diff --git a/cmd/hwlab-box-simu/main.mjs b/cmd/hwlab-box-simu/main.mjs
index 5920dd0a..05340bf6 100644
--- a/cmd/hwlab-box-simu/main.mjs
+++ b/cmd/hwlab-box-simu/main.mjs
@@ -8,12 +8,22 @@ import {
 import { createHealth, createBoxState, selectInstanceValue } from "../../internal/sim/model.mjs";
 import { createJsonServer, listen, parsePort, readJson } from "../../internal/sim/http.mjs";
 
-const boxId = selectInstanceValue(process.env.HWLAB_BOX_ID, "boxsim_alpha");
+const boxId = selectInstanceValue(process.env.HWLAB_BOX_ID, "boxsim_alpha", {
+  requireIndexForMultiple: true,
+  label: "HWLAB_BOX_ID"
+});
 const gatewaySessionId = selectInstanceValue(
   process.env.HWLAB_GATEWAY_SESSION_ID,
-  "gws_mvp_simu"
+  "gws_mvp_simu",
+  {
+    requireIndexForMultiple: true,
+    label: "HWLAB_GATEWAY_SESSION_ID"
+  }
 );
-const resourceId = selectInstanceValue(process.env.HWLAB_BOX_RESOURCE_ID, "");
+const resourceId = selectInstanceValue(process.env.HWLAB_BOX_RESOURCE_ID, "", {
+  requireIndexForMultiple: true,
+  label: "HWLAB_BOX_RESOURCE_ID"
+});
 const port = parsePort(process.env.PORT, 7201);
 const state = createBoxState({ boxId, gatewaySessionId });
 if (resourceId) {
diff --git a/cmd/hwlab-gateway-simu/main.mjs b/cmd/hwlab-gateway-simu/main.mjs
index 9840adbc..44da4d41 100644
--- a/cmd/hwlab-gateway-simu/main.mjs
+++ b/cmd/hwlab-gateway-simu/main.mjs
@@ -9,7 +9,10 @@ import {
 import { fetchJson, createJsonServer, listen, parsePort, readJson } from "../../internal/sim/http.mjs";
 import { createRpcErrorBody, ERROR_CODES } from "../../internal/protocol/index.mjs";
 
-const gatewayId = selectInstanceValue(process.env.HWLAB_GATEWAY_ID, "gateway-a");
+const gatewayId = selectInstanceValue(process.env.HWLAB_GATEWAY_ID, "gateway-a", {
+  requireIndexForMultiple: true,
+  label: "HWLAB_GATEWAY_ID"
+});
 const port = parsePort(process.env.PORT, 7101);
 const endpoint = `http://127.0.0.1:${port}`;
 const boxUrls = parseBoxUrls(process.env.HWLAB_BOX_URLS);
@@ -117,9 +120,9 @@ function parseList(value) {
 }
 
 function parseBoxes({ resources, ids, urls, instanceScoped = false }) {
-  const explicitResources = instanceScoped ? selectScopedList(resources) : parseList(resources);
-  const explicitIds = instanceScoped ? selectScopedList(ids) : parseList(ids);
-  const explicitUrls = instanceScoped ? selectScopedList(urls.join(",")) : urls;
+  const explicitResources = instanceScoped ? selectScopedList(resources, "HWLAB_BOX_RESOURCES") : parseList(resources);
+  const explicitIds = instanceScoped ? selectScopedList(ids, "HWLAB_BOX_IDS") : parseList(ids);
+  const explicitUrls = instanceScoped ? selectScopedList(urls.join(","), "HWLAB_BOX_URLS") : urls;
   const count = Math.max(explicitResources.length, explicitIds.length, explicitUrls.length, 1);
   const parsed = [];
 
@@ -140,12 +143,15 @@ function parseBoxes({ resources, ids, urls, instanceScoped = false }) {
   return parsed;
 }
 
-function selectScopedList(value) {
+function selectScopedList(value, label = "scoped list") {
   const items = parseList(value);
   if (items.length <= 1) {
     return items;
   }
-  const selected = selectInstanceValue(items.join(","), "");
+  const selected = selectInstanceValue(items.join(","), "", {
+    requireIndexForMultiple: true,
+    label
+  });
   return selected ? [selected] : [];
 }
 
diff --git a/cmd/hwlab-patch-panel/main.mjs b/cmd/hwlab-patch-panel/main.mjs
index c83ef3fc..f62e1e9d 100644
--- a/cmd/hwlab-patch-panel/main.mjs
+++ b/cmd/hwlab-patch-panel/main.mjs
@@ -13,12 +13,13 @@ const topology = createM3Topology();
 const endpointMap = parseEndpointMap(process.env.HWLAB_PATCH_PANEL_ENDPOINT_MAP) ?? {
   res_boxsimu_2: "http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201"
 };
+const manifestWiringConfig = parseWiringConfig(process.env.HWLAB_PATCH_PANEL_WIRING_CONFIG);
 const runtime = wiringConfigPath
   ? await createPatchPanelRuntimeFromFile({ path: wiringConfigPath })
   : createPatchPanelRuntime({
-      wiringConfig: topology.wiringConfig,
+      wiringConfig: manifestWiringConfig ?? topology.wiringConfig,
       endpointMap,
-      configSource: "internal:m3-topology"
+      configSource: manifestWiringConfig ? "env:HWLAB_PATCH_PANEL_WIRING_CONFIG" : "internal:m3-topology"
     });
 
