chore: switch mergemaster to opus and add cargo fmt guidance

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/api/gateway.ts

@@ -8,6 +8,18 @@ export interface JoinedAgent {
 	label: string;
 	address: string;
 	registered_at: number;
+	/// Project this agent is assigned to, if any.
+	assigned_project?: string;
+}
+
+export interface GatewayProject {
+	name: string;
+	url: string;
+}
+
+export interface GatewayInfo {
+	active: string;
+	projects: GatewayProject[];
 }
 
 export interface GenerateTokenResponse {
@@ -61,4 +73,17 @@ export const gatewayApi = {
 			method: "DELETE",
 		});
 	},
+
+	/// Assign an agent to a project, or unassign it by passing null.
+	assignAgent(id: string, project: string | null): Promise<JoinedAgent> {
+		return gatewayRequest<JoinedAgent>(`/gateway/agents/${id}/assign`, {
+			method: "POST",
+			body: JSON.stringify({ project }),
+		});
+	},
+
+	/// Get the list of registered projects from the gateway.
+	getGatewayInfo(): Promise<GatewayInfo> {
+		return gatewayRequest<GatewayInfo>("/api/gateway");
+	},
 };