diff --git a/apps/control-station/test/devicePluginContracts.test.mjs b/apps/control-station/test/devicePluginContracts.test.mjs
index cd9fc17..b1070cd 100644
--- a/apps/control-station/test/devicePluginContracts.test.mjs
+++ b/apps/control-station/test/devicePluginContracts.test.mjs
@@ -1,4 +1,5 @@
 import assert from "node:assert/strict";
+import { readFile } from "node:fs/promises";
 import { after, before, test } from "node:test";
 
 import { createServer } from "vite";
@@ -9,10 +10,14 @@ let createDevicePluginRegistry;
 let xgridsK1Manifest;
 let xgridsK1Actions;
 let xgridsK1Api;
+let ApiError;
+let localizeRuntimeMessage;
 let lifecycle;
 let projectName;
 let automaticSourceStart;
 let presentation;
+let operatorIntentGeneration;
+let configuration;
 
 before(async () => {
   server = await createServer({
@@ -41,9 +46,18 @@ before(async () => {
   presentation = await server.ssrLoadModule(
     "@xgrids-k1/frontend/presentation.ts",
   );
-  ({ xgridsK1Api } = await server.ssrLoadModule(
+  operatorIntentGeneration = await server.ssrLoadModule(
+    "@xgrids-k1/frontend/operatorIntentGeneration.ts",
+  );
+  configuration = await server.ssrLoadModule(
+    "@xgrids-k1/frontend/configuration.ts",
+  );
+  ({ xgridsK1Api, ApiError } = await server.ssrLoadModule(
     "@xgrids-k1/frontend/api.ts",
   ));
+  ({ localizeRuntimeMessage } = await server.ssrLoadModule(
+    "@xgrids-k1/frontend/messages.ts",
+  ));
 });
 
 after(async () => {
@@ -200,6 +214,151 @@ test("installed XGRIDS frontend manifest exposes the semantic v1alpha2 actions",
   assert.equal(xgridsK1Actions.acquisitionStop, "acquisition.stop");
 });
 
+test("one operator action can open at most one K1 control session", () => {
+  assert.equal(lifecycle.controlSessionEntryPlan("idle", false, true), "open");
+  assert.equal(lifecycle.controlSessionEntryPlan("failed", false, true), "open");
+  assert.equal(lifecycle.controlSessionEntryPlan("failed", false, false), "failed");
+  assert.equal(lifecycle.controlSessionEntryPlan("failed", true, true), "failed");
+  assert.equal(
+    lifecycle.controlSessionEntryPlan("idle", true, true),
+    "duplicate-open",
+  );
+  assert.equal(
+    lifecycle.controlSessionEntryPlan("connection-ready", true, false),
+    "continue",
+  );
+});
+
+test("K1 operator intent stays invalid after runtime deactivate and reactivate", () => {
+  const generation = new operatorIntentGeneration.OperatorIntentGeneration();
+  generation.activateRuntime();
+  const oldIntent = generation.beginOperatorIntent();
+
+  assert.ok(oldIntent);
+  assert.equal(generation.isOperatorIntentCurrent(oldIntent), true);
+
+  generation.deactivateRuntime();
+  generation.activateRuntime();
+  const freshIntent = generation.beginOperatorIntent();
+
+  assert.ok(freshIntent);
+  assert.notEqual(freshIntent.runtimeGeneration, oldIntent.runtimeGeneration);
+  assert.equal(generation.isOperatorIntentCurrent(oldIntent), false);
+  assert.equal(generation.isOperatorIntentCurrent(freshIntent), true);
+});
+
+test("stale K1 intent cannot continue past an await after runtime reactivation", async () => {
+  const generation = new operatorIntentGeneration.OperatorIntentGeneration();
+  generation.activateRuntime();
+  const oldIntent = generation.beginOperatorIntent();
+  assert.ok(oldIntent);
+
+  let resolveOldRead;
+  const oldRead = new Promise((resolve) => {
+    resolveOldRead = resolve;
+  });
+  const writes = [];
+  const assertOldIntent = () => {
+    if (!generation.isOperatorIntentCurrent(oldIntent)) {
+      throw new Error("stale operator intent");
+    }
+  };
+  const oldContinuation = operatorIntentGeneration.awaitWhileIntentCurrent(
+    assertOldIntent,
+    () => oldRead,
+  ).then(() => writes.push("old-checkpoint"));
+
+  generation.deactivateRuntime();
+  generation.activateRuntime();
+  const freshIntent = generation.beginOperatorIntent();
+  assert.ok(freshIntent);
+  resolveOldRead({ phase: "connection-ready" });
+
+  await assert.rejects(oldContinuation, /stale operator intent/);
+  assert.deepEqual(writes, []);
+
+  const assertFreshIntent = () => {
+    if (!generation.isOperatorIntentCurrent(freshIntent)) {
+      throw new Error("stale fresh intent");
+    }
+  };
+  await operatorIntentGeneration.awaitWhileIntentCurrent(
+    assertFreshIntent,
+    async () => ({ phase: "connection-ready" }),
+  );
+  writes.push("fresh-checkpoint");
+  assert.deepEqual(writes, ["fresh-checkpoint"]);
+});
+
+test("a fresh explicit K1 intent supersedes the previous intent in one runtime", () => {
+  const generation = new operatorIntentGeneration.OperatorIntentGeneration();
+  generation.activateRuntime();
+  const first = generation.beginOperatorIntent();
+  const second = generation.beginOperatorIntent();
+
+  assert.ok(first);
+  assert.ok(second);
+  assert.equal(first.runtimeGeneration, second.runtimeGeneration);
+  assert.notEqual(first.intentGeneration, second.intentGeneration);
+  assert.equal(generation.isOperatorIntentCurrent(first), false);
+  assert.equal(generation.isOperatorIntentCurrent(second), true);
+});
+
+test("canonical K1 launch wires the generation guard through every async stage", async () => {
+  const hookSource = await readFile(
+    new URL(
+      "../../../plugins/xgrids-k1/frontend/src/useXgridsK1Runtime.ts",
+      import.meta.url,
+    ),
+    "utf8",
+  );
+  const canonicalStart = hookSource.slice(
+    hookSource.indexOf("const startCanonicalAcquisition"),
+    hookSource.indexOf("const prepareAcquisition"),
+  );
+  const pollingLoop = hookSource.slice(
+    hookSource.indexOf("async function waitForControlPhase"),
+    hookSource.indexOf("function messageFor"),
+  );
+
+  assert.doesNotMatch(hookSource, /mounted\.current/);
+  assert.match(canonicalStart, /beginOperatorIntent\(\)/);
+  assert.match(canonicalStart, /isOperatorIntentCurrent\(intentToken\)/);
+  assert.doesNotMatch(canonicalStart, /await xgridsK1Api\./);
+  assert.doesNotMatch(canonicalStart, /await waitForControlPhase\(/);
+  assert.ok(
+    canonicalStart.match(/awaitWhileIntentCurrent\(/g)?.length >= 8,
+    "each canonical REST/checkpoint boundary must use the intent guard",
+  );
+  assert.match(pollingLoop, /for \(;;\) \{\s*assertOperatorIntentCurrent\(\)/);
+  assert.equal(pollingLoop.match(/awaitWhileIntentCurrent\(/g)?.length, 2);
+});
+
+test("K1 control errors stay informative and only fetch failures mark transport unavailable", async () => {
+  assert.equal(
+    localizeRuntimeMessage(
+      "control MQTT connect call failed: [Errno 61] Connection refused",
+    ),
+    "Управляющее соединение со сканером не открылось: устройство не приняло MQTT-соединение. Команды сканирования не отправлялись.",
+  );
+
+  const domainError = new ApiError("Диалог остановлен до команды START.");
+  assert.equal(domainError.transportUnavailable, false);
+
+  const originalFetch = globalThis.fetch;
+  globalThis.fetch = async () => {
+    throw new TypeError("synthetic network failure");
+  };
+  try {
+    await assert.rejects(
+      () => xgridsK1Api.getState(),
+      (error) => error instanceof ApiError && error.transportUnavailable === true,
+    );
+  } finally {
+    globalThis.fetch = originalFetch;
+  }
+});
+
 test("v1alpha2 compatibility profile is exact-key and rejects duplicated profile status", () => {
   const document = manifestDocument({ apiVersion: "missioncore.nodedc/v1alpha2" });
   document.spec.compatibilityProfiles[0].status = "verified";
@@ -404,6 +563,48 @@ test("replay ignores a stale failed live acquisition", () => {
   );
 });
 
+test("K1 configuration anchors expose future modes without enabling them", () => {
+  assert.equal(configuration.SUPPORTED_CONNECTION_MODE, "bridge");
+  assert.equal(configuration.SUPPORTED_MOUNT_TYPE, "handheld");
+  assert.equal(configuration.SUPPORTED_GNSS_MODE, "none");
+  assert.deepEqual(
+    configuration.connectionModeOptions.map(({ value, disabled = false }) => ({ value, disabled })),
+    [
+      { value: "bridge", disabled: false },
+      { value: "quick-connect", disabled: true },
+      { value: "direct-connect", disabled: true },
+    ],
+  );
+  assert.deepEqual(
+    configuration.mountTypeOptions.map(({ value, disabled = false }) => ({ value, disabled })),
+    [
+      { value: "handheld", disabled: false },
+      { value: "vehicle-mounted", disabled: true },
+      { value: "uav", disabled: true },
+      { value: "backpack", disabled: true },
+    ],
+  );
+  assert.deepEqual(
+    configuration.gnssModeOptions.map(({ value, disabled = false }) => ({ value, disabled })),
+    [
+      { value: "none", disabled: false },
+      { value: "rtk", disabled: true },
+      { value: "ppk", disabled: true },
+    ],
+  );
+});
+
+test("a provisioned address is not presented as a verified device connection", () => {
+  assert.equal(lifecycle.normalizeRuntimePhase({
+    phase: "connected",
+    application_control_session: { state: "idle" },
+  }), "configuring");
+  assert.equal(lifecycle.normalizeRuntimePhase({
+    phase: "connected",
+    application_control_session: { state: "connection-ready" },
+  }), "connected");
+});
+
 test("provisioning intent keeps one idempotency key and exposes unsafe outcomes", () => {
   let created = 0;
   const createUuid = () => {
@@ -437,7 +638,7 @@ test("device mutations send explicit nested compatibility attestation", async ()
   const attestation = {
     firmware_version: "3.0.2",
     topology: "direct-lan",
-    operator_confirmed: true,
+    verification: "live-device-info",
   };
 
   try {
@@ -445,11 +646,14 @@ test("device mutations send explicit nested compatibility attestation", async ()
       device_id: "ble-device",
       ssid: "lab-network",
       password: syntheticCredential,
+      connection_mode: "bridge",
       compatibility_attestation: attestation,
       idempotency_key: "network-provision:test",
     });
     await xgridsK1Api.prepareAcquisition({
       project_name: "Mission 01",
+      mount_type: "handheld",
+      gnss_mode: "none",
       compatibility_attestation: attestation,
     });
   } finally {
diff --git a/plugins/xgrids-k1/frontend/src/XgridsK1Connection.tsx b/plugins/xgrids-k1/frontend/src/XgridsK1Connection.tsx
index aa92eab..3036792 100644
--- a/plugins/xgrids-k1/frontend/src/XgridsK1Connection.tsx
+++ b/plugins/xgrids-k1/frontend/src/XgridsK1Connection.tsx
@@ -1,4 +1,3 @@
-import { useCallback, useState } from "react";
 import { Button, StatusBadge, type StatusTone } from "@nodedc/ui-react";
 
 import type { DevicePluginConnectionProps } from "@mission-core/plugin-sdk";
@@ -19,10 +18,6 @@ import { useXgridsK1Controller } from "./runtimeContext";
 export function XgridsK1Connection({ model, host }: DevicePluginConnectionProps) {
   const controller = useXgridsK1Controller();
   const { state, error, refresh, clearError } = controller;
-  const [profileConfirmed, setProfileConfirmed] = useState(false);
-  const updateProfileConfirmation = useCallback((confirmed: boolean) => {
-    setProfileConfirmed(confirmed);
-  }, []);
 
   const confirmedLive = isConfirmedLiveState(state);
   const sourceRuntimeBusy = isSourceRuntimeBusy(state);
@@ -51,7 +46,7 @@ export function XgridsK1Connection({ model, host }: DevicePluginConnectionProps)
           <span className="error-banner__dot" aria-hidden="true" />
           <div>
             <strong>Локальная операция завершилась ошибкой</strong>
-            <p>{localizeRuntimeMessage(error)}</p>
+            <p>{error}</p>
           </div>
           <div className="error-banner__actions">
             <Button size="compact" variant="secondary" onClick={() => void refresh()}>Обновить состояние</Button>
@@ -79,13 +74,10 @@ export function XgridsK1Connection({ model, host }: DevicePluginConnectionProps)
           controller={controller}
           phaseLabel={connectionPhaseLabel}
           phaseTone={connectionPhaseTone}
-          profileConfirmed={profileConfirmed}
-          onProfileConfirmedChange={updateProfileConfirmation}
         />
         <div className="device-workspace__side">
           <K1AcquisitionPipeline
             controller={controller}
-            profileConfirmed={profileConfirmed}
             openSpatialScene={host.openSpatialScene}
             activateAutomaticSpatialSource={host.activateAutomaticSpatialSource}
           />
diff --git a/plugins/xgrids-k1/frontend/src/api.ts b/plugins/xgrids-k1/frontend/src/api.ts
index e9f9002..1930a89 100644
--- a/plugins/xgrids-k1/frontend/src/api.ts
+++ b/plugins/xgrids-k1/frontend/src/api.ts
@@ -138,7 +138,34 @@ export interface XgridsApplicationControlSession {
   outcome_unknown: boolean;
   failure?: {
     code?: string;
+    reason_code?: string;
     message?: string;
+    failed_phase?: string | null;
+    dialogue_stage?: string | null;
+    transport_state?: string | null;
+    publish_attempts?: number | null;
+    qos2_completions?: number | null;
+    correlated_responses?: number | null;
+    ignored_known_responses?: number | null;
+    late_known_responses?: number | null;
+    modeling_command_attempted?: boolean | null;
+    diagnostic_snapshot_unavailable?: string[];
+    diagnostic_evidence_unavailable?: string[];
+    correlation_failure?: {
+      phase?: string;
+      operation_key?: string;
+      response_topic?: string;
+      reason_code?: string;
+      reason?: string;
+    } | null;
+    compatibility_failure?: {
+      phase?: string;
+      operation_key?: string;
+      response_topic?: string;
+      reason_code?: string;
+      expected?: Record<string, unknown>;
+      observed?: Record<string, unknown>;
+    } | null;
     safe_to_retry?: boolean;
   } | null;
   dialogue?: Record<string, unknown> | null;
@@ -153,6 +180,8 @@ export interface XgridsAcquisition {
   compatibility_profile_id: string;
   control_mode: "operator-manual" | "plugin-commanded" | "observe-only";
   project_name?: string | null;
+  mount_type?: "handheld" | null;
+  gnss_mode?: "none" | null;
   cleanup_pending?: boolean;
   requested_streams: string[];
   target_host: string;
@@ -260,6 +289,7 @@ export interface XgridsK1State {
   devices?: BleDevice[];
   selected_device_id?: string | null;
   k1_ip?: string | null;
+  connection_mode?: "bridge" | null;
   foxglove_ws_url?: string | null;
   foxglove_viewer_url?: string | null;
   rerun_grpc_url?: string | null;
@@ -293,13 +323,14 @@ export interface ScanRequest {
 export interface CompatibilityAttestation {
   firmware_version: "3.0.2";
   topology: "direct-lan";
-  operator_confirmed: true;
+  verification: "live-device-info";
 }
 
 export interface ConnectRequest {
   device_id: string;
   ssid: string;
   password: string;
+  connection_mode: "bridge";
   compatibility_attestation: CompatibilityAttestation;
   operation_id?: string;
   idempotency_key?: string;
@@ -307,6 +338,8 @@ export interface ConnectRequest {
 
 export interface PrepareAcquisitionRequest {
   project_name: string;
+  mount_type: "handheld";
+  gnss_mode: "none";
   host?: string;
   duration_seconds?: number;
   requested_streams?: RequestedStreamId[];
@@ -398,11 +431,13 @@ export interface EnterApplicationWorkspaceRequest {
 
 export class ApiError extends Error {
   readonly status: number;
+  readonly transportUnavailable: boolean;
 
-  constructor(message: string, status = 0) {
+  constructor(message: string, status = 0, transportUnavailable = false) {
     super(message);
     this.name = "ApiError";
     this.status = status;
+    this.transportUnavailable = transportUnavailable;
   }
 }
 
@@ -433,7 +468,11 @@ async function requestJson(path: string, init?: RequestInit): Promise<unknown> {
       },
     });
   } catch {
-    throw new ApiError("Не удалось подключиться к локальному сервису устройства.");
+    throw new ApiError(
+      "Не удалось подключиться к локальному сервису устройства.",
+      0,
+      true,
+    );
   }
 
   const bodyText = await response.text();
diff --git a/plugins/xgrids-k1/frontend/src/compatibility.ts b/plugins/xgrids-k1/frontend/src/compatibility.ts
index 54b1c8c..e7ccda0 100644
--- a/plugins/xgrids-k1/frontend/src/compatibility.ts
+++ b/plugins/xgrids-k1/frontend/src/compatibility.ts
@@ -1,7 +1,7 @@
 import type { CompatibilityAttestation } from "./api";
 
-export const EXACT_PROFILE_ATTESTATION: CompatibilityAttestation = Object.freeze({
+export const EXACT_PROFILE_SELECTION: CompatibilityAttestation = Object.freeze({
   firmware_version: "3.0.2",
   topology: "direct-lan",
-  operator_confirmed: true,
+  verification: "live-device-info",
 });
diff --git a/plugins/xgrids-k1/frontend/src/components/K1AcquisitionPipeline.tsx b/plugins/xgrids-k1/frontend/src/components/K1AcquisitionPipeline.tsx
index 8d91d2d..2c1bd4f 100644
--- a/plugins/xgrids-k1/frontend/src/components/K1AcquisitionPipeline.tsx
+++ b/plugins/xgrids-k1/frontend/src/components/K1AcquisitionPipeline.tsx
@@ -4,13 +4,22 @@ import {
   Checker,
   GlassSurface,
   Icon,
+  Select,
   SegmentedControl,
   StatusBadge,
   TextField,
   type StatusTone,
 } from "@nodedc/ui-react";
 
-import { EXACT_PROFILE_ATTESTATION } from "../compatibility";
+import { EXACT_PROFILE_SELECTION } from "../compatibility";
+import {
+  SUPPORTED_GNSS_MODE,
+  SUPPORTED_MOUNT_TYPE,
+  gnssModeOptions,
+  mountTypeOptions,
+  type GnssMode,
+  type MountType,
+} from "../configuration";
 import { runAutomaticSpatialSourceStart } from "../automaticSourceStart";
 import {
   isConfirmedLiveState,
@@ -41,12 +50,10 @@ const PHYSICAL_ACCEPTANCE = {
 
 export function K1AcquisitionPipeline({
   controller,
-  profileConfirmed,
   openSpatialScene,
   activateAutomaticSpatialSource,
 }: {
   controller: XgridsK1Controller;
-  profileConfirmed: boolean;
   openSpatialScene: () => void;
   activateAutomaticSpatialSource: () => void;
 }) {
@@ -57,7 +64,6 @@ export function K1AcquisitionPipeline({
     startCanonicalAcquisition,
     startReplay,
     stop,
-    confirmStoppedAtSteadyGreen,
     abort,
   } = controller;
   const [sessionIntent, setSessionIntent] = useState<SessionIntent>("live");
@@ -66,7 +72,8 @@ export function K1AcquisitionPipeline({
   const [replayPath, setReplayPath] = useState("");
   const [replaySpeed, setReplaySpeed] = useState("1");
   const [replayLoop, setReplayLoop] = useState(false);
-  const [physicalAcceptanceConfirmed, setPhysicalAcceptanceConfirmed] = useState(false);
+  const [mountType, setMountType] = useState<MountType>(SUPPORTED_MOUNT_TYPE);
+  const [gnssMode, setGnssMode] = useState<GnssMode>(SUPPORTED_GNSS_MODE);
   const hydratedAcquisitionId = useRef<string | null>(null);
 
   const activeAcquisition = recoverableAcquisition(state);
@@ -125,8 +132,6 @@ export function K1AcquisitionPipeline({
   const startLive = async () => {
     setProjectNameTouched(true);
     if (
-      !profileConfirmed ||
-      !physicalAcceptanceConfirmed ||
       !state?.k1_ip ||
       sourceRuntimeBusy ||
       launchBlockedByAcquisition ||
@@ -142,7 +147,9 @@ export function K1AcquisitionPipeline({
         },
         acquisition: {
           project_name: projectNameValidation.value,
-          compatibility_attestation: EXACT_PROFILE_ATTESTATION,
+          mount_type: SUPPORTED_MOUNT_TYPE,
+          gnss_mode: SUPPORTED_GNSS_MODE,
+          compatibility_attestation: EXACT_PROFILE_SELECTION,
         },
         physicalAcceptance: PHYSICAL_ACCEPTANCE,
       }),
@@ -181,6 +188,30 @@ export function K1AcquisitionPipeline({
       />
       {effectiveSessionIntent === "live" ? (
         <div className="session-form">
+          <div className="scan-configuration-grid">
+            <div className="configuration-field">
+              <span className="nodedc-field__description">Тип установки / носитель</span>
+              <Select
+                label="Тип установки / носитель"
+                value={mountType}
+                options={mountTypeOptions}
+                onChange={setMountType}
+                disabled={isBusy || sessionLocked}
+                variant="split"
+              />
+            </div>
+            <div className="configuration-field">
+              <span className="nodedc-field__description">Режим GNSS</span>
+              <Select
+                label="Режим GNSS"
+                value={gnssMode}
+                options={gnssModeOptions}
+                onChange={setGnssMode}
+                disabled={isBusy || sessionLocked}
+                variant="split"
+              />
+            </div>
+          </div>
           <TextField
             label="Название проекта"
             hint="Имя войдёт в единственный канонический START"
@@ -198,19 +229,12 @@ export function K1AcquisitionPipeline({
               : "Отдельной команды сохранения имени на K1 нет: оно отправляется только при START."}
             placeholder="Например, TEST001"
           />
-          <Checker
-            checked={physicalAcceptanceConfirmed}
-            label="Я рядом с выбранным K1; LixelGO закрыт; питание и место для записи проверены; индикатор постоянно зелёный"
-            onChange={setPhysicalAcceptanceConfirmed}
-          />
           <Button
             variant="primary"
             icon={<Icon name="activity" />}
             disabled={
               isBusy ||
-              !profileConfirmed ||
               !state?.k1_ip ||
-              !physicalAcceptanceConfirmed ||
               projectNameValidation.error !== null ||
               sourceRuntimeBusy ||
               launchBlockedByAcquisition ||
@@ -232,6 +256,9 @@ export function K1AcquisitionPipeline({
                 ? "Продолжить запуск сканирования и приёма"
                 : "Запустить сканирование и локальный приём"}
           </Button>
+          <p className="start-confirmation-note">
+            Нажатие запуска — явное операторское действие для выбранного K1. Автоматических повторов START нет.
+          </p>
           {control?.control_socket_open && !activeAcquisition && !isBusy ? (
             <Button
               variant="ghost"
@@ -242,9 +269,7 @@ export function K1AcquisitionPipeline({
             </Button>
           ) : null}
           <p className="live-instruction">
-            {!profileConfirmed
-              ? "Сначала вручную подтвердите FW 3.0.2 и direct-LAN. Интерфейс не аттестует устройство автоматически."
-              : controlPhase === "failed"
+            {controlPhase === "failed"
                 ? `Диалог остановлен без автоповтора: ${control?.failure?.message || "требуется ручная проверка K1"}`
                 : controlPhase === "connecting"
                   ? "Выполняются операции 1–6 записанного диалога; следующий этап ждёт подтверждённый ответ K1."
@@ -256,7 +281,7 @@ export function K1AcquisitionPipeline({
                         ? "Калибровка оборудования. Не перемещайте K1; временных переходов и повторных команд нет."
                         : controlPhase === "scanning"
                           ? "K1 подтвердил SCANNING и инициализацию. Остановка доступна в пространственной сцене."
-                          : "Одна кнопка выражает намерение запустить сканирование. Внутри этапы идут строго по записанному порядку и только после ответов K1; человеческие паузы из capture не воспроизводятся."}
+                          : "Одна кнопка выражает намерение запустить сканирование. Совместимость подтверждается живым DeviceInfo; этапы идут строго по записанному порядку и только после ответов K1."}
           </p>
         </div>
       ) : (
@@ -282,15 +307,6 @@ export function K1AcquisitionPipeline({
                 : "Остановка завершает только локальный приём и сохранение. Физическое состояние сканера остаётся неизвестным."
               : "Активного источника сейчас нет."}
         </p>
-        {control?.can_confirm_standby ? (
-          <Button
-            variant="primary"
-            disabled={isBusy}
-            onClick={() => void confirmStoppedAtSteadyGreen()}
-          >
-            Индикатор постоянно зелёный — завершить запись
-          </Button>
-        ) : null}
         <Button
           variant="secondary"
           disabled={isBusy || (!sourceRuntimeBusy && preparedAcquisition !== null) || (!sourceRuntimeBusy && activeAcquisition === null)}
diff --git a/plugins/xgrids-k1/frontend/src/components/K1ProvisioningPipeline.tsx b/plugins/xgrids-k1/frontend/src/components/K1ProvisioningPipeline.tsx
index cd51bdd..e8145c1 100644
--- a/plugins/xgrids-k1/frontend/src/components/K1ProvisioningPipeline.tsx
+++ b/plugins/xgrids-k1/frontend/src/components/K1ProvisioningPipeline.tsx
@@ -4,13 +4,19 @@ import {
   Checker,
   GlassSurface,
   Icon,
+  Select,
   StatusBadge,
   TextField,
   type StatusTone,
 } from "@nodedc/ui-react";
 
 import type { BleDevice } from "../api";
-import { EXACT_PROFILE_ATTESTATION } from "../compatibility";
+import { EXACT_PROFILE_SELECTION } from "../compatibility";
+import {
+  SUPPORTED_CONNECTION_MODE,
+  connectionModeOptions,
+  type ConnectionMode,
+} from "../configuration";
 import { provisioningIntentKey } from "../lifecycle";
 import { finiteMetric } from "../presentation";
 import type { XgridsK1Controller } from "../runtimeContext";
@@ -79,30 +85,28 @@ export function K1ProvisioningPipeline({
   controller,
   phaseLabel,
   phaseTone,
-  profileConfirmed,
-  onProfileConfirmedChange,
 }: {
   controller: XgridsK1Controller;
   phaseLabel: string;
   phaseTone: StatusTone;
-  profileConfirmed: boolean;
-  onProfileConfirmedChange: (confirmed: boolean) => void;
 }) {
   const { state, pendingAction, scan, connect } = controller;
   const [powerConfirmed, setPowerConfirmed] = useState(false);
   const [selectedDeviceId, setSelectedDeviceId] = useState("");
   const [ssid, setSsid] = useState("");
   const [password, setPassword] = useState("");
+  const [connectionMode, setConnectionMode] = useState<ConnectionMode>(
+    SUPPORTED_CONNECTION_MODE,
+  );
   const provisioningIntentRef = useRef<string | null>(null);
   const devices = state?.devices ?? [];
   const isBusy = pendingAction !== null;
   const credentialsReady = ssid.trim().length > 0 && password.length > 0;
-  const canConnect = powerConfirmed && profileConfirmed && selectedDeviceId.length > 0 && credentialsReady && !isBusy;
+  const canConnect = powerConfirmed && selectedDeviceId.length > 0 && credentialsReady && !isBusy;
 
   useEffect(() => {
     if (state?.selected_device_id) {
       if (state.selected_device_id !== selectedDeviceId) {
-        onProfileConfirmedChange(false);
         provisioningIntentRef.current = null;
       }
       setSelectedDeviceId(state.selected_device_id);
@@ -111,15 +115,14 @@ export function K1ProvisioningPipeline({
     if (selectedDeviceId && state?.devices && !state.devices.some((device) => device.device_id === selectedDeviceId)) {
       setSelectedDeviceId("");
     }
-  }, [onProfileConfirmedChange, selectedDeviceId, state?.devices, state?.selected_device_id]);
+  }, [selectedDeviceId, state?.devices, state?.selected_device_id]);
 
   const deviceSummary = useMemo(
     () => devices.find((device) => device.device_id === selectedDeviceId),
     [devices, selectedDeviceId],
   );
 
-  const resetProfile = () => {
-    onProfileConfirmedChange(false);
+  const resetProvisioningIntent = () => {
     provisioningIntentRef.current = null;
   };
 