 const routes = new Map();
@@ -51,3 +52,12 @@ function parseEndpointMap(value) {
 
   return JSON.parse(source);
 }
+
+function parseWiringConfig(value) {
+  const source = String(value ?? "").trim();
+  if (!source) {
+    return null;
+  }
+
+  return JSON.parse(source);
+}
diff --git a/deploy/deploy.json b/deploy/deploy.json
index 3c35e001..42b58aec 100644
--- a/deploy/deploy.json
+++ b/deploy/deploy.json
@@ -301,9 +301,17 @@
       "healthPath": "/health/live",
       "profile": "dev",
       "replicas": 1,
+      "m3Route": {
+        "fromResourceId": "res_boxsimu_1",
+        "fromPort": "DO1",
+        "patchPanelServiceId": "hwlab-patch-panel",
+        "toResourceId": "res_boxsimu_2",
+        "toPort": "DI1"
+      },
       "env": {
         "HWLAB_PATCH_PANEL_MODE": "dev-skeleton",
         "HWLAB_PATCH_PANEL_ENDPOINT_MAP": "{\"res_boxsimu_2\":\"http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201\"}",
+        "HWLAB_PATCH_PANEL_WIRING_CONFIG": "{\"wiringConfigId\":\"wir_m3_do1_di1\",\"projectId\":\"prj_m3_hardware_loop\",\"gatewaySessionId\":\"gws_gwsimu_1\",\"name\":\"M3 simulated DO1 to DI1 patch wiring\",\"status\":\"active\",\"connections\":[{\"from\":{\"resourceId\":\"res_boxsimu_1\",\"port\":\"DO1\"},\"to\":{\"resourceId\":\"res_boxsimu_2\",\"port\":\"DI1\"},\"mode\":\"exclusive\"}],\"constraints\":{\"propagation\":\"patch-panel-only\",\"localLoopbackSubstituteAllowed\":false},\"createdAt\":\"2026-05-21T00:00:00.000Z\",\"updatedAt\":\"2026-05-21T00:00:00.000Z\"}",
         "HWLAB_ENVIRONMENT": "dev"
       }
     },
diff --git a/deploy/deploy.schema.json b/deploy/deploy.schema.json
index 96487245..dad77c95 100644
--- a/deploy/deploy.schema.json
+++ b/deploy/deploy.schema.json
@@ -353,6 +353,33 @@
           "type": "string",
           "enum": ["indexed-workloads"]
         },
+        "m3Route": {
+          "type": "object",
+          "required": ["fromResourceId", "fromPort", "patchPanelServiceId", "toResourceId", "toPort"],
+          "properties": {
+            "fromResourceId": {
+              "type": "string",
+              "const": "res_boxsimu_1"
+            },
+            "fromPort": {
+              "type": "string",
+              "const": "DO1"
+            },
+            "patchPanelServiceId": {
+              "type": "string",
+              "const": "hwlab-patch-panel"
+            },
+            "toResourceId": {
+              "type": "string",
+              "const": "res_boxsimu_2"
+            },
+            "toPort": {
+              "type": "string",
+              "const": "DI1"
+            }
+          },
+          "additionalProperties": false
+        },
         "env": {
           "type": "object",
           "additionalProperties": {
diff --git a/deploy/k8s/base/workloads.yaml b/deploy/k8s/base/workloads.yaml
index 0a9f88fa..6022ca45 100644
--- a/deploy/k8s/base/workloads.yaml
+++ b/deploy/k8s/base/workloads.yaml
@@ -543,6 +543,10 @@
                   {
                     "name": "HWLAB_PATCH_PANEL_ENDPOINT_MAP",
                     "value": "{\"res_boxsimu_2\":\"http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201\"}"
+                  },
+                  {
+                    "name": "HWLAB_PATCH_PANEL_WIRING_CONFIG",
+                    "value": "{\"wiringConfigId\":\"wir_m3_do1_di1\",\"projectId\":\"prj_m3_hardware_loop\",\"gatewaySessionId\":\"gws_gwsimu_1\",\"name\":\"M3 simulated DO1 to DI1 patch wiring\",\"status\":\"active\",\"connections\":[{\"from\":{\"resourceId\":\"res_boxsimu_1\",\"port\":\"DO1\"},\"to\":{\"resourceId\":\"res_boxsimu_2\",\"port\":\"DI1\"},\"mode\":\"exclusive\"}],\"constraints\":{\"propagation\":\"patch-panel-only\",\"localLoopbackSubstituteAllowed\":false},\"createdAt\":\"2026-05-21T00:00:00.000Z\",\"updatedAt\":\"2026-05-21T00:00:00.000Z\"}"
                   }
                 ],
                 "readinessProbe": {
diff --git a/internal/patchpanel/runtime.test.mjs b/internal/patchpanel/runtime.test.mjs
index bb6282a3..1082c582 100644
--- a/internal/patchpanel/runtime.test.mjs
+++ b/internal/patchpanel/runtime.test.mjs
@@ -1,6 +1,7 @@
 import assert from "node:assert/strict";
 import test from "node:test";
 
+import { createM3Topology } from "./fixture.mjs";
 import { createWiringConfig } from "./model.mjs";
 import { createPatchPanelRuntime } from "./runtime.mjs";
 
