diff --git a/apps/web/src/hooks/use-service-resources.ts b/apps/web/src/hooks/use-service-resources.ts
index 06c9a5f7..5cc06ba5 100644
--- a/apps/web/src/hooks/use-service-resources.ts
+++ b/apps/web/src/hooks/use-service-resources.ts
@@ -1,124 +1,25 @@
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 
 import { api } from "@/lib/api";
+import type { ServiceResourcesResponse } from "../../../server/src/observability/service-resources";
+import type { SubsystemHealthState } from "../../../server/src/observability/subsystem-tracker";
 
-export type ResourceHealthState =
-  | "healthy"
-  | "degraded"
-  | "unavailable"
-  | "running"
-  | "idle"
-  | "disabled"
-  | "unknown";
-
-export type ResourceSample = {
-  at: number;
-  serverCpuPercent: number;
-  serverRssBytes: number;
-  serverHeapBytes: number;
-  agentCpuPercent: number | null;
-  agentRssBytes: number | null;
-  hostLoad1: number;
-  subsystems: Record<string, SubsystemResourceSample>;
-};
-
-export type SubsystemResourceSample = {
-  p95DurationMs: number | null;
-  failures: number;
-  metadata: Record<string, number>;
-};
+export type {
+  ResourceSample,
+  ServiceResourcesResponse,
+  SubsystemResourceSample,
+} from "../../../server/src/observability/service-resources";
+export type { SubsystemSnapshot } from "../../../server/src/observability/subsystem-tracker";
 
-export type SubsystemSnapshot = {
-  id: string;
-  label: string;
-  description: string;
-  state: ResourceHealthState;
-  statusReason: "failure" | "stale" | "stuck" | null;
-  expectedCadenceMs: number | null;
-  lastStartedAt: number | null;
-  lastCompletedAt: number | null;
-  lastSucceededAt: number | null;
-  lastFailedAt: number | null;
-  lastDurationMs: number | null;
-  p95DurationMs: number | null;
-  inFlight: number;
-  runs: number;
-  failures: number;
-  lastError: string | null;
-  metadata: Record<string, number>;
-};
-
-export type ServiceResourcesResponse = {
-  collectionEnabled: boolean;
-  generatedAt: number;
-  processStartedAt: number;
-  availableHistoryMs: number;
-  sampleIntervalMs: number;
-  overall: {
-    state: "healthy" | "degraded" | "unavailable" | "unknown";
-    reasons: Array<{ code: string; message: string }>;
-  };
-  capabilities: {
-    processTreeMetrics: "available" | "unsupported" | "error";
-    eventLoopMetrics: "available";
-  };
-  current: {
-    server: {
-      cpuPercent: number;
-      rssBytes: number;
-      heapUsedBytes: number;
-      heapTotalBytes: number;
-      externalBytes: number;
-      uptimeSeconds: number;
-    };
-    host: {
-      load1: number;
-      load5: number;
-      load15: number;
-      cpuCount: number;
-      totalMemoryBytes: number;
-      freeMemoryBytes: number;
-    };
-    agents: {
-      supported: boolean;
-      cpuPercent: number | null;
-      rssBytes: number | null;
-      processCount: number | null;
-      sampledAt: number | null;
-      error: string | null;
-    };
-    database: {
-      state: "healthy" | "unavailable" | "unknown";
-      latencyMs: number | null;
-      sampledAt: number | null;
-      pool: { total: number; idle: number; waiting: number; max: number };
-    };
-    eventLoop: { p95DelayMs: number };
-    http: {
-      requestsPerMinute: number;
-      inFlight: number;
-      errorRatePercent: number;
-      p95DurationMs: number | null;
-    };
-    workloads: {
-      runningAgents: number;
-      sseClients: number;
-      streams: number;
-      streamViewers: number;
-      terminalObservers: number;
-      terminalViewers: number;
-      scheduledJobs: number;
-      jobMonitors: number;
-      gitRefreshesInFlight: number;
-      uiEventsPublished: number;
-      uiWriteFailures: number;
-      terminalPolls: number;
-      terminalPollFailures: number;
-    };
-  };
-  subsystems: SubsystemSnapshot[];
-  series: ResourceSample[];
-};
+/**
+ * Every state the resource dashboard renders a badge for. `stateLabel` and
+ * `stateBadgeVariant` are called with both `subsystem.state` and
+ * `overall.state`, so this tracks both server unions rather than restating
+ * where they differ.
+ */
+export type ResourceHealthState =
+  | SubsystemHealthState
+  | ServiceResourcesResponse["overall"]["state"];
 
 export type ResourceWindow = "15m" | "1h";