@@ -131,7 +134,8 @@ export function K1ProvisioningPipeline({
       device_id: selectedDeviceId,
       ssid: ssid.trim(),
       password,
-      compatibility_attestation: EXACT_PROFILE_ATTESTATION,
+      connection_mode: SUPPORTED_CONNECTION_MODE,
+      compatibility_attestation: EXACT_PROFILE_SELECTION,
       idempotency_key: idempotencyKey,
     });
     if (succeeded) {
@@ -146,6 +150,22 @@ export function K1ProvisioningPipeline({
         <div><span className="section-eyebrow">ПОДКЛЮЧЕНИЕ · ШАГИ 01–03</span><h2>Подключите устройство к сети</h2></div>
         <StatusBadge tone={phaseTone}>{phaseLabel}</StatusBadge>
       </header>
+      <div className="configuration-anchor">
+        <span className="nodedc-field__description">
+          Неподтверждённые сетевые топологии уже отражены в интерфейсе, но не могут быть выбраны до отдельной приёмки.
+        </span>
+        <Select
+          label="Способ подключения"
+          value={connectionMode}
+          options={connectionModeOptions}
+          onChange={(value) => {
+            setConnectionMode(value);
+            resetProvisioningIntent();
+          }}
+          disabled={isBusy}
+          variant="split"
+        />
+      </div>
       <div className="wizard-list">
         <WizardStep number="01" title="Включите устройство" status={powerConfirmed ? "Подтверждено" : "Ожидает"} tone={powerConfirmed ? "success" : "warning"}>
           <div className="nodedc-field">
@@ -153,7 +173,7 @@ export function K1ProvisioningPipeline({
             <Checker
               checked={powerConfirmed}
               label="Устройство включено, индикатор стабилен"
-              onChange={(checked) => { setPowerConfirmed(checked); if (!checked) resetProfile(); }}
+              onChange={(checked) => { setPowerConfirmed(checked); if (!checked) resetProvisioningIntent(); }}
             />
           </div>
         </WizardStep>
@@ -163,13 +183,13 @@ export function K1ProvisioningPipeline({
           status={pendingAction === "scan" ? "Поиск…" : selectedDeviceId ? "Устройство выбрано" : `Найдено: ${devices.length}`}
           tone={pendingAction === "scan" ? "accent" : selectedDeviceId ? "success" : "neutral"}
         >
-          <p className="step-copy">Поиск занимает 6 секунд и показывает все видимые BLE-устройства. Метка кандидата основана только на имени; модель и прошивку подтверждает оператор.</p>
+          <p className="step-copy">Поиск занимает 6 секунд и показывает все видимые BLE-устройства. Метка кандидата основана только на имени; точные модель, platform type и прошивка будут проверены по живому DeviceInfo перед START.</p>
           <Button
             width="full"
             variant="secondary"
             icon={<Icon name="search" />}
             disabled={!powerConfirmed || isBusy}
-            onClick={() => { setSelectedDeviceId(""); resetProfile(); void scan(); }}
+            onClick={() => { setSelectedDeviceId(""); resetProvisioningIntent(); void scan(); }}
           >
             {pendingAction === "scan" ? "Сканируем Bluetooth — 6 секунд…" : "Показать все BLE-устройства"}
           </Button>
@@ -179,21 +199,18 @@ export function K1ProvisioningPipeline({
                 key={device.device_id}
                 device={device}
                 selected={device.device_id === selectedDeviceId}
-                onSelect={() => { setSelectedDeviceId(device.device_id); resetProfile(); }}
+                onSelect={() => { setSelectedDeviceId(device.device_id); resetProvisioningIntent(); }}
               />
             )) : <div className="empty-device-list">Устройства пока не найдены. Проверьте питание и повторите поиск.</div>}
           </div>
         </WizardStep>
-        <WizardStep number="03" title="Передайте настройки Wi‑Fi" status={state?.k1_ip ? "Подключено" : "Не подключено"} tone={state?.k1_ip ? "success" : "neutral"}>
+        <WizardStep
+          number="03"
+          title="Передайте настройки общей сети"
+          status={state?.k1_ip ? "Адрес ранее получен" : "Настройки не переданы"}
+          tone={state?.k1_ip ? "warning" : "neutral"}
+        >
           <div className="field-stack">
-            <div className="nodedc-field">
-              <span className="nodedc-field__description">Mission Core не определяет прошивку автоматически. Подтвердите только точное соответствие профилю.</span>
-              <Checker
-                checked={profileConfirmed}
-                label="Я вручную подтвердил FW 3.0.2 и direct-LAN"
-                onChange={(checked) => { onProfileConfirmedChange(checked); provisioningIntentRef.current = null; }}
-              />
-            </div>
             <TextField label="Название сети Wi‑Fi" hint="SSID" value={ssid} onChange={(event) => { setSsid(event.target.value); provisioningIntentRef.current = null; }} autoComplete="off" spellCheck={false} placeholder="Сеть локального контура" />
             <TextField label="Пароль Wi‑Fi" hint="Только в оперативной памяти" type="password" value={password} onChange={(event) => { setPassword(event.target.value); provisioningIntentRef.current = null; }} autoComplete="off" placeholder="Введите пароль" />
           </div>
@@ -201,7 +218,7 @@ export function K1ProvisioningPipeline({
           <Button width="full" variant="primary" icon={<Icon name="network" />} disabled={!canConnect} onClick={() => void submitConnect()}>
             {pendingAction === "connect" ? "Подключаем…" : "Подключить устройство к Wi‑Fi"}
           </Button>
-          <p className="safety-note">Пароль передаётся только локальному сервису, не сохраняется в браузере и удаляется из формы после успеха.</p>
+          <p className="safety-note">Наличие адреса подтверждает результат предыдущей настройки, но не текущее соединение. Пароль передаётся только локальному сервису, не сохраняется в браузере и удаляется из формы после успеха.</p>
         </WizardStep>
       </div>
     </GlassSurface>
diff --git a/plugins/xgrids-k1/frontend/src/components/K1SpatialControls.tsx b/plugins/xgrids-k1/frontend/src/components/K1SpatialControls.tsx
index 379a29d..cbb9d93 100644
--- a/plugins/xgrids-k1/frontend/src/components/K1SpatialControls.tsx
+++ b/plugins/xgrids-k1/frontend/src/components/K1SpatialControls.tsx
@@ -72,7 +72,7 @@ function phasePresentation(
     awaiting_external_stop: {
       label: softwareCommanded ? "K1 завершает и сохраняет" : "Ожидание остановки на устройстве",
       detail: softwareCommanded
-        ? "STOP не повторяется. Дождитесь READY и постоянного зелёного индикатора."
+        ? "STOP не повторяется. Mission Core завершит запись после READY от K1."
         : "Mission Core ждёт подтверждения физической остановки K1.",
       busy: true,
     },
@@ -108,7 +108,7 @@ function formatDuration(seconds: number): string {
 
 export function K1SpatialControls(_props: DevicePluginConnectionProps) {
   const controller = useXgridsK1Controller();
-  const { state, pendingAction, stop, confirmStoppedAtSteadyGreen } = controller;
+  const { state, pendingAction, stop } = controller;
   const acquisition = state?.acquisition;
   const cleanupPending = acquisition?.cleanup_pending === true;
   if (!acquisition || !shouldRenderSpatialControls(state)) {
@@ -179,16 +179,6 @@ export function K1SpatialControls(_props: DevicePluginConnectionProps) {
               ? "Повторить остановку"
               : softwareCommanded ? "Остановить устройство и запись" : "Остановить локальный приём"}
       </Button>
-      {state?.application_control_session?.can_confirm_standby ? (
-        <Button
-          size="compact"
-          variant="primary"
-          disabled={pendingAction !== null}
-          onClick={() => void confirmStoppedAtSteadyGreen()}
-        >
-          Индикатор постоянно зелёный — завершить запись
-        </Button>
-      ) : null}
     </section>
   );
 }
diff --git a/plugins/xgrids-k1/frontend/src/configuration.ts b/plugins/xgrids-k1/frontend/src/configuration.ts
new file mode 100644
index 0000000..39525ef
--- /dev/null
+++ b/plugins/xgrids-k1/frontend/src/configuration.ts
@@ -0,0 +1,75 @@
+import type { SelectOption } from "@nodedc/ui-react";
+
+export type ConnectionMode = "bridge" | "quick-connect" | "direct-connect";
+export type MountType = "handheld" | "vehicle-mounted" | "uav" | "backpack";
+export type GnssMode = "none" | "rtk" | "ppk";
+
+export const SUPPORTED_CONNECTION_MODE = "bridge" as const satisfies ConnectionMode;
+export const SUPPORTED_MOUNT_TYPE = "handheld" as const satisfies MountType;
+export const SUPPORTED_GNSS_MODE = "none" as const satisfies GnssMode;
+
+export const connectionModeOptions: Array<SelectOption<ConnectionMode>> = [
+  {
+    value: "bridge",
+    label: "Общая сеть · Bridge",
+    description: "K1 и Mission Core работают в одной локальной сети. Подтверждённый путь.",
+  },
+  {
+    value: "quick-connect",
+    label: "Точка доступа K1 · Quick Connect",
+    description: "Mission Core подключается к сети сканера. Будет доступно после отдельной приёмки.",
+    disabled: true,
+  },
+  {
+    value: "direct-connect",
+    label: "Хотспот контроллера · Direct Connect",
+    description: "K1 подключается к сети управляющего устройства. Будет доступно после отдельной приёмки.",
+    disabled: true,
+  },
+];
+
+export const mountTypeOptions: Array<SelectOption<MountType>> = [
+  {
+    value: "handheld",
+    label: "Ручной",
+    description: "Подтверждённый канонический профиль MountType.HANDHELD.",
+  },
+  {
+    value: "vehicle-mounted",
+    label: "На наземной платформе",
+    description: "Vehicle-Mounted. Недоступно до отдельной приёмки START/STOP.",
+    disabled: true,
+  },
+  {
+    value: "uav",
+    label: "На БПЛА",
+    description: "Drone/UAV. Недоступно до отдельной приёмки START/STOP.",
+    disabled: true,
+  },
+  {
+    value: "backpack",
+    label: "Ранцевый",
+    description: "Backpack. Недоступно до отдельной приёмки START/STOP.",
+    disabled: true,
+  },
+];
+
+export const gnssModeOptions: Array<SelectOption<GnssMode>> = [
+  {
+    value: "none",
+    label: "Без RTK",
+    description: "RTK/NTRIP читаются только для обнаружения возможностей и не включаются.",
+  },
+  {
+    value: "rtk",
+    label: "Использовать RTK",
+    description: "Недоступно до отдельного захвата настройки и физической приёмки.",
+    disabled: true,
+  },
+  {
+    value: "ppk",
+    label: "Использовать PPK",
+    description: "Недоступно до отдельного захвата настройки и физической приёмки.",
+    disabled: true,
+  },
+];
diff --git a/plugins/xgrids-k1/frontend/src/lifecycle.ts b/plugins/xgrids-k1/frontend/src/lifecycle.ts
index 163bb21..e4647f8 100644
--- a/plugins/xgrids-k1/frontend/src/lifecycle.ts
+++ b/plugins/xgrids-k1/frontend/src/lifecycle.ts
@@ -2,6 +2,7 @@ import type { RuntimePhase, SourceMode as RuntimeSourceMode } from "@mission-cor
 
 import type {
   AcquisitionState,
+  XgridsApplicationControlPhase,
   XgridsAcquisition,
   XgridsK1State,
   XgridsOperation,
@@ -22,6 +23,25 @@ const FAILED_OPERATION_STATUSES = new Set([
 ]);
 
 export type LiveStartPlan = "prepare" | "resume-prepared" | "already-running" | "blocked";
+export type ControlSessionEntryPlan =
+  | "open"
+  | "continue"
+  | "failed"
+  | "duplicate-open";
+
+export function controlSessionEntryPlan(
+  phase: XgridsApplicationControlPhase,
+  openedByCurrentOperatorAction: boolean,
+  canOpen: boolean,
+): ControlSessionEntryPlan {
+  if (phase === "failed") {
+    return !openedByCurrentOperatorAction && canOpen ? "open" : "failed";
+  }
+  if (["idle", "closed", "completed"].includes(phase)) {
+    return openedByCurrentOperatorAction ? "duplicate-open" : "open";
+  }
+  return "continue";
+}
 
 export function isTerminalAcquisitionState(
   state: AcquisitionState | null | undefined,
@@ -119,7 +139,12 @@ export function normalizeRuntimePhase(
   }
   if (acquisitionState === "prepared") return "connected";
   if (phase === "error") return "error";
-  if (phase === "connected") return "connected";
+  if (phase === "connected") {
+    const controlPhase = state?.application_control_session?.state;
+    return controlPhase && !["idle", "connecting", "closed", "completed", "failed"].includes(controlPhase)
+      ? "connected"
+      : "configuring";
+  }
   if (phase === "starting_live") return "starting";
   if (phase === "live") return "streaming";
   if (phase === "replay") return "replaying";
diff --git a/plugins/xgrids-k1/frontend/src/messages.ts b/plugins/xgrids-k1/frontend/src/messages.ts
index 5a1d4cb..0cf447e 100644
--- a/plugins/xgrids-k1/frontend/src/messages.ts
+++ b/plugins/xgrids-k1/frontend/src/messages.ts
@@ -1,5 +1,45 @@
 // Vendor message normalization belongs to the XGRIDS frontend contribution.
 const runtimeMessageReplacements: Array<[RegExp, string]> = [
+  [
+    /^control MQTT connect call failed(?::.*)?$/gi,
+    "Управляющее соединение со сканером не открылось: устройство не приняло MQTT-соединение. Команды сканирования не отправлялись.",
+  ],
+  [
+    /macOS Keychain authority is unavailable/gi,
+    "Локальный допуск управления K1 не подготовлен. Команды сканеру не отправлялись.",
+  ],
+  [
+    /macOS Keychain authority lookup failed/gi,
+    "Локальный допуск управления K1 недоступен. Команды сканеру не отправлялись.",
+  ],
+  [
+    /control MQTT connect call failed/gi,
+    "Управляющее соединение с K1 не открылось. Команды сканеру не отправлялись.",
+  ],
+  [
+    /^Device plugin returned an invalid non-JSON action result$/gi,
+    "Плагин устройства сформировал некорректное внутреннее состояние. Запрос к K1 не повторялся.",
+  ],
+  [
+    /^bootstrap response correlation failed.*$/gi,
+    "Ответ K1 на подготовительном этапе не совпал с ожидаемой операцией. Диалог остановлен без автоматического повтора.",
+  ],
+  [
+    /^live DeviceInfo is incompatible with the selected.*$/gi,
+    "Устройство ответило, но его живые данные не соответствуют выбранному профилю совместимости. START и STOP не отправлялись.",
+  ],
+  [
+    /^K1 did not confirm bound SCANNING initialization.*$/gi,
+    "После START устройство не подтвердило завершение инициализации в безопасный срок. Автоматический STOP не отправлялся.",
+  ],
+  [
+    /^stale control response makes the next command outcome ambiguous$/gi,
+    "Получен запоздавший ответ предыдущего этапа. Диалог остановлен, следующая команда не отправлялась.",
+  ],
+  [
+    /control MQTT connection\/subscription timed out/gi,
+    "Управляющее соединение с K1 не подтвердилось вовремя. Команды сканеру не отправлялись.",
+  ],
   [/broker connection ended/gi, "соединение с брокером завершено"],
   [/Unspecified error/gi, "неуказанная ошибка"],
   [
diff --git a/plugins/xgrids-k1/frontend/src/operatorIntentGeneration.ts b/plugins/xgrids-k1/frontend/src/operatorIntentGeneration.ts
new file mode 100644
index 0000000..d80cf19
--- /dev/null
+++ b/plugins/xgrids-k1/frontend/src/operatorIntentGeneration.ts
@@ -0,0 +1,67 @@
+export interface RuntimeGenerationToken {
+  readonly runtimeGeneration: number;
+}
+
+export interface OperatorIntentToken extends RuntimeGenerationToken {
+  readonly intentGeneration: number;
+}
+
+/**
+ * Invalidates asynchronous UI work across both plugin activation changes and
+ * successive explicit operator intents.
+ *
+ * A boolean "mounted" flag is insufficient here: an operation started before
+ * active=true -> false -> true would otherwise observe true again and resume.
+ */
+export class OperatorIntentGeneration {
+  private runtimeGeneration = 0;
+  private intentGeneration = 0;
+  private active = false;
+
+  activateRuntime(): RuntimeGenerationToken {
+    this.runtimeGeneration += 1;
+    this.active = true;
+    return Object.freeze({ runtimeGeneration: this.runtimeGeneration });
+  }
+
+  deactivateRuntime(): void {
+    if (!this.active) return;
+    this.runtimeGeneration += 1;
+    this.active = false;
+  }
+
+  captureRuntime(): RuntimeGenerationToken | null {
+    if (!this.active) return null;
+    return Object.freeze({ runtimeGeneration: this.runtimeGeneration });
+  }
+
+  beginOperatorIntent(): OperatorIntentToken | null {
+    if (!this.active) return null;
+    this.intentGeneration += 1;
+    return Object.freeze({
+      runtimeGeneration: this.runtimeGeneration,
+      intentGeneration: this.intentGeneration,
+    });
+  }
+
+  isRuntimeCurrent(token: RuntimeGenerationToken): boolean {
+    return this.active && token.runtimeGeneration === this.runtimeGeneration;
+  }
+
+  isOperatorIntentCurrent(token: OperatorIntentToken): boolean {
+    return (
+      this.isRuntimeCurrent(token)
+      && token.intentGeneration === this.intentGeneration
+    );
+  }
+}
+
+export async function awaitWhileIntentCurrent<T>(
+  assertCurrent: () => void,
+  operation: () => Promise<T>,
+): Promise<T> {
+  assertCurrent();
+  const result = await operation();
+  assertCurrent();
+  return result;
+}
diff --git a/plugins/xgrids-k1/frontend/src/presentation.ts b/plugins/xgrids-k1/frontend/src/presentation.ts
index a16b495..7611d2f 100644
--- a/plugins/xgrids-k1/frontend/src/presentation.ts
+++ b/plugins/xgrids-k1/frontend/src/presentation.ts
@@ -9,7 +9,7 @@ const phaseLabels: Record<string, string> = {
   device_selected: "Устройство выбрано",
   provisioning: "Передача настроек Wi‑Fi",
   connecting: "Подключение",
-  connected: "Устройство подключено",
+  connected: "Сетевой адрес устройства получен",
   starting_live: "Запуск потока",
   live: "Поток в реальном времени",
   replay: "Повтор записи",
@@ -25,7 +25,8 @@ export function phaseLabel(phase: string | null | undefined): string {
 export function phaseTone(phase: string | null | undefined): StatusTone {
   if (!phase) return "neutral";
   if (phase === "error") return "danger";
-  if (["connected", "live", "replay"].includes(phase)) return "success";
+  if (["live", "replay"].includes(phase)) return "success";
+  if (phase === "connected") return "warning";
   if (["scanning", "provisioning", "connecting", "starting_live", "stopping"].includes(phase)) return "accent";
   return "neutral";
 }
diff --git a/plugins/xgrids-k1/frontend/src/styles.css b/plugins/xgrids-k1/frontend/src/styles.css
index a8e2c6a..b23944d 100644
--- a/plugins/xgrids-k1/frontend/src/styles.css
+++ b/plugins/xgrids-k1/frontend/src/styles.css
@@ -69,6 +69,20 @@
   margin-top: 1.4rem;
 }
 
+.configuration-anchor {
+  display: grid;
+  gap: 0.55rem;
+  margin-top: 1.2rem;
+  border-radius: 0.95rem;
+  background: rgb(255 255 255 / 0.028);
+  padding: 0.8rem;
+}
+
+.configuration-anchor .nodedc-select-anchor,
+.configuration-field .nodedc-select-anchor {
+  width: 100%;
+}
+
 .wizard-step {
   display: grid;
   grid-template-columns: 2.2rem minmax(0, 1fr);
@@ -282,6 +296,25 @@
   margin-top: 1rem;
 }
 
+.scan-configuration-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 0.75rem;
+}
+
+.configuration-field {
+  display: grid;
+  min-width: 0;
+  gap: 0.45rem;
+}
+
+.start-confirmation-note {
+  margin: -0.25rem 0 0;
+  color: var(--nodedc-text-muted);
+  font-size: 0.6rem;
+  line-height: 1.45;
+}
+
 .session-form--replay {
   grid-template-columns: minmax(0, 1.55fr) minmax(8rem, 0.45fr);
 }
@@ -435,6 +468,10 @@
 }
 
 @media (max-width: 760px) {
+  .xgrids-k1-plugin .scan-configuration-grid {
+    grid-template-columns: 1fr;
+  }
+
   .xgrids-k1-plugin .session-form--replay {
     grid-template-columns: 1fr;
   }
diff --git a/plugins/xgrids-k1/frontend/src/useXgridsK1Runtime.ts b/plugins/xgrids-k1/frontend/src/useXgridsK1Runtime.ts
index e1592cb..ece7562 100644
--- a/plugins/xgrids-k1/frontend/src/useXgridsK1Runtime.ts
+++ b/plugins/xgrids-k1/frontend/src/useXgridsK1Runtime.ts
@@ -16,6 +16,7 @@ import {
   type XgridsK1State,
 } from "./api";
 import {
+  controlSessionEntryPlan,
   isTerminalAcquisitionState,
   liveStartPlan,
   operationByIdempotencyKey,
@@ -23,6 +24,10 @@ import {
   isSoftwareCommandedAcquisition,
 } from "./lifecycle";
 import { localizeRuntimeMessage } from "./messages";
+import {
+  awaitWhileIntentCurrent,
+  OperatorIntentGeneration,
+} from "./operatorIntentGeneration";
 import { selectMonotonicXgridsState } from "./stateOrdering";
 
 export type PendingAction =
@@ -50,19 +55,103 @@ function controlPhase(state: XgridsK1State): XgridsApplicationControlPhase {
 
 function controlFailure(state: XgridsK1State): ApiError {
   const failure = state.application_control_session?.failure;
+  const localizedDetail = localizeRuntimeMessage(failure?.message);
+  const reasonLabels: Record<string, string> = {
+    application_authority_unavailable:
+      "Локальный допуск управления устройством недоступен; команды не отправлялись.",
+    mqtt_connect_call_failed:
+      "Управляющее MQTT-соединение со сканером не открылось.",
+    mqtt_connect_rejected:
+      "Сканер отклонил управляющее MQTT-соединение.",
+    mqtt_connection_timeout:
+      "Подключение или подписки MQTT не подтвердились вовремя.",
+    mqtt_subscription_failed:
+      "Сканер не подтвердил канонические MQTT-подписки.",
+    mqtt_response_timeout:
+      "Ожидаемый ответ сканера не пришёл до безопасной границы ожидания.",
+    response_identity_decode_failed:
+      "Ответ сканера не удалось безопасно разобрать и привязать к операции.",
+    modeling_response_decode_failed:
+      "Ответ START/STOP не удалось безопасно разобрать.",
+    duplicate_application_response:
+      "Сканер прислал повторный ответ на уже завершённую операцию.",
+    unexpected_response_identity:
+      "Получен ответ неизвестной операции; диалог остановлен.",
+    response_identity_mismatch:
+      "Идентичность ответа не совпала с ожидаемой операцией.",
+    response_session_mismatch:
+      "Session ответа не совпал с точной подготовительной операцией.",
+    response_device_identity_mismatch:
+      "Ответ относится не к тому экземпляру устройства.",
+    response_authority_mismatch:
+      "Ответ не совпал с локальным допуском приложения.",
+    response_rejected:
+      "Сканер отклонил подготовительную операцию.",
+    compatibility_profile_mismatch:
+      "Живой DeviceInfo не соответствует выбранному профилю модели, platform type, прошивки или активации.",
+    scan_initialization_timeout:
+      "После подтверждённого START сканер не завершил инициализацию в безопасный срок.",
+    operation_reuse_forbidden:
+      "Повтор уже использованной операции заблокирован.",
+  };
+  const reasonDetail = failure?.reason_code
+    ? reasonLabels[failure.reason_code]
+    : undefined;
+  const stageLabels: Record<string, string> = {
+    connecting: "подключение и первичный диалог",
+    connection: "первичный диалог",
+    "connection-ready": "подключение подтверждено",
+    "workspace-requested": "вход в рабочую область",
+    "workspace-ready": "рабочая область готова",
+    "project-requested": "подготовка проекта",
+    "project-ready": "проект готов",
+    "start-requested": "подтверждение запуска",
+    "start-attempted": "команда запуска",
+    initializing: "калибровка оборудования",
+    scanning: "сканирование",
+    "stop-requested": "подтверждение остановки",
+    "stop-attempted": "команда остановки",
+    stopping: "остановка",
+  };
+  const stageCode = failure?.dialogue_stage || failure?.failed_phase;
+  const stage = stageCode
+    ? stageLabels[stageCode] ?? "неопознанный этап канонического диалога"
+    : "этап не зафиксирован";
+  const commandStatus = failure?.modeling_command_attempted === true
+    ? "Команда START или STOP могла быть отправлена; автоматический повтор запрещён."
+    : failure?.modeling_command_attempted === false
+      ? "Команды START и STOP не отправлялись."
+      : "Факт отправки START или STOP диагностически не подтверждён; повтор запрещён.";
+  const retryStatus = failure?.safe_to_retry
+    ? "Новая попытка возможна только отдельным нажатием оператора."
+    : "Повтор заблокирован до ручной проверки состояния.";
+  const exchanges = typeof failure?.publish_attempts === "number"
+    ? `MQTT-публикаций до остановки: ${failure.publish_attempts}.`
+    : "Количество MQTT-публикаций не зафиксировано.";
+  const failedProtocolEvidence =
+    failure?.compatibility_failure ?? failure?.correlation_failure;
+  const failedOperation = failedProtocolEvidence?.operation_key
+    ? `Шаг протокола: ${failedProtocolEvidence.operation_key}.`
+    : "";
+  const diagnostics = failure?.diagnostic_evidence_unavailable?.length
+    ? "Часть диагностических доказательств недоступна; результат считается неизвестным."
+    : "";
   return new ApiError(
-    failure?.message
-      ? `Канонический диалог K1 остановлен: ${failure.message}`
-      : "Канонический диалог K1 остановлен до запуска сканирования.",
+    `${reasonDetail || localizedDetail || "Канонический диалог K1 остановлен."} Этап: ${stage}. ${failedOperation} ${exchanges} ${commandStatus} ${diagnostics} ${retryStatus}`,
   );
 }
 
 async function waitForControlPhase(
   expected: XgridsApplicationControlPhase,
   acceptState: (state: XgridsK1State) => void,
+  assertOperatorIntentCurrent: () => void,
 ): Promise<XgridsK1State> {
   for (;;) {
-    const nextState = await xgridsK1Api.getState();
+    assertOperatorIntentCurrent();
+    const nextState = await awaitWhileIntentCurrent(
+      assertOperatorIntentCurrent,
+      () => xgridsK1Api.getState(),
+    );
     acceptState(nextState);
     const phase = controlPhase(nextState);
     if (phase === expected) return nextState;
@@ -74,15 +163,22 @@ async function waitForControlPhase(
     }
     // This cadence only reads local server state. It never schedules, retries,
     // or times a K1 command; every next write remains gated by device response.
-    await new Promise<void>((resolve) => {
-      window.setTimeout(resolve, CONTROL_STATE_READ_INTERVAL_MS);
-    });
+    await awaitWhileIntentCurrent(
+      assertOperatorIntentCurrent,
+      () => new Promise<void>((resolve) => {
+        window.setTimeout(resolve, CONTROL_STATE_READ_INTERVAL_MS);
+      }),
+    );
   }
 }
 
 function messageFor(error: unknown): string {
   if (error instanceof ApiError) {
-    const message = localizeRuntimeMessage(error.message) ?? error.message;
+    // Domain errors are already written for the operator. Only HTTP details
+    // originate at the backend and need vendor/runtime normalization.
+    const message = error.status
+      ? localizeRuntimeMessage(error.message) ?? error.message
+      : error.message;
     return error.status
       ? `${message} (HTTP ${error.status})`
       : message;
@@ -113,8 +209,12 @@ export function useXgridsK1Runtime(enabled: boolean) {
   const [pendingAction, setPendingAction] = useState<PendingAction | null>(null);
   const [error, setError] = useState<string | null>(null);
   const [latencyHistory, setLatencyHistory] = useState<number[]>([]);
-  const mounted = useRef(true);
-  const actionInFlight = useRef(false);
+  const operatorIntents = useRef(new OperatorIntentGeneration());
+  const actionSequence = useRef(0);
+  const actionInFlight = useRef<{
+    runtimeGeneration: number;
+    actionSequence: number;
+  } | null>(null);
 
   const acceptState = useCallback((nextState: XgridsK1State) => {
     setState((currentState) => selectMonotonicXgridsState(currentState, nextState));
@@ -122,13 +222,14 @@ export function useXgridsK1Runtime(enabled: boolean) {
   }, []);
 
   const refresh = useCallback(async (reportErrors = true) => {
-    if (!enabled) return;
+    const runtimeToken = operatorIntents.current.captureRuntime();
+    if (!enabled || !runtimeToken) return;
     const [healthResult, stateResult] = await Promise.allSettled([
       xgridsK1Api.getHealth(),
       xgridsK1Api.getState(),
     ]);
 
-    if (!mounted.current) return;
+    if (!operatorIntents.current.isRuntimeCurrent(runtimeToken)) return;
 
     if (stateResult.status === "fulfilled") {
       acceptState(stateResult.value);
@@ -150,27 +251,48 @@ export function useXgridsK1Runtime(enabled: boolean) {
 
   const run = useCallback(
     async (action: PendingAction, operation: () => Promise<XgridsK1State>) => {
-      if (!enabled) return false;
-      if (actionInFlight.current) return false;
-      actionInFlight.current = true;
+      const runtimeToken = operatorIntents.current.captureRuntime();
+      if (!enabled || !runtimeToken) return false;
+      if (
+        actionInFlight.current?.runtimeGeneration
+        === runtimeToken.runtimeGeneration
+      ) return false;
+      actionSequence.current += 1;
+      const actionToken = {
+        runtimeGeneration: runtimeToken.runtimeGeneration,
+        actionSequence: actionSequence.current,
+      };
+      actionInFlight.current = actionToken;
       setPendingAction(action);
       setError(null);
 
       try {
+        if (!operatorIntents.current.isRuntimeCurrent(runtimeToken)) return false;
         const nextState = await operation();
-        if (mounted.current) acceptState(nextState);
+        if (!operatorIntents.current.isRuntimeCurrent(runtimeToken)) return false;
+        acceptState(nextState);
         return true;
       } catch (operationError) {
-        if (mounted.current) {
+        if (operatorIntents.current.isRuntimeCurrent(runtimeToken)) {
           setError(messageFor(operationError));
-          if (operationError instanceof ApiError && operationError.status === 0) {
+          if (
+            operationError instanceof ApiError
+            && operationError.transportUnavailable
+          ) {
             setBackendStatus("offline");
           }
         }
         return false;
       } finally {
-        actionInFlight.current = false;
-        if (mounted.current) setPendingAction(null);
+        if (
+          actionInFlight.current?.runtimeGeneration === actionToken.runtimeGeneration
+          && actionInFlight.current.actionSequence === actionToken.actionSequence
+        ) {
+          actionInFlight.current = null;
+          if (operatorIntents.current.isRuntimeCurrent(runtimeToken)) {
+            setPendingAction(null);
+          }
+        }
       }
     },
     [acceptState, enabled],
@@ -237,7 +359,24 @@ export function useXgridsK1Runtime(enabled: boolean) {
   const startCanonicalAcquisition = useCallback(
     (request: CanonicalLiveStartRequest) =>
       run("live", async () => {
-        let nextState = await xgridsK1Api.getState();
+        const intentToken = operatorIntents.current.beginOperatorIntent();
+        if (!intentToken) {
+          throw new ApiError(
+            "Экран управления закрыт; дальнейшие команды канонического диалога не отправлялись.",
+          );
+        }
+        const assertOperatorIntentCurrent = () => {
+          if (!operatorIntents.current.isOperatorIntentCurrent(intentToken)) {
+            throw new ApiError(
+              "Операторское действие завершено или заменено; дальнейшие команды канонического диалога не отправлялись.",
+            );
+          }
+        };
+        let nextState = await awaitWhileIntentCurrent(
+          assertOperatorIntentCurrent,
+          () => xgridsK1Api.getState(),
+        );
+        let openedControlSession = false;
         acceptState(nextState);
         const plan = liveStartPlan(nextState);
         if (plan === "blocked") {
@@ -246,50 +385,84 @@ export function useXgridsK1Runtime(enabled: boolean) {
         if (plan === "already-running") return nextState;
 
         for (;;) {
+          assertOperatorIntentCurrent();
           const phase = controlPhase(nextState);
           const acquisition = nextState.acquisition;
+          const entryPlan = controlSessionEntryPlan(
+            phase,
+            openedControlSession,
+            nextState.application_control_session?.can_open === true,
+          );
 
-          if (["idle", "closed", "completed"].includes(phase)) {
+          if (entryPlan === "failed") {
+            // A failed dialogue always ends this operator intent. Even when
+            // backend reconciliation says a fresh attempt may be safe, that
+            // attempt requires another explicit click.
+            throw controlFailure(nextState);
+          }
+
+          if (entryPlan === "duplicate-open") {
+            throw new ApiError(
+              "Управляющая сессия завершилась сразу после открытия. Автоматический повтор заблокирован; проверьте состояние и повторите только отдельным нажатием.",
+            );
+          }
+
+          if (entryPlan === "open") {
             if (acquisition && !isTerminalAcquisitionState(acquisition.state)) {
               throw new ApiError(
                 "Незавершённая подготовка не привязана к открытой control-сессии. Отмените её перед новым запуском.",
               );
             }
-            nextState = await xgridsK1Api.openApplicationControlSession(request.control);
-            acceptState(nextState);
-            continue;
-          }
-
-          if (phase === "failed") {
-            if (nextState.application_control_session?.can_open !== true) {
-              throw controlFailure(nextState);
-            }
-            nextState = await xgridsK1Api.openApplicationControlSession(request.control);
+            openedControlSession = true;
+            nextState = await awaitWhileIntentCurrent(
+              assertOperatorIntentCurrent,
+              () => xgridsK1Api.openApplicationControlSession(request.control),
+            );
             acceptState(nextState);
             continue;
           }
 
           if (phase === "connecting") {
-            nextState = await waitForControlPhase("connection-ready", acceptState);
+            nextState = await awaitWhileIntentCurrent(
+              assertOperatorIntentCurrent,
+              () => waitForControlPhase(
+                "connection-ready",
+                acceptState,
+                assertOperatorIntentCurrent,
+              ),
+            );
             continue;
           }
 
           if (phase === "connection-ready") {
-            nextState = await xgridsK1Api.enterApplicationWorkspace({
-              operator_confirmed: true,
-            });
+            nextState = await awaitWhileIntentCurrent(
+              assertOperatorIntentCurrent,
+              () => xgridsK1Api.enterApplicationWorkspace({
+                operator_confirmed: true,
+              }),
+            );
             acceptState(nextState);
             continue;
           }
 
           if (phase === "workspace-requested") {
-            nextState = await waitForControlPhase("workspace-ready", acceptState);
+            nextState = await awaitWhileIntentCurrent(
+              assertOperatorIntentCurrent,
+              () => waitForControlPhase(
+                "workspace-ready",
+                acceptState,
+                assertOperatorIntentCurrent,
+              ),
+            );
             continue;
           }
 
           if (phase === "workspace-ready") {
             if (!acquisition || isTerminalAcquisitionState(acquisition.state)) {
-              nextState = await xgridsK1Api.prepareAcquisition(request.acquisition);
+              nextState = await awaitWhileIntentCurrent(
+                assertOperatorIntentCurrent,
+                () => xgridsK1Api.prepareAcquisition(request.acquisition),
+              );
               acceptState(nextState);
               continue;
             }
@@ -298,12 +471,26 @@ export function useXgridsK1Runtime(enabled: boolean) {
                 "Текущая подготовка не принадлежит канонической control-сессии K1.",
               );
             }
-            nextState = await waitForControlPhase("project-ready", acceptState);
+            nextState = await awaitWhileIntentCurrent(
+              assertOperatorIntentCurrent,
+              () => waitForControlPhase(
+                "project-ready",
+                acceptState,
+                assertOperatorIntentCurrent,
+              ),
+            );
             continue;
           }
 
           if (phase === "project-requested") {
-            nextState = await waitForControlPhase("project-ready", acceptState);
+            nextState = await awaitWhileIntentCurrent(
+              assertOperatorIntentCurrent,
+              () => waitForControlPhase(
+                "project-ready",
+                acceptState,
+                assertOperatorIntentCurrent,
+              ),
+            );
             continue;
           }
 
@@ -311,11 +498,14 @@ export function useXgridsK1Runtime(enabled: boolean) {
             if (!acquisition || acquisition.state !== "prepared") {
               throw new ApiError("Локальный приём не подготовлен к каноническому START.");
             }
-            nextState = await xgridsK1Api.startAcquisition({
-              acquisition_id: acquisition.acquisition_id,
-              expected_state_revision: acquisition.state_revision,
-              physical_acceptance: request.physicalAcceptance,
-            });
+            nextState = await awaitWhileIntentCurrent(
+              assertOperatorIntentCurrent,
+              () => xgridsK1Api.startAcquisition({
+                acquisition_id: acquisition.acquisition_id,
+                expected_state_revision: acquisition.state_revision,
+                physical_acceptance: request.physicalAcceptance,
+              }),
+            );
             acceptState(nextState);
             return nextState;
           }
@@ -396,33 +586,6 @@ export function useXgridsK1Runtime(enabled: boolean) {
     [run, state],
   );
 