@@ -110,3 +111,55 @@ test("runtime reports missing target endpoint as readable diagnostics", async ()
   assert.equal(result.deliveryCount, 1);
   assert.ok(result.diagnostics.some((diagnostic) => diagnostic.code === "target_endpoint_missing"));
 });
+
+test("runtime applies first-class DEV M3 wiring config for res_boxsimu_1 DO1 to res_boxsimu_2 DI1", async () => {
+  const topology = createM3Topology();
+  const writes = [];
+  const runtime = createPatchPanelRuntime({
+    wiringConfig: topology.wiringConfig,
+    endpointMap: {
+      res_boxsimu_2: "http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201"
+    },
+    configSource: "env:HWLAB_PATCH_PANEL_WIRING_CONFIG",
+    now: () => "2026-05-21T00:00:01.000Z",
+    requestJson: async (url, body) => {
+      writes.push({ url, body });
+      return {
+        status: 200,
+        json: {
+          accepted: true
+        }
+      };
+    }
+  });
+
+  assert.equal(runtime.status().state, "active");
+  assert.equal(runtime.status().metadata.configSource, "env:HWLAB_PATCH_PANEL_WIRING_CONFIG");
+  assert.deepEqual(runtime.status().activeConnections, [
+    {
+      fromResourceId: "res_boxsimu_1",
+      fromPort: "DO1",
+      toResourceId: "res_boxsimu_2",
+      toPort: "DI1"
+    }
+  ]);
+
+  const result = await runtime.routeSignal({
+    fromResourceId: "res_boxsimu_1",
+    fromPort: "DO1",
+    value: true
+  });
+
+  assert.equal(result.accepted, true);
+  assert.equal(result.propagatedBy, "hwlab-patch-panel");
+  assert.equal(result.deliveryCount, 1);
+  assert.equal(writes.length, 1);
+  assert.equal(
+    writes[0].url,
+    "http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201/internal/ports/write"
+  );
+  assert.equal(writes[0].body.port, "DI1");
+  assert.equal(writes[0].body.sourceResourceId, "res_boxsimu_1");
+  assert.equal(writes[0].body.sourcePort, "DO1");
+  assert.equal(writes[0].body.propagatedBy, "hwlab-patch-panel");
+});
diff --git a/internal/sim/model.mjs b/internal/sim/model.mjs
index 53c0e5de..1b070246 100644
--- a/internal/sim/model.mjs
+++ b/internal/sim/model.mjs
@@ -92,7 +92,16 @@ function isoNow() {
   return new Date().toISOString();
 }
 
-export function selectInstanceValue(value, fallback, { index = process.env.HWLAB_INSTANCE_INDEX } = {}) {
+export function selectInstanceValue(
+  value,
+  fallback,
+  {
+    index = process.env.HWLAB_INSTANCE_INDEX,
+    hostname = process.env.HOSTNAME,
+    requireIndexForMultiple = false,
+    label = "instance value"
+  } = {}
+) {
   const items = String(value ?? "")
     .split(",")
     .map((item) => item.trim())
@@ -110,12 +119,17 @@ export function selectInstanceValue(value, fallback, { index = process.env.HWLAB
     return items[parsedIndex];
   }
 
-  const hostname = process.env.HOSTNAME ?? "";
-  const ordinal = Number.parseInt(hostname.match(/-(\d+)$/)?.[1] ?? "", 10);
+  const ordinal = Number.parseInt(String(hostname ?? "").match(/-(\d+)$/)?.[1] ?? "", 10);
   if (Number.isInteger(ordinal) && ordinal >= 0 && ordinal < items.length) {
     return items[ordinal];
   }
 
+  if (requireIndexForMultiple) {
+    throw new Error(
+      `${label} declares ${items.length} indexed values, but neither HWLAB_INSTANCE_INDEX nor a StatefulSet ordinal HOSTNAME selected one`
+    );
+  }
+
   return items[0];
 }
 
