diff --git a/cmd/cognitive-worker/main.go b/cmd/cognitive-worker/main.go
index 9b78b2d..d70ff5c 100644
--- a/cmd/cognitive-worker/main.go
+++ b/cmd/cognitive-worker/main.go
@@ -86,18 +86,20 @@ func main() {
 	mux.Handle("/healthz", health.Handler{Runtime: "cognitive-worker", SemanticGeneration: 1, ArchitectureGeneration: 1})
 	readinessClient := &http.Client{Timeout: 2 * time.Second}
 	lifeboatURL := strings.TrimSuffix(strings.TrimRight(envOr("LOCAL_LIFEBOAT_PROVIDER_URL", "http://cognitive-lifeboat:8086/v1"), "/"), "/v1") + "/health"
-	mux.Handle("/readyz", health.ReadinessHandler{Runtime: "cognitive-worker", Probes: []health.Probe{
-		health.HTTPProbe(readinessClient, strings.TrimRight(envOr("CORE_RUNTIME_URL", "http://core-runtime:8080"), "/")+"/healthz"),
-		health.OptionalHTTPProbe(readinessClient, strings.TrimRight(envOr("LOCAL_CPU_PROVIDER_URL", "http://docker.cin.su:18082/v1"), "/")+"/models"),
-		health.HTTPProbe(readinessClient, lifeboatURL),
-		health.OptionalHTTPProbe(readinessClient, strings.TrimRight(envOr("LOCAL_GPU_PROVIDER_URL", "http://192.168.220.91:11434"), "/")+"/api/tags"),
-	}})
 	fleetClient := &http.Client{Timeout: 2 * time.Second}
 	preferredFleet := capability.FleetTier(envOr("COGNITIVE_PREFERRED_FLEET_TIER", string(capability.FleetTierHeavy)))
 	cpuFleetHeaders := map[string]string{}
 	if cpuAPIKey != "" {
 		cpuFleetHeaders["Authorization"] = "Bearer " + cpuAPIKey
 	}
+	cpuHealthProbe := health.OptionalHTTPProbeWithHeaders(readinessClient, strings.TrimRight(envOr("LOCAL_CPU_PROVIDER_URL", "http://docker.cin.su:18082/v1"), "/")+"/models", cpuFleetHeaders)
+	readinessProbes := []health.Probe{
+		health.HTTPProbe(readinessClient, strings.TrimRight(envOr("CORE_RUNTIME_URL", "http://core-runtime:8080"), "/")+"/healthz"),
+		cpuHealthProbe,
+		health.HTTPProbe(readinessClient, lifeboatURL),
+		health.OptionalHTTPProbe(readinessClient, strings.TrimRight(envOr("LOCAL_GPU_PROVIDER_URL", "http://192.168.220.91:11434"), "/")+"/api/tags"),
+	}
+	mux.Handle("/readyz", health.ReadinessHandler{Runtime: "cognitive-worker", Probes: readinessProbes})
 	mux.Handle("/v1/fleet/readiness", fleetReadinessHandler(fleetClient, preferredFleet, []fleetEndpoint{
 		{ProviderID: "local-cpu-primary", ModelID: "local-cpu-model", Tier: capability.FleetTierFast, URL: strings.TrimRight(envOr("LOCAL_CPU_PROVIDER_URL", "http://docker.cin.su:18082/v1"), "/") + "/models", Headers: cpuFleetHeaders},
 		{ProviderID: "local-medium-unconfigured", ModelID: "medium-unconfigured", Tier: capability.FleetTierMedium},
diff --git a/dev/ACTIVE_TASK.json b/dev/ACTIVE_TASK.json
index f54a423..b930a3c 100644
--- a/dev/ACTIVE_TASK.json
+++ b/dev/ACTIVE_TASK.json
@@ -1,5 +1,5 @@
 {
-  "task_file": "dev/tasks/DEV-000164-authorized-fleet-readiness.json",
-  "task_id": "DEV-000164",
+  "task_file": "dev/tasks/DEV-000165-authorized-cpu-health-probe.json",
+  "task_id": "DEV-000165",
   "task_revision": 1
 }
diff --git a/dev/tasks/DEV-000165-authorized-cpu-health-probe.json b/dev/tasks/DEV-000165-authorized-cpu-health-probe.json
new file mode 100644
index 0000000..b1de7f0
--- /dev/null
+++ b/dev/tasks/DEV-000165-authorized-cpu-health-probe.json
@@ -0,0 +1,23 @@
+{
+  "task_id": "DEV-000165",
+  "task_revision": 1,
+  "architecture_revision": "ADR-0018",
+  "base_repo_revision": "5d5afc88883c7f79e3b051c790642e41386666ec",
+  "risk_tier": "E",
+  "intent": "Use the existing file-backed CPU provider API key in cognitive-worker readiness probes so /readyz and fleet readiness report consistent provider state.",
+  "requirement_ids": ["WP-601", "Model fleet/failover"],
+  "allowed_change_scope": {"modules": ["cognitive-worker", "platform-health"], "paths": ["runtime/health/server.go", "runtime/health/server_test.go", "cmd/cognitive-worker/main.go", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000165-authorized-cpu-health-probe.json"]},
+  "forbidden_change_scope": {"paths": ["architecture/**", "security/**", "database/**", "deploy/**", "contracts/**", "adapters/**", ".gitea/**"]},
+  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 0, "new_third_party_dependencies": 0, "new_database_owner_roles": 0},
+  "contracts": {"consume": ["existing health Probe contract", "existing provider API key resolver"], "may_change": ["health probe header support"]},
+  "semantic_owner": "cognitive-worker/platform health",
+  "canonical_state": [],
+  "state_transitions": ["authenticated CPU probe -> consistent readiness evidence"],
+  "side_effects_and_privileges": ["resolved key is used only in outbound probe header; never logged or persisted"],
+  "persistence_and_migrations": ["none"],
+  "failure_retry_restart": ["provider timeout or rejected key remains degraded; no fallback behavior changed"],
+  "assumptions": ["the local provider uses Bearer authentication"],
+  "acceptance_scenarios": ["health probe sends configured header", "cognitive /readyz uses authenticated CPU probe", "GPU remains optional", "no key is sent when absent"],
+  "required_tests": ["go test ./...", "go vet ./...", "preflight", "check-diff", "check-architecture", "independent", "git diff --check", "CI", "production /readyz and fleet readiness"],
+  "terminal_gap_states": ["BLOCKED_BY_MISSING_CAPABILITY", "BLOCKED_BY_CONFLICT"]
+}
diff --git a/runtime/health/server.go b/runtime/health/server.go
index c25ceed..1f81555 100644
--- a/runtime/health/server.go
+++ b/runtime/health/server.go
@@ -82,11 +82,18 @@ func (h ReadinessHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 }
 
