Files
copilotkit__copilotkit/examples/integrations/langgraph-fastapi/docker-route-override.ts
Ran Shem Tov f13f8865a8 feat(sdk-js/langgraph): zodState helper for agent state schemas
Add a zodState() helper that attaches a lazy `~standard.jsonSchema.input`
to a zod schema so LangGraph's StateSchema.getJsonSchema() emits the
field into the graph's output_schema. Without it, zod v4 fields carry
`~standard.validate` + `vendor` only, `isStandardJSONSchema` returns
false, and the field is silently dropped from output_schema — which in
turn causes the AG-UI LangGraphAgent proxy to filter the value out of
STATE_SNAPSHOT events on the wire, so the frontend never sees it even
though the underlying thread state has the data.

Apply zodState to the middleware's own `copilotkit` state field so it
surfaces in output_schema and export it for demos to use on custom
state fields (todos, documents, etc.).

Uses `z.toJSONSchema` when available (zod v4 subpath) and falls back to
an empty object, which is sufficient to make langgraph-api include the
key in output_schema.
2026-05-01 12:31:04 +02:00

32 lines
911 B
TypeScript

/**
* Docker-specific route override.
* In Docker, the agent is served via AG-UI (not LangGraph Platform)
* because langgraph-cli dev requires Docker-in-Docker.
* The original route.ts (using LangGraphAgent) is preserved unchanged.
*/
import {
CopilotRuntime,
ExperimentalEmptyAdapter,
copilotRuntimeNextJSAppRouterEndpoint,
} from "@copilotkit/runtime";
import { HttpAgent } from "@ag-ui/client";
import { NextRequest } from "next/server";
const agentUrl = process.env.AGENT_URL || "http://localhost:8123";
const defaultAgent = new HttpAgent({
url: `${agentUrl}/`,
});
export const POST = async (req: NextRequest) => {
const { handleRequest } = copilotRuntimeNextJSAppRouterEndpoint({
endpoint: "/api/copilotkit",
serviceAdapter: new ExperimentalEmptyAdapter(),
runtime: new CopilotRuntime({
agents: { default: defaultAgent },
}),
});
return handleRequest(req);
};