diff --git a/internal/sim/model.test.mjs b/internal/sim/model.test.mjs
new file mode 100644
index 00000000..f975a77c
--- /dev/null
+++ b/internal/sim/model.test.mjs
@@ -0,0 +1,53 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import { selectInstanceValue } from "./model.mjs";
+
+test("indexed simulator identity selection uses explicit HWLAB_INSTANCE_INDEX", () => {
+  assert.equal(
+    selectInstanceValue("boxsimu_1,boxsimu_2", "fallback", {
+      index: "1",
+      hostname: "deployment-shaped-pod",
+      requireIndexForMultiple: true,
+      label: "HWLAB_BOX_ID"
+    }),
+    "boxsimu_2"
+  );
+});
+
+test("indexed simulator identity selection uses StatefulSet hostname ordinal", () => {
+  assert.equal(
+    selectInstanceValue("res_boxsimu_1,res_boxsimu_2", "fallback", {
+      index: "",
+      hostname: "hwlab-box-simu-1",
+      requireIndexForMultiple: true,
+      label: "HWLAB_BOX_RESOURCE_ID"
+    }),
+    "res_boxsimu_2"
+  );
+});
+
+test("multi-value simulator identities fail closed without an instance index", () => {
+  assert.throws(
+    () =>
+      selectInstanceValue("gwsimu_1,gwsimu_2", "fallback", {
+        index: "",
+        hostname: "hwlab-gateway-simu-random-suffix",
+        requireIndexForMultiple: true,
+        label: "HWLAB_GATEWAY_ID"
+      }),
+    /HWLAB_GATEWAY_ID declares 2 indexed values/u
+  );
+});
+
+test("single simulator identity value still works without an index", () => {
+  assert.equal(
+    selectInstanceValue("boxsimu_1", "fallback", {
+      index: "",
+      hostname: "deployment-shaped-pod",
+      requireIndexForMultiple: true,
+      label: "HWLAB_BOX_ID"
+    }),
+    "boxsimu_1"
+  );
+});
diff --git a/package.json b/package.json
index 68a9358f..8ce95052 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "validate": "node scripts/validate-contract.mjs && node scripts/deploy-contract-plan.mjs --check && node scripts/deploy-desired-state-plan.mjs --check && node scripts/dev-runtime-migration.mjs --check && node --test scripts/artifact-runtime-readiness-guard.test.mjs",
-    "check": "node --check internal/protocol/index.mjs && node --check internal/agent/index.mjs && node --check internal/agent/runtime.mjs && node --check internal/audit/index.mjs && node --check internal/db/runtime-store.mjs && node --check internal/db/runtime-store.test.mjs && node --check internal/mvp-gate/summary.mjs && node --check internal/cloud/db-contract.mjs && node --check internal/cloud/code-agent-contract.mjs && node --check internal/cloud/json-rpc.mjs && node --check internal/cloud/code-agent-chat.mjs && node --check internal/cloud/server.mjs && node --check internal/sim/model.mjs && node --check internal/sim/http.mjs && node --check internal/sim/l2-runtime.mjs && node --check internal/patchpanel/model.mjs && node --check internal/patchpanel/runtime.mjs && node --check cmd/hwlab-cloud-api/main.mjs && node --check cmd/hwlab-agent-mgr/main.mjs && node --check cmd/hwlab-agent-worker/main.mjs && node --check cmd/hwlab-box-simu/main.mjs && node --check cmd/hwlab-gateway-simu/main.mjs && node --check scripts/cloud-api-runtime-smoke.mjs && node --check scripts/code-agent-chat-smoke.mjs && node --check scripts/dev-edge-health-smoke.mjs && node --check scripts/src/dev-edge-health-smoke-lib.mjs && node --check scripts/validate-contract.mjs && node --check scripts/deploy-desired-state-plan.mjs && node --check scripts/src/deploy-desired-state-plan.mjs && node --check scripts/artifact-runtime-readiness-guard.mjs && node --check scripts/src/artifact-runtime-readiness-guard.mjs && node --check scripts/artifact-runtime-readiness-guard.test.mjs && node --check scripts/report-lifecycle.mjs && node --check scripts/report-lifecycle.test.mjs && node --check scripts/validate-dev-gate-report.mjs && node --check scripts/dev-m3-hardware-loop-smoke.test.mjs && node --check scripts/dev-cloud-workbench-smoke.test.mjs && node --check scripts/validate-dev-m3-cardinality.mjs && node --check scripts/validate-artifact-catalog.mjs && node --check scripts/refresh-artifact-catalog.mjs && node --check scripts/dev-artifact-publish.mjs && node --check scripts/src/dev-artifact-services.mjs && node --check scripts/src/registry-capabilities.mjs && node --check scripts/preflight-dev-base-image.mjs && node --check scripts/src/dev-base-image-preflight.mjs && node --check scripts/dev-evidence-blocker-aggregator.mjs && node --check scripts/src/dev-evidence-blocker-aggregator.mjs && node --check scripts/d601-k3s-readonly-observability.mjs && node --check scripts/src/d601-k3s-readonly-observability.mjs && node --check scripts/dev-runtime-migration.mjs && node --check scripts/src/dev-runtime-migration.mjs && node --check scripts/src/dev-runtime-migration.test.mjs && node --check scripts/l2-runtime-contract-smoke.mjs && node --check scripts/patch-panel-runtime-smoke.mjs && node --check scripts/export-web-gate-summary.mjs && node --check scripts/l6-cli-web-smoke.mjs && node --check tools/hwlab-cli/bin/hwlab-cli.mjs && node --check tools/hwlab-cli/lib/cli.mjs && node --check web/hwlab-cloud-web/app.mjs && node --check web/hwlab-cloud-web/gate-summary.mjs && node --check web/hwlab-cloud-web/scripts/check.mjs && node --check web/hwlab-cloud-web/scripts/build.mjs && node --check web/hwlab-cloud-web/scripts/dist-contract.mjs && node scripts/validate-contract.mjs && node scripts/validate-dev-gate-report.mjs && node scripts/report-lifecycle.test.mjs && node scripts/validate-dev-m3-cardinality.mjs && node scripts/validate-artifact-catalog.mjs && node scripts/deploy-desired-state-plan.mjs --check && node scripts/dev-runtime-migration.mjs --check && node scripts/dev-evidence-blocker-aggregator.mjs --check && node scripts/l2-runtime-contract-smoke.mjs && node scripts/l6-cli-web-smoke.mjs && node web/hwlab-cloud-web/scripts/check.mjs && node scripts/code-agent-chat-smoke.mjs && node --test scripts/artifact-runtime-readiness-guard.test.mjs scripts/dev-m3-hardware-loop-smoke.test.mjs scripts/dev-cloud-workbench-smoke.test.mjs scripts/deploy-desired-state-plan.test.mjs scripts/src/dev-deploy-apply.test.mjs scripts/src/dev-runtime-migration.test.mjs internal/agent/index.test.mjs internal/audit/index.test.mjs internal/db/schema.test.mjs internal/db/runtime-store.test.mjs internal/cloud/json-rpc.test.mjs internal/cloud/server.test.mjs internal/patchpanel/model.test.mjs internal/patchpanel/runtime.test.mjs && node scripts/cloud-api-runtime-smoke.mjs && sh -n scripts/bootstrap-skills.sh scripts/worker-entrypoint.sh",
+    "check": "node --check internal/protocol/index.mjs && node --check internal/agent/index.mjs && node --check internal/agent/runtime.mjs && node --check internal/audit/index.mjs && node --check internal/db/runtime-store.mjs && node --check internal/db/runtime-store.test.mjs && node --check internal/mvp-gate/summary.mjs && node --check internal/cloud/db-contract.mjs && node --check internal/cloud/code-agent-contract.mjs && node --check internal/cloud/json-rpc.mjs && node --check internal/cloud/code-agent-chat.mjs && node --check internal/cloud/server.mjs && node --check internal/sim/model.mjs && node --check internal/sim/model.test.mjs && node --check internal/sim/http.mjs && node --check internal/sim/l2-runtime.mjs && node --check internal/patchpanel/model.mjs && node --check internal/patchpanel/runtime.mjs && node --check cmd/hwlab-cloud-api/main.mjs && node --check cmd/hwlab-agent-mgr/main.mjs && node --check cmd/hwlab-agent-worker/main.mjs && node --check cmd/hwlab-box-simu/main.mjs && node --check cmd/hwlab-gateway-simu/main.mjs && node --check scripts/cloud-api-runtime-smoke.mjs && node --check scripts/code-agent-chat-smoke.mjs && node --check scripts/dev-edge-health-smoke.mjs && node --check scripts/src/dev-edge-health-smoke-lib.mjs && node --check scripts/validate-contract.mjs && node --check scripts/deploy-desired-state-plan.mjs && node --check scripts/src/deploy-desired-state-plan.mjs && node --check scripts/artifact-runtime-readiness-guard.mjs && node --check scripts/src/artifact-runtime-readiness-guard.mjs && node --check scripts/artifact-runtime-readiness-guard.test.mjs && node --check scripts/report-lifecycle.mjs && node --check scripts/report-lifecycle.test.mjs && node --check scripts/validate-dev-gate-report.mjs && node --check scripts/dev-m3-hardware-loop-smoke.test.mjs && node --check scripts/dev-cloud-workbench-smoke.test.mjs && node --check scripts/validate-dev-m3-cardinality.mjs && node --check scripts/validate-artifact-catalog.mjs && node --check scripts/refresh-artifact-catalog.mjs && node --check scripts/dev-artifact-publish.mjs && node --check scripts/src/dev-artifact-services.mjs && node --check scripts/src/registry-capabilities.mjs && node --check scripts/preflight-dev-base-image.mjs && node --check scripts/src/dev-base-image-preflight.mjs && node --check scripts/dev-evidence-blocker-aggregator.mjs && node --check scripts/src/dev-evidence-blocker-aggregator.mjs && node --check scripts/d601-k3s-readonly-observability.mjs && node --check scripts/src/d601-k3s-readonly-observability.mjs && node --check scripts/dev-runtime-migration.mjs && node --check scripts/src/dev-runtime-migration.mjs && node --check scripts/src/dev-runtime-migration.test.mjs && node --check scripts/l2-runtime-contract-smoke.mjs && node --check scripts/patch-panel-runtime-smoke.mjs && node --check scripts/export-web-gate-summary.mjs && node --check scripts/l6-cli-web-smoke.mjs && node --check tools/hwlab-cli/bin/hwlab-cli.mjs && node --check tools/hwlab-cli/lib/cli.mjs && node --check web/hwlab-cloud-web/app.mjs && node --check web/hwlab-cloud-web/gate-summary.mjs && node --check web/hwlab-cloud-web/scripts/check.mjs && node --check web/hwlab-cloud-web/scripts/build.mjs && node --check web/hwlab-cloud-web/scripts/dist-contract.mjs && node scripts/validate-contract.mjs && node scripts/validate-dev-gate-report.mjs && node scripts/report-lifecycle.test.mjs && node scripts/validate-dev-m3-cardinality.mjs && node scripts/validate-artifact-catalog.mjs && node scripts/deploy-desired-state-plan.mjs --check && node scripts/dev-runtime-migration.mjs --check && node scripts/dev-evidence-blocker-aggregator.mjs --check && node scripts/l2-runtime-contract-smoke.mjs && node scripts/l6-cli-web-smoke.mjs && node web/hwlab-cloud-web/scripts/check.mjs && node scripts/code-agent-chat-smoke.mjs && node --test scripts/artifact-runtime-readiness-guard.test.mjs scripts/dev-m3-hardware-loop-smoke.test.mjs scripts/dev-cloud-workbench-smoke.test.mjs scripts/deploy-desired-state-plan.test.mjs scripts/src/dev-deploy-apply.test.mjs scripts/src/dev-runtime-migration.test.mjs internal/agent/index.test.mjs internal/audit/index.test.mjs internal/db/schema.test.mjs internal/db/runtime-store.test.mjs internal/cloud/json-rpc.test.mjs internal/cloud/server.test.mjs internal/sim/model.test.mjs internal/patchpanel/model.test.mjs internal/patchpanel/runtime.test.mjs && node scripts/cloud-api-runtime-smoke.mjs && sh -n scripts/bootstrap-skills.sh scripts/worker-entrypoint.sh",
     "dev-base-image:preflight": "node scripts/preflight-dev-base-image.mjs",
     "cloud-api:smoke": "node scripts/cloud-api-runtime-smoke.mjs",
     "m1:smoke": "node scripts/m1-contract-smoke.mjs",
diff --git a/scripts/dev-m3-hardware-loop-smoke.mjs b/scripts/dev-m3-hardware-loop-smoke.mjs
index 615079bd..27f7ba96 100644
--- a/scripts/dev-m3-hardware-loop-smoke.mjs
+++ b/scripts/dev-m3-hardware-loop-smoke.mjs
@@ -419,6 +419,21 @@ async function collectReadOnlySupplementalEvidence() {
   const patchPanelEndpointMap = patchPanel?.env.HWLAB_PATCH_PANEL_ENDPOINT_MAP
     ? JSON.parse(patchPanel.env.HWLAB_PATCH_PANEL_ENDPOINT_MAP)
     : {};
+  const patchPanelWiringConfig = patchPanel?.env.HWLAB_PATCH_PANEL_WIRING_CONFIG
+    ? JSON.parse(patchPanel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG)
+    : null;
+  const patchPanelHasManifestRoute =
+    patchPanelWiringConfig?.status === "active" &&
+    patchPanelWiringConfig?.constraints?.propagation === "patch-panel-only" &&
+    patchPanelWiringConfig?.constraints?.localLoopbackSubstituteAllowed === false &&
+    (patchPanelWiringConfig?.connections ?? []).some(
+      (connection) =>
+        connection.from?.resourceId === requiredM3Connection.fromResourceId &&
+        connection.from?.port === requiredM3Connection.fromPort &&
+        connection.to?.resourceId === requiredM3Connection.toResourceId &&
+        connection.to?.port === requiredM3Connection.toPort &&
+        connection.mode === "exclusive"
+    );
   const boxReadyForM3 =
     box?.kind === "StatefulSet" &&
     box?.replicas === 2 &&
@@ -436,7 +451,13 @@ async function collectReadOnlySupplementalEvidence() {
     ]);
   const patchPanelReadyForM3 =
     patchPanel?.replicas === 1 &&
-    patchPanelEndpointMap.res_boxsimu_2 === "http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201";
+    patchPanel?.m3Route?.fromResourceId === requiredM3Connection.fromResourceId &&
+    patchPanel?.m3Route?.fromPort === requiredM3Connection.fromPort &&
+    patchPanel?.m3Route?.patchPanelServiceId === "hwlab-patch-panel" &&
+    patchPanel?.m3Route?.toResourceId === requiredM3Connection.toResourceId &&
+    patchPanel?.m3Route?.toPort === requiredM3Connection.toPort &&
+    patchPanelEndpointMap.res_boxsimu_2 === "http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201" &&
+    patchPanelHasManifestRoute;
   const manifestReadyForM3 = boxReadyForM3 && gatewayReadyForM3 && patchPanelReadyForM3 && hasInstanceServices;
 