 func HTTPProbe(client *http.Client, endpoint string) Probe {
+	return HTTPProbeWithHeaders(client, endpoint, nil)
+}
+
+func HTTPProbeWithHeaders(client *http.Client, endpoint string, headers map[string]string) Probe {
 	return Probe{Name: endpoint, Check: func(ctx context.Context) error {
 		req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
 		if err != nil {
 			return err
 		}
+		for name, value := range headers {
+			req.Header.Set(name, value)
+		}
 		response, err := client.Do(req)
 		if err != nil {
 			return err
@@ -108,6 +115,12 @@ func OptionalHTTPProbe(client *http.Client, endpoint string) Probe {
 	return probe
 }
 
+func OptionalHTTPProbeWithHeaders(client *http.Client, endpoint string, headers map[string]string) Probe {
+	probe := HTTPProbeWithHeaders(client, endpoint, headers)
+	probe.Optional = true
+	return probe
+}
+
 func TCPProbe(name, host, port string) Probe {
 	return Probe{Name: name, Check: func(ctx context.Context) error {
 		connection, err := (&net.Dialer{}).DialContext(ctx, "tcp", net.JoinHostPort(host, port))
diff --git a/runtime/health/server_test.go b/runtime/health/server_test.go
index e82f33a..2d8caaf 100644
--- a/runtime/health/server_test.go
+++ b/runtime/health/server_test.go
@@ -27,6 +27,20 @@ func TestReadinessReturns200WhenAllProbesPass(t *testing.T) {
 	}
 }
 
+func TestHTTPProbeWithHeadersSendsHeaders(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Header.Get("Authorization") != "Bearer health-key" {
+			t.Fatalf("authorization=%q", r.Header.Get("Authorization"))
+		}
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer server.Close()
+	probe := HTTPProbeWithHeaders(server.Client(), server.URL, map[string]string{"Authorization": "Bearer health-key"})
+	if err := probe.Check(context.Background()); err != nil {
+		t.Fatal(err)
+	}
+}
+
 func TestReadinessStaysAvailableWithOptionalDependencyDegraded(t *testing.T) {
 	handler := ReadinessHandler{Runtime: "test", Probes: []Probe{
 		{Name: "lifeboat", Check: func(context.Context) error { return nil }},