-  const confirmStoppedAtSteadyGreen = useCallback(
-    () =>
-      run("stop", () => {
-        const acquisition = state?.acquisition;
-        if (!acquisition || acquisition.state !== "awaiting_external_stop") {
-          throw new ApiError("K1 сейчас не ожидает подтверждения завершённого STOP.");
-        }
-        const stopOperation = [...(state?.operations ?? [])]
-          .reverse()
-          .find(
-            (operation) =>
-              operation.action === "acquisition.stop" &&
-              operation.status === "operator_action_required",
-          );
-        if (!stopOperation) {
-          throw new ApiError("Не найдена исходная операция STOP; повтор команды запрещён.");
-        }
-        return xgridsK1Api.stopAcquisition({
-          acquisition_id: acquisition.acquisition_id,
-          mode: "graceful",
-          operator_confirmed: true,
-          operation_id: stopOperation.operation_id,
-        });
-      }),
-    [run, state],
-  );
-
   const abort = useCallback(() => {
     const acquisition = state?.acquisition;
     if (!acquisition || isTerminalAcquisitionState(acquisition.state)) {
@@ -485,7 +648,7 @@ export function useXgridsK1Runtime(enabled: boolean) {
 
   useEffect(() => {
     if (!enabled) {
-      mounted.current = true;
+      operatorIntents.current.deactivateRuntime();
       setState(null);
       setBackendStatus("checking");
       setEventStatus("closed");
@@ -495,12 +658,12 @@ export function useXgridsK1Runtime(enabled: boolean) {
       return;
     }
 
-    mounted.current = true;
+    operatorIntents.current.activateRuntime();
     void refresh(true);
     const poll = window.setInterval(() => void refresh(false), 4_000);
 
     return () => {
-      mounted.current = false;
+      operatorIntents.current.deactivateRuntime();
       window.clearInterval(poll);
     };
   }, [enabled, refresh]);
@@ -563,7 +726,6 @@ export function useXgridsK1Runtime(enabled: boolean) {
     startPreparedAcquisition,
     startReplay,
     stop,
-    confirmStoppedAtSteadyGreen,
     abort,
     setObservationSourceActive,
     updateViewerSettings,
diff --git a/plugins/xgrids-k1/profile_loader.py b/plugins/xgrids-k1/profile_loader.py
index a209ea2..8db8abb 100644
--- a/plugins/xgrids-k1/profile_loader.py
+++ b/plugins/xgrids-k1/profile_loader.py
@@ -366,6 +366,23 @@ def _validate_acquisition_control(profile: dict[str, Any]) -> None:
     if control.get("mode") != "operator-manual" or control.get("write_enabled") is not False:
         raise CompatibilityProfileError("acquisition control must remain operator-manual")
 
+    acceptance_transport = _object(
+        control.get("software_acceptance_transport"),
+        "$.acquisition_control.software_acceptance_transport",
+    )
+    if acceptance_transport != {
+        "status": "installed-operator-present",
+        "default_authority": "disabled",
+        "profile_gate": "live-device-info-exact-match",
+        "dialogue": "single-socket-canonical-start-to-stop",
+        "automatic_retry": False,
+        "supported_mount_type": "handheld",
+        "supported_gnss_mode": "none",
+    }:
+        raise CompatibilityProfileError(
+            "software acceptance transport differs from the reviewed operator-present contract"
+        )
+
     device_control = _object(
         control.get("verified_device_control"),
         "$.acquisition_control.verified_device_control",
@@ -497,6 +514,8 @@ def validate_compatibility_profile(profile: Any) -> dict[str, Any]:
     scope = _object(root.get("scope"), "$.scope")
     if scope.get("vendor") != "XGRIDS" or scope.get("model") != "LixelKity K1":
         raise CompatibilityProfileError("profile vendor/model must remain XGRIDS LixelKity K1")
+    if scope.get("platform_type") != "A4":
+        raise CompatibilityProfileError("profile platform type must remain the observed A4")
     firmware = _object(scope.get("firmware"), "$.scope.firmware")
     if firmware != {"match": "exact", "version": "3.0.2"}:
         raise CompatibilityProfileError("profile must match firmware 3.0.2 exactly")
diff --git a/plugins/xgrids-k1/profiles/fw-3.0.2/direct-lan.v1.json b/plugins/xgrids-k1/profiles/fw-3.0.2/direct-lan.v1.json
index c06f877..5d0e29f 100644
--- a/plugins/xgrids-k1/profiles/fw-3.0.2/direct-lan.v1.json
+++ b/plugins/xgrids-k1/profiles/fw-3.0.2/direct-lan.v1.json
@@ -5,6 +5,7 @@
   "scope": {
     "vendor": "XGRIDS",
     "model": "LixelKity K1",
+    "platform_type": "A4",
     "firmware": {
       "match": "exact",
       "version": "3.0.2"
@@ -26,8 +27,8 @@
     "request_topic_subscription_enabled": false,
     "notes": [
       "Loading this descriptive profile does not authorize a BLE or MQTT write.",
-      "The existing reviewed Wi-Fi provisioning procedure remains separately operator-confirmed and is not activated by this profile.",
-      "Observed LixelGO modeling requests describe the wire contract but remain non-replayable and write-disabled.",
+      "The reviewed Wi-Fi provisioning procedure remains a separate explicit operator action and is not activated by loading this profile.",
+      "Observed LixelGO modeling requests remain write-disabled in this descriptive profile; the separately installed acceptance transport requires a live DeviceInfo match and one operator-present action permit.",
       "Unknown firmware, transport, topics, fields, and action responses fail closed."
     ]
   },
@@ -316,6 +317,15 @@
   "acquisition_control": {
     "mode": "operator-manual",
     "write_enabled": false,
+    "software_acceptance_transport": {
+      "status": "installed-operator-present",
+      "default_authority": "disabled",
+      "profile_gate": "live-device-info-exact-match",
+      "dialogue": "single-socket-canonical-start-to-stop",
+      "automatic_retry": false,
+      "supported_mount_type": "handheld",
+      "supported_gnss_mode": "none"
+    },
     "verified_device_control": {
       "gesture": "physical-double-click",
       "state_dependent_result": "start from steady-green standby; stop during active scanning",
@@ -359,7 +369,7 @@
           },
           "success_result_code": 302252033,
           "required_unresolved_context": [
-            "operator-owned Keychain item provisioning and physical acceptance of the uninstalled reviewed transport",
+            "operator-owned Keychain authority provisioning and operator-present physical acceptance",
             "authorization policy for any setting outside the retained request",
             "timeout, rejection and rollback contract"
           ],
@@ -406,7 +416,7 @@
           "request_fields": {},
           "success_result_code": 302252033,
           "required_unresolved_context": [
-            "operator-owned Keychain item provisioning and physical acceptance of the uninstalled reviewed transport",
+            "operator-owned Keychain authority provisioning and operator-present physical acceptance",
             "save-completion and final-standby state mapping",
             "timeout and rollback contract"
           ],
diff --git a/src/k1link/device_plugins/xgrids_k1/camera.py b/src/k1link/device_plugins/xgrids_k1/camera.py
index 1467747..2cc974f 100644
--- a/src/k1link/device_plugins/xgrids_k1/camera.py
+++ b/src/k1link/device_plugins/xgrids_k1/camera.py
@@ -90,6 +90,7 @@ class XgridsK1CameraGateway:
         self._target_host: str | None = None
         self._producer: _CameraProducer | None = None
         self._recording_root: Path | None = None
+        self._expected_source_end_generation: int | None = None
         self._archive_summaries: list[dict[str, Any]] = []
         self._error: dict[str, str] | None = None
         self._closed = False
@@ -124,6 +125,9 @@ class XgridsK1CameraGateway:
                 },
                 "recording": {
                     "active": self._recording_root is not None,
+                    "source_end_expected": (
+                        self._expected_source_end_generation is not None
+                    ),
                     "session": (
                         self._recording_root.name if self._recording_root is not None else None
                     ),
@@ -175,6 +179,7 @@ class XgridsK1CameraGateway:
                 self._revision += 1
                 self._source_id = source_id
                 self._target_host = target
+                self._expected_source_end_generation = None
                 self._phase = "selected"
                 self._error = None
                 recording_active = self._recording_root is not None
@@ -221,6 +226,7 @@ class XgridsK1CameraGateway:
                 self._source_id = None
                 self._target_host = None
                 self._recording_root = None
+                self._expected_source_end_generation = None
                 self._error = None
             self._shutdown_producer(
                 producer,
@@ -248,6 +254,7 @@ class XgridsK1CameraGateway:
                     raise RuntimeError("для camera gateway уже активна другая acquisition-сессия")
                 producer, delivery = self._detach_producer_locked()
                 self._recording_root = root
+                self._expected_source_end_generation = None
                 self._archive_summaries = []
                 selected = self._source_id is not None
                 if selected:
@@ -266,6 +273,29 @@ class XgridsK1CameraGateway:
                 self._spawn_selected_producer()
             return self.snapshot()
 
+    def expect_source_end_for_device_stop(self) -> dict[str, Any]:
+        """Classify one clean FFmpeg EOF as the camera tail of canonical STOP."""
+
+        with self._lock:
+            producer = self._producer
+            if (
+                self._recording_root is not None
+                and producer is not None
+                and producer.archive is not None
+            ):
+                self._expected_source_end_generation = producer.generation
+                self._revision += 1
+            return self.snapshot()
+
+    def cancel_expected_source_end(self) -> dict[str, Any]:
+        """Revoke a STOP expectation when the control checkpoint was not released."""
+
+        with self._lock:
+            if self._expected_source_end_generation is not None:
+                self._expected_source_end_generation = None
+                self._revision += 1
+            return self.snapshot()
+
     def stop_recording(
         self,
         *,
@@ -279,6 +309,7 @@ class XgridsK1CameraGateway:
                 producer, delivery = self._detach_producer_locked()
                 recording_was_active = self._recording_root is not None
                 self._recording_root = None
+                self._expected_source_end_generation = None
                 if self._source_id is not None and self._phase != "error":
                     self._phase = "selected"
                 if recording_was_active or producer is not None:
@@ -361,6 +392,7 @@ class XgridsK1CameraGateway:
                 self._source_id = None
                 self._target_host = None
                 self._recording_root = None
+                self._expected_source_end_generation = None
                 self._error = None
             self._shutdown_producer(
                 producer,
@@ -559,29 +591,49 @@ class XgridsK1CameraGateway:
             delivery = producer.delivery
             producer.delivery = None
             owns_shutdown = self._producer is producer and not producer.stop_requested
+            expected_clean_end = (
+                owns_shutdown
+                and producer.failure_code is None
+                and self._expected_source_end_generation == producer.generation
+            )
             if owns_shutdown:
                 self._producer = None
+                self._expected_source_end_generation = None
                 self._revision += 1
-                if producer.failure_code is None:
+                if expected_clean_end:
+                    self._phase = "idle"
+                    self._source_id = None
+                    self._target_host = None
+                    self._error = None
+                elif producer.failure_code is None:
                     producer.failure_code = "camera-source-ended"
                     self._set_error_locked(
                         "camera-source-ended",
                         _safe_ffmpeg_message(producer.stderr_tail),
                     )
         if delivery is not None:
-            delivery.failure_code = producer.failure_code or "camera-source-ended"
+            delivery.failure_code = (
+                None
+                if expected_clean_end
+                else producer.failure_code or "camera-source-ended"
+            )
             _close_segment_queue(delivery)
         if not owns_shutdown:
             return
         _terminate_process(producer.process)
         status: CameraArchiveStatus = (
-            "interrupted"
-            if producer.failure_code
-            in {"camera-source-ended", "incomplete-fmp4-fragment"}
+            "complete"
+            if expected_clean_end
+            else "interrupted"
+            if producer.failure_code in {"camera-source-ended", "incomplete-fmp4-fragment"}
             else "failed"
         )
         try:
-            self._finalize_archive(producer, status, producer.failure_code)
+            self._finalize_archive(
+                producer,
+                status,
+                None if expected_clean_end else producer.failure_code,
+            )
         except CameraArchiveError:
             with self._lock:
                 self._set_error_locked(
diff --git a/src/k1link/device_plugins/xgrids_k1/cli.py b/src/k1link/device_plugins/xgrids_k1/cli.py
index e8a0ac3..c3ff939 100644
--- a/src/k1link/device_plugins/xgrids_k1/cli.py
+++ b/src/k1link/device_plugins/xgrids_k1/cli.py
@@ -251,7 +251,7 @@ def serve_console(
     ] = 8000,
 ) -> None:
     """Serve the built Mission Core Control Station and loopback control API."""
-    frontend = Path(__file__).resolve().parents[2] / "apps" / "control-station" / "dist"
+    frontend = Path(__file__).resolve().parents[4] / "apps" / "control-station" / "dist"
     if not frontend.is_dir():
         console.print(
             "[red]Frontend build is missing.[/red] Run npm install && npm run build "
diff --git a/src/k1link/device_plugins/xgrids_k1/facade.py b/src/k1link/device_plugins/xgrids_k1/facade.py
index 4af7b52..5ee68ab 100644
--- a/src/k1link/device_plugins/xgrids_k1/facade.py
+++ b/src/k1link/device_plugins/xgrids_k1/facade.py
@@ -6,6 +6,7 @@ import hmac
 import importlib.util
 import json
 import secrets
+import socket
 import threading
 import time
 import unicodedata
@@ -178,17 +179,18 @@ class BleScanRequest(StrictRequest):
 
 
 class CompatibilityAttestationRequest(StrictRequest):
-    """Explicit operator claim required before using the exact lab profile."""
+    """Selected profile whose facts must be verified from live DeviceInfo."""
 
     firmware_version: Literal["3.0.2"]
     topology: Literal["direct-lan"]
-    operator_confirmed: Literal[True]
+    verification: Literal["live-device-info"]
 
 
 class ConnectRequest(StrictRequest):
     device_id: str = Field(min_length=1, max_length=128)
     ssid: str = Field(min_length=1, max_length=128)
     password: SecretStr = Field(min_length=1, max_length=256)
+    connection_mode: Literal["bridge"] = "bridge"
     compatibility_attestation: CompatibilityAttestationRequest
     operation_id: str | None = Field(default=None, min_length=1, max_length=128)
     idempotency_key: str | None = Field(default=None, min_length=1, max_length=160)
@@ -234,6 +236,8 @@ class OperatorPresenceRequest(StrictRequest):
 
 class PrepareAcquisitionRequest(OperationContextRequest):
     project_name: str = Field(min_length=1, max_length=96)
+    mount_type: Literal["handheld"] = "handheld"
+    gnss_mode: Literal["none"] = "none"
     host: str | None = Field(default=None, max_length=15)
     duration_seconds: float = Field(default=3600.0, ge=1.0, le=86_400.0)
     requested_streams: tuple[RequestedStreamId, ...] = DEFAULT_LIVE_STREAMS
@@ -331,6 +335,7 @@ class XgridsK1CompatibilityService:
         self._devices: list[dict[str, Any]] = []
         self._selected_device_id: str | None = None
         self._k1_ip: str | None = None
+        self._connection_mode: Literal["bridge"] | None = None
         self._device_ids_by_transport_ref: dict[str, str] = {}
         self._device_id: str | None = None
         self._device_session_id: str | None = None
@@ -347,6 +352,8 @@ class XgridsK1CompatibilityService:
         self._operations = OperationJournal()
         self._acquisition: AcquisitionRecord | None = None
         self._acquisition_project_name: str | None = None
+        self._acquisition_mount_type: Literal["handheld"] | None = None
+        self._acquisition_gnss_mode: Literal["none"] | None = None
         self._acquisition_out_dir: Path | None = None
         self._acquisition_start_operation_id: str | None = None
         self._acquisition_stop_operation_id: str | None = None
@@ -379,7 +386,8 @@ class XgridsK1CompatibilityService:
         application_control_session = self._application_control_session.snapshot()
         runtime = self.runtime.snapshot()
         camera_preview = self.camera_preview.snapshot()
-        self._reconcile_acquisition(runtime, camera_preview)
+        self._reconcile_acquisition(runtime, camera_preview, application_control_session)
+        runtime = self.runtime.snapshot()
         camera_preview = self.camera_preview.snapshot()
         metrics = runtime["metrics"]
         with self._lock:
@@ -388,6 +396,7 @@ class XgridsK1CompatibilityService:
             devices = list(self._devices)
             selected_device_id = self._selected_device_id
             k1_ip = self._k1_ip
+            connection_mode = self._connection_mode
             device_id = self._device_id
             device_session_id = self._device_session_id
             device_session_opened_at = self._device_session_opened_at
@@ -400,6 +409,8 @@ class XgridsK1CompatibilityService:
             acquisition = self._acquisition.as_dict() if self._acquisition is not None else None
             if acquisition is not None:
                 acquisition["project_name"] = self._acquisition_project_name
+                acquisition["mount_type"] = self._acquisition_mount_type
+                acquisition["gnss_mode"] = self._acquisition_gnss_mode
                 acquisition["cleanup_pending"] = (
                     self._acquisition_session_lease is not None
                     and acquisition["state"] in TERMINAL_ACQUISITION_STATES
@@ -450,6 +461,7 @@ class XgridsK1CompatibilityService:
             "devices": devices,
             "selected_device_id": selected_device_id,
             "k1_ip": k1_ip,
+            "connection_mode": connection_mode,
             "compatibility": {
                 "profile_id": active_profile_id,
                 "decision": "limited" if active_profile_id is not None else "unknown",
@@ -461,9 +473,9 @@ class XgridsK1CompatibilityService:
                     else "evidence-only"
                 ),
                 "firmware_claim": (
-                    "operator-attested-exact-3.0.2"
+                    "live-device-info-verification-required"
                     if compatibility_attestation is not None
-                    else "exact-3.0.2-profile-not-attested"
+                    else "exact-3.0.2-profile-not-selected"
                 ),
                 "attestation": compatibility_attestation,
                 "vendor_writes_enabled": active_control,
@@ -598,6 +610,7 @@ class XgridsK1CompatibilityService:
                 "device_id": request.device_id,
                 "ssid": request.ssid,
                 "password": password,
+                "connection_mode": request.connection_mode,
                 "compatibility_attestation": request.compatibility_attestation.model_dump(
                     mode="json"
                 ),
@@ -678,6 +691,7 @@ class XgridsK1CompatibilityService:
             )
             write_json_atomic(session_dir / "provisioning.sensitive.json", result)
             ipv4 = _provisioned_ipv4(result)
+            local_address_conflict = ipv4 is not None and _target_is_local_ipv4(ipv4)
             write_json_atomic(
                 session_dir / "manifest.redacted.json",
                 {
@@ -688,6 +702,9 @@ class XgridsK1CompatibilityService:
                     "profile_id": result["profile_id"],
                     "outcome": result["outcome"],
                     "k1_lan_address_observed": ipv4 is not None,
+                    "k1_lan_address_admitted": ipv4 is not None
+                    and not local_address_conflict,
+                    "local_address_conflict": local_address_conflict,
                     "credentials_persisted_by_connector": False,
                 },
             )
@@ -695,9 +712,15 @@ class XgridsK1CompatibilityService:
                 raise RuntimeError(
                     "Устройство не сообщило адрес в локальной сети; автоматического повтора не было"
                 )
+            if local_address_conflict:
+                raise RuntimeError(
+                    "Устройство сообщило IPv4-адрес, который уже принадлежит этому компьютеру; "
+                    "адрес K1 не принят и автоматического повтора не было"
+                )
             with self._lock:
                 self._selected_device_id = request.device_id
                 self._k1_ip = ipv4
+                self._connection_mode = request.connection_mode
                 self._device_id = self._device_ids_by_transport_ref.setdefault(
                     request.device_id,
                     new_device_id(),
@@ -792,7 +815,7 @@ class XgridsK1CompatibilityService:
             attestation = self._compatibility_attestation
             acquisition = self._acquisition
         if target is None or attestation is None:
-            raise RuntimeError("сначала подключите и подтвердите exact-profile K1")
+            raise RuntimeError("сначала подключите K1 и выберите exact-profile")
         if acquisition is not None and acquisition.state not in TERMINAL_ACQUISITION_STATES:
             raise RuntimeError("control-сессия должна быть открыта до подготовки acquisition")
         self._application_control.disarm()
@@ -830,7 +853,7 @@ class XgridsK1CompatibilityService:
             if self._k1_ip is None or self._selected_device_id is None:
                 raise RuntimeError("сначала выберите и подключите K1 через BLE/Wi-Fi")
             if self._compatibility_attestation is None:
-                raise RuntimeError("exact FW 3.0.2 direct-LAN profile не подтверждён")
+                raise RuntimeError("exact FW 3.0.2 direct-LAN profile не выбран")
             acquisition = self._acquisition
             if acquisition is not None and acquisition.state not in TERMINAL_ACQUISITION_STATES:
                 raise RuntimeError(
@@ -914,6 +937,8 @@ class XgridsK1CompatibilityService:
                 "requested_streams": requested_streams,
                 "evidence_policy": request.evidence_policy,
                 "project_name": request.project_name,
+                "mount_type": request.mount_type,
+                "gnss_mode": request.gnss_mode,
                 "compatibility_attestation": request.compatibility_attestation.model_dump(
                     mode="json"
                 ),
@@ -974,6 +999,8 @@ class XgridsK1CompatibilityService:
                 )
                 self._acquisition = acquisition
                 self._acquisition_project_name = request.project_name
+                self._acquisition_mount_type = request.mount_type
+                self._acquisition_gnss_mode = request.gnss_mode
                 self._acquisition_out_dir = new_live_session_dir(self.evidence_root)
                 self._acquisition_start_operation_id = None
                 self._acquisition_stop_operation_id = None
@@ -1136,20 +1163,27 @@ class XgridsK1CompatibilityService:
             expected_stop_operation_id = self._acquisition_stop_operation_id
             lease_retained = self._acquisition_session_lease is not None
 
+        terminal_manual_stop_recovery = (
+            request.operator_confirmed
+            and not plugin_commanded
+            and acquisition_state in TERMINAL_ACQUISITION_STATES
+        )
+
         if request.operator_confirmed:
             if request.mode != "graceful":
                 raise ValueError("operator_confirmed допустим только для graceful stop")
-            if acquisition_state != "awaiting_external_stop":
+            if (
+                acquisition_state != "awaiting_external_stop"
+                and not terminal_manual_stop_recovery
+            ):
                 raise ValueError("acquisition не ожидает подтверждения физической остановки")
             if request.operation_id is None or request.operation_id != expected_stop_operation_id:
                 raise ValueError(
                     "подтверждение остановки должно ссылаться на исходную stop-operation"
                 )
-            if plugin_commanded and not self._application_control_session.snapshot()[
-                "can_confirm_standby"
-            ]:
-                raise RuntimeError(
-                    "сначала дождитесь READY от K1 и визуально подтвердите зелёный индикатор"
+            if plugin_commanded:
+                raise ValueError(
+                    "канонический STOP завершается автоматически по READY от K1"
                 )
         elif (
             request.mode == "graceful"
@@ -1180,6 +1214,14 @@ class XgridsK1CompatibilityService:
             if self._application_control_session.snapshot()["state"] != "scanning":
                 raise RuntimeError("канонический диалог K1 ещё не готов принять STOP")
 
+        if terminal_manual_stop_recovery:
+            if lease_retained:
+                self._stop_acquisition_sources(
+                    camera_status="failed",
+                    camera_failure_code="terminal-local-failure-after-device-stop",
+                )
+            return self.state()
+
         request_fingerprint = self._request_fingerprint(
             ACTION_ACQUISITION_STOP,
             {
@@ -1271,9 +1313,14 @@ class XgridsK1CompatibilityService:
         if request.mode == "graceful" and not request.operator_confirmed:
             if plugin_commanded:
                 assert request.physical_acceptance is not None
-                self._application_control_session.request_stop(
-                    confirmation=request.physical_acceptance.confirmation()
-                )
+                self.camera_preview.expect_source_end_for_device_stop()
+                try:
+                    self._application_control_session.request_stop(
+                        confirmation=request.physical_acceptance.confirmation()
+                    )
+                except Exception:
+                    self.camera_preview.cancel_expected_source_end()
+                    raise
             with self._lock:
                 acquisition.transition(
                     "awaiting_external_stop",
@@ -1282,22 +1329,17 @@ class XgridsK1CompatibilityService:
                         if plugin_commanded
                         else "acquisition.stop.operator_action_required"
                     ),
-                    operator_instructions=(
-                        (
-                            "Канонический STOP запрошен один раз. Дождитесь READY, "
-                            "убедитесь, что индикатор постоянно зелёный, и подтвердите это."
-                            if plugin_commanded
-                            else (
-                                "Дважды нажмите физическую кнопку устройства и "
-                                "подтвердите остановку."
-                            )
-                        ),
+                    operator_instructions=()
+                    if plugin_commanded
+                    else (
+                        "Дважды нажмите физическую кнопку устройства и "
+                        "подтвердите остановку.",
                     ),
                 )
                 self._acquisition_stop_operation_id = operation.operation_id
             self._operations.transition(
                 operation.operation_id,
-                "operator_action_required",
+                "running" if plugin_commanded else "operator_action_required",
                 stage_code="awaiting-external-stop",
                 message_code=(
                     "acquisition.stop.device_stopping"
@@ -1315,8 +1357,6 @@ class XgridsK1CompatibilityService:
             message_code="acquisition.stop.stopping_receiver",
         )
         try:
-            if plugin_commanded and request.mode == "graceful" and request.operator_confirmed:
-                self._application_control_session.confirm_standby()
             with self._lock:
                 acquisition.transition("stopping", message_code="acquisition.stopping")
             self._stop_acquisition_sources(
@@ -1814,18 +1854,51 @@ class XgridsK1CompatibilityService:
         self,
         runtime: Mapping[str, Any],
         camera: Mapping[str, Any],
+        application_control_session: Mapping[str, Any],
     ) -> None:
+        with self._lock:
+            current = self._acquisition
+            terminal_canonical_cleanup = (
+                current is not None
+                and current.state in TERMINAL_ACQUISITION_STATES
+                and current.control_mode == "plugin-commanded"
+                and application_control_session.get("state") == "completed"
+                and self._acquisition_session_lease is not None
+            )
+            terminal_camera_status: Literal["complete", "failed"] = (
+                "complete"
+                if current is not None and current.state == "completed"
+                else "failed"
+            )
+        if terminal_canonical_cleanup:
+            self._stop_acquisition_sources(
+                camera_status=terminal_camera_status,
+                camera_failure_code=(
+                    None
+                    if terminal_camera_status == "complete"
+                    else "terminal-local-failure-after-device-standby"
+                ),
+            )
+            return
+
         completed_operation_id: str | None = None
         failed_operation_id: str | None = None
         failed_stop_operation_id: str | None = None
         unconfirmed_stop_operation_id: str | None = None
+        completed_stop_operation_id: str | None = None
         receiver_ready_operation_id: str | None = None
         receiver_plugin_commanded = False
         acquisition_id: str | None = None
         camera_terminal_status: Literal["complete", "failed"] | None = None
         camera_failure_code: str | None = None
         stop_runtime_for_camera_failure = False
+        stop_runtime_for_canonical_completion = False
         complete_after_seal = False
+        completion_message_code = "acquisition.receiver_completed"
+        completion_result: dict[str, Any] = {
+            "receiver_stopped": True,
+            "device_state": "unknown",
+        }
         with self._lock:
             acquisition = self._acquisition
             if acquisition is None or acquisition.state in TERMINAL_ACQUISITION_STATES:
@@ -1870,6 +1943,25 @@ class XgridsK1CompatibilityService:
                     failed_stop_operation_id = self._acquisition_stop_operation_id
                 camera_terminal_status = "failed"
                 stop_runtime_for_camera_failure = True
+            elif (
+                acquisition.state == "awaiting_external_stop"
+                and acquisition.control_mode == "plugin-commanded"
+                and application_control_session.get("state") == "completed"
+            ):
+                acquisition.transition(
+                    "finalizing",
+                    message_code="acquisition.stop.device_standby_confirmed",
+                )
+                camera_terminal_status = "complete"
+                stop_runtime_for_canonical_completion = True
+                complete_after_seal = True
+                completed_stop_operation_id = self._acquisition_stop_operation_id
+                completion_message_code = "acquisition.stop.completed"
+                completion_result = {
+                    "receiver_stopped": True,
+                    "device_state": "ready",
+                    "device_stop": "protocol-confirmed",
+                }
             elif acquisition.state in {"starting", "awaiting_external_start"} and point_frames > 0:
                 acquisition.transition("acquiring", message_code="acquisition.acquiring")
                 completed_operation_id = self._acquisition_start_operation_id
@@ -1954,7 +2046,7 @@ class XgridsK1CompatibilityService:
                 )
             except Exception as exc:
                 terminal_error = exc
-            if stop_runtime_for_camera_failure:
+            if stop_runtime_for_camera_failure or stop_runtime_for_canonical_completion:
                 try:
                     self.runtime.stop()
                 except Exception as exc:
@@ -1973,11 +2065,8 @@ class XgridsK1CompatibilityService:
                         if acquisition.state not in TERMINAL_ACQUISITION_STATES:
                             acquisition.transition(
                                 "completed",
-                                message_code="acquisition.receiver_completed",
-                                result={
-                                    "receiver_stopped": True,
-                                    "device_state": "unknown",
-                                },
+                                message_code=completion_message_code,
+                                result=completion_result,
                             )
             except Exception as exc:
                 reconciliation_error = exc
@@ -2058,6 +2147,32 @@ class XgridsK1CompatibilityService:
                     "side_effect_status": "unknown",
                 },
             )
+        if completed_stop_operation_id is not None:
+            if reconciliation_error is None:
+                self._operations.transition_if_pending(
+                    completed_stop_operation_id,
+                    "succeeded",
+                    stage_code="device-standby-confirmed",
+                    message_code="acquisition.stop.completed",
+                    result={
+                        "acquisition_id": acquisition.acquisition_id,
+                        "confirmation": "device-status-ready-unbound",
+                    },
+                )
+            else:
+                self._operations.transition_if_pending(
+                    completed_stop_operation_id,
+                    "failed",
+                    stage_code="local-finalization-failed",
+                    message_code="acquisition.stop.local_finalization_failed",
+                    error={
+                        "category": "stream",
+                        "code": "local-finalization-failed-after-device-standby",
+                        "retryable": True,
+                        "safe_to_retry": True,
+                        "side_effect_status": "succeeded",
+                    },
+                )
         with self._lock:
             if self._acquisition_start_operation_id in {
                 completed_operation_id,
@@ -2068,6 +2183,8 @@ class XgridsK1CompatibilityService:
                 self._acquisition_stop_operation_id = None
             if self._acquisition_stop_operation_id == unconfirmed_stop_operation_id:
                 self._acquisition_stop_operation_id = None
+            if self._acquisition_stop_operation_id == completed_stop_operation_id:
+                self._acquisition_stop_operation_id = None
         if reconciliation_error is not None:
             raise reconciliation_error
 
@@ -2345,7 +2462,8 @@ def _attestation_snapshot(
     return {
         "firmware_version": attestation.firmware_version,
         "topology": attestation.topology,
-        "basis": "operator-attested",
+        "verification": attestation.verification,
+        "basis": "selected-profile-live-device-info-required",
         "observed_at": _utc_now_iso(),
     }
 
@@ -2394,7 +2512,7 @@ def _sensor_catalog(
                     else (
                         "local-runtime-dependency-missing"
                         if camera_profile_active
-                        else "profile-not-attested"
+                        else "profile-not-selected"
                     )
                 ),
                 "endpoint_label": f"RTSP · {side}",
@@ -2506,6 +2624,24 @@ def _provisioned_ipv4(result: Mapping[str, Any]) -> str | None:
     return None
 
 
+def _target_is_local_ipv4(target: str) -> bool:
+    """Reject a BLE-reported target when the host route resolves back to itself.
+
+    Connecting a UDP socket only asks the kernel to select a route and source
+    address; it does not transmit a datagram. This keeps provisioning admission
+    free of a speculative device probe while preventing a host address from
+    being mistaken for the K1 endpoint.
+    """
+
+    try:
+        with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as route_socket:
+            route_socket.connect((validate_private_ipv4(target), 9))
+            source_address = str(route_socket.getsockname()[0])
+    except OSError as exc:
+        raise RuntimeError("не удалось безопасно проверить маршрут к адресу K1") from exc
+    return source_address == target
+
+
 def _validate_installed_compatibility_profile(repository_root: Path) -> None:
     """Run the plugin-owned, fail-closed profile validator before activation."""
 
diff --git a/src/k1link/device_plugins/xgrids_k1/protocol/application_acceptance.py b/src/k1link/device_plugins/xgrids_k1/protocol/application_acceptance.py
index 1d231b9..b1064ce 100644
--- a/src/k1link/device_plugins/xgrids_k1/protocol/application_acceptance.py
+++ b/src/k1link/device_plugins/xgrids_k1/protocol/application_acceptance.py
@@ -11,6 +11,7 @@ from typing import Literal, Protocol
 from k1link.device_plugins.xgrids_k1.protocol.application_bootstrap import (
     MODELING_STATUS_RESPONSE_TOPIC,
     ApplicationBootstrapError,
+    ApplicationCompatibilityProfileError,
     ApplicationControlAuthority,
     CanonicalPostStartObservation,
     LiveDeviceControlBinding,
@@ -39,18 +40,31 @@ MAX_ACCEPTANCE_PERMIT_SECONDS = 120.0
 
 # Socket-pump quantum only. It is never used to advance a K1 dialogue stage.
 CONTROL_NETWORK_PUMP_QUANTUM_SECONDS = 1.0
+SCAN_INITIALIZATION_TIMEOUT_SECONDS = 120.0
 
 
 class ApplicationAcceptanceError(RuntimeError):
     """The operator-present physical acceptance contract failed closed."""
 