   return [
@@ -466,7 +487,8 @@ async function collectReadOnlySupplementalEvidence() {
           },
           "hwlab-patch-panel": {
             replicas: patchPanel?.replicas ?? null,
-            env: patchPanel?.env ?? null
+            env: patchPanel?.env ?? null,
+            firstClassWiringConfig: patchPanelWiringConfig
           },
           instanceServices: [...serviceMap.keys()].filter((name) =>
             name.startsWith("hwlab-box-simu-") || name.startsWith("hwlab-gateway-simu-")
diff --git a/scripts/src/deploy-contract-plan.mjs b/scripts/src/deploy-contract-plan.mjs
index 26821d64..e2301726 100644
--- a/scripts/src/deploy-contract-plan.mjs
+++ b/scripts/src/deploy-contract-plan.mjs
@@ -144,9 +144,11 @@ function validateSource(ctx, manifest) {
   const cloudApi = servicesById.get("hwlab-cloud-api");
   const tunnelClient = servicesById.get("hwlab-tunnel-client");
   const cli = servicesById.get("hwlab-cli");
+  const patchPanel = servicesById.get("hwlab-patch-panel");
   expectEqual(ctx, cloudApi?.env?.HWLAB_PUBLIC_ENDPOINT, endpoints.api?.url, "$.services.hwlab-cloud-api.env.HWLAB_PUBLIC_ENDPOINT", "cloud API public endpoint env");
   validateCloudApiDbSource(ctx, cloudApi?.env ?? {});
   validateCloudApiCodeAgentSource(ctx, cloudApi?.env ?? {});
+  validateM3PatchPanelSource(ctx, patchPanel);
   expectEqual(ctx, cli?.env?.HWLAB_CLI_ENDPOINT, endpoints.api?.url, "$.services.hwlab-cli.env.HWLAB_CLI_ENDPOINT", "CLI endpoint env");
   expectEqual(ctx, tunnelClient?.env?.HWLAB_FRP_PUBLIC_PORT, String(expectedPorts.api), "$.services.hwlab-tunnel-client.env.HWLAB_FRP_PUBLIC_PORT", "tunnel API public port env");
   expectEqual(ctx, tunnelClient?.env?.HWLAB_FRP_WEB_PUBLIC_PORT, String(expectedPorts.frontend), "$.services.hwlab-tunnel-client.env.HWLAB_FRP_WEB_PUBLIC_PORT", "tunnel frontend public port env");
@@ -189,6 +191,78 @@ function validateSource(ctx, manifest) {
   return { manifest, endpoints, servicesById, proxies, serviceMappings, healthPath: manifest.health?.path };
 }
 
