input
      type="range"
      value={Number(props.level ?? 0)}
      onChange={(e) => {
        props.setLevel(Number(e.target.value)); // writes the bound data-model path
        props.changeLevel();                    // dispatches the action, context resolved
      }}
    />
  ),
});

3. npx tsc --noEmit

✅ Expected Behavior

It type-checks, because that is what the renderer receives at runtime: the GenericBinder passes resolved props. Action props are functions that dispatch the action with its context resolved, a bound DynamicNumber arrives as a number, and every bindable prop gets a set<Prop> setter. The basic catalog's own components rely on this: Slider calls props.setValue(...) and Button passes props.action to onClick.

❌ Actual Behavior

Two errors, and level is typed as the binding rather than the value:

u5.tsx: error TS2339: Property 'setLevel' does not exist on type '{ level: number | { path: string; } | { call: string; ... }; changeLevel: { ...; } | { ...; }; }'.
u5.tsx: error TS2349: This expression is not callable. No constituent of type '{ event: { name: string; context?: ... }; } | { ...; }' is callable.

CatalogRenderers (create-catalog.tsx) types each renderer as ComponentRenderer<z.infer<D[K]["props"]>>, the schema's input shape. The built-in components avoid this because they're typed through createReactComponent, which uses ResolveA2uiProps from @a2ui/web_core.

Fix: ComponentRenderer<ResolveA2uiProps<z.infer<D[K]["props"]>>> (and the same in createA2UICatalog). I checked it by patching the published 1.79.0 create-catalog.d.mts: the example above then type-checks, and props.setLevel("x") is still rejected. I can open a PR.

Screenshots

No response

𝌚 CopilotKit Version

@copilotkit/a2ui-renderer@1.79.0

📄 Logs (Optional)