 
+class ScanInitializationTimeout(ApplicationAcceptanceError):
+    """START was acknowledged but the reviewed SCANNING gate never completed."""
+
+    reason_code = "scan_initialization_timeout"
+
+
+class ApplicationProfileMismatchError(ApplicationAcceptanceError):
+    """A correlated live DeviceInfo response rejected the selected profile."""
+
+    reason_code = "compatibility_profile_mismatch"
+
+
 class ApplicationBatchExchange(Protocol):
     def exchange_batch_once(
         self,
         envelopes: Sequence[OneShotPublishEnvelope],
         *,
-        required_response_topics: Collection[str],
+        required_response_operation_keys: Collection[str],
     ) -> dict[str, bytes]: ...
 
     def maintain_open_for(
@@ -182,8 +196,24 @@ class PhysicalAcceptanceDialogueExecutor:
     def __init__(
         self,
         transport: ApplicationBatchExchange,
+        *,
+        monotonic: Callable[[], float] = time.monotonic,
+        scan_initialization_timeout_seconds: float = SCAN_INITIALIZATION_TIMEOUT_SECONDS,
     ) -> None:
+        if (
+            not isinstance(scan_initialization_timeout_seconds, (int, float))
+            or isinstance(scan_initialization_timeout_seconds, bool)
+            or not math.isfinite(scan_initialization_timeout_seconds)
+            or scan_initialization_timeout_seconds <= 0
+        ):
+            raise ApplicationAcceptanceError(
+                "scan initialization timeout must be a positive finite number"
+            )
         self._transport = transport
+        self._monotonic = monotonic
+        self._scan_initialization_timeout_seconds = float(
+            scan_initialization_timeout_seconds
+        )
         self._bootstrap_complete = False
         self._command_complete = False
         self._dialogue_stage = "new"
@@ -199,6 +229,7 @@ class PhysicalAcceptanceDialogueExecutor:
         self._stop_permit_snapshot: dict[str, object] | None = None
         self._response_evidence: list[dict[str, object]] = []
         self._correlation_failure: dict[str, object] | None = None
+        self._compatibility_failure: dict[str, object] | None = None
 
     def run_bootstrap(
         self,
@@ -217,7 +248,7 @@ class PhysicalAcceptanceDialogueExecutor:
 
         if self._dialogue_stage != "new" or self._bootstrap_complete or self._command_complete:
             raise ApplicationAcceptanceError("connection stage is not admissible now")
-        for expected_batch in (1, 2, 3):
+        for expected_batch in (1, 2):
             self._exchange_bootstrap_batch(orchestrator, expected_batch=expected_batch)
         binding = orchestrator.binding
         if binding is None:
@@ -270,7 +301,7 @@ class PhysicalAcceptanceDialogueExecutor:
         if self._dialogue_stage != "connection-ready":
             raise ApplicationAcceptanceError("workspace entry requires the connection stage")
         self._consume_checkpoint(checkpoint, expected="workspace-entered")
-        self._exchange_bootstrap_batch(orchestrator, expected_batch=4)
+        self._exchange_bootstrap_batch(orchestrator, expected_batch=3)
         binding = orchestrator.binding
         if binding is None:
             raise ApplicationAcceptanceError("workspace entry lost the live device binding")
@@ -287,7 +318,7 @@ class PhysicalAcceptanceDialogueExecutor:
         if self._dialogue_stage != "workspace-ready":
             raise ApplicationAcceptanceError("project prompt requires workspace entry")
         self._consume_checkpoint(checkpoint, expected="project-prompt-opened")
-        self._exchange_bootstrap_batch(orchestrator, expected_batch=5)
+        self._exchange_bootstrap_batch(orchestrator, expected_batch=4)
         if not orchestrator.snapshot().bootstrap_complete:
             raise ApplicationAcceptanceError("project prompt did not complete the transcript")
         binding = orchestrator.binding
@@ -338,9 +369,9 @@ class PhysicalAcceptanceDialogueExecutor:
         self._dialogue_stage = "start-attempted"
         responses = self._transport.exchange_batch_once(
             [OneShotPublishEnvelope.from_modeling_command(command)],
-            required_response_topics={MODELING_RESPONSE_TOPIC},
+            required_response_operation_keys={"modeling:start"},
         )
-        payload = responses[MODELING_RESPONSE_TOPIC]
+        payload = responses["modeling:start"]
         self._record_response_evidence(
             phase="modeling",
             operation_key="modeling:start",
@@ -363,24 +394,33 @@ class PhysicalAcceptanceDialogueExecutor:
         immediate = post_start.immediate_modeling_status
         self._transport.exchange_batch_once(
             [OneShotPublishEnvelope.from_dialogue_request(immediate)],
-            required_response_topics=(),
+            required_response_operation_keys=(),
         )
         self._dialogue_stage = "initializing"
+        initialization_deadline = (
+            self._monotonic() + self._scan_initialization_timeout_seconds
+        )
         while not self._transport.scan_initialization_complete(binding):
+            if self._monotonic() >= initialization_deadline:
+                raise ScanInitializationTimeout(
+                    "K1 did not confirm bound SCANNING initialization before the safety deadline"
+                )
             self._transport.maintain_open_for(
                 CONTROL_NETWORK_PUMP_QUANTUM_SECONDS,
                 allowed_response_topics={MODELING_STATUS_RESPONSE_TOPIC},
             )
 
         refresh = post_start.post_initialization_refresh
-        required_topics = {request.response_topic for request in refresh}
+        required_operations = {
+            f"dialogue:{request.ordinal}:{request.message_type}" for request in refresh
+        }
         refresh_responses = self._transport.exchange_batch_once(
             [OneShotPublishEnvelope.from_dialogue_request(request) for request in refresh],
-            required_response_topics=required_topics,
+            required_response_operation_keys=required_operations,
         )
         for request in refresh:
-            refresh_payload = refresh_responses[request.response_topic]
             operation_key = f"dialogue:{request.ordinal}:{request.message_type}"
+            refresh_payload = refresh_responses[operation_key]
             self._record_response_evidence(
                 phase="post-start",
                 operation_key=operation_key,
@@ -480,9 +520,9 @@ class PhysicalAcceptanceDialogueExecutor:
         self._dialogue_stage = "stop-attempted"
         responses = self._transport.exchange_batch_once(
             [OneShotPublishEnvelope.from_modeling_command(command)],
-            required_response_topics={MODELING_RESPONSE_TOPIC},
+            required_response_operation_keys={"modeling:stop"},
         )
-        payload = responses[MODELING_RESPONSE_TOPIC]
+        payload = responses["modeling:stop"]
         self._record_response_evidence(
             phase="modeling",
             operation_key="modeling:stop",
@@ -505,16 +545,13 @@ class PhysicalAcceptanceDialogueExecutor:
         self._dialogue_stage = "stop-acknowledged"
         return response
 
-    def maintain_post_stop_until_standby_confirmed(
-        self,
-        standby_confirmed: Callable[[], bool],
-    ) -> None:
-        """Keep servicing control reports through save and physical standby.
+    def maintain_post_stop_until_standby(self) -> None:
+        """Keep servicing control reports through save and protocol standby.
 
-        The retained capture does not expose a protocol timer that proves save
-        completion.  The session therefore remains owned until an explicit
-        operator/status gate confirms standby and never closes itself merely
-        because a captured wall-clock duration elapsed.
+        There is no wall-clock shortcut after STOP. The dialogue remains owned
+        until the bound K1 itself reports READY with no project attached. That
+        live protocol state is the canonical completion evidence; a second
+        operator acknowledgement would add no independent information.
         """
 
         if self._dialogue_stage != "stop-acknowledged" or not self._stop_complete:
@@ -524,9 +561,7 @@ class PhysicalAcceptanceDialogueExecutor:
         binding = self._active_binding
         if binding is None:
             raise ApplicationAcceptanceError("canonical START binding is no longer available")
-        while not (
-            self._transport.standby_complete(binding) and standby_confirmed()
-        ):
+        while not self._transport.standby_complete(binding):
             self._transport.maintain_open_for(
                 CONTROL_NETWORK_PUMP_QUANTUM_SECONDS,
                 allowed_response_topics={MODELING_STATUS_RESPONSE_TOPIC},
@@ -555,12 +590,19 @@ class PhysicalAcceptanceDialogueExecutor:
                 if self._stop_permit_snapshot is not None
                 else None
             ),
-            "response_evidence": tuple(dict(item) for item in self._response_evidence),
+            # This snapshot crosses the plugin SDK boundary, whose JsonValue
+            # contract intentionally rejects Python-only container types.
+            "response_evidence": [dict(item) for item in self._response_evidence],
             "correlation_failure": (
                 dict(self._correlation_failure)
                 if self._correlation_failure is not None
                 else None
             ),
+            "compatibility_failure": (
+                dict(self._compatibility_failure)
+                if self._compatibility_failure is not None
+                else None
+            ),
             "automatic_retry": False,
         }
 
@@ -608,18 +650,20 @@ class PhysicalAcceptanceDialogueExecutor:
                 f"canonical bootstrap expected batch {expected_batch}"
             )
         batch = orchestrator.next_batch()
-        required_topics = {
-            request.response_topic for request in batch if request.response_required
+        required_operations = {
+            f"bootstrap:{request.ordinal}:{request.message_type}"
+            for request in batch
+            if request.response_required
         }
         responses = self._transport.exchange_batch_once(
             [OneShotPublishEnvelope.from_bootstrap_request(request) for request in batch],
-            required_response_topics=required_topics,
+            required_response_operation_keys=required_operations,
         )
         for request in batch:
             if not request.response_required:
                 continue
-            payload = responses[request.response_topic]
             operation_key = f"bootstrap:{request.ordinal}:{request.message_type}"
+            payload = responses[operation_key]
             self._record_response_evidence(
                 phase="bootstrap",
                 operation_key=operation_key,
@@ -627,7 +671,25 @@ class PhysicalAcceptanceDialogueExecutor:
                 payload=payload,
             )
             try:
-                orchestrator.accept_response(request.response_topic, payload)
+                orchestrator.accept_response(operation_key, payload)
+            except ApplicationCompatibilityProfileError as exc:
+                self._compatibility_failure = {
+                    "phase": "bootstrap",
+                    "operation_key": operation_key,
+                    "response_topic": request.response_topic,
+                    "reason_code": exc.reason_code,
+                    "expected": {
+                        "device_model": "LixelKity K1",
+                        "platform_type": "A4",
+                        "firmware": "3.0.2",
+                        "is_activated": True,
+                    },
+                    "observed": dict(exc.observed_facts),
+                }
+                raise ApplicationProfileMismatchError(
+                    "live DeviceInfo is incompatible with the selected "
+                    "LixelKity K1 / A4 / FW 3.0.2 profile"
+                ) from exc
             except ApplicationBootstrapError as exc:
                 self._record_correlation_failure(
                     phase="bootstrap",
@@ -670,5 +732,23 @@ class PhysicalAcceptanceDialogueExecutor:
             "phase": phase,
             "operation_key": operation_key,
             "response_topic": response_topic,
+            "reason_code": self._correlation_reason_code(reason),
             "reason": reason,
         }
+
+    @staticmethod
+    def _correlation_reason_code(reason: str) -> str:
+        reason_fragments = (
+            ("session correlation failed", "response_session_mismatch"),
+            ("vendor identity mismatch", "response_device_identity_mismatch"),
+            ("authority mismatch", "response_authority_mismatch"),
+            ("result code", "response_rejected"),
+            ("facts changed", "response_device_facts_changed"),
+            ("invalid", "response_decode_failed"),
+            ("missing", "response_decode_failed"),
+            ("wrong wire type", "response_decode_failed"),
+        )
+        return next(
+            (code for fragment, code in reason_fragments if fragment in reason),
+            "response_correlation_failed",
+        )
diff --git a/src/k1link/device_plugins/xgrids_k1/protocol/application_authority.py b/src/k1link/device_plugins/xgrids_k1/protocol/application_authority.py
index cf4d1d8..5fc3e3a 100644
--- a/src/k1link/device_plugins/xgrids_k1/protocol/application_authority.py
+++ b/src/k1link/device_plugins/xgrids_k1/protocol/application_authority.py
@@ -1,11 +1,12 @@
 from __future__ import annotations
 
+import importlib
 import platform
 import shutil
 import subprocess
 import sys
 from dataclasses import dataclass
-from typing import Protocol
+from typing import Any, Protocol, cast
 
 from k1link.device_plugins.xgrids_k1.protocol.application_bootstrap import (
     ApplicationBootstrapError,
@@ -33,6 +34,10 @@ class CommandRunner(Protocol):
     ) -> subprocess.CompletedProcess[bytes]: ...
 
 
+class KeychainSecretReader(Protocol):
+    def __call__(self, *, service: str, account: str) -> bytes: ...
+
+
 class InteractiveCommandRunner(Protocol):
     def __call__(
         self,
@@ -43,6 +48,63 @@ class InteractiveCommandRunner(Protocol):
     ) -> subprocess.CompletedProcess[bytes]: ...
 
 
+def _read_keychain_secret_via_security_framework(*, service: str, account: str) -> bytes:
+    """Read one fixed generic-password item without spawning a UI/CLI process."""
+
+    try:
+        objc = importlib.import_module("objc")
+        foundation = importlib.import_module("Foundation")
+        bundle = foundation.NSBundle.bundleWithPath_(
+            "/System/Library/Frameworks/Security.framework"
+        )
+        if bundle is None or not bundle.load():
+            raise RuntimeError("Security.framework is unavailable")
+
+        symbols: dict[str, Any] = {}
+        objc.loadBundleVariables(
+            bundle,
+            symbols,
+            [
+                ("kSecClass", b"@"),
+                ("kSecClassGenericPassword", b"@"),
+                ("kSecAttrService", b"@"),
+                ("kSecAttrAccount", b"@"),
+                ("kSecReturnData", b"@"),
+                ("kSecMatchLimit", b"@"),
+                ("kSecMatchLimitOne", b"@"),
+            ],
+        )
+        functions: dict[str, Any] = {}
+        objc.loadBundleFunctions(
+            bundle,
+            functions,
+            [("SecItemCopyMatching", b"i@o^@")],
+        )
+        query = {
+            symbols["kSecClass"]: symbols["kSecClassGenericPassword"],
+            symbols["kSecAttrService"]: service,
+            symbols["kSecAttrAccount"]: account,
+            symbols["kSecReturnData"]: True,
+            symbols["kSecMatchLimit"]: symbols["kSecMatchLimitOne"],
+        }
+        copy_matching = cast(Any, functions["SecItemCopyMatching"])
+        result = copy_matching(query, None)
+    except ApplicationAuthorityLoadError:
+        raise
+    except Exception as exc:
+        raise ApplicationAuthorityLoadError("macOS Keychain authority lookup failed") from exc
+
+    if not isinstance(result, tuple) or len(result) != 2:
+        raise ApplicationAuthorityLoadError("macOS Keychain authority lookup failed")
+    status, secret_data = result
+    if int(status) != 0 or secret_data is None:
+        raise ApplicationAuthorityLoadError("macOS Keychain authority is unavailable")
+    try:
+        return bytes(secret_data)
+    except Exception as exc:
+        raise ApplicationAuthorityLoadError("macOS Keychain authority lookup failed") from exc
+
+
 @dataclass(frozen=True, slots=True)
 class ApplicationAuthoritySourceSnapshot:
     provider: str = "macos-keychain"
@@ -69,12 +131,19 @@ class MacOSKeychainApplicationAuthorityLoader:
     """Read the exact-profile authority from the current user's Keychain.
 
     There is deliberately no environment, plaintext-file, browser or API
-    fallback.  The secret is requested through the absolute ``security`` binary
-    and is never interpolated into an exception, repr or subprocess argument.
+    fallback. Runtime reads call Apple's Security.framework in-process and
+    never launch Keychain Access or the ``security`` CLI. The optional command
+    runner exists only as a compatibility seam for the reviewed test harness.
     """
 
-    def __init__(self, *, runner: CommandRunner = subprocess.run) -> None:
+    def __init__(
+        self,
+        *,
+        runner: CommandRunner | None = None,
+        framework_reader: KeychainSecretReader = _read_keychain_secret_via_security_framework,
+    ) -> None:
         self._runner = runner
+        self._framework_reader = framework_reader
 
     def snapshot(self) -> ApplicationAuthoritySourceSnapshot:
         return ApplicationAuthoritySourceSnapshot()
@@ -84,32 +153,48 @@ class MacOSKeychainApplicationAuthorityLoader:
             raise ApplicationAuthorityLoadError(
                 "application authority loading is supported only through macOS Keychain"
             )
-        security = shutil.which("security")
-        if security != "/usr/bin/security":
-            raise ApplicationAuthorityLoadError("trusted macOS security binary is unavailable")
+        if self._runner is None:
+            try:
+                secret_bytes = self._framework_reader(
+                    service=KEYCHAIN_SERVICE,
+                    account=KEYCHAIN_ACCOUNT,
+                )
+            except ApplicationAuthorityLoadError:
+                raise
+            except Exception as exc:
+                raise ApplicationAuthorityLoadError(
+                    "macOS Keychain authority lookup failed"
+                ) from exc
+        else:
+            security = shutil.which("security")
+            if security != "/usr/bin/security":
+                raise ApplicationAuthorityLoadError(
+                    "trusted macOS security binary is unavailable"
+                )
+            try:
+                completed = self._runner(
+                    [
+                        security,
+                        "find-generic-password",
+                        "-s",
+                        KEYCHAIN_SERVICE,
+                        "-a",
+                        KEYCHAIN_ACCOUNT,
+                        "-w",
+                    ],
+                    capture_output=True,
+                    check=False,
+                    timeout=KEYCHAIN_TIMEOUT_SECONDS,
+                )
+            except (OSError, subprocess.SubprocessError) as exc:
+                raise ApplicationAuthorityLoadError(
+                    "macOS Keychain authority lookup failed"
+                ) from exc
+            if completed.returncode != 0:
+                raise ApplicationAuthorityLoadError("macOS Keychain authority is unavailable")
+            secret_bytes = completed.stdout
 
-        try:
-            completed = self._runner(
-                [
-                    security,
-                    "find-generic-password",
-                    "-s",
-                    KEYCHAIN_SERVICE,
-                    "-a",
-                    KEYCHAIN_ACCOUNT,
-                    "-w",
-                ],
-                capture_output=True,
-                check=False,
-                timeout=KEYCHAIN_TIMEOUT_SECONDS,
-            )
-        except (OSError, subprocess.SubprocessError) as exc:
-            raise ApplicationAuthorityLoadError("macOS Keychain authority lookup failed") from exc
-
-        if completed.returncode != 0:
-            raise ApplicationAuthorityLoadError("macOS Keychain authority is unavailable")
-
-        secret_buffer = bytearray(completed.stdout)
+        secret_buffer = bytearray(secret_bytes)
         try:
             while secret_buffer.endswith((b"\n", b"\r")):
                 secret_buffer.pop()
diff --git a/src/k1link/device_plugins/xgrids_k1/protocol/application_bootstrap.py b/src/k1link/device_plugins/xgrids_k1/protocol/application_bootstrap.py
index 5ff4b45..21f122b 100644
--- a/src/k1link/device_plugins/xgrids_k1/protocol/application_bootstrap.py
+++ b/src/k1link/device_plugins/xgrids_k1/protocol/application_bootstrap.py
@@ -11,6 +11,7 @@ from k1link.device_plugins.xgrids_k1.protocol.modeling_control import OPENAPI_SU
 from k1link.device_plugins.xgrids_k1.protocol.protobuf_wire import (
     ProtobufWireError,
     ProtoField,
+    encode_zigzag64,
     iter_fields,
 )
 
@@ -19,6 +20,12 @@ MAX_HEADER_BYTES = 4 * 1024
 MAX_TEXT_BYTES = 4 * 1024
 APPLICATION_AUTHORITY_SOURCE = "owner-captured-lixelgo-application"
 COMPATIBILITY_PROFILE_ID = "xgrids.lixelkity-k1.fw-3.0.2.direct-lan.v1"
+REVIEWED_DEVICE_MODEL = "LixelKity K1"
+REVIEWED_DEVICE_TYPE = "A4"
+REVIEWED_PROFILE_ATTESTATION_FAILURE = (
+    "live DeviceInfo does not attest the reviewed activated "
+    "LixelKity K1 (platform type A4) FW 3.0.2 profile"
+)
 DEVICE_CONFIG_TIME_CONTEXT = "Publish_Proto_DeviceConfig_SetTime"
 SHADOW_BLOCKERS = ("vendor-writes-disabled", "publisher-not-installed")
 
@@ -40,6 +47,22 @@ class ApplicationBootstrapError(ValueError):
     """The recovered K1 application bootstrap contract was violated."""
 
 
+class ApplicationCompatibilityProfileError(ApplicationBootstrapError):
+    """A correlated DeviceInfo response does not match the selected profile."""
+
+    reason_code = "compatibility_profile_mismatch"
+
+    def __init__(self, binding: LiveDeviceControlBinding) -> None:
+        self.observed_facts = {
+            "device_model": binding.device_model,
+            "platform_type": binding.device_type,
+            "software_version": binding.software_version,
+            "system_version": binding.system_version,
+            "is_activated": binding.is_activated,
+        }
+        super().__init__(REVIEWED_PROFILE_ATTESTATION_FAILURE)
+
+
 @dataclass(frozen=True, slots=True)
 class ApplicationControlAuthority:
     """Private authority belonging to the reviewed LixelGO application profile.
@@ -98,9 +121,22 @@ class LiveDeviceControlBinding:
             self.system_version, "3.0.2"
         )
 
+    @property
+    def matches_reviewed_device(self) -> bool:
+        """Match the exact model/type strings retained from the reviewed K1."""
+
+        return (
+            self.device_model == REVIEWED_DEVICE_MODEL
+            and self.device_type == REVIEWED_DEVICE_TYPE
+        )
+
     @property
     def ready_for_reviewed_profile(self) -> bool:
-        return self.is_activated and self.matches_reviewed_firmware
+        return (
+            self.is_activated
+            and self.matches_reviewed_device
+            and self.matches_reviewed_firmware
+        )
 
 
 @dataclass(frozen=True, slots=True)
@@ -213,6 +249,15 @@ class ApplicationResponse:
     result_code: int
 
 
+@dataclass(frozen=True, slots=True)
+class ApplicationMessageIdentity:
+    """Redacted identity used to route one protobuf request/response safely."""
+
+    vendor_device_id: str | None = field(repr=False)
+    session_id: str = field(repr=False)
+    openapi_key: str = field(repr=False)
+
+
 @dataclass(frozen=True, slots=True)
 class ApplicationBootstrapSnapshot:
     current_batch: int
@@ -253,9 +298,7 @@ def build_shadow_bootstrap(
     """
 
     if not binding.ready_for_reviewed_profile:
-        raise ApplicationBootstrapError(
-            "live DeviceInfo does not attest the reviewed activated FW 3.0.2 profile"
-        )
+        raise ApplicationCompatibilityProfileError(binding)
     if not isinstance(epoch_seconds, int) or isinstance(epoch_seconds, bool):
         raise ApplicationBootstrapError("epoch_seconds must be an integer")
     if epoch_seconds < 0 or epoch_seconds > 0x7FFF_FFFF_FFFF_FFFF:
@@ -373,7 +416,9 @@ def build_shadow_bootstrap(
         )
         body = b""
         if message_type == "DeviceConfigRequest":
-            time_config = _varint_field(1, epoch_seconds) + _text_field(2, timezone_name)
+            time_config = _varint_field(1, encode_zigzag64(epoch_seconds)) + _text_field(
+                2, timezone_name
+            )
             body = _bytes_field(4, time_config)
         payload = _bytes_field(1, _encode_header(header)) + body
         _check_payload(payload, "application request")
@@ -406,9 +451,7 @@ def build_canonical_post_start_observation(
     """Build retained operations 12-14 without granting publish authority."""
 
     if not binding.ready_for_reviewed_profile:
-        raise ApplicationBootstrapError(
-            "live DeviceInfo does not attest the reviewed activated FW 3.0.2 profile"
-        )
+        raise ApplicationCompatibilityProfileError(binding)
 
     def build(
         ordinal: Literal[12, 13, 14],
@@ -577,15 +620,43 @@ def correlate_application_response(
     return ApplicationResponse(session_id, device_id, openapi_key, result_code)
 
 
+def decode_application_message_identity(payload: bytes) -> ApplicationMessageIdentity:
+    """Decode only the common header identity without exposing message bodies."""
+
+    _check_payload(payload, "application message")
+    top = _selected_unique_fields(
+        payload,
+        "application message",
+        max_fields=64,
+        selected={1},
+    )
+    header = _selected_unique_fields(
+        _required_bytes(top, 1, "message.header"),
+        "header",
+        max_fields=32,
+        selected={4, 5, 6},
+    )
+    return ApplicationMessageIdentity(
+        vendor_device_id=(
+            _identity_field(header, 4, "header.device_id") if 4 in header else None
+        ),
+        session_id=_identity_field(header, 5, "header.session_id"),
+        openapi_key=_identity_field(header, 6, "header.openapi_key"),
+    )
+
+
 class ShadowApplicationBootstrapOrchestrator:
     """Advance the retained dialogue only across observed response barriers.
 
-    The clean cycle emitted five batches.  ``ModelingStatusRequest`` in the
-    second batch had no required synchronous response before preparation
-    continued; readiness remains a separate live DeviceStatus gate.
+    DeviceInfo is the sole identity-binding barrier.  After it succeeds, the
+    retained captures publish ordinals 2-6 in order without inventing a barrier
+    between unbound ordinal 3 and bound ordinals 4-6.  Their exact responses
+    are correlated by operation/session identity before the operator may
+    advance.  ``ModelingStatusRequest`` ordinal 2 remains response-free;
+    readiness is a separate live DeviceStatus gate.
     """
 
-    _BATCH_ORDINALS = ((1,), (2, 3), (4, 5, 6), (7,), (8, 9, 10))
+    _BATCH_ORDINALS = ((1,), (2, 3, 4, 5, 6), (7,), (8, 9, 10))
 
     def __init__(
         self,
@@ -612,7 +683,9 @@ class ShadowApplicationBootstrapOrchestrator:
                 current_batch=min(self._batch_index + 1, len(self._BATCH_ORDINALS)),
                 total_batches=len(self._BATCH_ORDINALS),
                 batch_issued=self._batch_issued,
-                pending_response_topics=tuple(sorted(self._pending)),
+                pending_response_topics=tuple(
+                    sorted(request.response_topic for request in self._pending.values())
+                ),
                 live_binding_observed=self._binding is not None,
                 bootstrap_complete=self._complete,
             )
@@ -643,25 +716,23 @@ class ShadowApplicationBootstrapOrchestrator:
                     for ordinal in self._BATCH_ORDINALS[self._batch_index]
                 )
             pending = {
-                request.response_topic: request for request in requests if request.response_required
+                self._operation_key(request): request
+                for request in requests
+                if request.response_required
             }
-            if len(pending) != sum(request.response_required for request in requests):
-                raise ApplicationBootstrapError(
-                    "bootstrap batch contains ambiguous required response topics"
-                )
             if not pending:
                 raise ApplicationBootstrapError("bootstrap batch has no recovered response barrier")
             self._pending = pending
             self._batch_issued = True
             return requests
 
-    def accept_response(self, topic: str, payload: bytes) -> None:
+    def accept_response(self, operation_key: str, payload: bytes) -> None:
         """Correlate one required response and unlock only the next batch."""
 
         with self._lock:
             if not self._batch_issued:
                 raise ApplicationBootstrapError("no application bootstrap batch is in flight")
-            expected = self._pending.get(topic)
+            expected = self._pending.get(operation_key)
             if expected is None:
                 raise ApplicationBootstrapError(
                     "application response is not required by the current batch"
@@ -704,7 +775,7 @@ class ShadowApplicationBootstrapOrchestrator:
                         live_binding=self._binding,
                     )
 
-            del self._pending[topic]
+            del self._pending[operation_key]
             if self._pending:
                 return
             self._batch_issued = False
@@ -712,6 +783,10 @@ class ShadowApplicationBootstrapOrchestrator:
             if self._batch_index == len(self._BATCH_ORDINALS):
                 self._complete = True
 
+    @staticmethod
+    def _operation_key(request: EncodedApplicationRequest) -> str:
+        return f"bootstrap:{request.ordinal}:{request.message_type}"
+
 
 def _build_initial_device_info_request(
     authority: ApplicationControlAuthority,
diff --git a/src/k1link/device_plugins/xgrids_k1/protocol/application_mqtt.py b/src/k1link/device_plugins/xgrids_k1/protocol/application_mqtt.py
index 9362d76..06ccda0 100644
--- a/src/k1link/device_plugins/xgrids_k1/protocol/application_mqtt.py
+++ b/src/k1link/device_plugins/xgrids_k1/protocol/application_mqtt.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import hmac
 import math
 import secrets
 import threading
@@ -16,19 +17,31 @@ from paho.mqtt.reasoncodes import ReasonCode
 from k1link.device_plugins.xgrids_k1.ble.wifi_provisioning import AP_FALLBACK_IPV4
 from k1link.device_plugins.xgrids_k1.mqtt import validate_private_ipv4
 from k1link.device_plugins.xgrids_k1.protocol.application_bootstrap import (
+    DEVICE_CONFIG_REQUEST_TOPIC,
     DEVICE_CONFIG_RESPONSE_TOPIC,
+    DEVICE_INFO_REQUEST_TOPIC,
     DEVICE_INFO_RESPONSE_TOPIC,
+    GET_CLOUD_CONFIG_REQUEST_TOPIC,
     GET_CLOUD_CONFIG_RESPONSE_TOPIC,
+    GET_NTRIP_PROFILE_REQUEST_TOPIC,
     GET_NTRIP_PROFILE_RESPONSE_TOPIC,
+    GET_RTK_ADVANCE_REQUEST_TOPIC,
     GET_RTK_ADVANCE_RESPONSE_TOPIC,
+    MODELING_STATUS_REQUEST_TOPIC,
     MODELING_STATUS_RESPONSE_TOPIC,
+    ApplicationBootstrapError,
+    ApplicationMessageIdentity,
     LiveDeviceControlBinding,
+    decode_application_message_identity,
 )
 from k1link.device_plugins.xgrids_k1.protocol.application_publish import (
     OneShotPublishEnvelope,
 )
 from k1link.device_plugins.xgrids_k1.protocol.modeling_control import (
+    ModelingAction,
+    ModelingProtocolError,
     decode_device_status_report,
+    decode_modeling_response,
     decode_system_error_report,
 )
 from k1link.device_plugins.xgrids_k1.protocol.modeling_safety import (
@@ -45,6 +58,16 @@ MAX_CONTROL_MAINTAIN_SECONDS = 30.0
 MAX_CONTROL_RESPONSE_BYTES = 64 * 1024
 SYSTEM_ERROR_TOPIC = "lixel/application/report/system_error"
 
+APPLICATION_RESPONSE_TOPIC_BY_REQUEST_TOPIC = {
+    DEVICE_INFO_REQUEST_TOPIC: DEVICE_INFO_RESPONSE_TOPIC,
+    MODELING_STATUS_REQUEST_TOPIC: MODELING_STATUS_RESPONSE_TOPIC,
+    GET_RTK_ADVANCE_REQUEST_TOPIC: GET_RTK_ADVANCE_RESPONSE_TOPIC,
+    DEVICE_CONFIG_REQUEST_TOPIC: DEVICE_CONFIG_RESPONSE_TOPIC,
+    GET_NTRIP_PROFILE_REQUEST_TOPIC: GET_NTRIP_PROFILE_RESPONSE_TOPIC,
+    GET_CLOUD_CONFIG_REQUEST_TOPIC: GET_CLOUD_CONFIG_RESPONSE_TOPIC,
+    MODELING_REQUEST_TOPIC: MODELING_RESPONSE_TOPIC,
+}
+
 # The retained LixelGO control connection issued these three SUBSCRIBE packets
 # in this exact order. Point-cloud subscriptions belonged to a separate client.
 CONTROL_SUBSCRIPTION_GROUPS: tuple[tuple[tuple[str, int], ...], ...] = (
@@ -147,14 +170,60 @@ APPLICATION_REQUEST_ALLOWLIST = frozenset(
 class ApplicationMqttTransportError(RuntimeError):
     """The reviewed control transport failed before a request was attempted."""
 
+    def __init__(self, message: str, *, reason_code: str = "transport_failure") -> None:
+        super().__init__(message)
+        self.reason_code = reason_code
+
 
 class ApplicationCommandOutcomeUnknown(RuntimeError):
     """A request may have reached the K1 and must never be retried automatically."""
 