+function requiredM3Route() {
+  return {
+    fromResourceId: "res_boxsimu_1",
+    fromPort: "DO1",
+    patchPanelServiceId: "hwlab-patch-panel",
+    toResourceId: "res_boxsimu_2",
+    toPort: "DI1"
+  };
+}
+
+function parseJsonEnv(ctx, value, jsonPath, label) {
+  try {
+    return JSON.parse(String(value ?? ""));
+  } catch (error) {
+    addDiagnostic(ctx, "invalid_json", jsonPath, `${label} must be JSON`, {
+      actual: error instanceof Error ? error.message : String(error)
+    });
+    return null;
+  }
+}
+
+function validateM3PatchPanelSource(ctx, patchPanel) {
+  const route = requiredM3Route();
+  expectEqual(ctx, patchPanel?.m3Route?.fromResourceId, route.fromResourceId, "$.services.hwlab-patch-panel.m3Route.fromResourceId", "patch panel first-class M3 source resource");
+  expectEqual(ctx, patchPanel?.m3Route?.fromPort, route.fromPort, "$.services.hwlab-patch-panel.m3Route.fromPort", "patch panel first-class M3 source port");
+  expectEqual(ctx, patchPanel?.m3Route?.patchPanelServiceId, route.patchPanelServiceId, "$.services.hwlab-patch-panel.m3Route.patchPanelServiceId", "patch panel first-class M3 route owner");
+  expectEqual(ctx, patchPanel?.m3Route?.toResourceId, route.toResourceId, "$.services.hwlab-patch-panel.m3Route.toResourceId", "patch panel first-class M3 target resource");
+  expectEqual(ctx, patchPanel?.m3Route?.toPort, route.toPort, "$.services.hwlab-patch-panel.m3Route.toPort", "patch panel first-class M3 target port");
+
+  const endpointMap = parseJsonEnv(
+    ctx,
+    patchPanel?.env?.HWLAB_PATCH_PANEL_ENDPOINT_MAP,
+    "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_ENDPOINT_MAP",
+    "patch panel endpoint map"
+  );
+  expectEqual(
+    ctx,
+    endpointMap?.res_boxsimu_2,
+    "http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201",
+    "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_ENDPOINT_MAP.res_boxsimu_2",
+    "patch panel M3 target endpoint"
+  );
+
+  const wiring = parseJsonEnv(
+    ctx,
+    patchPanel?.env?.HWLAB_PATCH_PANEL_WIRING_CONFIG,
+    "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG",
+    "patch panel wiring config"
+  );
+  const connection = wiring?.connections?.[0];
+  expectEqual(ctx, wiring?.status, "active", "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG.status", "patch panel M3 wiring status");
+  expectEqual(
+    ctx,
+    wiring?.constraints?.propagation,
+    "patch-panel-only",
+    "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG.constraints.propagation",
+    "patch panel M3 wiring propagation"
+  );
+  expectEqual(
+    ctx,
+    wiring?.constraints?.localLoopbackSubstituteAllowed,
+    false,
+    "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG.constraints.localLoopbackSubstituteAllowed",
+    "patch panel M3 wiring forbids loopback substitute"
+  );
+  expectEqual(ctx, connection?.from?.resourceId, route.fromResourceId, "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG.connections[0].from.resourceId", "patch panel M3 source resource");
+  expectEqual(ctx, connection?.from?.port, route.fromPort, "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG.connections[0].from.port", "patch panel M3 source port");
+  expectEqual(ctx, connection?.to?.resourceId, route.toResourceId, "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG.connections[0].to.resourceId", "patch panel M3 target resource");
+  expectEqual(ctx, connection?.to?.port, route.toPort, "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG.connections[0].to.port", "patch panel M3 target port");
+  expectEqual(ctx, connection?.mode, "exclusive", "$.services.hwlab-patch-panel.env.HWLAB_PATCH_PANEL_WIRING_CONFIG.connections[0].mode", "patch panel M3 route mode");
+}
+
 function validateCloudApiDbSource(ctx, env) {
   const alias = DEV_DB_ENV_CONTRACT.dns;
   expectEqual(ctx, env.HWLAB_CLOUD_DB_URL, "secretRef:hwlab-cloud-api-dev-db/database-url", "$.services.hwlab-cloud-api.env.HWLAB_CLOUD_DB_URL", "cloud API DB URL Secret reference");
diff --git a/scripts/validate-contract.mjs b/scripts/validate-contract.mjs
index 8c093a59..4d0408cb 100644
--- a/scripts/validate-contract.mjs
+++ b/scripts/validate-contract.mjs
@@ -155,7 +155,9 @@ assert.equal(deployServicesById.has("hwlab-agent-worker"), true);
 assert.equal(deployServicesById.has("hwlab-agent-skills"), true);
 
