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learnharness/components/artifacts/steer-card.tsx
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"use client";
import type { SubagentArtifactData, TeacherUIMessage } from "@/src/core";
import { DemoOutputCard } from "@/components/artifacts/demo-card";
import { ResearchBriefCard } from "@/components/artifacts/job-card";
import { VisualOutputCard } from "@/components/artifacts/visual-card";
/**
* The sub-agent result delivery card (contracts.ts "THE ASYNC PROTOCOL" §4).
*
* When a background job completes, the wake pipeline injects a STEER message
* into the transcript: a user-role UIMessage whose data part
* ("data-subagent-artifact") carries the result. It must NEVER render as a
* learner bubble: the model-facing text part is protocol glue, and the
* artifact itself renders here, by kind, reusing the same artifact cards
* the result always used.
*/
export function SubagentSteerCard({ message }: { message: TeacherUIMessage }) {
const artifactPart = message.parts.find((p) => p.type === "data-subagent-artifact");
const data = artifactPart?.data as SubagentArtifactData | undefined;
if (!data) {
return (
<div className="rounded-xl border bg-card p-4 text-sm text-muted-foreground">
A sub-agent finished, but its result could not be displayed.
</div>
);
}
switch (data.kind) {
case "research":
return <ResearchBriefCard output={data.result} />;
case "demo":
return <DemoOutputCard output={data.result} />;
case "visual":
return <VisualOutputCard output={data.result} />;
}
}