+    def __init__(
+        self,
+        message: str,
+        *,
+        reason_code: str = "command_outcome_unknown",
+    ) -> None:
+        super().__init__(message)
+        self.reason_code = reason_code
+
 
 class ApplicationControlDeviceFault(RuntimeError):
     """Live status made further automatic control inadmissible."""
 
+    def __init__(self, message: str, *, reason_code: str = "device_status_fault") -> None:
+        super().__init__(message)
+        self.reason_code = reason_code
+
+
+@dataclass(frozen=True, slots=True)
+class _ApplicationResponseExpectation:
+    operation_key: str
+    topic: str
+    identity: ApplicationMessageIdentity
+    modeling_action: ModelingAction | None = None
+
+    @property
+    def correlation_key(self) -> tuple[str, str, ModelingAction | None]:
+        return (self.topic, self.identity.session_id, self.modeling_action)
+
+    def matches(
+        self,
+        observed: ApplicationMessageIdentity,
+        observed_modeling_action: ModelingAction | None,
+    ) -> bool:
+        if self.modeling_action is not observed_modeling_action:
+            return False
+        if not hmac.compare_digest(self.identity.session_id, observed.session_id):
+            return False
+        if not hmac.compare_digest(self.identity.openapi_key, observed.openapi_key):
+            return False
+        expected_device_id = self.identity.vendor_device_id
+        return expected_device_id is None or (
+            observed.vendor_device_id is not None
+            and hmac.compare_digest(expected_device_id, observed.vendor_device_id)
+        )
+
 
 @dataclass(frozen=True, slots=True)
 class ApplicationMqttTransportSnapshot:
@@ -165,6 +234,7 @@ class ApplicationMqttTransportSnapshot:
     qos2_completions: int
     correlated_responses: int
     ignored_known_responses: int
+    late_known_responses: int
     device_status_reports: int
     system_error_reports: int
     report_decode_errors: int
@@ -189,6 +259,7 @@ class ApplicationMqttTransportSnapshot:
             "qos2_completions": self.qos2_completions,
             "correlated_responses": self.correlated_responses,
             "ignored_known_responses": self.ignored_known_responses,
+            "late_known_responses": self.late_known_responses,
             "device_status_reports": self.device_status_reports,
             "system_error_reports": self.system_error_reports,
             "report_decode_errors": self.report_decode_errors,
@@ -208,10 +279,10 @@ class ApplicationMqttTransportSnapshot:
 class ReviewedApplicationMqttTransport:
     """Exact-profile MQTT exchange for an operator-present physical acceptance.
 
-    This type is deliberately not installed in the facade or plugin runtime.
-    It performs one connection attempt, never reconnects, consumes every
-    operation key before calling ``publish``, and permanently poisons itself
-    after any unknown post-publish outcome.
+    Plugin v0.5.0 installs this type only behind the operator-driven continuous
+    session owner. It performs one connection attempt, never reconnects,
+    consumes every operation key before calling ``publish``, and permanently
+    poisons itself after any unknown post-publish outcome.
     """
 
     def __init__(
@@ -252,12 +323,19 @@ class ReviewedApplicationMqttTransport:
         self._messages: deque[tuple[str, bytes]] = deque()
         self._callback_error: str | None = None
         self._consumed_operation_keys: set[str] = set()
+        self._known_response_expectations: dict[str, _ApplicationResponseExpectation] = {}
+        self._response_operations_by_correlation: dict[
+            tuple[str, str, ModelingAction | None], list[str]
+        ] = {}
+        self._optional_response_operations: set[str] = set()
+        self._observed_response_operations: set[str] = set()
         self._connect_attempts = 0
         self._subscribe_attempts = 0
         self._publish_attempts = 0
         self._qos2_completions = 0
         self._correlated_responses = 0
         self._ignored_known_responses = 0
+        self._late_known_responses = 0
         self._device_status_reports = 0
         self._system_error_reports = 0
         self._report_decode_errors = 0
@@ -273,10 +351,14 @@ class ReviewedApplicationMqttTransport:
     def open(self) -> ApplicationMqttTransportSnapshot:
         with self._lock:
             if self._state != "new":
-                raise ApplicationMqttTransportError("control transport can be opened only once")
+                raise ApplicationMqttTransportError(
+                    "control transport can be opened only once",
+                    reason_code="transport_already_opened",
+                )
             self._state = "connecting"
             self._connect_attempts = 1
         client = self._new_client()
+        client.connect_timeout = self._connect_timeout_seconds
         self._install_callbacks(client)
         self._client = client
         try:
@@ -300,10 +382,10 @@ class ReviewedApplicationMqttTransport:
         self,
         envelopes: Sequence[OneShotPublishEnvelope],
         *,
-        required_response_topics: Collection[str],
+        required_response_operation_keys: Collection[str],
     ) -> dict[str, bytes]:
         batch = tuple(envelopes)
-        required = frozenset(required_response_topics)
+        required = frozenset(required_response_operation_keys)
         if not batch:
             raise ValueError("control exchange batch must not be empty")
         if not required and any(
@@ -311,37 +393,100 @@ class ReviewedApplicationMqttTransport:
             for envelope in batch
         ):
             raise ValueError("response-free exchange is limited to retained ModelingStatus reads")
-        if not required <= APPLICATION_RESPONSE_TOPICS:
-            raise ValueError("required response topics exceed the reviewed allowlist")
         operation_keys = tuple(envelope.operation_key for envelope in batch)
         if len(set(operation_keys)) != len(operation_keys):
             raise ValueError("control exchange batch repeats an operation key")
+        if not required <= frozenset(operation_keys):
+            raise ValueError("required responses exceed the issued operation keys")
         if any(envelope.topic not in APPLICATION_REQUEST_ALLOWLIST for envelope in batch):
             raise ValueError("control exchange batch exceeds the reviewed request allowlist")
-        allowed_non_barrier_responses = (
-            frozenset({MODELING_STATUS_RESPONSE_TOPIC})
-            if any(
-                envelope.topic == "lixel/application/request/modeling_status" for envelope in batch
+        expectations = tuple(self._expectation_for_envelope(envelope) for envelope in batch)
+        pending = {
+            expectation.correlation_key: expectation
+            for expectation in expectations
+            if expectation.operation_key in required
+        }
+        if len(pending) != len(required):
+            raise ValueError(
+                "required responses do not identify one exact batch operation each"
             )
-            else frozenset()
-        )
+
+        # Classify packets already delivered by the manual Paho loop before
+        # consuming this batch. An exact response to an earlier issued
+        # operation is harmless; an unknown session/identity remains fatal.
+        self._drain_responses({}, {})
+        if self._consumed_operation_keys:
+            # Service packets already readable on the retained socket before
+            # admitting another operation.  This is a zero-wait network pump,
+            # not a timer or retry; it prevents a queued protocol deviation
+            # from being hidden behind the next explicit operator action.
+            self._service_once(post_publish=True)
+            self._drain_responses({}, {})
 
         with self._lock:
             if self._consumed_operation_keys.intersection(operation_keys):
                 raise ApplicationCommandOutcomeUnknown(
-                    "control operation key was already consumed; retry is forbidden"
+                    "control operation key was already consumed; retry is forbidden",
+                    reason_code="operation_reuse_forbidden",
                 )
             if self._state != "ready" or not self._connected or not self._subscribed:
-                raise ApplicationMqttTransportError("control transport is not ready")
-            stale_response = bool(self._messages)
-            if stale_response:
-                self._poison_locked("stale response preceded the request batch")
+                raise ApplicationMqttTransportError(
+                    "control transport is not ready",
+                    reason_code="transport_not_ready",
+                )
+            for expectation in expectations:
+                existing_operations = self._response_operations_by_correlation.get(
+                    expectation.correlation_key,
+                    [],
+                )
+                if any(
+                    not self._known_response_expectations[operation_key].matches(
+                        expectation.identity,
+                        expectation.modeling_action,
+                    )
+                    for operation_key in existing_operations
+                ):
+                    raise ApplicationCommandOutcomeUnknown(
+                        "control response identity changed for an issued session",
+                        reason_code="response_identity_changed",
+                    )
+                if expectation.operation_key in required:
+                    # A response-free read owns its correlation only until the
+                    # next exact same-identity operation is admitted.  We have
+                    # already drained callbacks and given the retained socket
+                    # one zero-wait service turn above, so any response already
+                    # available for the optional operation has been observed.
+                    # Once the newer required operation is issued, the first
+                    # response after that issuance belongs to the newer
+                    # operation; the unanswered optional read must not reserve
+                    # FIFO ownership and swallow it.
+                    superseded_optional = {
+                        operation_key
+                        for operation_key in existing_operations
+                        if operation_key in self._optional_response_operations
+                        and operation_key not in self._observed_response_operations
+                    }
+                    if superseded_optional:
+                        existing_operations[:] = [
+                            operation_key
+                            for operation_key in existing_operations
+                            if operation_key not in superseded_optional
+                        ]
+                        self._optional_response_operations.difference_update(
+                            superseded_optional
+                        )
+                        for operation_key in superseded_optional:
+                            del self._known_response_expectations[operation_key]
+                self._known_response_expectations[
+                    expectation.operation_key
+                ] = expectation
+                self._response_operations_by_correlation.setdefault(
+                    expectation.correlation_key,
+                    [],
+                ).append(expectation.operation_key)
+                if expectation.operation_key not in required:
+                    self._optional_response_operations.add(expectation.operation_key)
             self._consumed_operation_keys.update(operation_keys)
-        if stale_response:
-            self.close()
-            raise ApplicationCommandOutcomeUnknown(
-                "stale control response makes the next command outcome ambiguous"
-            )
 
         client = self._require_client()
         publish_mids: set[int] = set()
@@ -367,12 +512,17 @@ class ReviewedApplicationMqttTransport:
         deadline = self._monotonic() + self._exchange_timeout_seconds
 
         def complete() -> bool:
-            self._drain_responses(required, allowed_non_barrier_responses, responses)
+            self._drain_responses(pending, responses)
             with self._lock:
                 return publish_mids <= self._completed_publish_mids and required <= responses.keys()
 
         self._drive_until(complete, deadline, post_publish=True)
-        self._drain_responses(required, allowed_non_barrier_responses, responses)
+        # The completion predicate can become true immediately after the first
+        # required response callback.  Give an already-readable second packet
+        # one zero-wait service turn so a duplicate application response fails
+        # closed instead of leaking into the next operator checkpoint.
+        self._service_once(post_publish=True)
+        self._drain_responses(pending, responses)
         with self._lock:
             self._correlated_responses += len(responses)
         return responses
@@ -422,9 +572,15 @@ class ReviewedApplicationMqttTransport:
             client = self._client
         if client is not None:
             try:
-                if self._subscribed:
+                with self._lock:
+                    accepted_group_count = self._subscription_group_index
+                if accepted_group_count:
                     client.unsubscribe(
-                        [topic for group in CONTROL_SUBSCRIPTION_GROUPS for topic, _qos in group]
+                        [
+                            topic
+                            for group in CONTROL_SUBSCRIPTION_GROUPS[:accepted_group_count]
+                            for topic, _qos in group
+                        ]
                     )
                 client.disconnect()
             except (OSError, RuntimeError, ValueError):
@@ -483,6 +639,7 @@ class ReviewedApplicationMqttTransport:
                 qos2_completions=self._qos2_completions,
                 correlated_responses=self._correlated_responses,
                 ignored_known_responses=self._ignored_known_responses,
+                late_known_responses=self._late_known_responses,
                 device_status_reports=self._device_status_reports,
                 system_error_reports=self._system_error_reports,
                 report_decode_errors=self._report_decode_errors,
@@ -725,48 +882,144 @@ class ReviewedApplicationMqttTransport:
                     self._fail_after_publish("control MQTT network loop returned an error")
                 self._fail_before_publish("control MQTT network loop returned an error")
 
+    def _service_once(self, *, post_publish: bool) -> None:
+        with self._lock:
+            callback_error = self._callback_error
+        if callback_error is not None:
+            if post_publish:
+                self._fail_after_publish(callback_error)
+            self._fail_before_publish(callback_error)
+        client = self._require_client()
+        try:
+            result = client.loop(timeout=0.0)
+        except (OSError, RuntimeError, ValueError) as exc:
+            if post_publish:
+                self._fail_after_publish("control MQTT network loop failed", exc)
+            self._fail_before_publish("control MQTT network loop failed", exc)
+        if result != mqtt.MQTT_ERR_SUCCESS:
+            if post_publish:
+                self._fail_after_publish("control MQTT network loop returned an error")
+            self._fail_before_publish("control MQTT network loop returned an error")
+
     def _drain_responses(
         self,
-        required: frozenset[str],
-        allowed_non_barrier: frozenset[str],
+        pending: dict[
+            tuple[str, str, ModelingAction | None],
+            _ApplicationResponseExpectation,
+        ],
         responses: dict[str, bytes],
     ) -> None:
         ambiguous_message: str | None = None
+        ambiguous_reason_code: str | None = None
         with self._lock:
             while self._messages:
                 topic, payload = self._messages.popleft()
-                if topic not in required:
-                    if topic in allowed_non_barrier:
-                        self._ignored_known_responses += 1
-                        continue
-                    self._poison_locked("unexpected response made correlation ambiguous")
-                    ambiguous_message = "unexpected control response made command outcome ambiguous"
+                try:
+                    observed = decode_application_message_identity(payload)
+                except ApplicationBootstrapError:
+                    self._poison_locked("response identity decoding failed")
+                    ambiguous_message = (
+                        "control response identity could not be decoded safely"
+                    )
+                    ambiguous_reason_code = "response_identity_decode_failed"
                     break
-                if topic in responses:
-                    self._poison_locked("duplicate required response made correlation ambiguous")
-                    ambiguous_message = "duplicate control response made command outcome ambiguous"
-                    break
-                responses[topic] = payload
-        if ambiguous_message is not None:
-            self.close()
-            raise ApplicationCommandOutcomeUnknown(ambiguous_message)
-
-    def _discard_allowed_responses(self, allowed: frozenset[str]) -> None:
-        ambiguous_message: str | None = None
-        with self._lock:
-            while self._messages:
-                topic, _payload = self._messages.popleft()
-                if topic in allowed:
-                    self._ignored_known_responses += 1
-                    continue
-                self._poison_locked("unexpected response during retained control hold")
-                ambiguous_message = (
-                    "unexpected control response during retained control-session hold"
+                observed_modeling_action: ModelingAction | None = None
+                if topic == MODELING_RESPONSE_TOPIC:
+                    try:
+                        observed_modeling_action = decode_modeling_response(
+                            payload
+                        ).action
+                    except ModelingProtocolError:
+                        self._poison_locked("modeling response action decoding failed")
+                        ambiguous_message = (
+                            "control modeling response could not be decoded safely"
+                        )
+                        ambiguous_reason_code = "modeling_response_decode_failed"
+                        break
+                key = (topic, observed.session_id, observed_modeling_action)
+                expectation = pending.get(key)
+                known_operations = self._response_operations_by_correlation.get(key, [])
+                matching_operations = [
+                    operation_key
+                    for operation_key in known_operations
+                    if self._known_response_expectations[operation_key].matches(
+                        observed,
+                        observed_modeling_action,
+                    )
+                ]
+                next_unobserved = next(
+                    (
+                        operation_key
+                        for operation_key in matching_operations
+                        if operation_key not in self._observed_response_operations
+                    ),
+                    None,
                 )
+                if next_unobserved is not None:
+                    self._observed_response_operations.add(next_unobserved)
+                    if (
+                        expectation is not None
+                        and expectation.operation_key == next_unobserved
+                    ):
+                        responses[next_unobserved] = payload
+                        continue
+                    self._ignored_known_responses += 1
+                    self._late_known_responses += 1
+                    continue
+                if matching_operations:
+                    self._poison_locked("duplicate application response")
+                    ambiguous_message = (
+                        "duplicate application response made command outcome ambiguous"
+                    )
+                    ambiguous_reason_code = "duplicate_application_response"
+                    break
+                self._poison_locked("unexpected response identity made correlation ambiguous")
+                ambiguous_message = (
+                    "unexpected control response session or identity made command outcome ambiguous"
+                )
+                ambiguous_reason_code = "unexpected_response_identity"
+                if expectation is not None or known_operations:
+                    ambiguous_message = (
+                        "control response identity mismatch made command outcome ambiguous"
+                    )
+                    ambiguous_reason_code = "response_identity_mismatch"
                 break
         if ambiguous_message is not None:
             self.close()
-            raise ApplicationCommandOutcomeUnknown(ambiguous_message)
+            raise ApplicationCommandOutcomeUnknown(
+                ambiguous_message,
+                reason_code=ambiguous_reason_code or "response_correlation_failed",
+            )
+
+    def _discard_allowed_responses(self, allowed: frozenset[str]) -> None:
+        del allowed
+        self._drain_responses({}, {})
+
+    @staticmethod
+    def _expectation_for_envelope(
+        envelope: OneShotPublishEnvelope,
+    ) -> _ApplicationResponseExpectation:
+        response_topic = APPLICATION_RESPONSE_TOPIC_BY_REQUEST_TOPIC.get(envelope.topic)
+        if response_topic is None:
+            raise ValueError("control request has no reviewed response topic")
+        try:
+            identity = decode_application_message_identity(envelope.payload)
+        except ApplicationBootstrapError as exc:
+            raise ValueError("control request identity is not decodable") from exc
+        modeling_action: ModelingAction | None = None
+        if response_topic == MODELING_RESPONSE_TOPIC:
+            if envelope.operation_key == "modeling:start":
+                modeling_action = ModelingAction.START
+            elif envelope.operation_key == "modeling:stop":
+                modeling_action = ModelingAction.STOP
+            else:
+                raise ValueError("modeling request operation key has no exact action")
+        return _ApplicationResponseExpectation(
+            operation_key=envelope.operation_key,
+            topic=response_topic,
+            identity=identity,
+            modeling_action=modeling_action,
+        )
 
     def _set_callback_error(self, message: str) -> None:
         with self._lock:
@@ -777,7 +1030,10 @@ class ReviewedApplicationMqttTransport:
         with self._lock:
             self._state = "failed"
         self.close()
-        error = ApplicationMqttTransportError(message)
+        error = ApplicationMqttTransportError(
+            message,
+            reason_code=self._transport_failure_reason_code(message),
+        )
         if cause is not None:
             raise error from cause
         raise error
@@ -787,7 +1043,8 @@ class ReviewedApplicationMqttTransport:
             self._poison_locked(message)
         self.close()
         error = ApplicationCommandOutcomeUnknown(
-            f"{message}; automatic retry is forbidden until physical/status reconciliation"
+            f"{message}; automatic retry is forbidden until physical/status reconciliation",
+            reason_code=self._transport_failure_reason_code(message),
         )
         if cause is not None:
             raise error from cause
@@ -799,5 +1056,33 @@ class ReviewedApplicationMqttTransport:
     def _require_client(self) -> mqtt.Client:
         client = self._client
         if client is None:
-            raise ApplicationMqttTransportError("control MQTT client is not installed")
+            raise ApplicationMqttTransportError(
+                "control MQTT client is not installed",
+                reason_code="mqtt_client_unavailable",
+            )
         return client
+
+    @staticmethod
+    def _transport_failure_reason_code(message: str) -> str:
+        reason_fragments = (
+            ("connect call failed", "mqtt_connect_call_failed"),
+            ("connect call was rejected", "mqtt_connect_rejected"),
+            ("broker rejected connection", "mqtt_broker_rejected_connection"),
+            ("connection/subscription timed out", "mqtt_connection_timeout"),
+            ("response subscription", "mqtt_subscription_failed"),
+            ("SUBACK", "mqtt_subscription_protocol_error"),
+            ("publish call failed", "mqtt_publish_call_failed"),
+            ("publish call returned", "mqtt_publish_result_unsafe"),
+            ("reused a packet identifier", "mqtt_packet_identifier_reused"),
+            ("QoS2 transaction failed", "mqtt_qos2_failed"),
+            ("response barrier timed out", "mqtt_response_timeout"),
+            ("network loop failed", "mqtt_network_loop_failed"),
+            ("network loop returned", "mqtt_network_loop_failed"),
+            ("connection ended unexpectedly", "mqtt_connection_ended"),
+            ("unreviewed subscribed topic", "mqtt_unreviewed_topic"),
+            ("response exceeds", "mqtt_response_too_large"),
+        )
+        return next(
+            (code for fragment, code in reason_fragments if fragment in message),
+            "mqtt_transport_failure",
+        )
diff --git a/src/k1link/device_plugins/xgrids_k1/protocol/application_session.py b/src/k1link/device_plugins/xgrids_k1/protocol/application_session.py
index 04cda95..a1e57ec 100644
--- a/src/k1link/device_plugins/xgrids_k1/protocol/application_session.py
+++ b/src/k1link/device_plugins/xgrids_k1/protocol/application_session.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import logging
 import threading
 import time
 from collections.abc import Callable
@@ -57,6 +58,8 @@ ApplicationControlPhase = Literal[
     "failed",
 ]
 
+logger = logging.getLogger(__name__)
+
 
 TransportFactory = Callable[[str], ReviewedApplicationMqttTransport]
 
@@ -108,7 +111,6 @@ class InteractiveApplicationControlSession:
         self._project_requested = threading.Event()
         self._start_requested = threading.Event()
         self._stop_requested = threading.Event()
-        self._standby_confirmed = threading.Event()
         self._cancel_requested = False
         self._start_confirmation: OperatorPresenceConfirmation | None = None
         self._stop_confirmation: OperatorPresenceConfirmation | None = None
@@ -117,6 +119,7 @@ class InteractiveApplicationControlSession:
         self._dialogue_snapshot: dict[str, object] | None = None
         self._transport_snapshot: dict[str, object] | None = None
         self._outcome_unknown = False
+        self._run_generation = 0
 
     def open(
         self,
@@ -128,21 +131,28 @@ class InteractiveApplicationControlSession:
         # Validate every explicit confirmation before creating a network owner.
         confirmation.checklist(ModelingAction.START)
         with self._lock:
-            if self._phase in {"completed", "closed"} or (
-                self._phase == "failed"
-                and self._failure is not None
-                and self._failure.get("safe_to_retry") is True
-            ):
+            if self._phase != "idle" and self._can_open_locked():
                 self._reset_locked()
             if self._phase != "idle":
                 raise ApplicationAcceptanceError(
                     "application control session is already open or requires manual recovery"
                 )
+            # A previous worker may already have published a terminal phase but
+            # still own its local MQTT socket while its ``finally`` block runs.
+            # Never create the next network owner until that thread has exited
+            # and cleared the closed transport.
+            if not self._worker_retired_locked():
+                raise ApplicationAcceptanceError(
+                    "previous application control worker is still retiring"
+                )
             self._host = host
             self._timezone_name = timezone_name
             self._set_phase_locked("connecting")
+            self._run_generation += 1
+            generation = self._run_generation
             self._thread = threading.Thread(
                 target=self._run,
+                args=(generation,),
                 name="xgrids-k1-canonical-control",
                 daemon=True,
             )
@@ -189,16 +199,6 @@ class InteractiveApplicationControlSession:
             self._stop_requested.set()
         return self.snapshot()
 
-    def confirm_standby(self) -> dict[str, object]:
-        with self._lock:
-            self._require_phase_locked("awaiting-standby-confirmation")
-            if not self._device_ready_for_standby_confirmation_locked():
-                raise ApplicationAcceptanceError(
-                    "K1 has not reported unbound READY after canonical STOP"
-                )
-            self._standby_confirmed.set()
-        return self.snapshot()
-
     def close_prestart(self) -> dict[str, object]:
         with self._lock:
             if self._phase not in {
@@ -234,33 +234,27 @@ class InteractiveApplicationControlSession:
             return {
                 "mode": "interactive-canonical",
                 "state": phase,
-                "control_socket_open": phase
-                not in {"idle", "completed", "closed", "failed"},
-                "can_open": phase in {"idle", "completed", "closed"}
-                or (
-                    phase == "failed"
-                    and self._failure is not None
-                    and self._failure.get("safe_to_retry") is True
-                ),
+                "control_socket_open": phase not in {"idle", "completed", "closed", "failed"},
+                "can_open": self._can_open_locked(),
                 "can_enter_workspace": phase == "connection-ready",
                 "can_prepare_project": phase == "workspace-ready",
                 "can_start": phase == "project-ready",
                 "can_stop": phase == "scanning",
-                "can_confirm_standby": self._device_ready_for_standby_confirmation_locked(),
+                # Retained for wire compatibility with the v1alpha2 snapshot.
+                # Standby is now concluded solely from live K1 protocol state.
+                "can_confirm_standby": False,
                 "pending_operator_action": self._pending_operator_action_locked(),
                 "scripted_transitions": False,
                 "automatic_retry": False,
                 "outcome_unknown": self._outcome_unknown,
                 "failure": dict(self._failure) if self._failure is not None else None,
                 "dialogue": (
-                    dict(self._dialogue_snapshot)
-                    if self._dialogue_snapshot is not None
-                    else None
+                    dict(self._dialogue_snapshot) if self._dialogue_snapshot is not None else None
                 ),
                 "transport": transport_snapshot,
             }
 
-    def _run(self) -> None:
+    def _run(self, generation: int) -> None:
         executor: PhysicalAcceptanceDialogueExecutor | None = None
         transport: ReviewedApplicationMqttTransport | None = None
         try:
@@ -319,64 +313,195 @@ class InteractiveApplicationControlSession:
 
             executor.maintain_active_until_stop_requested(self._stop_requested.is_set)
             stop_confirmation = self._stop_request()
-            stop_permit = PhysicalAcceptancePermit(
-                stop_confirmation.checklist(ModelingAction.STOP)
-            )
+            stop_permit = PhysicalAcceptancePermit(stop_confirmation.checklist(ModelingAction.STOP))
             self._set_phase("stopping")
             executor.execute_canonical_stop(
                 self._stop_command(authority, binding),
                 stop_permit,
             )
             self._set_phase("awaiting-standby-confirmation")
-            executor.maintain_post_stop_until_standby_confirmed(
-                self._standby_confirmed.is_set
-            )
+            executor.maintain_post_stop_until_standby()
             self._set_phase("completed")
         except Exception as exc:
+            dialogue_snapshot, dialogue_snapshot_available = self._executor_snapshot_safely(
+                executor
+            )
+            transport_snapshot, transport_snapshot_available = self._transport_snapshot_safely(
+                transport
+            )
             with self._lock:
                 if self._cancel_requested:
                     self._set_phase_locked("closed")
                 else:
-                    publish_attempts = 0
-                    if transport is not None:
-                        observed_attempts = transport.snapshot().as_dict().get(
-                            "publish_attempts",
-                            0,
+                    failed_phase = self._phase
+                    transport_created = transport is not None
+                    dialogue_executor_created = executor is not None
+                    publish_attempts = (
+                        self._json_int_or_none(transport_snapshot.get("publish_attempts"))
+                        if transport_snapshot_available
+                        else None
+                    )
+                    dialogue_stage = self._json_string(dialogue_snapshot.get("dialogue_stage"))
+                    correlation_failure = dialogue_snapshot.get("correlation_failure")
+                    compatibility_failure = dialogue_snapshot.get("compatibility_failure")
+                    failure_reason_code = self._failure_reason_code(
+                        exc,
+                        correlation_failure=correlation_failure,
+                    )
+                    modeling_command_attempted: bool | None = (
+                        (
+                            dialogue_snapshot.get("start_attempted") is True
+                            or dialogue_snapshot.get("stop_attempted") is True
                         )
-                        if isinstance(observed_attempts, int) and not isinstance(
-                            observed_attempts,
-                            bool,
-                        ):
-                            publish_attempts = observed_attempts
-                    outcome_unknown = isinstance(
-                        exc, ApplicationCommandOutcomeUnknown
-                    ) or self._phase in {
-                        "start-requested",
-                        "initializing",
-                        "scanning",
-                        "stop-requested",
-                        "stopping",
-                        "awaiting-standby-confirmation",
-                    }
+                        if dialogue_snapshot_available
+                        else (False if not dialogue_executor_created else None)
+                    )
+                    diagnostic_snapshot_unavailable = [
+                        component
+                        for component, created, available in (
+                            (
+                                "transport",
+                                transport_created,
+                                transport_snapshot_available,
+                            ),
+                            (
+                                "dialogue",
+                                dialogue_executor_created,
+                                dialogue_snapshot_available,
+                            ),
+                        )
+                        if created and not available
+                    ]
+                    diagnostic_evidence_unavailable = [
+                        evidence
+                        for evidence, unavailable in (
+                            (
+                                "transport.publish_attempts",
+                                transport_created and publish_attempts is None,
+                            ),
+                            (
+                                "dialogue.modeling_command_attempted",
+                                dialogue_executor_created and modeling_command_attempted is None,
+                            ),
+                        )
+                        if unavailable
+                    ]
+                    outcome_unknown = (
+                        isinstance(exc, ApplicationCommandOutcomeUnknown)
+                        or modeling_command_attempted is True
+                        or bool(diagnostic_evidence_unavailable)
+                        or failed_phase
+                        in {
+                            "scanning",
+                            "stop-requested",
+                            "stopping",
+                            "awaiting-standby-confirmation",
+                        }
+                    )
+                    # A correlated ordinal-1 DeviceInfo profile mismatch is a
+                    # completed read-only exchange. It cannot have started or
+                    # stopped modeling, so a later explicit operator click may
+                    # open a fresh dialogue after the software/profile issue is
+                    # corrected. No other post-publish failure is promoted.
+                    correlated_read_only_profile_mismatch = (
+                        failure_reason_code == "compatibility_profile_mismatch"
+                        and modeling_command_attempted is False
+                        and publish_attempts == 1
+                        and self._json_int_or_none(
+                            transport_snapshot.get("correlated_responses")
+                        )
+                        == 1
+                    )
+                    safe_to_retry = not outcome_unknown and (
+                        not transport_created
+                        or (transport_snapshot_available and publish_attempts == 0)
+                        or correlated_read_only_profile_mismatch
+                    )
                     self._failure = {
                         "code": type(exc).__name__,
+                        "reason_code": failure_reason_code,
                         "message": str(exc),
-                        "safe_to_retry": publish_attempts == 0 and not outcome_unknown,
+                        "failed_phase": failed_phase,
+                        "dialogue_stage": dialogue_stage,
+                        "transport_state": self._json_string(transport_snapshot.get("state")),
+                        "publish_attempts": publish_attempts,
+                        "qos2_completions": self._json_int_or_none(
+                            transport_snapshot.get("qos2_completions")
+                        ),
+                        "correlated_responses": self._json_int_or_none(
+                            transport_snapshot.get("correlated_responses")
+                        ),
+                        "ignored_known_responses": self._json_int_or_none(
+                            transport_snapshot.get("ignored_known_responses")
+                        ),
+                        "late_known_responses": self._json_int_or_none(
+                            transport_snapshot.get("late_known_responses")
+                        ),
+                        "modeling_command_attempted": modeling_command_attempted,
+                        "diagnostic_snapshot_unavailable": (diagnostic_snapshot_unavailable),
+                        "diagnostic_evidence_unavailable": (diagnostic_evidence_unavailable),
+                        "correlation_failure": (
+                            dict(correlation_failure)
+                            if isinstance(correlation_failure, dict)
+                            else None
+                        ),
+                        "compatibility_failure": (
+                            dict(compatibility_failure)
+                            if isinstance(compatibility_failure, dict)
+                            else None
+                        ),
+                        "safe_to_retry": safe_to_retry,
                     }
                     self._outcome_unknown = outcome_unknown
+                    self._dialogue_snapshot = dialogue_snapshot or None
+                    self._transport_snapshot = transport_snapshot or None
                     self._set_phase_locked("failed")
+                    logger.error(
+                        "K1 application control session failed: code=%s reason_code=%s "
+                        "phase=%s dialogue_stage=%s transport_state=%s "
+                        "publish_attempts=%s modeling_command_attempted=%s "
+                        "diagnostic_snapshot_unavailable=%s "
+                        "diagnostic_evidence_unavailable=%s outcome_unknown=%s "
+                        "safe_to_retry=%s",
+                        type(exc).__name__,
+                        failure_reason_code,
+                        failed_phase,
+                        dialogue_stage,
+                        self._json_string(transport_snapshot.get("state")),
+                        publish_attempts,
+                        modeling_command_attempted,
+                        diagnostic_snapshot_unavailable,
+                        diagnostic_evidence_unavailable,
+                        outcome_unknown,
+                        safe_to_retry,
+                    )
         finally:
+            final_dialogue_snapshot: dict[str, object] | None = None
+            final_transport_snapshot: dict[str, object] | None = None
             if executor is not None:
-                with self._lock:
-                    self._dialogue_snapshot = executor.snapshot()
+                captured_dialogue, dialogue_available = self._executor_snapshot_safely(executor)
+                if dialogue_available:
+                    final_dialogue_snapshot = captured_dialogue
             if transport is not None:
                 try:
-                    with self._lock:
-                        self._transport_snapshot = transport.snapshot().as_dict()
+                    captured_transport, transport_available = self._transport_snapshot_safely(
+                        transport
+                    )
+                    if transport_available:
+                        final_transport_snapshot = captured_transport
                 finally:
                     transport.close()
             with self._lock:
-                self._transport = None
+                # The generation guard remains defense in depth for shutdown
+                # races, although open() also requires the prior worker to be
+                # fully retired before a new generation can be created.
+                if generation == self._run_generation:
+                    if final_dialogue_snapshot is not None:
+                        self._dialogue_snapshot = final_dialogue_snapshot
+                    if final_transport_snapshot is not None:
+                        self._transport_snapshot = final_transport_snapshot
+                    if self._transport is transport:
+                        self._transport = None
 