 const cloudApi = deployServicesById.get("hwlab-cloud-api");
+const patchPanel = deployServicesById.get("hwlab-patch-panel");
 const cloudApiWorkloadEnv = getWorkloadEnv(k8sWorkloads, "hwlab-cloud-api");
+const patchPanelWorkloadEnv = getWorkloadEnv(k8sWorkloads, "hwlab-patch-panel");
 assert.equal(deployManifest.health.path, "/health/live", "deploy health source path");
 assert.equal(deployManifest.publicEndpoints.frontend.url, "http://74.48.78.17:16666", "deploy frontend endpoint");
 assert.equal(deployManifest.publicEndpoints.api.url, "http://74.48.78.17:16667", "deploy api endpoint");
@@ -208,6 +210,7 @@ assert.notEqual(
 );
 assert.equal(cloudApi.env.OPENAI_API_KEY, codeAgentSecretRefPlaceholder(), "cloud-api Code Agent OpenAI key must be a Secret reference placeholder");
 assertCodeAgentProviderWorkloadContract(cloudApiWorkloadEnv);
+assertM3PatchPanelDeployContract(patchPanel, patchPanelWorkloadEnv);
 assertDbForbiddenInvalidHostContract();
 assertValidationDoesNotExposeSecretValues(cloudApi.env, cloudApiWorkloadEnv);
 
@@ -262,6 +265,49 @@ function assertCodeAgentProviderWorkloadContract(env) {
   assert.equal(apiKey?.key, secretRef.secretKey, "cloud-api workload Code Agent OpenAI Secret key");
 }
 
