Adds assistants.

app/src/services/api/client.ts

@@ -76,6 +76,17 @@ class ApiClient {
   streamUrl(path: string): string {
     return `${this.baseUrl}${path}`
   }
+
+  // Build a ws(s):// URL for a WebSocket endpoint. Handles both the cross-origin
+  // base (https://castle-api.<domain>) and the same-origin "/api" base.
+  wsUrl(path: string): string {
+    const absolute = this.baseUrl.startsWith("http")
+      ? `${this.baseUrl}${path}`
+      : `${window.location.origin}${this.baseUrl}${path}`
+    const url = new URL(absolute)
+    url.protocol = url.protocol === "https:" ? "wss:" : "ws:"
+    return url.toString()
+  }
 }
 
 export const apiClient = new ApiClient()

app/src/services/api/hooks.ts

@@ -17,6 +17,9 @@ import type {
   MeshStatus,
   NodeSummary,
   NodeDetail,
+  AgentInfo,
+  AgentSessionInfo,
+  AgentHistoryEntry,
 } from "@/types"
 
 // Compat hook for the /deployments/{name} unified detail endpoint
@@ -208,6 +211,39 @@ export function useMeshStatus() {
   })
 }
 
+export function useAgents() {
+  return useQuery({
+    queryKey: ["agents"],
+    queryFn: () => apiClient.get<AgentInfo[]>("/agents"),
+    staleTime: Infinity,
+  })
+}
+
+export function useAgentSessions() {
+  return useQuery({
+    queryKey: ["agent-sessions"],
+    queryFn: () => apiClient.get<AgentSessionInfo[]>("/agents/sessions"),
+    refetchInterval: 5_000,
+  })
+}
+
+export function useAgentHistory(enabled: boolean) {
+  return useQuery({
+    queryKey: ["agent-history"],
+    queryFn: () => apiClient.get<AgentHistoryEntry[]>("/agents/history"),
+    enabled,
+    staleTime: 10_000,
+  })
+}
+
+export function useDeleteAgentSession() {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: (id: string) => apiClient.delete(`/agents/sessions/${id}`),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ["agent-sessions"] }),
+  })
+}
+
 export function useEventStream() {
   const qc = useQueryClient()