     @staticmethod
     def _start_command(
@@ -427,6 +552,62 @@ class InteractiveApplicationControlSession:
         with self._lock:
             self._set_phase_locked(phase)
 
+    @staticmethod
+    def _executor_snapshot_safely(
+        executor: PhysicalAcceptanceDialogueExecutor | None,
+    ) -> tuple[dict[str, object], bool]:
+        if executor is None:
+            return {}, False
+        try:
+            return dict(executor.snapshot()), True
+        except Exception:
+            logger.error("K1 application dialogue snapshot failed")
+            return {}, False
+
+    @staticmethod
+    def _transport_snapshot_safely(
+        transport: ReviewedApplicationMqttTransport | None,
+    ) -> tuple[dict[str, object], bool]:
+        if transport is None:
+            return {}, False
+        try:
+            return dict(transport.snapshot().as_dict()), True
+        except Exception:
+            logger.error("K1 application transport snapshot failed")
+            return {}, False
+
+    @staticmethod
+    def _json_int_or_none(value: object) -> int | None:
+        return value if isinstance(value, int) and not isinstance(value, bool) else None
+
+    @staticmethod
+    def _json_string(value: object) -> str | None:
+        return value if isinstance(value, str) else None
+
+    @staticmethod
+    def _failure_reason_code(
+        exc: Exception,
+        *,
+        correlation_failure: object,
+    ) -> str:
+        explicit = getattr(exc, "reason_code", None)
+        if isinstance(explicit, str) and explicit:
+            return explicit
+        if isinstance(correlation_failure, dict):
+            correlated = correlation_failure.get("reason_code")
+            if isinstance(correlated, str) and correlated:
+                return correlated
+        exception_name = type(exc).__name__
+        if "Authority" in exception_name or "Keychain" in exception_name:
+            return "application_authority_unavailable"
+        if isinstance(exc, TimeoutError):
+            return "control_checkpoint_timeout"
+        if isinstance(exc, ApplicationAcceptanceError):
+            return "application_acceptance_failed"
+        if isinstance(exc, RuntimeError):
+            return "unexpected_runtime_error"
+        return "internal_control_error"
+
     def _set_phase_locked(self, phase: ApplicationControlPhase) -> None:
         self._phase = phase
 
@@ -436,18 +617,17 @@ class InteractiveApplicationControlSession:
                 f"control action requires {expected}; current state is {self._phase}"
             )
 
-    def _device_ready_for_standby_confirmation_locked(self) -> bool:
-        if self._phase != "awaiting-standby-confirmation":
-            return False
-        snapshot = self._live_transport_snapshot_locked()
-        return (
-            snapshot.get("latest_device_session_state") == "ready"
-            and snapshot.get("latest_device_project_bound") is False
-        )
-
     def _live_transport_snapshot_locked(self) -> dict[str, object]:
         if self._transport is not None:
-            return self._transport.snapshot().as_dict()
+            snapshot, available = self._transport_snapshot_safely(self._transport)
+            if available:
+                return snapshot
+            return {
+                "state": "snapshot-unavailable",
+                "diagnostic_snapshot_available": False,
+                "automatic_retry": False,
+                "automatic_reconnect": False,
+            }
         return (
             dict(self._transport_snapshot)
             if self._transport_snapshot is not None
@@ -464,9 +644,20 @@ class InteractiveApplicationControlSession:
             "workspace-ready": "prepare-project",
             "project-ready": "start",
             "scanning": "stop",
-            "awaiting-standby-confirmation": "confirm-steady-green",
         }.get(self._phase)
 
+    def _can_open_locked(self) -> bool:
+        reopenable_phase = self._phase in {"idle", "completed", "closed"} or (
+            self._phase == "failed"
+            and self._failure is not None
+            and self._failure.get("safe_to_retry") is True
+        )
+        return reopenable_phase and self._worker_retired_locked()
+
+    def _worker_retired_locked(self) -> bool:
+        thread = self._thread
+        return (thread is None or not thread.is_alive()) and self._transport is None
+
     def _reset_locked(self) -> None:
         self._phase = "idle"
         self._host = None
@@ -477,7 +668,6 @@ class InteractiveApplicationControlSession:
         self._project_requested = threading.Event()
         self._start_requested = threading.Event()
         self._stop_requested = threading.Event()
-        self._standby_confirmed = threading.Event()
         self._cancel_requested = False
         self._start_confirmation = None
         self._stop_confirmation = None
diff --git a/src/k1link/device_plugins/xgrids_k1/protocol/modeling_safety.py b/src/k1link/device_plugins/xgrids_k1/protocol/modeling_safety.py
index 79399ad..5083fdb 100644
--- a/src/k1link/device_plugins/xgrids_k1/protocol/modeling_safety.py
+++ b/src/k1link/device_plugins/xgrids_k1/protocol/modeling_safety.py
@@ -6,6 +6,7 @@ from dataclasses import dataclass, field
 from typing import Literal
 
 from k1link.device_plugins.xgrids_k1.protocol.application_bootstrap import (
+    REVIEWED_PROFILE_ATTESTATION_FAILURE,
     ApplicationControlAuthority,
     LiveDeviceControlBinding,
 )
@@ -217,9 +218,7 @@ class LiveModelingControlSafety:
                     "DeviceInfo binding does not match the live K1 status stream"
                 )
             if not binding.ready_for_reviewed_profile:
-                raise ModelingControlSafetyError(
-                    "live DeviceInfo does not attest the reviewed activated FW 3.0.2 profile"
-                )
+                raise ModelingControlSafetyError(REVIEWED_PROFILE_ATTESTATION_FAILURE)
             if report.session_state is not required_state:
                 raise ModelingControlSafetyError(
                     f"live K1 must be {required_state.name.casefold()} for this shadow plan"
diff --git a/src/k1link/device_plugins/xgrids_k1/protocol/protobuf_wire.py b/src/k1link/device_plugins/xgrids_k1/protocol/protobuf_wire.py
index 84911cd..328db83 100644
--- a/src/k1link/device_plugins/xgrids_k1/protocol/protobuf_wire.py
+++ b/src/k1link/device_plugins/xgrids_k1/protocol/protobuf_wire.py
@@ -38,6 +38,13 @@ def decode_zigzag64(value: int) -> int:
     return (value >> 1) ^ -(value & 1)
 
 
+def encode_zigzag64(value: int) -> int:
+    """Encode a signed 64-bit integer as protobuf sint64 ZigZag."""
+    if value < -(1 << 63) or value > (1 << 63) - 1:
+        raise ProtobufWireError("ZigZag input is outside int64")
+    return ((value << 1) ^ (value >> 63)) & 0xFFFFFFFFFFFFFFFF
+
+
 def iter_fields(data: bytes, *, max_fields: int = 1_000_000) -> Iterator[ProtoField]:
     """Iterate supported protobuf fields without recursion or unbounded allocation."""
     if max_fields < 1:
diff --git a/src/k1link/web/plugin_runtime.py b/src/k1link/web/plugin_runtime.py
index 7ca017e..493591a 100644
--- a/src/k1link/web/plugin_runtime.py
+++ b/src/k1link/web/plugin_runtime.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import logging
 from collections.abc import Callable, Mapping
 from dataclasses import dataclass
 from datetime import UTC, datetime
@@ -16,12 +17,14 @@ from missioncore_plugin_sdk.v0alpha2 import (
     RuntimeHealthSnapshot,
     RuntimePluginDescriptor,
 )
-from pydantic import BaseModel, ConfigDict, Field
+from pydantic import BaseModel, ConfigDict, Field, ValidationError
 
 from k1link.sessions.plugin_contract import ObservationRuntimeContribution
 
 STATE_READ_ACTION_ID = "state.read"
 
+logger = logging.getLogger(__name__)
+
 
 class DevicePluginActionRequest(BaseModel):
     model_config = ConfigDict(extra="forbid")
@@ -162,13 +165,28 @@ class InProcessDevicePluginRuntime:
                 f"{invocation.action_id}"
             )
         output = await self._adapter.invoke(invocation)
-        return RuntimeActionResult(
-            invocation_id=invocation.invocation_id,
-            plugin_id=invocation.plugin_id,
-            action_id=invocation.action_id,
-            completed_at=datetime.now(UTC),
-            output=dict(output),
-        )
+        try:
+            return RuntimeActionResult(
+                invocation_id=invocation.invocation_id,
+                plugin_id=invocation.plugin_id,
+                action_id=invocation.action_id,
+                completed_at=datetime.now(UTC),
+                output=dict(output),
+            )
+        except ValidationError as exc:
+            # Never allow a malformed plugin result to masquerade as invalid
+            # operator input (HTTP 422). Do not log the output or validation
+            # input: device snapshots may contain retained evidence.
+            logger.error(
+                "device plugin returned a non-JSON action result: "
+                "plugin_id=%s action_id=%s validation_errors=%d",
+                invocation.plugin_id,
+                invocation.action_id,
+                exc.error_count(),
+            )
+            raise PluginExecutionError(
+                "Device plugin returned an invalid non-JSON action result"
+            ) from exc
 
     def close(self) -> None:
         with self._lock:
diff --git a/tests/fixtures/xgrids_k1/device_info_fw3_0_2_semantics.json b/tests/fixtures/xgrids_k1/device_info_fw3_0_2_semantics.json
new file mode 100644
index 0000000..6a7f0d6
--- /dev/null
+++ b/tests/fixtures/xgrids_k1/device_info_fw3_0_2_semantics.json
@@ -0,0 +1,10 @@
+{
+  "schema_version": 1,
+  "source": "sanitized-owner-captured-clean-cycle-device-info",
+  "device_model": "LixelKity K1",
+  "platform_type": "A4",
+  "software_version": "V3.0.2_20250624.122658",
+  "system_version": "V3.0.2",
+  "is_activated": true,
+  "redaction": "No device identifier, serial, authority, network address, credential, or raw payload is retained."
+}
diff --git a/tests/test_cli.py b/tests/test_cli.py
index f99f32f..3e3fef5 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -4,6 +4,7 @@ from typing import Any
 
 from typer.testing import CliRunner
 
+from k1link.device_plugins.xgrids_k1 import cli
 from k1link.device_plugins.xgrids_k1.cli import app
 
 runner = CliRunner()
@@ -25,6 +26,26 @@ def test_doctor_json() -> None:
     assert any(item["name"] == "tcpdump" for item in payload["tools"])
 
 
+def test_serve_resolves_frontend_from_repository_root(monkeypatch: Any) -> None:
+    captured: dict[str, object] = {}
+
+    def fake_run(application: str, **kwargs: object) -> None:
+        captured.update({"application": application, **kwargs})
+
+    monkeypatch.setattr(cli.uvicorn, "run", fake_run)
+
+    result = runner.invoke(app, ["serve"])
+
+    assert result.exit_code == 0
+    assert captured == {
+        "application": "k1link.web.app:app",
+        "host": "127.0.0.1",
+        "port": 8000,
+        "log_level": "info",
+        "access_log": True,
+    }
+
+
 def test_authority_provision_requires_explicit_reviewed_value_confirmation() -> None:
     result = runner.invoke(app, ["authority", "provision"])
 
diff --git a/tests/test_plugin_runtime.py b/tests/test_plugin_runtime.py
index 495e794..506b1ae 100644
--- a/tests/test_plugin_runtime.py
+++ b/tests/test_plugin_runtime.py
@@ -361,6 +361,37 @@ def test_dispatcher_routes_allowlisted_action_to_xgrids_facade() -> None:
     assert service.calls == [("scan", 6.0)]
 
 
+def test_runtime_classifies_non_json_plugin_output_as_execution_failure(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    retained_marker = "must-not-appear-in-the-server-log"
+
+    class NonJsonAdapter:
+        plugin_id = "example.non-json"
+        action_ids = frozenset({"state.read"})
+
+        async def invoke(
+            self,
+            _invocation: RuntimeActionInvocation,
+        ) -> dict[str, Any]:
+            return {"dialogue": {"response_evidence": (retained_marker,)}}
+
+    dispatcher = DevicePluginDispatcher(
+        [
+            _in_process_runtime(
+                NonJsonAdapter(),
+                plugin_version="0.1.0",
+                host_api_version="missioncore.nodedc/v1alpha2",
+            )
+        ]
+    )
+
+    with pytest.raises(PluginExecutionError, match="non-JSON"):
+        asyncio.run(dispatcher.invoke("example.non-json", "state.read", {}))
+
+    assert retained_marker not in caplog.text
+
+
 def test_dispatcher_rejects_unknown_plugin_and_action() -> None:
     dispatcher = DevicePluginDispatcher(
         [_in_process_runtime(XgridsK1PluginFacade(FakeXgridsService()))]
@@ -404,7 +435,7 @@ def test_facade_validates_payload_before_calling_service() -> None:
                 "compatibility_attestation": {
                     "firmware_version": "3.0.2",
                     "topology": "direct-lan",
-                    "operator_confirmed": True,
+                    "verification": "live-device-info",
                 },
             },
             "live",
diff --git a/tests/test_stream_decoders.py b/tests/test_stream_decoders.py
index 02111c0..fa68c40 100644
--- a/tests/test_stream_decoders.py
+++ b/tests/test_stream_decoders.py
@@ -17,6 +17,7 @@ from k1link.device_plugins.xgrids_k1.protocol.modeling import (
 from k1link.device_plugins.xgrids_k1.protocol.protobuf_wire import (
     ProtobufWireError,
     decode_zigzag64,
+    encode_zigzag64,
     iter_fields,
 )
 from k1link.device_plugins.xgrids_k1.protocol.streams import (
@@ -94,6 +95,13 @@ def test_protobuf_wire_zigzag_and_bounds() -> None:
     assert decode_zigzag64(0) == 0
     assert decode_zigzag64(1) == -1
     assert decode_zigzag64(2) == 1
+    assert encode_zigzag64(0) == 0
+    assert encode_zigzag64(-1) == 1
+    assert encode_zigzag64(1) == 2
+    assert decode_zigzag64(encode_zigzag64(-(1 << 63))) == -(1 << 63)
+    assert decode_zigzag64(encode_zigzag64((1 << 63) - 1)) == (1 << 63) - 1
+    with pytest.raises(ProtobufWireError, match="outside int64"):
+        encode_zigzag64(1 << 63)
     with pytest.raises(ProtobufWireError, match="truncated"):
         list(iter_fields(b"\x0a\x02\x01"))
     with pytest.raises(ProtobufWireError, match="unsupported"):
diff --git a/tests/test_web_validation_security.py b/tests/test_web_validation_security.py
index 156613d..00b5bf7 100644
--- a/tests/test_web_validation_security.py
+++ b/tests/test_web_validation_security.py
@@ -77,7 +77,7 @@ def test_validation_errors_do_not_echo_sensitive_request_values(
         "compatibility_attestation": {
             "firmware_version": "3.0.2",
             "topology": "direct-lan",
-            "operator_confirmed": True,
+            "verification": "live-device-info",
         },
     }
     payload = {"input": action_input} if wrap_input else action_input
diff --git a/tests/test_xgrids_acquisition_lifecycle.py b/tests/test_xgrids_acquisition_lifecycle.py
index 70ddb9d..81f5556 100644
--- a/tests/test_xgrids_acquisition_lifecycle.py
+++ b/tests/test_xgrids_acquisition_lifecycle.py
@@ -31,7 +31,7 @@ from k1link.device_plugins.xgrids_k1.protocol.application_bootstrap import (
 ATTESTATION = CompatibilityAttestationRequest(
     firmware_version="3.0.2",
     topology="direct-lan",
-    operator_confirmed=True,
+    verification="live-device-info",
 )
 PRIMARY_TEST_CREDENTIAL = "x" * 24
 SECONDARY_TEST_CREDENTIAL = "y" * 24
@@ -120,12 +120,11 @@ class FakeInteractiveControlSession:
         self.state = "workspace-ready"
         self.start_projects: list[str] = []
         self.stop_calls = 0
-        self.confirm_calls = 0
 
     def snapshot(self) -> dict[str, object]:
         return {
             "state": self.state,
-            "can_confirm_standby": self.state == "awaiting-standby-confirmation",
+            "can_confirm_standby": False,
         }
 
     def open_project_prompt(self) -> dict[str, object]:
@@ -147,12 +146,6 @@ class FakeInteractiveControlSession:
         self.state = "awaiting-standby-confirmation"
         return self.snapshot()
 
-    def confirm_standby(self) -> dict[str, object]:
-        assert self.state == "awaiting-standby-confirmation"
-        self.confirm_calls += 1
-        self.state = "completed"
-        return self.snapshot()
-
     def close_prestart(self) -> dict[str, object]:
         self.state = "closed"
         return self.snapshot()
@@ -211,6 +204,8 @@ def test_prepare_creates_provisional_device_session_and_profiled_acquisition(
     assert state["device_ref"]["device_id"] != state["device_session"]["device_session_id"]
     assert state["acquisition"]["state"] == "prepared"
     assert state["acquisition"]["project_name"] == PROJECT_NAME
+    assert state["acquisition"]["mount_type"] == "handheld"
+    assert state["acquisition"]["gnss_mode"] == "none"
     assert state["acquisition"]["compatibility_profile_id"] == (XGRIDS_K1_COMPATIBILITY_PROFILE_ID)
     assert state["compatibility"]["vendor_writes_enabled"] is False
 
@@ -230,6 +225,29 @@ def test_project_name_is_normalized_and_control_characters_are_rejected() -> Non
                 host="192.168.1.20",
                 compatibility_attestation=ATTESTATION,
             )
+def test_only_physically_accepted_configuration_values_are_admitted() -> None:
+    with pytest.raises(ValidationError):
+        ConnectRequest(
+            device_id="synthetic-device",
+            ssid="synthetic-network",
+            password=SecretStr(PRIMARY_TEST_CREDENTIAL),
+            connection_mode="quick-connect",  # type: ignore[arg-type]
+            compatibility_attestation=ATTESTATION,
+        )
+    with pytest.raises(ValidationError):
+        PrepareAcquisitionRequest(
+            project_name=PROJECT_NAME,
+            host="192.168.1.20",
+            mount_type="uav",  # type: ignore[arg-type]
+            compatibility_attestation=ATTESTATION,
+        )
+    with pytest.raises(ValidationError):
+        PrepareAcquisitionRequest(
+            project_name=PROJECT_NAME,
+            host="192.168.1.20",
+            gnss_mode="rtk",  # type: ignore[arg-type]
+            compatibility_attestation=ATTESTATION,
+        )
 
 
 def test_facade_arms_bounded_shadow_lease_without_installing_publish_transport(
@@ -247,7 +265,8 @@ def test_facade_arms_bounded_shadow_lease_without_installing_publish_transport(
     service._compatibility_attestation = {  # noqa: SLF001
         "firmware_version": "3.0.2",
         "topology": "direct-lan",
-        "basis": "operator-attested",
+        "verification": "live-device-info",
+        "basis": "selected-profile-live-device-info-required",
         "observed_at": "2026-07-18T00:00:00Z",
     }
 
@@ -274,7 +293,7 @@ def test_facade_arms_bounded_shadow_lease_without_installing_publish_transport(
     assert disarmed["application_control_execution"]["lease"] is None
 
 
-def test_shadow_arm_requires_idle_connected_attested_device_before_keychain_read(
+def test_shadow_arm_requires_idle_connected_profile_selected_device_before_keychain_read(
     tmp_path: Path,
 ) -> None:
     loader = FakeApplicationAuthorityLoader()
@@ -405,21 +424,82 @@ def test_plugin_commanded_acquisition_keeps_start_and_stop_as_explicit_actions(
             physical_acceptance=PHYSICAL_ACCEPTANCE,
         )
     )
-    stop_operation = stopping["last_operation"]
     assert control.stop_calls == 1
     assert stopping["acquisition"]["state"] == "awaiting_external_stop"
+    assert stopping["last_operation"]["status"] == "running"
 
-    completed = service.stop_acquisition(
+    control.state = "completed"
+    completed = service.state()
+    assert control.stop_calls == 1
+    assert completed["acquisition"]["state"] == "completed"
+    assert completed["acquisition"]["result"]["device_state"] == "ready"
+    assert completed["last_operation"]["status"] == "succeeded"
+    assert runtime.stop_calls == 1
+
+
+def test_device_standby_retires_sources_after_terminal_local_stop_failure(
+    tmp_path: Path,
+) -> None:
+    service, runtime = service_with_fake_runtime(tmp_path)
+    control = FakeInteractiveControlSession()
+    service._application_control_session = control  # type: ignore[assignment]  # noqa: SLF001
+    service._k1_ip = "192.168.1.20"  # noqa: SLF001
+    service._compatibility_attestation = {"profile": "exact"}  # noqa: SLF001
+
+    prepared = service.prepare_acquisition(
+        PrepareAcquisitionRequest(
+            project_name="TEST001",
+            host="192.168.1.20",
+            compatibility_attestation=ATTESTATION,
+        )
+    )
+    acquisition_id = prepared["acquisition"]["acquisition_id"]
+    service.start_acquisition(
+        StartAcquisitionRequest(
+            acquisition_id=acquisition_id,
+            physical_acceptance=PHYSICAL_ACCEPTANCE,
+        )
+    )
+    runtime.mark_ready()
+    runtime.pcl_frames = 1
+    service.state()
+
+    stopping = service.stop_acquisition(
         StopAcquisitionRequest(
             acquisition_id=acquisition_id,
             mode="graceful",
-            operator_confirmed=True,
-            operation_id=stop_operation["operation_id"],
+            physical_acceptance=PHYSICAL_ACCEPTANCE,
         )
     )
+    stop_operation = stopping["last_operation"]
+    with service._lock:  # noqa: SLF001
+        assert service._acquisition is not None  # noqa: SLF001
+        service._acquisition.transition(  # noqa: SLF001
+            "failed",
+            message_code="acquisition.camera_failed",
+            result={"camera_failure_code": "camera-source-ended"},
+        )
+    service._operations.transition(  # noqa: SLF001
+        stop_operation["operation_id"],
+        "failed",
+        stage_code="runtime-failed",
+        message_code="acquisition.stop.runtime_failed",
+        error={
+            "category": "stream",
+            "code": "runtime-failed",
+            "retryable": False,
+            "safe_to_retry": False,
+            "side_effect_status": "unknown",
+        },
+    )
+
+    control.state = "completed"
+    recovered = service.state()
+
     assert control.stop_calls == 1
-    assert control.confirm_calls == 1
-    assert completed["acquisition"]["state"] == "completed"
+    assert control.state == "completed"
+    assert recovered["acquisition"]["state"] == "failed"
+    assert recovered["application_control_session"]["state"] == "completed"
     assert runtime.stop_calls == 1
 
 
@@ -1257,7 +1337,7 @@ def test_prepare_rejects_stream_subsets_and_duplicates(
         )
 
 
-def test_exact_profile_is_inactive_until_explicit_operator_attestation(
+def test_exact_profile_is_inactive_until_selected_for_live_device_info_verification(
     tmp_path: Path,
 ) -> None:
     service, _ = service_with_fake_runtime(tmp_path)
@@ -1267,7 +1347,7 @@ def test_exact_profile_is_inactive_until_explicit_operator_attestation(
         "profile_id": None,
         "decision": "unknown",
         "permitted_mode": "evidence-only",
-        "firmware_claim": "exact-3.0.2-profile-not-attested",
+        "firmware_claim": "exact-3.0.2-profile-not-selected",
         "attestation": None,
         "vendor_writes_enabled": False,
         "camera_preview": "unverified",
@@ -1284,7 +1364,9 @@ def test_exact_profile_is_inactive_until_explicit_operator_attestation(
 
     assert attested["compatibility"]["profile_id"] == XGRIDS_K1_COMPATIBILITY_PROFILE_ID
     assert attested["compatibility"]["decision"] == "limited"
-    assert attested["compatibility"]["attestation"]["basis"] == "operator-attested"
+    assert attested["compatibility"]["attestation"]["basis"] == (
+        "selected-profile-live-device-info-required"
+    )
     assert attested["device_session"]["compatibility_profile_id"] == (
         XGRIDS_K1_COMPATIBILITY_PROFILE_ID
     )
@@ -1722,6 +1804,7 @@ def test_network_provisioning_is_single_flight_and_secret_is_unwrapped_only_at_b
 
     assert boundary_calls == [("k1-a", "lab-network", PRIMARY_TEST_CREDENTIAL)]
     assert connected["k1_ip"] == "192.168.1.20"
+    assert connected["connection_mode"] == "bridge"
     assert PRIMARY_TEST_CREDENTIAL not in str(connected)
     provision_operations = [
         item for item in connected["operations"] if item["action"] == "network.provision"
@@ -1729,6 +1812,48 @@ def test_network_provisioning_is_single_flight_and_secret_is_unwrapped_only_at_b
     assert {item["status"] for item in provision_operations} == {"succeeded", "failed"}
 
 
+def test_network_provisioning_rejects_an_ipv4_owned_by_the_local_host(
+    monkeypatch: pytest.MonkeyPatch,
+    tmp_path: Path,
+) -> None:
+    service, _ = service_with_fake_runtime(tmp_path)
+    service._devices = [{"device_id": "k1-a"}]  # noqa: SLF001
+
+    async def fake_provision(*_: object, **__: object) -> dict[str, Any]:
+        return {
+            "started_at_utc": "2026-07-18T15:19:25Z",
+            "completed_at_utc": "2026-07-18T15:19:26Z",
+            "profile_id": "xgrids-k1-fw3-wifi-v1",
+            "outcome": "lan_address_observed",
+            "observations": [{"status": {"ipv4": "192.168.68.51"}}],
+        }
+
+    monkeypatch.setattr(facade_module, "provision_wifi_once", fake_provision)
+    monkeypatch.setattr(facade_module, "_target_is_local_ipv4", lambda _target: True)
+
+    with pytest.raises(RuntimeError, match="уже принадлежит этому компьютеру"):
+        asyncio.run(
+            service.connect(
+                ConnectRequest(
+                    device_id="k1-a",
+                    ssid="lab-network",
+                    password=SecretStr(PRIMARY_TEST_CREDENTIAL),
+                    compatibility_attestation=ATTESTATION,
+                )
+            )
+        )
+
+    state = service.state()
+    assert state["selected_device_id"] is None
+    assert state["k1_ip"] is None
+    operation = next(
+        item for item in state["operations"] if item["action"] == "network.provision"
+    )
+    assert operation["status"] == "failed"
+    assert operation["error"]["safe_to_retry"] is False
+    assert operation["error"]["side_effect_status"] == "unknown"
+
+
 def test_provisioning_cannot_switch_device_during_active_acquisition(
     monkeypatch: pytest.MonkeyPatch,
     tmp_path: Path,
diff --git a/tests/test_xgrids_application_acceptance.py b/tests/test_xgrids_application_acceptance.py
index c1eef78..419938d 100644
--- a/tests/test_xgrids_application_acceptance.py
+++ b/tests/test_xgrids_application_acceptance.py
@@ -4,6 +4,7 @@ import hashlib
 from collections.abc import Collection, Sequence
 
 import pytest
+from pydantic import JsonValue, TypeAdapter
 
 from k1link.device_plugins.xgrids_k1.protocol.application_acceptance import (
     ApplicationAcceptanceError,
@@ -11,6 +12,7 @@ from k1link.device_plugins.xgrids_k1.protocol.application_acceptance import (
     PhysicalAcceptanceChecklist,
     PhysicalAcceptanceDialogueExecutor,
     PhysicalAcceptancePermit,
+    ScanInitializationTimeout,
 )
 from k1link.device_plugins.xgrids_k1.protocol.application_bootstrap import (
     DEVICE_CONFIG_RESPONSE_TOPIC,
@@ -18,9 +20,6 @@ from k1link.device_plugins.xgrids_k1.protocol.application_bootstrap import (
     ShadowApplicationBootstrapOrchestrator,
     build_canonical_post_start_observation,
 )
-from k1link.device_plugins.xgrids_k1.protocol.application_mqtt import (
-    MODELING_RESPONSE_TOPIC,
-)
 from k1link.device_plugins.xgrids_k1.protocol.application_publish import (
     OneShotPublishEnvelope,
 )
@@ -67,14 +66,19 @@ def _header(session_id: str) -> bytes:
     return _text(4, VENDOR_DEVICE_ID) + _text(5, session_id) + _text(6, APPLICATION_KEY)
 
 
-def _device_info_response(session_id: str) -> bytes:
+def _device_info_response(
+    session_id: str,
+    *,
+    device_model: str = "LixelKity K1",
+    device_type: str = "A4",
+) -> bytes:
     base_info = b"".join(
         (
-            _text(2, "V3.0.2-20260101-release"),
+            _text(2, "V3.0.2_20250624.122658"),
             _text(3, "V3.0.2"),
-            _text(6, "LixelKity K1"),
+            _text(6, device_model),
             _text(7, "K1SERIAL01"),
-            _text(8, "K1"),
+            _text(8, device_type),
         )
     )
     working_status = _uint(1, 1)
@@ -93,7 +97,13 @@ def _modeling_response(action: ModelingAction) -> bytes:
 
 
 class SyntheticAcceptanceTransport:
-    def __init__(self, clock: FakeClock | None = None) -> None:
+    def __init__(
+        self,
+        clock: FakeClock | None = None,
+        *,
+        device_model: str = "LixelKity K1",
+        device_type: str = "A4",
+    ) -> None:
         self.batches: list[tuple[str, ...]] = []
         self.maintain_calls: list[tuple[float, tuple[str, ...]]] = []
         self.clock = clock
@@ -102,22 +112,32 @@ class SyntheticAcceptanceTransport:
         self.post_stop_maintain_calls = 0
         self.start_emitted = False
         self.stop_emitted = False
+        self.device_model = device_model
+        self.device_type = device_type
 
     def exchange_batch_once(
         self,
         envelopes: Sequence[OneShotPublishEnvelope],
         *,
-        required_response_topics: Collection[str],
+        required_response_operation_keys: Collection[str],
     ) -> dict[str, bytes]:
         self.batches.append(tuple(envelope.operation_key for envelope in envelopes))
         responses: dict[str, bytes] = {}
-        if MODELING_RESPONSE_TOPIC in required_response_topics:
+        modeling_operation = next(
+            (
+                operation_key
+                for operation_key in required_response_operation_keys
+                if operation_key in {"modeling:start", "modeling:stop"}
+            ),
+            None,
+        )
+        if modeling_operation is not None:
             action = (
                 ModelingAction.START
-                if envelopes[0].operation_key == "modeling:start"
+                if modeling_operation == "modeling:start"
                 else ModelingAction.STOP
             )
-            responses[MODELING_RESPONSE_TOPIC] = _modeling_response(action)
+            responses[modeling_operation] = _modeling_response(action)
             if action is ModelingAction.START:
                 self.start_emitted = True
             else:
@@ -134,7 +154,11 @@ class SyntheticAcceptanceTransport:
                     if ordinal == 1
                     else f"{VENDOR_DEVICE_ID}:DeviceInfoRequest"
                 )
-                response = _device_info_response(session)
+                response = _device_info_response(
+                    session,
+                    device_model=self.device_model,
+                    device_type=self.device_type,
+                )
             else:
                 session = (
                     f":{message_type}" if ordinal <= 3 else f"{VENDOR_DEVICE_ID}:{message_type}"
@@ -142,9 +166,8 @@ class SyntheticAcceptanceTransport:
                 if message_type == "DeviceConfigRequest":
                     session += ":Publish_Proto_DeviceConfig_SetTime"
                 response = _generic_response(session)
-            for topic in required_response_topics:
-                if topic.endswith(_response_suffix(message_type)):
-                    responses[topic] = response
+            if envelope.operation_key in required_response_operation_keys:
+                responses[envelope.operation_key] = response
         return responses
 
     def maintain_open_for(
@@ -178,18 +201,6 @@ class SyntheticAcceptanceTransport:
         return None
 