+function assertM3PatchPanelDeployContract(manifestService, workloadEnv) {
+  const route = {
+    fromResourceId: "res_boxsimu_1",
+    fromPort: "DO1",
+    patchPanelServiceId: "hwlab-patch-panel",
+    toResourceId: "res_boxsimu_2",
+    toPort: "DI1"
+  };
+  assert.deepEqual(manifestService.m3Route, route, "patch-panel deploy manifest first-class M3 route");
+  const manifestEndpointMap = JSON.parse(manifestService.env.HWLAB_PATCH_PANEL_ENDPOINT_MAP);
+  const workloadEndpointMap = JSON.parse(workloadEnv.HWLAB_PATCH_PANEL_ENDPOINT_MAP?.value ?? "{}");
+  assert.equal(
+    manifestEndpointMap.res_boxsimu_2,
+    "http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201",
+    "patch-panel deploy manifest M3 endpoint"
+  );
+  assert.deepEqual(workloadEndpointMap, manifestEndpointMap, "patch-panel workload M3 endpoint map");
+
+  const manifestWiring = JSON.parse(manifestService.env.HWLAB_PATCH_PANEL_WIRING_CONFIG);
+  const workloadWiring = JSON.parse(workloadEnv.HWLAB_PATCH_PANEL_WIRING_CONFIG?.value ?? "{}");
+  assert.deepEqual(workloadWiring, manifestWiring, "patch-panel workload first-class M3 wiring config");
+  assert.equal(manifestWiring.status, "active", "patch-panel M3 wiring status");
+  assert.equal(manifestWiring.constraints.propagation, "patch-panel-only", "patch-panel M3 wiring propagation");
+  assert.equal(
+    manifestWiring.constraints.localLoopbackSubstituteAllowed,
+    false,
+    "patch-panel M3 wiring loopback substitute"
+  );
+  assert.deepEqual(manifestWiring.connections, [
+    {
+      from: {
+        resourceId: route.fromResourceId,
+        port: route.fromPort
+      },
+      to: {
+        resourceId: route.toResourceId,
+        port: route.toPort
+      },
+      mode: "exclusive"
+    }
+  ], "patch-panel M3 wiring route");
+}
+
 function assertDbForbiddenInvalidHostContract() {
   const invalidHost = parseDbUrlContract("postgres://user:password@hwlab-dev-db.invalid:5432/hwlab");
   assert.equal(invalidHost.ok, false, "DEV DB contract must reject .invalid runtime hosts");
diff --git a/scripts/validate-dev-m3-cardinality.mjs b/scripts/validate-dev-m3-cardinality.mjs
index a730e043..6f670314 100644
--- a/scripts/validate-dev-m3-cardinality.mjs
+++ b/scripts/validate-dev-m3-cardinality.mjs
@@ -9,6 +9,32 @@ const namespace = "hwlab-dev";
 const m3EndpointMap = Object.freeze({
   res_boxsimu_2: "http://hwlab-box-simu-2.hwlab-dev.svc.cluster.local:7201"
 });
+const m3WiringConfig = Object.freeze({
+  wiringConfigId: "wir_m3_do1_di1",
+  projectId: "prj_m3_hardware_loop",
+  gatewaySessionId: "gws_gwsimu_1",
+  name: "M3 simulated DO1 to DI1 patch wiring",
+  status: "active",
+  connections: [
+    {
+      from: {
+        resourceId: "res_boxsimu_1",
+        port: "DO1"
+      },
+      to: {
+        resourceId: "res_boxsimu_2",
+        port: "DI1"
+      },
+      mode: "exclusive"
+    }
+  ],
+  constraints: {
+    propagation: "patch-panel-only",
+    localLoopbackSubstituteAllowed: false
+  },
+  createdAt: "2026-05-21T00:00:00.000Z",
+  updatedAt: "2026-05-21T00:00:00.000Z"
+});
 const expected = Object.freeze({
   "hwlab-box-simu": {
     kind: "StatefulSet",
@@ -39,8 +65,16 @@ const expected = Object.freeze({
   "hwlab-patch-panel": {
     kind: "Deployment",
     replicas: 1,
+    m3Route: {
+      fromResourceId: "res_boxsimu_1",
+      fromPort: "DO1",
+      patchPanelServiceId: "hwlab-patch-panel",
+      toResourceId: "res_boxsimu_2",
+      toPort: "DI1"
+    },
     env: {
-      HWLAB_PATCH_PANEL_ENDPOINT_MAP: m3EndpointMap
+      HWLAB_PATCH_PANEL_ENDPOINT_MAP: m3EndpointMap,
+      HWLAB_PATCH_PANEL_WIRING_CONFIG: m3WiringConfig
     }
   }
 });
@@ -197,6 +231,9 @@ function assertDeployManifestCardinality(deploy) {
       assertSameMembers(service.instanceNames ?? [], requirement.instanceNames, `${serviceId} deploy instanceNames`);
       assert.equal(service.identityStrategy, "indexed-workloads", `${serviceId} deploy identityStrategy`);
     }
+    if (requirement.m3Route) {
+      assert.deepEqual(service.m3Route, requirement.m3Route, `${serviceId} deploy first-class M3 route`);
+    }
 
     for (const [name, values] of Object.entries(requirement.env)) {
       if (Array.isArray(values)) {
@@ -245,6 +282,25 @@ function assertM3FixtureWiring(topology) {
   ], "M3 fixture wiring config");
 }
 
+function assertM3RouteConfig(value, label) {
+  assert.deepEqual(value, m3WiringConfig, label);
+  assert.deepEqual(value.connections, [
+    {
+      from: {
+        resourceId: "res_boxsimu_1",
+        port: "DO1"
+      },
+      to: {
+        resourceId: "res_boxsimu_2",
+        port: "DI1"
+      },
+      mode: "exclusive"
+    }
+  ], `${label} required route`);
+  assert.equal(value.constraints.propagation, "patch-panel-only", `${label} propagation`);
+  assert.equal(value.constraints.localLoopbackSubstituteAllowed, false, `${label} loopback substitute`);
+}
+
 const [deploy, workloads, services, topology] = await Promise.all([
   readJson("deploy/deploy.json"),
   readJson("deploy/k8s/base/workloads.yaml"),
@@ -252,10 +308,25 @@ const [deploy, workloads, services, topology] = await Promise.all([
   readJson("fixtures/mvp/m3-hardware-loop/topology.json")
 ]);
 
+const patchPanelWorkloadEnv = envMap(
+  workloadByName(workloads)
+    .get("hwlab-patch-panel")
+    ?.spec?.template?.spec?.containers?.find((item) => item.name === "hwlab-patch-panel")
+    ?.env
+);
+
 assertDeployManifestCardinality(deploy);
 assertDeployManifestInstanceMappings(deploy);
 assertDevK8sCardinality(workloads);
 assertDevK8sInstanceServices(services);
 assertM3FixtureWiring(topology);
+assertM3RouteConfig(
+  parseEnvValue(patchPanelWorkloadEnv.HWLAB_PATCH_PANEL_WIRING_CONFIG),
+  "DEV workload first-class M3 patch-panel wiring config"
+);
+assertM3RouteConfig(
+  parseEnvValue(deploy.services.find((service) => service.serviceId === "hwlab-patch-panel")?.env?.HWLAB_PATCH_PANEL_WIRING_CONFIG),
+  "deploy manifest first-class M3 patch-panel wiring config"
+);
 
 console.log("validated DEV M3 manifest cardinality: 2 distinct box-simu, 2 distinct gateway-simu, 1 patch-panel, M3 DO1->DI1 wiring");