huskies: merge 769

frontend/src/api/gateway.ts

@@ -73,6 +73,39 @@ async function gatewayRequest<T>(
 	return res.json() as Promise<T>;
 }
 
+let _mcpRequestId = 1;
+
+/// Call a gateway MCP tool via JSON-RPC and return the result.
+async function gatewayMcpCall<T>(
+	toolName: string,
+	args: Record<string, unknown> = {},
+): Promise<T> {
+	const id = _mcpRequestId++;
+	const body = JSON.stringify({
+		jsonrpc: "2.0",
+		id,
+		method: "tools/call",
+		params: { name: toolName, arguments: args },
+	});
+	const res = await fetch("/mcp", {
+		method: "POST",
+		headers: { "Content-Type": "application/json" },
+		body,
+	});
+	if (!res.ok) {
+		const text = await res.text();
+		throw new Error(text || `MCP request failed (${res.status})`);
+	}
+	const json = (await res.json()) as {
+		result?: Record<string, unknown>;
+		error?: { message: string };
+	};
+	if (json.error) {
+		throw new Error(json.error.message);
+	}
+	return json.result as T;
+}
+
 export const gatewayApi = {
 	/// Returns `{ mode: "gateway" }` if this server is a gateway, otherwise rejects.
 	getServerMode(): Promise<ServerMode> {
@@ -88,7 +121,9 @@ export const gatewayApi = {
 
 	/// List all build agents that have registered with this gateway.
 	listAgents(): Promise<JoinedAgent[]> {
-		return gatewayRequest<JoinedAgent[]>("/gateway/agents");
+		return gatewayMcpCall<{ agents: JoinedAgent[] }>("agents.list").then(
+			(result) => result.agents ?? [],
+		);
 	},
 
 	/// Remove a registered build agent by its ID.