 
-def _response_suffix(message_type: str) -> str:
-    values = {
-        "DeviceInfoRequest": "device_info",
-        "ModelingStatusRequest": "modeling_status",
-        "GetRtkAdvanceRequest": "get_rtk_advance",
-        "DeviceConfigRequest": "device_config",
-        "GetNtripProfileRequest": "get_ntrip_profile",
-        "GetCloudServerConfigRequest": "get_cloud_server_config",
-    }
-    return values[message_type]
-
-
 def _checklist(action: ModelingAction) -> PhysicalAcceptanceChecklist:
     return PhysicalAcceptanceChecklist(
         action=action,
@@ -232,7 +243,14 @@ def test_canonical_session_owns_start_active_scan_stop_and_save_boundary() -> No
                 owner_token=object(),
             ),
         )
-    assert [len(batch) for batch in transport.batches] == [1, 2, 3]
+    assert [len(batch) for batch in transport.batches] == [1, 5]
+    assert transport.batches[1] == (
+        "bootstrap:2:ModelingStatusRequest",
+        "bootstrap:3:GetRtkAdvanceRequest",
+        "bootstrap:4:DeviceConfigRequest",
+        "bootstrap:5:DeviceInfoRequest",
+        "bootstrap:6:GetRtkAdvanceRequest",
+    )
     workspace_checks = iter((False, False, True))
     workspace_checkpoint = executor.wait_for_operator_checkpoint(
         "workspace-entered",
@@ -313,14 +331,11 @@ def test_canonical_session_owns_start_active_scan_stop_and_save_boundary() -> No
         )
     )
     stop_response = executor.execute_canonical_stop(stop_command, stop_permit)
-    standby_checks = iter((False, False, True))
-    executor.maintain_post_stop_until_standby_confirmed(
-        lambda: next(standby_checks)
-    )
+    executor.maintain_post_stop_until_standby()
 
     assert stop_response.action is ModelingAction.STOP
-    assert [len(batch) for batch in transport.batches] == [1, 2, 3, 1, 3, 1, 1, 2, 1]
-    assert len(transport.maintain_calls) == 214
+    assert [len(batch) for batch in transport.batches] == [1, 5, 1, 3, 1, 1, 2, 1]
+    assert len(transport.maintain_calls) == 212
     assert set(transport.maintain_calls) == {
         (1.0, ("lixel/application/response/modeling_status",))
     }
@@ -332,13 +347,120 @@ def test_canonical_session_owns_start_active_scan_stop_and_save_boundary() -> No
     assert executor.snapshot()["stop_complete"] is True
     assert executor.snapshot()["dialogue_stage"] == "standby-confirmed"
     response_evidence = executor.snapshot()["response_evidence"]
-    assert isinstance(response_evidence, tuple)
+    assert isinstance(response_evidence, list)
     assert len(response_evidence) == 13
     assert response_evidence[0]["operation_key"] == "bootstrap:1:DeviceInfoRequest"
     assert response_evidence[-1]["operation_key"] == "modeling:stop"
     assert all("payload" not in item for item in response_evidence)
     assert APPLICATION_KEY not in str(executor.snapshot())
     assert VENDOR_DEVICE_ID not in str(executor.snapshot())
+    TypeAdapter(JsonValue).validate_python(executor.snapshot())
+
+
+def test_start_initialization_wait_has_fail_closed_watchdog() -> None:
+    class NeverInitializedTransport(SyntheticAcceptanceTransport):
+        def scan_initialization_complete(self, _binding: object) -> bool:
+            return False
+
+    clock = FakeClock()
+    transport = NeverInitializedTransport(clock)
+    executor = PhysicalAcceptanceDialogueExecutor(
+        transport,
+        monotonic=clock,
+        scan_initialization_timeout_seconds=2.0,
+    )
+    authority = ApplicationControlAuthority(openapi_key=APPLICATION_KEY)
+    orchestrator = ShadowApplicationBootstrapOrchestrator(
+        authority,
+        epoch_seconds=1_752_680_000,
+        timezone_name="Europe/Moscow",
+    )
+    binding = executor.run_connection_stage(orchestrator)
+    executor.run_workspace_entry_stage(
+        orchestrator,
+        executor.wait_for_operator_checkpoint("workspace-entered", lambda: True),
+    )
+    executor.run_project_prompt_stage(
+        orchestrator,
+        executor.wait_for_operator_checkpoint("project-prompt-opened", lambda: True),
+    )
+    start_checkpoint = executor.wait_for_operator_checkpoint(
+        "start-confirmed",
+        lambda: True,
+    )
+    command = ShadowModelingCommand.from_command(
+        encode_modeling_start(
+            CommandHeaderIdentity(
+                device_id=binding.vendor_device_id,
+                openapi_key=APPLICATION_KEY,
+            ),
+            project_name="SAFE_PROJECT",
+            record_mode=RecordMode.RECORD_AND_CALCULATE,
+            scan_mode=ScanMode.LCC,
+            mount_type=MountType.HANDHELD,
+        )
+    )
+    permit = PhysicalAcceptancePermit(
+        _checklist(ModelingAction.START),
+        monotonic=clock,
+    )
+
+    with pytest.raises(ScanInitializationTimeout):
+        executor.execute_canonical_start(
+            command,
+            build_canonical_post_start_observation(authority, binding),
+            authority=authority,
+            binding=binding,
+            permit=permit,
+            checkpoint=start_checkpoint,
+        )
+
+    assert transport.start_emitted
+    assert not transport.stop_emitted
+    assert executor.snapshot()["dialogue_stage"] == "initializing"
+    assert executor.snapshot()["start_attempted"] is True
+    assert executor.snapshot()["start_complete"] is False
+
+
+@pytest.mark.parametrize(
+    ("device_model", "device_type"),
+    (
+        ("LixelKity K2", "A4"),
+        ("LixelKity K1", "K1"),
+    ),
+)
+def test_connection_stage_rejects_other_device_model_or_type_before_preparation(
+    device_model: str,
+    device_type: str,
+) -> None:
+    transport = SyntheticAcceptanceTransport(
+        device_model=device_model,
+        device_type=device_type,
+    )
+    executor = PhysicalAcceptanceDialogueExecutor(transport)
+    orchestrator = ShadowApplicationBootstrapOrchestrator(
+        ApplicationControlAuthority(openapi_key=APPLICATION_KEY),
+        epoch_seconds=1_752_680_000,
+        timezone_name="Europe/Moscow",
+    )
+
+    with pytest.raises(ApplicationAcceptanceError, match="incompatible with the selected"):
+        executor.run_connection_stage(orchestrator)
+
+    assert transport.batches == [("bootstrap:1:DeviceInfoRequest",)]
+    assert not transport.start_emitted
+    assert orchestrator.binding is None
+    snapshot = executor.snapshot()
+    assert snapshot["correlation_failure"] is None
+    compatibility_failure = snapshot["compatibility_failure"]
+    assert isinstance(compatibility_failure, dict)
+    assert compatibility_failure["reason_code"] == "compatibility_profile_mismatch"
+    assert compatibility_failure["expected"] == {
+        "device_model": "LixelKity K1",
+        "platform_type": "A4",
+        "firmware": "3.0.2",
+        "is_activated": True,
+    }
 
 
 def test_bootstrap_correlation_failure_records_only_redacted_response_evidence() -> None:
@@ -347,14 +469,15 @@ def test_bootstrap_correlation_failure_records_only_redacted_response_evidence()
             self,
             envelopes: Sequence[OneShotPublishEnvelope],
             *,
-            required_response_topics: Collection[str],
+            required_response_operation_keys: Collection[str],
         ) -> dict[str, bytes]:
             responses = super().exchange_batch_once(
                 envelopes,
-                required_response_topics=required_response_topics,
+                required_response_operation_keys=required_response_operation_keys,
             )
-            if DEVICE_CONFIG_RESPONSE_TOPIC in responses:
-                responses[DEVICE_CONFIG_RESPONSE_TOPIC] = _generic_response(
+            operation_key = "bootstrap:4:DeviceConfigRequest"
+            if operation_key in responses:
+                responses[operation_key] = _generic_response(
                     f"{VENDOR_DEVICE_ID}:wrong-session"
                 )
             return responses
@@ -380,10 +503,11 @@ def test_bootstrap_correlation_failure_records_only_redacted_response_evidence()
         "phase": "bootstrap",
         "operation_key": "bootstrap:4:DeviceConfigRequest",
         "response_topic": DEVICE_CONFIG_RESPONSE_TOPIC,
+        "reason_code": "response_session_mismatch",
         "reason": "application response session correlation failed",
     }
     evidence = snapshot["response_evidence"]
-    assert isinstance(evidence, tuple)
+    assert isinstance(evidence, list)
     assert evidence[-1]["payload_sha256"] == hashlib.sha256(
         _generic_response(f"{VENDOR_DEVICE_ID}:wrong-session")
     ).hexdigest()
@@ -391,6 +515,7 @@ def test_bootstrap_correlation_failure_records_only_redacted_response_evidence()
     assert all("payload" not in item for item in evidence)
     assert APPLICATION_KEY not in str(snapshot)
     assert VENDOR_DEVICE_ID not in str(snapshot)
+    TypeAdapter(JsonValue).validate_python(snapshot)
 
 
 def test_standalone_start_and_stop_are_both_disabled() -> None:
diff --git a/tests/test_xgrids_application_authority.py b/tests/test_xgrids_application_authority.py
index 22075bc..072ed5d 100644
--- a/tests/test_xgrids_application_authority.py
+++ b/tests/test_xgrids_application_authority.py
@@ -16,6 +16,23 @@ from k1link.device_plugins.xgrids_k1.protocol.application_authority import (
 PRIVATE_AUTHORITY = b"11111111-2222-3333-4444-555555555555\n"
 
 
+@patch("platform.system", return_value="Darwin")
+def test_runtime_authority_loads_through_security_framework_without_subprocess(
+    _system: object,
+) -> None:
+    calls: list[tuple[str, str]] = []
+
+    def framework_reader(*, service: str, account: str) -> bytes:
+        calls.append((service, account))
+        return PRIVATE_AUTHORITY
+
+    loader = MacOSKeychainApplicationAuthorityLoader(framework_reader=framework_reader)
+    authority = loader.load()
+
+    assert calls == [(KEYCHAIN_SERVICE, KEYCHAIN_ACCOUNT)]
+    assert PRIVATE_AUTHORITY.decode().strip() not in repr(authority)
+
+
 @patch("platform.system", return_value="Darwin")
 @patch("shutil.which", return_value="/usr/bin/security")
 def test_authority_loads_only_from_fixed_macos_keychain_item(
@@ -111,6 +128,21 @@ def test_authority_loader_rejects_wrong_profile_length_without_reflection(
     assert invalid_secret.decode() not in str(error.value)
 
 
+@patch("platform.system", return_value="Darwin")
+def test_framework_authority_failure_is_redacted(_system: object) -> None:
+    private_error = "private-framework-diagnostic"
+
+    def framework_reader(*, service: str, account: str) -> bytes:
+        assert service == KEYCHAIN_SERVICE
+        assert account == KEYCHAIN_ACCOUNT
+        raise RuntimeError(private_error)
+
+    with pytest.raises(ApplicationAuthorityLoadError) as error:
+        MacOSKeychainApplicationAuthorityLoader(framework_reader=framework_reader).load()
+
+    assert private_error not in str(error.value)
+
+
 @patch("sys.stdout.isatty", return_value=True)
 @patch("sys.stdin.isatty", return_value=True)
 @patch("platform.system", return_value="Darwin")
diff --git a/tests/test_xgrids_application_bootstrap.py b/tests/test_xgrids_application_bootstrap.py
index 953f43d..f97e6f3 100644
--- a/tests/test_xgrids_application_bootstrap.py
+++ b/tests/test_xgrids_application_bootstrap.py
@@ -1,5 +1,8 @@
 from __future__ import annotations
 
+import json
+from pathlib import Path
+
 import pytest
 
 from k1link.device_plugins.xgrids_k1.protocol.application_bootstrap import (
@@ -16,6 +19,14 @@ from k1link.device_plugins.xgrids_k1.protocol.protobuf_wire import iter_fields
 
 APPLICATION_KEY = "11111111-2222-3333-4444-555555555555"
 VENDOR_DEVICE_ID = "aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"
+CAPTURE_FACTS = json.loads(
+    (
+        Path(__file__).parent
+        / "fixtures"
+        / "xgrids_k1"
+        / "device_info_fw3_0_2_semantics.json"
+    ).read_text(encoding="utf-8")
+)
 
 
 def _varint(value: int) -> bytes:
@@ -47,11 +58,11 @@ def _binding(**changes: object) -> LiveDeviceControlBinding:
     values = {
         "vendor_device_id": VENDOR_DEVICE_ID,
         "device_serial": "K1SERIAL01",
-        "software_version": "V3.0.2-20260101-release",
-        "system_version": "V3.0.2",
-        "device_model": "LixelKity K1",
-        "device_type": "K1",
-        "is_activated": True,
+        "software_version": CAPTURE_FACTS["software_version"],
+        "system_version": CAPTURE_FACTS["system_version"],
+        "device_model": CAPTURE_FACTS["device_model"],
+        "device_type": CAPTURE_FACTS["platform_type"],
+        "is_activated": CAPTURE_FACTS["is_activated"],
     }
     values.update(changes)
     return LiveDeviceControlBinding(**values)  # type: ignore[arg-type]
@@ -62,13 +73,13 @@ def _device_info_response(*, session_id: str = ":DeviceInfoRequest") -> bytes:
     base_info = b"".join(
         (
             _text(1, "2026-01-01T00:00:00"),
-            _text(2, "V3.0.2-20260101-release"),
-            _text(3, "V3.0.2"),
+            _text(2, CAPTURE_FACTS["software_version"]),
+            _text(3, CAPTURE_FACTS["system_version"]),
             _text(4, "V1.2.3"),
             _text(5, "V1.0"),
-            _text(6, "LixelKity K1"),
+            _text(6, CAPTURE_FACTS["device_model"]),
             _text(7, "K1SERIAL01"),
-            _text(8, "K1"),
+            _text(8, CAPTURE_FACTS["platform_type"]),
         )
     )
     working_status = _uint(1, 1) + _uint(2, 0)
@@ -149,6 +160,27 @@ def test_bootstrap_headers_switch_from_unbound_to_live_device_identity() -> None
     )
 
 
+def test_device_config_timestamp_uses_captured_sint64_zigzag_wire_semantics() -> None:
+    captured_epoch_seconds = 1_784_215_030
+    plan = build_shadow_bootstrap(
+        _authority(),
+        _binding(),
+        epoch_seconds=captured_epoch_seconds,
+        timezone_name="Europe/Moscow",
+    )
+
+    config_request = plan.requests[3]
+    top_fields = {field.number: field.value for field in iter_fields(config_request.payload)}
+    time_config = top_fields[4]
+    assert isinstance(time_config, bytes)
+    time_fields = {field.number: field.value for field in iter_fields(time_config)}
+
+    assert time_fields == {
+        1: 3_568_430_060,
+        2: b"Europe/Moscow",
+    }
+
+
 def test_canonical_post_start_observation_preserves_retained_operations_12_to_14() -> None:
     plan = build_canonical_post_start_observation(_authority(), _binding())
 
@@ -169,6 +201,7 @@ def test_device_info_response_produces_live_binding_without_a_saved_device_profi
 
     assert response.result_code == OPENAPI_SUCCESS
     assert response.binding.ready_for_reviewed_profile
+    assert response.binding.matches_reviewed_device
     assert response.binding.matches_reviewed_firmware
     assert response.binding.is_activated
     assert VENDOR_DEVICE_ID not in repr(response)
@@ -181,7 +214,6 @@ def test_device_info_response_correlation_and_profile_attestation_fail_closed()
             _device_info_response(session_id=":AnotherRequest"),
             _authority(),
         )
-
     with pytest.raises(ApplicationBootstrapError, match="does not attest"):
         build_shadow_bootstrap(
             _authority(),
@@ -191,6 +223,37 @@ def test_device_info_response_correlation_and_profile_attestation_fail_closed()
         )
 
 
+@pytest.mark.parametrize(
+    ("device_model", "device_type"),
+    (
+        ("lixelkity K1", "A4"),
+        ("LixelKity K1 ", "A4"),
+        ("LixelKity K11", "A4"),
+        ("LixelKity K1", "a4"),
+        ("LixelKity K1", " A4"),
+        ("LixelKity K1", "K1"),
+    ),
+)
+def test_reviewed_profile_rejects_non_exact_device_model_and_type(
+    device_model: str,
+    device_type: str,
+) -> None:
+    binding = _binding(device_model=device_model, device_type=device_type)
+
+    assert binding.matches_reviewed_firmware
+    assert not binding.matches_reviewed_device
+    assert not binding.ready_for_reviewed_profile
+    with pytest.raises(ApplicationBootstrapError, match="does not attest"):
+        build_shadow_bootstrap(
+            _authority(),
+            binding,
+            epoch_seconds=1_752_680_000,
+            timezone_name="Europe/Moscow",
+        )
+    with pytest.raises(ApplicationBootstrapError, match="does not attest"):
+        build_canonical_post_start_observation(_authority(), binding)
+
+
 def test_response_barrier_orchestrator_emits_each_retained_batch_once() -> None:
     orchestrator = ShadowApplicationBootstrapOrchestrator(
         _authority(),
@@ -202,35 +265,37 @@ def test_response_barrier_orchestrator_emits_each_retained_batch_once() -> None:
     assert [request.ordinal for request in identity] == [1]
     with pytest.raises(ApplicationBootstrapError, match="already issued"):
         orchestrator.next_batch()
-    orchestrator.accept_response(identity[0].response_topic, _device_info_response())
-
-    initial_reads = orchestrator.next_batch()
-    assert [request.ordinal for request in initial_reads] == [2, 3]
-    assert [request.response_required for request in initial_reads] == [False, True]
     orchestrator.accept_response(
-        initial_reads[1].response_topic,
-        _generic_response(initial_reads[1].session_id),
+        "bootstrap:1:DeviceInfoRequest",
+        _device_info_response(),
     )
 
-    preparation = orchestrator.next_batch()
-    assert [request.ordinal for request in preparation] == [4, 5, 6]
-    device_info = preparation[1]
+    initial_reads = orchestrator.next_batch()
+    assert [request.ordinal for request in initial_reads] == [2, 3, 4, 5, 6]
+    assert [request.response_required for request in initial_reads] == [
+        False,
+        True,
+        True,
+        True,
+        True,
+    ]
+    device_info = initial_reads[3]
     orchestrator.accept_response(
-        device_info.response_topic,
+        "bootstrap:5:DeviceInfoRequest",
         _device_info_response(session_id=device_info.session_id),
     )
     with pytest.raises(ApplicationBootstrapError, match="already issued"):
         orchestrator.next_batch()
-    for request in (preparation[2], preparation[0]):
+    for request in (initial_reads[4], initial_reads[1], initial_reads[2]):
         orchestrator.accept_response(
-            request.response_topic,
+            f"bootstrap:{request.ordinal}:{request.message_type}",
             _generic_response(request.session_id),
         )
 
     ntrip = orchestrator.next_batch()
     assert [request.ordinal for request in ntrip] == [7]
     orchestrator.accept_response(
-        ntrip[0].response_topic,
+        "bootstrap:7:GetNtripProfileRequest",
         _generic_response(ntrip[0].session_id),
     )
 
@@ -242,7 +307,10 @@ def test_response_barrier_orchestrator_emits_each_retained_batch_once() -> None:
             if request.message_type == "DeviceInfoRequest"
             else _generic_response(request.session_id)
         )
-        orchestrator.accept_response(request.response_topic, payload)
+        orchestrator.accept_response(
+            f"bootstrap:{request.ordinal}:{request.message_type}",
+            payload,
+        )
 
     snapshot = orchestrator.snapshot()
     assert snapshot.bootstrap_complete
@@ -264,7 +332,7 @@ def test_orchestrator_rejects_unexpected_response_without_advancing() -> None:
 
     with pytest.raises(ApplicationBootstrapError, match="not required"):
         orchestrator.accept_response(
-            "lixel/application/response/get_rtk_advance",
+            "bootstrap:3:GetRtkAdvanceRequest",
             _generic_response(":GetRtkAdvanceRequest"),
         )
 
diff --git a/tests/test_xgrids_application_mqtt.py b/tests/test_xgrids_application_mqtt.py
index 6daef33..52fab0f 100644
--- a/tests/test_xgrids_application_mqtt.py
+++ b/tests/test_xgrids_application_mqtt.py
@@ -10,11 +10,14 @@ import pytest
 
 from k1link.device_plugins.xgrids_k1.protocol.application_bootstrap import (
     DEVICE_INFO_RESPONSE_TOPIC,
+    GET_RTK_ADVANCE_REQUEST_TOPIC,
+    GET_RTK_ADVANCE_RESPONSE_TOPIC,
     MODELING_STATUS_RESPONSE_TOPIC,
     LiveDeviceControlBinding,
 )
 from k1link.device_plugins.xgrids_k1.protocol.application_mqtt import (
     CONTROL_SUBSCRIPTION_GROUPS,
+    MODELING_RESPONSE_TOPIC,
     SYSTEM_ERROR_TOPIC,
     ApplicationCommandOutcomeUnknown,
     ApplicationControlDeviceFault,
@@ -26,12 +29,17 @@ from k1link.device_plugins.xgrids_k1.protocol.application_publish import (
 from k1link.device_plugins.xgrids_k1.protocol.modeling_control import (
     MODELING_STATE_BASE,
     SYSTEM_ERROR_STATE_BASE,
+    ModelingAction,
     SessionState,
 )
-from k1link.device_plugins.xgrids_k1.protocol.modeling_safety import DEVICE_STATUS_TOPIC
+from k1link.device_plugins.xgrids_k1.protocol.modeling_safety import (
+    DEVICE_STATUS_TOPIC,
+    MODELING_REQUEST_TOPIC,
+)
 
 VENDOR_DEVICE_ID = "aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"
 DEVICE_SERIAL = "K1SERIAL01"
+APPLICATION_KEY = "11111111-2222-3333-4444-555555555555"
 
 
 class FakeReasonCode:
@@ -70,6 +78,7 @@ class FakeControlClient:
         self.unsubscribe_calls: list[list[str]] = []
         self.disconnect_calls = 0
         self.next_mid = 20
+        self.connect_timeout = 5.0
 
     def connect(self, host: str, port: int, keepalive: int) -> mqtt.MQTTErrorCode:
         self.connect_calls.append((host, port, keepalive))
@@ -94,7 +103,7 @@ class FakeControlClient:
         self.next_mid += 1
         if self.emit_exchange:
             self.events.append(("publish", mid))
-            self.events.append(("message", (self.response_topic, b"response")))
+            self.events.append(("message", (self.response_topic, payload)))
         return SimpleNamespace(rc=mqtt.MQTT_ERR_SUCCESS, mid=mid)
 
     def loop(self, timeout: float) -> mqtt.MQTTErrorCode:
@@ -131,11 +140,32 @@ class FakeControlClient:
         return mqtt.MQTT_ERR_SUCCESS
 
 
-def _envelope(operation_key: str = "bootstrap:1:DeviceInfoRequest") -> OneShotPublishEnvelope:
-    payload = b"synthetic-reviewed-request"
+def _application_message(
+    session_id: str,
+    *,
+    device_id: str | None = None,
+) -> bytes:
+    header = b"".join(
+        (
+            _text(4, device_id) if device_id is not None else b"",
+            _text(5, session_id),
+            _text(6, APPLICATION_KEY),
+        )
+    )
+    return _bytes(1, header)
+
+
+def _envelope(
+    operation_key: str = "bootstrap:1:DeviceInfoRequest",
+    *,
+    topic: str = "lixel/application/request/device_info",
+    session_id: str = ":DeviceInfoRequest",
+    device_id: str | None = None,
+) -> OneShotPublishEnvelope:
+    payload = _application_message(session_id, device_id=device_id)
     return OneShotPublishEnvelope(
         operation_key=operation_key,
-        topic="lixel/application/request/device_info",
+        topic=topic,
         payload=payload,
         payload_sha256=hashlib.sha256(payload).hexdigest(),
         payload_bytes=len(payload),
@@ -144,10 +174,15 @@ def _envelope(operation_key: str = "bootstrap:1:DeviceInfoRequest") -> OneShotPu
     )
 
 
-def _modeling_status_envelope() -> OneShotPublishEnvelope:
-    payload = b"synthetic-reviewed-modeling-status"
+def _modeling_status_envelope(
+    operation_key: str = "dialogue:12:ModelingStatusRequest",
+) -> OneShotPublishEnvelope:
+    payload = _application_message(
+        f"{VENDOR_DEVICE_ID}:ModelingStatusRequest",
+        device_id=VENDOR_DEVICE_ID,
+    )
     return OneShotPublishEnvelope(
-        operation_key="dialogue:12:ModelingStatusRequest",
+        operation_key=operation_key,
         topic="lixel/application/request/modeling_status",
         payload=payload,
         payload_sha256=hashlib.sha256(payload).hexdigest(),
@@ -157,6 +192,33 @@ def _modeling_status_envelope() -> OneShotPublishEnvelope:
     )
 
 
+def _modeling_envelope(action: ModelingAction) -> OneShotPublishEnvelope:
+    payload = _application_message(
+        f"{VENDOR_DEVICE_ID}:ModelingRequest",
+        device_id=VENDOR_DEVICE_ID,
+    ) + _uint(2, action)
+    return OneShotPublishEnvelope(
+        operation_key=f"modeling:{action.name.casefold()}",
+        topic=MODELING_REQUEST_TOPIC,
+        payload=payload,
+        payload_sha256=hashlib.sha256(payload).hexdigest(),
+        payload_bytes=len(payload),
+        qos=2,
+        retain=False,
+    )
+
+
+def _modeling_response(action: ModelingAction) -> bytes:
+    return (
+        _application_message(
+            f"{VENDOR_DEVICE_ID}:ModelingRequest",
+            device_id=VENDOR_DEVICE_ID,
+        )
+        + _uint(2, action)
+        + _bytes(15, _uint(1, 0))
+    )
+
+
 def _varint(value: int) -> bytes:
     encoded = bytearray()
     while value > 0x7F:
@@ -203,7 +265,7 @@ def _binding() -> LiveDeviceControlBinding:
         software_version="V3.0.2-20260101-release",
         system_version="V3.0.2",
         device_model="LixelKity K1",
-        device_type="K1",
+        device_type="A4",
         is_activated=True,
     )
 
@@ -234,21 +296,24 @@ def test_acceptance_transport_connects_once_and_completes_one_qos2_exchange() ->
     opened = transport.open().as_dict()
     responses = transport.exchange_batch_once(
         [_envelope()],
-        required_response_topics={DEVICE_INFO_RESPONSE_TOPIC},
+        required_response_operation_keys={"bootstrap:1:DeviceInfoRequest"},
     )
     transport.close()
 
     assert fake.connect_calls == [("192.168.1.20", 1883, 60)]
+    assert fake.connect_timeout == 10.0
     assert fake.subscribe_calls == [list(group) for group in CONTROL_SUBSCRIPTION_GROUPS]
     assert fake.publish_calls == [
         (
             "lixel/application/request/device_info",
-            b"synthetic-reviewed-request",
+            _application_message(":DeviceInfoRequest"),
             2,
             False,
         )
     ]
-    assert responses == {DEVICE_INFO_RESPONSE_TOPIC: b"response"}
+    assert responses == {
+        "bootstrap:1:DeviceInfoRequest": _application_message(":DeviceInfoRequest")
+    }
     assert opened["clean_session"] is False
     assert opened["automatic_reconnect"] is False
     assert opened["automatic_retry"] is False
@@ -270,18 +335,325 @@ def test_consumed_operation_key_can_never_be_published_again() -> None:
     transport.open()
     transport.exchange_batch_once(
         [_envelope()],
-        required_response_topics={DEVICE_INFO_RESPONSE_TOPIC},
+        required_response_operation_keys={"bootstrap:1:DeviceInfoRequest"},
     )
 
     with pytest.raises(ApplicationCommandOutcomeUnknown, match="already consumed"):
         transport.exchange_batch_once(
             [_envelope()],
-            required_response_topics={DEVICE_INFO_RESPONSE_TOPIC},
+            required_response_operation_keys={"bootstrap:1:DeviceInfoRequest"},
         )
 
     assert len(fake.publish_calls) == 1
 
 
+def test_same_topic_inflight_responses_are_routed_by_exact_session_without_retry() -> None:
+    fake = FakeControlClient(response_topic=GET_RTK_ADVANCE_RESPONSE_TOPIC)
+    transport = ReviewedApplicationMqttTransport(
+        "192.168.1.20",
+        client_factory=lambda: cast(mqtt.Client, fake),
+    )
+    transport.open()
+    unbound = _envelope(
+        "bootstrap:3:GetRtkAdvanceRequest",
+        topic=GET_RTK_ADVANCE_REQUEST_TOPIC,
+        session_id=":GetRtkAdvanceRequest",
+    )
+    bound_session = f"{VENDOR_DEVICE_ID}:GetRtkAdvanceRequest"
+    bound = _envelope(
+        "bootstrap:6:GetRtkAdvanceRequest",
+        topic=GET_RTK_ADVANCE_REQUEST_TOPIC,
+        session_id=bound_session,
+        device_id=VENDOR_DEVICE_ID,
+    )
+
+    responses = transport.exchange_batch_once(
+        [unbound, bound],
+        required_response_operation_keys={unbound.operation_key, bound.operation_key},
+    )
+
+    assert responses[unbound.operation_key] == _application_message(
+        ":GetRtkAdvanceRequest"
+    )
+    assert responses[bound.operation_key] == _application_message(
+        bound_session,
+        device_id=VENDOR_DEVICE_ID,
+    )
+    snapshot = transport.snapshot()
+    assert snapshot.publish_attempts == 2
+    assert snapshot.qos2_completions == 2
+    assert snapshot.correlated_responses == 2
+    assert snapshot.late_known_responses == 0
+    assert snapshot.automatic_retry is False
+    assert len(fake.publish_calls) == 2
+
+
+def test_duplicate_start_response_blocks_stop_before_stop_is_published() -> None:
+    class ModelingControlClient(FakeControlClient):
+        def __init__(self) -> None:
+            super().__init__(
+                emit_exchange=False,
+                response_topic=MODELING_RESPONSE_TOPIC,
+            )
+
+        def publish(
+            self,
+            topic: str,
+            payload: bytes,
+            qos: int,
+            retain: bool,
+        ) -> SimpleNamespace:
+            info = super().publish(topic, payload, qos, retain)
+            action = (
+                ModelingAction.START
+                if len(self.publish_calls) == 1
+                else ModelingAction.STOP
+            )
+            self.events.append(("publish", info.mid))
+            self.events.append(
+                (
+                    "message",
+                    (MODELING_RESPONSE_TOPIC, _modeling_response(action)),
+                )
+            )
+            return info
+
+    fake = ModelingControlClient()
+    transport = ReviewedApplicationMqttTransport(
+        "192.168.1.20",
+        client_factory=lambda: cast(mqtt.Client, fake),
+    )
+    transport.open()
+
+    transport.exchange_batch_once(
+        [_modeling_envelope(ModelingAction.START)],
+        required_response_operation_keys={"modeling:start"},
+    )
+    fake.events.append(
+        (
+            "message",
+            (
+                MODELING_RESPONSE_TOPIC,
+                _modeling_response(ModelingAction.START),
+            ),
+        )
+    )
+    with pytest.raises(ApplicationCommandOutcomeUnknown, match="duplicate application response"):
+        transport.exchange_batch_once(
+            [_modeling_envelope(ModelingAction.STOP)],
+            required_response_operation_keys={"modeling:stop"},
+        )
+
+    snapshot = transport.snapshot()
+    assert snapshot.publish_attempts == 1
+    assert snapshot.correlated_responses == 1
+    assert snapshot.late_known_responses == 0
+    assert snapshot.state == "poisoned"
+    assert len(fake.publish_calls) == 1
+
+
+def test_unanswered_optional_status_does_not_steal_same_identity_required_refresh() -> None:
+    class ReusedStatusClient(FakeControlClient):
+        def __init__(self) -> None:
+            super().__init__(
+                emit_exchange=False,
+                response_topic=MODELING_STATUS_RESPONSE_TOPIC,
+            )
+
+        def publish(
+            self,
+            topic: str,
+            payload: bytes,
+            qos: int,
+            retain: bool,
+        ) -> SimpleNamespace:
+            info = super().publish(topic, payload, qos, retain)
+            self.events.append(("publish", info.mid))
+            if len(self.publish_calls) == 2:
+                # Ordinals 12 and 14 intentionally reuse the same protocol
+                # identity.  The capture has only one response after ordinal
+                # 14; unanswered optional ordinal 12 must not swallow it.
+                self.events.append(
+                    ("message", (MODELING_STATUS_RESPONSE_TOPIC, payload))
+                )
+            return info
+
+    fake = ReusedStatusClient()
+    transport = ReviewedApplicationMqttTransport(
+        "192.168.1.20",
+        client_factory=lambda: cast(mqtt.Client, fake),
+    )
+    transport.open()
+    immediate = _modeling_status_envelope()
+    refresh = _modeling_status_envelope("dialogue:14:ModelingStatusRequest")
+
+    transport.exchange_batch_once(
+        [immediate],
+        required_response_operation_keys=(),
+    )
+    responses = transport.exchange_batch_once(
+        [refresh],
+        required_response_operation_keys={refresh.operation_key},
+    )
+
+    assert responses[refresh.operation_key] == refresh.payload
+    snapshot = transport.snapshot()
+    assert snapshot.publish_attempts == 2
+    assert snapshot.correlated_responses == 1
+    assert snapshot.ignored_known_responses == 0
+    assert snapshot.late_known_responses == 0
+
+
+def test_already_arrived_optional_status_is_consumed_before_required_refresh() -> None:
+    class ReusedStatusClient(FakeControlClient):
+        def __init__(self) -> None:
+            super().__init__(
+                emit_exchange=False,
+                response_topic=MODELING_STATUS_RESPONSE_TOPIC,
+            )
+
+        def publish(
+            self,
+            topic: str,
+            payload: bytes,
+            qos: int,
+            retain: bool,
+        ) -> SimpleNamespace:
+            info = super().publish(topic, payload, qos, retain)
+            self.events.append(("publish", info.mid))
+            if len(self.publish_calls) == 2:
+                self.events.append(
+                    ("message", (MODELING_STATUS_RESPONSE_TOPIC, payload))
+                )
+            return info
+
+    fake = ReusedStatusClient()
+    transport = ReviewedApplicationMqttTransport(
+        "192.168.1.20",
+        client_factory=lambda: cast(mqtt.Client, fake),
+    )
+    transport.open()
+    immediate = _modeling_status_envelope()
+    refresh = _modeling_status_envelope("dialogue:14:ModelingStatusRequest")
+
+    transport.exchange_batch_once(
+        [immediate],
+        required_response_operation_keys=(),
+    )
+    # This callback is already available before ordinal 14 is admitted.  The
+    # retained socket's zero-wait service turn must consume it as ordinal 12.
+    fake.events.append(
+        ("message", (MODELING_STATUS_RESPONSE_TOPIC, immediate.payload))
+    )
+    responses = transport.exchange_batch_once(
+        [refresh],
+        required_response_operation_keys={refresh.operation_key},
+    )
+
+    assert responses[refresh.operation_key] == refresh.payload
+    snapshot = transport.snapshot()
+    assert snapshot.publish_attempts == 2
+    assert snapshot.correlated_responses == 1
+    assert snapshot.ignored_known_responses == 1
+    assert snapshot.late_known_responses == 1
+
+
+def test_unbound_optional_status_remains_distinct_from_bound_required_refresh() -> None:
+    class DistinctStatusClient(FakeControlClient):
+        def __init__(self) -> None:
+            super().__init__(
+                emit_exchange=False,
+                response_topic=MODELING_STATUS_RESPONSE_TOPIC,
+            )
+
+        def publish(
+            self,
+            topic: str,
+            payload: bytes,
+            qos: int,
+            retain: bool,
+        ) -> SimpleNamespace:
+            info = super().publish(topic, payload, qos, retain)
+            self.events.append(("publish", info.mid))
+            if len(self.publish_calls) == 2:
+                self.events.append(
+                    (
+                        "message",
+                        (
+                            MODELING_STATUS_RESPONSE_TOPIC,
+                            _application_message(":ModelingStatusRequest"),
+                        ),
+                    )
+                )
+                self.events.append(
+                    ("message", (MODELING_STATUS_RESPONSE_TOPIC, payload))
+                )
+            return info
+
+    fake = DistinctStatusClient()
+    transport = ReviewedApplicationMqttTransport(
+        "192.168.1.20",
+        client_factory=lambda: cast(mqtt.Client, fake),
+    )
+    transport.open()
+    initial = _envelope(
+        "bootstrap:2:ModelingStatusRequest",
+        topic="lixel/application/request/modeling_status",
+        session_id=":ModelingStatusRequest",
+    )
+    refresh = _modeling_status_envelope("dialogue:14:ModelingStatusRequest")
+
+    transport.exchange_batch_once(
+        [initial],
+        required_response_operation_keys=(),
+    )
+    responses = transport.exchange_batch_once(
+        [refresh],
+        required_response_operation_keys={refresh.operation_key},
+    )
+
+    assert responses[refresh.operation_key] == refresh.payload
+    snapshot = transport.snapshot()
+    assert snapshot.publish_attempts == 2
+    assert snapshot.correlated_responses == 1
+    assert snapshot.ignored_known_responses == 1
+    assert snapshot.late_known_responses == 1
+
+
+def test_duplicate_current_application_response_fails_closed() -> None:
+    class DuplicateResponseClient(FakeControlClient):
+        def publish(
+            self,
+            topic: str,
+            payload: bytes,
+            qos: int,
+            retain: bool,
+        ) -> SimpleNamespace:
+            info = super().publish(topic, payload, qos, retain)
+            self.events.append(("message", (self.response_topic, payload)))
+            return info
+
+    fake = DuplicateResponseClient()
+    transport = ReviewedApplicationMqttTransport(
+        "192.168.1.20",
+        client_factory=lambda: cast(mqtt.Client, fake),
+    )
+    transport.open()
+
+    with pytest.raises(
+        ApplicationCommandOutcomeUnknown,
+        match="duplicate application response",
+    ) as raised:
+        transport.exchange_batch_once(
+            [_envelope()],
+            required_response_operation_keys={"bootstrap:1:DeviceInfoRequest"},
+        )
+
+    assert raised.value.reason_code == "duplicate_application_response"
+    assert transport.snapshot().state == "poisoned"
+    assert len(fake.publish_calls) == 1
+
+
 def test_post_start_status_can_be_response_free_and_socket_is_continuously_serviced() -> None:
     clock = FakeClock()
     fake = FakeControlClient(
@@ -297,7 +669,7 @@ def test_post_start_status_can_be_response_free_and_socket_is_continuously_servi
 
     responses = transport.exchange_batch_once(
         [_modeling_status_envelope()],
-        required_response_topics=(),
+        required_response_operation_keys=(),
     )
     transport.maintain_open_for(
         2.0,
@@ -386,7 +758,7 @@ def test_post_publish_timeout_poisoned_transport_never_retries() -> None:
     with pytest.raises(ApplicationCommandOutcomeUnknown, match="automatic retry is forbidden"):
         transport.exchange_batch_once(
             [_envelope()],
-            required_response_topics={DEVICE_INFO_RESPONSE_TOPIC},
+            required_response_operation_keys={"bootstrap:1:DeviceInfoRequest"},
         )
 
     assert transport.snapshot().state == "poisoned"
@@ -394,6 +766,6 @@ def test_post_publish_timeout_poisoned_transport_never_retries() -> None:
     with pytest.raises(ApplicationCommandOutcomeUnknown, match="already consumed"):
         transport.exchange_batch_once(
             [_envelope()],
-            required_response_topics={DEVICE_INFO_RESPONSE_TOPIC},
+            required_response_operation_keys={"bootstrap:1:DeviceInfoRequest"},
         )
     assert len(fake.publish_calls) == 1
diff --git a/tests/test_xgrids_application_publish.py b/tests/test_xgrids_application_publish.py
index fde3c9a..c054586 100644
--- a/tests/test_xgrids_application_publish.py
+++ b/tests/test_xgrids_application_publish.py
@@ -40,7 +40,7 @@ def _envelope() -> OneShotPublishEnvelope:
         software_version="V3.0.2-build.1",
         system_version="V3.0.2",
         device_model="LixelKity K1",
-        device_type="K1",
+        device_type="A4",
         is_activated=True,
     )
     request = build_shadow_bootstrap(
diff --git a/tests/test_xgrids_application_session.py b/tests/test_xgrids_application_session.py
index c2095c8..3c9250d 100644
--- a/tests/test_xgrids_application_session.py
+++ b/tests/test_xgrids_application_session.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import logging
 import threading
 import time
 from dataclasses import dataclass
@@ -37,6 +38,11 @@ class FakeTransportSnapshot:
     def as_dict(self) -> dict[str, object]:
         return {
             "state": self.state,
+            "publish_attempts": 0,
+            "qos2_completions": 0,
+            "correlated_responses": 0,
+            "ignored_known_responses": 0,
+            "late_known_responses": 0,
             "latest_device_session_state": "ready" if self.ready else "scanning",
             "latest_device_project_bound": not self.ready,
             "automatic_retry": False,
@@ -71,8 +77,8 @@ class FakeExecutor:
             device_serial="serial-id",
             software_version="3.0.2",
             system_version="3.0.2",
-            device_model="K1",
-            device_type="scanner",
+            device_model="LixelKity K1",
+            device_type="A4",
             is_activated=True,
         )
 
@@ -124,13 +130,17 @@ class FakeExecutor:
         self.transport.ready = True
         return object()
 
-    def maintain_post_stop_until_standby_confirmed(self, observed: Any) -> None:
-        self.records.append("wait:steady-green")
-        while not observed():
-            threading.Event().wait(0.005)
+    def maintain_post_stop_until_standby(self) -> None:
+        self.records.append("wait:device-standby")
 
     def snapshot(self) -> dict[str, object]:
-        return {"records": tuple(self.records), "automatic_retry": False}
+        return {
+            "records": list(self.records),
+            "dialogue_stage": "test-stage",
+            "start_attempted": False,
+            "stop_attempted": False,
+            "automatic_retry": False,
+        }
 
 
 def _confirmation() -> OperatorPresenceConfirmation:
@@ -156,7 +166,7 @@ def _wait_phase(
     raise AssertionError(f"session did not reach {expected}: {session.snapshot()}")
 
 
-def test_every_canonical_stage_requires_a_separate_operator_event(
+def test_canonical_stages_require_operator_events_but_device_standby_does_not(
     monkeypatch: pytest.MonkeyPatch,
 ) -> None:
     FakeExecutor.records = []
@@ -195,12 +205,9 @@ def test_every_canonical_stage_requires_a_separate_operator_event(
     assert FakeExecutor.records[-1] == "wait:stop"
 
     session.request_stop(confirmation=_confirmation())
-    standby = _wait_phase(session, "awaiting-standby-confirmation")
-    assert standby["can_confirm_standby"] is True
-    assert FakeExecutor.records[-1] == "wait:steady-green"
-
-    session.confirm_standby()
     completed = _wait_phase(session, "completed")
+    assert completed["can_confirm_standby"] is False
+    assert completed["pending_operator_action"] is None
     assert loader.calls == 1
     assert completed["automatic_retry"] is False
     assert completed["scripted_transitions"] is False
@@ -214,5 +221,508 @@ def test_every_canonical_stage_requires_a_separate_operator_event(
         "start:11-14",
         "wait:stop",
         "stop",
-        "wait:steady-green",
+        "wait:device-standby",
     ]
+
+
+def test_prestart_failure_is_reported_and_requires_a_new_operator_click(
+    monkeypatch: pytest.MonkeyPatch,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    caplog.set_level(logging.ERROR)
+
+    class BootstrapFailureExecutor(FakeExecutor):
+        def run_connection_stage(
+            self,
+            _orchestrator: object,
+        ) -> LiveDeviceControlBinding:
+            raise RuntimeError("bootstrap correlation failed")
+
+        def snapshot(self) -> dict[str, object]:
+            return {
+                "dialogue_stage": "connection",
+                "start_attempted": False,
+                "stop_attempted": False,
+                "response_evidence": [],
+                "automatic_retry": False,
+            }
+
+    monkeypatch.setattr(
+        session_module,
+        "PhysicalAcceptanceDialogueExecutor",
+        BootstrapFailureExecutor,
+    )
+    session = InteractiveApplicationControlSession(
+        FakeAuthorityLoader(),
+        transport_factory=lambda host: FakeTransport(host),  # type: ignore[arg-type]
+    )
+
+    session.open(
+        host="192.168.1.20",
+        timezone_name="Europe/Moscow",
+        confirmation=_confirmation(),
+    )
+    _wait_phase(session, "failed")
+    failed_thread = session._thread  # noqa: SLF001
+    assert failed_thread is not None
+    failed_thread.join(timeout=2.0)
+    assert not failed_thread.is_alive()
+    failed = session.snapshot()
+
+    assert failed["outcome_unknown"] is False
+    assert failed["can_open"] is True
+    assert failed["automatic_retry"] is False
+    assert failed["failure"] == {
+        "code": "RuntimeError",
+        "reason_code": "unexpected_runtime_error",
+        "message": "bootstrap correlation failed",
+        "failed_phase": "connecting",
+        "dialogue_stage": "connection",
+        "transport_state": "ready",
+        "publish_attempts": 0,
+        "qos2_completions": 0,
+        "correlated_responses": 0,
+        "ignored_known_responses": 0,
+        "late_known_responses": 0,
+        "modeling_command_attempted": False,
+        "diagnostic_snapshot_unavailable": [],
+        "diagnostic_evidence_unavailable": [],
+        "correlation_failure": None,
+        "compatibility_failure": None,
+        "safe_to_retry": True,
+    }
+    assert "reason_code=unexpected_runtime_error" in caplog.text
+
+
+def test_correlated_read_only_profile_mismatch_allows_only_a_fresh_explicit_attempt(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    class ProfileMismatchError(RuntimeError):
+        reason_code = "compatibility_profile_mismatch"
+
+    @dataclass
+    class CorrelatedReadSnapshot:
+        state: str
+
+        def as_dict(self) -> dict[str, object]:
+            return {
+                "state": self.state,
+                "publish_attempts": 1,
+                "qos2_completions": 1,
+                "correlated_responses": 1,
+                "ignored_known_responses": 0,
+                "late_known_responses": 0,
+                "automatic_retry": False,
+                "automatic_reconnect": False,
+            }
+
+    class CorrelatedReadTransport(FakeTransport):
+        def snapshot(self) -> CorrelatedReadSnapshot:
+            return CorrelatedReadSnapshot(self.state)
+
+    class ProfileMismatchExecutor(FakeExecutor):
+        def run_connection_stage(
+            self,
+            _orchestrator: object,
+        ) -> LiveDeviceControlBinding:
+            raise ProfileMismatchError("live DeviceInfo profile mismatch")
+
+        def snapshot(self) -> dict[str, object]:
+            return {
+                "dialogue_stage": "new",
+                "start_attempted": False,
+                "stop_attempted": False,
+                "response_evidence": [],
+                "correlation_failure": None,
+                "compatibility_failure": {
+                    "operation_key": "bootstrap:1:DeviceInfoRequest",
+                    "reason_code": "compatibility_profile_mismatch",
+                },
+                "automatic_retry": False,
+            }
+
+    monkeypatch.setattr(
+        session_module,
+        "PhysicalAcceptanceDialogueExecutor",
+        ProfileMismatchExecutor,
+    )
+    session = InteractiveApplicationControlSession(
+        FakeAuthorityLoader(),
+        transport_factory=lambda host: CorrelatedReadTransport(host),  # type: ignore[arg-type]
+    )
+
+    session.open(
+        host="192.168.1.20",
+        timezone_name="Europe/Moscow",
+        confirmation=_confirmation(),
+    )
+    failed_thread = session._thread  # noqa: SLF001
+    assert failed_thread is not None
+    failed_thread.join(timeout=2.0)
+    assert not failed_thread.is_alive()
+
+    failed = session.snapshot()
+    assert failed["state"] == "failed"
+    assert failed["outcome_unknown"] is False
+    assert failed["automatic_retry"] is False
+    assert failed["can_open"] is True
+    failure = failed["failure"]
+    assert isinstance(failure, dict)
+    assert failure["reason_code"] == "compatibility_profile_mismatch"
+    assert failure["modeling_command_attempted"] is False
+    assert failure["safe_to_retry"] is True
+
+
+def test_new_explicit_session_waits_for_old_worker_transport_retirement(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    old_close_entered = threading.Event()
+    release_old_close = threading.Event()
+    transports: list[TaggedTransport] = []
+
+    @dataclass
+    class TaggedTransportSnapshot:
+        state: str
+        ready: bool
+        tag: str
+
+        def as_dict(self) -> dict[str, object]:
+            return {
+                "state": self.state,
+                "tag": self.tag,
+                "publish_attempts": 0,
+                "qos2_completions": 0,
+                "correlated_responses": 0,
+                "ignored_known_responses": 0,
+                "late_known_responses": 0,
+                "latest_device_session_state": "ready" if self.ready else "scanning",
+                "latest_device_project_bound": not self.ready,
+                "automatic_retry": False,
+                "automatic_reconnect": False,
+            }
+
+    class TaggedTransport(FakeTransport):
+        def __init__(self, host: str, tag: str) -> None:
+            super().__init__(host)
+            self.tag = tag
+            self.close_calls = 0
+
+        def close(self) -> None:
+            if self.tag == "generation-1":
+                old_close_entered.set()
+                assert release_old_close.wait(timeout=2.0)
+            self.close_calls += 1
+            super().close()
+
+        def snapshot(self) -> TaggedTransportSnapshot:
+            return TaggedTransportSnapshot(self.state, self.ready, self.tag)
+
+    class RacingExecutor(FakeExecutor):
+        instances = 0
+
+        def __init__(self, transport: TaggedTransport) -> None:
+            super().__init__(transport)
+            type(self).instances += 1
+            self.instance = type(self).instances
+
+        def run_connection_stage(
+            self,
+            orchestrator: object,
+        ) -> LiveDeviceControlBinding:
+            if self.instance == 1:
+                raise RuntimeError("first generation failed before publish")
+            return super().run_connection_stage(orchestrator)
+
+    def transport_factory(host: str) -> TaggedTransport:
+        transport = TaggedTransport(host, f"generation-{len(transports) + 1}")
+        transports.append(transport)
+        return transport
+
+    FakeExecutor.records = []
+    monkeypatch.setattr(
+        session_module,
+        "PhysicalAcceptanceDialogueExecutor",
+        RacingExecutor,
+    )
+    session = InteractiveApplicationControlSession(
+        FakeAuthorityLoader(),
+        transport_factory=transport_factory,  # type: ignore[arg-type]
+    )
+
+    session.open(
+        host="192.168.1.20",
+        timezone_name="Europe/Moscow",
+        confirmation=_confirmation(),
+    )
+    _wait_phase(session, "failed")
+    assert old_close_entered.wait(timeout=2.0)
+    old_thread = session._thread  # noqa: SLF001
+    assert old_thread is not None
+
+    # The failure is safe to retry at the protocol level, but the old worker
+    # still owns its socket. A new explicit click must not construct or open a
+    # second transport until close() completes and the worker exits.
+    retiring = session.snapshot()
+    assert retiring["failure"]["safe_to_retry"] is True  # type: ignore[index]
+    assert retiring["can_open"] is False
+    with pytest.raises(
+        session_module.ApplicationAcceptanceError,
+        match="already open or requires manual recovery",
+    ):
+        session.open(
+            host="192.168.1.20",
+            timezone_name="Europe/Moscow",
+            confirmation=_confirmation(),
+        )
+    assert len(transports) == 1
+    assert transports[0].close_calls == 0
+
+    release_old_close.set()
+    old_thread.join(timeout=2.0)
+    assert not old_thread.is_alive()
+    retired = session.snapshot()
+    assert retired["state"] == "failed"
+    assert retired["can_open"] is True
+    assert transports[0].close_calls == 1
+
+    # Only a fresh explicit action after retirement creates generation 2.
+    session.open(
+        host="192.168.1.20",
+        timezone_name="Europe/Moscow",
+        confirmation=_confirmation(),
+    )
+    new_thread = session._thread  # noqa: SLF001
+    assert new_thread is not None
+    current = _wait_phase(session, "connection-ready")
+    assert current["transport"]["tag"] == "generation-2"  # type: ignore[index]
+    assert session._transport is transports[1]  # noqa: SLF001
+    assert transports[1].close_calls == 0
+
+    # Complete the second synthetic session so no background waiter remains.
+    session.enter_workspace()
+    _wait_phase(session, "workspace-ready")
+    session.open_project_prompt()
+    _wait_phase(session, "project-ready")
+    session.request_start(project_name="TEST002", confirmation=_confirmation())
+    _wait_phase(session, "scanning")
+    session.request_stop(confirmation=_confirmation())
+    _wait_phase(session, "completed")
+    new_thread.join(timeout=2.0)
+    assert not new_thread.is_alive()
+    assert transports[1].close_calls == 1
+
+
+def test_start_outcome_unknown_blocks_reopen_even_when_transport_is_closed(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    class StartFailureExecutor(FakeExecutor):
+        start_attempted = False
+
+        def execute_canonical_start(self, *_args: object, **_kwargs: object) -> object:
+            type(self).start_attempted = True
+            raise session_module.ApplicationCommandOutcomeUnknown(
+                "START response was not correlated"
+            )
+
+        def snapshot(self) -> dict[str, object]:
+            return {
+                "dialogue_stage": "start-attempted",
+                "start_attempted": type(self).start_attempted,
+                "stop_attempted": False,
+                "response_evidence": [],
+                "automatic_retry": False,
+            }
+
+    FakeExecutor.records = []
+    StartFailureExecutor.start_attempted = False
+    monkeypatch.setattr(
+        session_module,
+        "PhysicalAcceptanceDialogueExecutor",
+        StartFailureExecutor,
+    )
+    session = InteractiveApplicationControlSession(
+        FakeAuthorityLoader(),
+        transport_factory=lambda host: FakeTransport(host),  # type: ignore[arg-type]
+    )
+
+    session.open(
+        host="192.168.1.20",
+        timezone_name="Europe/Moscow",
+        confirmation=_confirmation(),
+    )
+    _wait_phase(session, "connection-ready")
+    session.enter_workspace()
+    _wait_phase(session, "workspace-ready")
+    session.open_project_prompt()
+    _wait_phase(session, "project-ready")
+    session.request_start(project_name="TEST001", confirmation=_confirmation())
+    failed = _wait_phase(session, "failed")
+
+    assert failed["outcome_unknown"] is True
+    assert failed["can_open"] is False
+    assert failed["failure"]["modeling_command_attempted"] is True  # type: ignore[index]
+    assert failed["failure"]["safe_to_retry"] is False  # type: ignore[index]
+
+
+def test_unavailable_transport_snapshot_after_publish_blocks_reopen(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    executor_entered = threading.Event()
+    release_failure = threading.Event()
+
+    class SnapshotFailureTransport(FakeTransport):
+        def __init__(self, host: str) -> None:
+            super().__init__(host)
+            self.simulated_publish_attempts = 0
+            self.snapshot_unavailable = False
+
+        def snapshot(self) -> FakeTransportSnapshot:
+            if self.snapshot_unavailable:
+                raise RuntimeError("simulated transport snapshot failure")
+            return super().snapshot()
+
+    class PublishedThenFailedExecutor(FakeExecutor):
+        def run_connection_stage(
+            self,
+            _orchestrator: object,
+        ) -> LiveDeviceControlBinding:
+            executor_entered.set()
+            assert release_failure.wait(timeout=2.0)
+            assert isinstance(self.transport, SnapshotFailureTransport)
+            self.transport.simulated_publish_attempts = 1
+            self.transport.snapshot_unavailable = True
+            raise RuntimeError("bootstrap failed after simulated publish")
+
+    monkeypatch.setattr(
+        session_module,
+        "PhysicalAcceptanceDialogueExecutor",
+        PublishedThenFailedExecutor,
+    )
+    transport = SnapshotFailureTransport("192.168.1.20")
+    session = InteractiveApplicationControlSession(
+        FakeAuthorityLoader(),
+        transport_factory=lambda _host: transport,  # type: ignore[arg-type]
+    )
+
+    session.open(
+        host="192.168.1.20",
+        timezone_name="Europe/Moscow",
+        confirmation=_confirmation(),
+    )
+    assert executor_entered.wait(timeout=2.0)
+    failed_thread = session._thread  # noqa: SLF001
+    assert failed_thread is not None
+    release_failure.set()
+    failed_thread.join(timeout=2.0)
+    assert not failed_thread.is_alive()
+    failed = session.snapshot()
+
+    assert transport.simulated_publish_attempts == 1
+    assert failed["state"] == "failed"
+    assert failed["outcome_unknown"] is True
+    assert failed["can_open"] is False
+    failure = failed["failure"]
+    assert isinstance(failure, dict)
+    assert failure["transport_state"] is None
+    assert failure["publish_attempts"] is None
+    assert failure["diagnostic_snapshot_unavailable"] == ["transport"]
+    assert failure["diagnostic_evidence_unavailable"] == ["transport.publish_attempts"]
+    assert failure["modeling_command_attempted"] is False
+    assert failure["safe_to_retry"] is False
+    with pytest.raises(
+        session_module.ApplicationAcceptanceError,
+        match="already open or requires manual recovery",
+    ):
+        session.open(
+            host="192.168.1.20",
+            timezone_name="Europe/Moscow",
+            confirmation=_confirmation(),
+        )
+
+
+def test_unavailable_dialogue_snapshot_is_outcome_unknown(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    class DialogueSnapshotFailureExecutor(FakeExecutor):
+        def run_connection_stage(
+            self,
+            _orchestrator: object,
+        ) -> LiveDeviceControlBinding:
+            raise RuntimeError("bootstrap failed with unavailable dialogue evidence")
+
+        def snapshot(self) -> dict[str, object]:
+            raise RuntimeError("simulated dialogue snapshot failure")
+
+    monkeypatch.setattr(
+        session_module,
+        "PhysicalAcceptanceDialogueExecutor",
+        DialogueSnapshotFailureExecutor,
+    )
+    session = InteractiveApplicationControlSession(
+        FakeAuthorityLoader(),
+        transport_factory=lambda host: FakeTransport(host),  # type: ignore[arg-type]
+    )
+
+    session.open(
+        host="192.168.1.20",
+        timezone_name="Europe/Moscow",
+        confirmation=_confirmation(),
+    )
+    failed_thread = session._thread  # noqa: SLF001
+    assert failed_thread is not None
+    failed_thread.join(timeout=2.0)
+    assert not failed_thread.is_alive()
+    failed = session.snapshot()
+
+    assert failed["state"] == "failed"
+    assert failed["outcome_unknown"] is True
+    assert failed["can_open"] is False
+    failure = failed["failure"]
+    assert isinstance(failure, dict)
+    assert failure["publish_attempts"] == 0
+    assert failure["modeling_command_attempted"] is None
+    assert failure["diagnostic_snapshot_unavailable"] == ["dialogue"]
+    assert failure["diagnostic_evidence_unavailable"] == ["dialogue.modeling_command_attempted"]
+    assert failure["safe_to_retry"] is False
+
+
+def test_pretransport_authority_failure_remains_safe_after_worker_retirement() -> None:
+    class FailingAuthorityLoader(FakeAuthorityLoader):
+        def load(self) -> ApplicationControlAuthority:
+            self.calls += 1
+            raise RuntimeError("authority unavailable before transport creation")
+
+    transport_factory_calls = 0
+
+    def transport_factory(host: str) -> FakeTransport:
+        nonlocal transport_factory_calls
+        transport_factory_calls += 1
+        return FakeTransport(host)
+
+    session = InteractiveApplicationControlSession(
+        FailingAuthorityLoader(),
+        transport_factory=transport_factory,  # type: ignore[arg-type]
+    )
+
+    session.open(
+        host="192.168.1.20",
+        timezone_name="Europe/Moscow",
+        confirmation=_confirmation(),
+    )
+    failed_thread = session._thread  # noqa: SLF001
+    assert failed_thread is not None
+    failed_thread.join(timeout=2.0)
+    assert not failed_thread.is_alive()
+    failed = session.snapshot()
+
+    assert transport_factory_calls == 0
+    assert failed["state"] == "failed"
+    assert failed["outcome_unknown"] is False
+    assert failed["can_open"] is True
+    failure = failed["failure"]
+    assert isinstance(failure, dict)
+    assert failure["publish_attempts"] is None
+    assert failure["modeling_command_attempted"] is False
+    assert failure["diagnostic_snapshot_unavailable"] == []
+    assert failure["diagnostic_evidence_unavailable"] == []
+    assert failure["safe_to_retry"] is True
diff --git a/tests/test_xgrids_camera_gateway.py b/tests/test_xgrids_camera_gateway.py
index e7e0bc0..a476eff 100644
--- a/tests/test_xgrids_camera_gateway.py
+++ b/tests/test_xgrids_camera_gateway.py
@@ -64,6 +64,23 @@ def _burst_ffmpeg(tmp_path: Path) -> Path:
     return executable
 
 
+def _clean_source_end_ffmpeg(tmp_path: Path) -> Path:
+    executable = tmp_path / "clean-source-end-ffmpeg"
+    executable.write_text(
+        f"#!{sys.executable}\n"
+        "import sys, time\n"
+        "def box(kind, payload=b''):\n"
+        "    return (8 + len(payload)).to_bytes(4, 'big') + kind + payload\n"
+        "sys.stdout.buffer.write(box(b'ftyp', b'isom') + box(b'moov'))\n"
+        "sys.stdout.buffer.write(box(b'moof') + box(b'mdat', b'final-frame'))\n"
+        "sys.stdout.buffer.flush()\n"
+        "time.sleep(0.15)\n",
+        encoding="utf-8",
+    )
+    executable.chmod(0o700)
+    return executable
+
+
 def _buffered_tail_ffmpeg(tmp_path: Path, sentinel: Path, *, fragments: int) -> Path:
     executable = tmp_path / "buffered-tail-ffmpeg"
     executable.write_text(
@@ -289,6 +306,76 @@ def test_acquisition_records_without_browser_and_source_switch_seals_epochs(
         gateway.close()
 
 
+def test_expected_camera_source_end_during_device_stop_seals_complete_epoch(
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.setenv(
+        "MISSIONCORE_FFMPEG_BINARY",
+        str(_clean_source_end_ffmpeg(tmp_path)),
+    )
+    gateway = XgridsK1CameraGateway(tmp_path, XGRIDS_K1_PLUGIN_ID)
+    session = tmp_path / "session"
+    session.mkdir()
+    try:
+        selected = gateway.select("sensor.camera.left", "192.168.1.20")
+        gateway.start_recording(session)
+        gateway.expect_source_end_for_device_stop()
+
+        _wait_until(
+            lambda: gateway.snapshot()["recording"]["completed_epochs"] == 1,
+        )
+        state = gateway.snapshot()
+        assert state["phase"] == "idle"
+        assert state["error"] is None
+        assert state["delivery"] is None
+        assert state["recording"]["active"] is True
+        assert state["recording"]["source_end_expected"] is False
+
+        gateway.stop_recording(status="complete")
+        epoch = (
+            session
+            / "media"
+            / "sensor.camera.left"
+            / f"epoch-{selected['generation']}"
+        )
+        summary = json.loads((epoch / "summary.json").read_text(encoding="utf-8"))
+        assert summary["status"] == "complete"
+        assert summary["failure_code"] is None
+        assert summary["media_segment_count"] == 1
+    finally:
+        gateway.close()
+
+
+def test_unexpected_camera_source_end_remains_a_recording_failure(
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    monkeypatch.setenv(
+        "MISSIONCORE_FFMPEG_BINARY",
+        str(_clean_source_end_ffmpeg(tmp_path)),
+    )
+    gateway = XgridsK1CameraGateway(tmp_path, XGRIDS_K1_PLUGIN_ID)
+    session = tmp_path / "session"
+    session.mkdir()
+    try:
+        selected = gateway.select("sensor.camera.left", "192.168.1.20")
+        gateway.start_recording(session)
+
+        _wait_until(lambda: gateway.snapshot()["phase"] == "error")
+        epoch = (
+            session
+            / "media"
+            / "sensor.camera.left"
+            / f"epoch-{selected['generation']}"
+        )
+        summary = json.loads((epoch / "summary.json").read_text(encoding="utf-8"))
+        assert summary["status"] == "interrupted"
+        assert summary["failure_code"] == "camera-source-ended"
+    finally:
+        gateway.close()
+
+
 def test_camera_storage_open_failure_is_loud_and_never_starts_ffmpeg(
     tmp_path: Path,
     monkeypatch: pytest.MonkeyPatch,
@@ -501,7 +588,8 @@ def test_service_publishes_two_dynamic_camera_rows_and_stale_stop_is_safe(
             service._compatibility_attestation = {
                 "firmware_version": "3.0.2",
                 "topology": "direct-lan",
-                "basis": "operator-attested",
+                "verification": "live-device-info",
+                "basis": "selected-profile-live-device-info-required",
                 "observed_at": "2026-07-16T20:00:00Z",
             }
 
diff --git a/tests/test_xgrids_compatibility_profile.py b/tests/test_xgrids_compatibility_profile.py
index 91ce2f8..386d324 100644
--- a/tests/test_xgrids_compatibility_profile.py
+++ b/tests/test_xgrids_compatibility_profile.py
@@ -48,6 +48,7 @@ def test_xgrids_compatibility_profile_loads_exact_firmware_and_sources() -> None
     assert profile["profile_id"] == "xgrids.lixelkity-k1.fw-3.0.2.direct-lan.v1"
     assert profile["scope"]["vendor"] == "XGRIDS"
     assert profile["scope"]["model"] == "LixelKity K1"
+    assert profile["scope"]["platform_type"] == "A4"
     assert profile["scope"]["firmware"] == {"match": "exact", "version": "3.0.2"}
     assert profile["scope"]["topology"] == "direct-lan"
     assert LOADER.matches_target(profile, firmware="3.0.2", topology="direct-lan")
@@ -146,6 +147,15 @@ def test_xgrids_compatibility_profile_maps_actions_without_enabling_writes() ->
     assert profile["safety"]["default_mode"] == "read-only"
     assert profile["safety"]["vendor_writes_enabled"] is False
     assert control["mode"] == "operator-manual"
+    assert control["software_acceptance_transport"] == {
+        "status": "installed-operator-present",
+        "default_authority": "disabled",
+        "profile_gate": "live-device-info-exact-match",
+        "dialogue": "single-socket-canonical-start-to-stop",
+        "automatic_retry": False,
+        "supported_mount_type": "handheld",
+        "supported_gnss_mode": "none",
+    }
     assert control["verified_device_control"]["gesture"] == "physical-double-click"
 
     for action_id, action_code in (("acquisition.start", 1), ("acquisition.stop", 2)):
diff --git a/tests/test_xgrids_modeling_safety.py b/tests/test_xgrids_modeling_safety.py
index 0fa36fc..f548ec4 100644
--- a/tests/test_xgrids_modeling_safety.py
+++ b/tests/test_xgrids_modeling_safety.py
@@ -75,7 +75,7 @@ def _binding(**changes: object) -> LiveDeviceControlBinding:
         "software_version": "V3.0.2-build.1",
         "system_version": "V3.0.2",
         "device_model": "LixelKity K1",
-        "device_type": "K1",
+        "device_type": "A4",
         "is_activated": True,
     }
     values.update(changes)