callstack
diff --git a/‎packages/contracts/package.json‎
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diff --git a/‎packages/contracts/src/back-runtime.test.ts‎
Lines changed: 87 additions & 0 deletions b/‎packages/contracts/src/back-runtime.test.ts‎
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diff --git a/‎packages/contracts/src/back-runtime.ts‎
Lines changed: 86 additions & 0 deletions b/‎packages/contracts/src/back-runtime.ts‎
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diff --git a/‎packages/contracts/src/facades/interaction.ts‎
Lines changed: 3 additions & 0 deletions b/‎packages/contracts/src/facades/interaction.ts‎
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diff --git a/‎packages/contracts/src/facades/platform.ts‎
Lines changed: 79 additions & 0 deletions b/‎packages/contracts/src/facades/platform.ts‎
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@@ -76,6 +76,10 @@
       "types": "./src/back-mode.ts",
       "default": "./src/back-mode.ts"
     },
+    "./back-runtime": {
+      "types": "./src/back-runtime.ts",
+      "default": "./src/back-runtime.ts"
+    },
     "./capture": {
       "types": "./src/facades/capture.ts",
       "default": "./src/facades/capture.ts"
@@ -144,6 +148,10 @@
       "types": "./src/gesture-plan-types.ts",
       "default": "./src/gesture-plan-types.ts"
     },
+    "./home-runtime": {
+      "types": "./src/home-runtime.ts",
+      "default": "./src/home-runtime.ts"
+    },
     "./interaction": {
       "types": "./src/facades/interaction.ts",
       "default": "./src/facades/interaction.ts"
@@ -156,10 +164,18 @@
       "types": "./src/interaction-guarantees.ts",
       "default": "./src/interaction-guarantees.ts"
     },
+    "./interactor-operation-catalog": {
+      "types": "./src/interactor-operation-catalog.ts",
+      "default": "./src/interactor-operation-catalog.ts"
+    },
     "./interactor-types": {
       "types": "./src/interactor-types.ts",
       "default": "./src/interactor-types.ts"
     },
+    "./keyboard-runtime": {
+      "types": "./src/keyboard-runtime.ts",
+      "default": "./src/keyboard-runtime.ts"
+    },
     "./logs-runtime-plan": {
       "types": "./src/logs-runtime-plan.ts",
       "default": "./src/logs-runtime-plan.ts"
@@ -180,6 +196,10 @@
       "types": "./src/facades/observability.ts",
       "default": "./src/facades/observability.ts"
     },
+    "./orientation-runtime": {
+      "types": "./src/orientation-runtime.ts",
+      "default": "./src/orientation-runtime.ts"
+    },
     "./platform": {
       "types": "./src/facades/platform.ts",
       "default": "./src/facades/platform.ts"
@@ -272,6 +292,10 @@
       "types": "./src/tv-remote.ts",
       "default": "./src/tv-remote.ts"
     },
+    "./tv-remote-runtime": {
+      "types": "./src/tv-remote-runtime.ts",
+      "default": "./src/tv-remote-runtime.ts"
+    },
     "./type-text-runtime": {
       "types": "./src/type-text-runtime.ts",
       "default": "./src/type-text-runtime.ts"
 
@@ -0,0 +1,87 @@
+import { expect, test, vi } from 'vitest';
+import {
+  bindLocalBackInteractor,
+  bindProviderBackInteractor,
+  backRuntimeOperationFacts,
+} from './back-runtime.ts';
+import type { Interactor } from './interactor-types.ts';
+
+const device = {
+  platform: 'android',
+  id: 'emulator-5554',
+  name: 'Pixel',
+  kind: 'emulator',
+  booted: true,
+} as const;
+
+test('builds the exact back operation fact catalog', () => {
+  const back = { available: true } as const;
+  expect(backRuntimeOperationFacts({ back })).toEqual({ back });
+});
+
+test('a local binding drives the interactor with the requested mode', async () => {
+  const back = vi.fn(async () => undefined);
+  const resolveInteractor = vi.fn(async () => ({ back }) as unknown as Interactor);
+  const signal = new AbortController().signal;
+
+  const operations = bindLocalBackInteractor({ device, signal, resolveInteractor });
+  await operations.back({
+    mode: 'system',
+    options: { appBundleId: 'com.example.app' },
+    execution: { logPath: '/tmp/daemon.log', requestId: 'back-1' },
+  });
+
+  expect(resolveInteractor).toHaveBeenCalledWith(device, {
+    logPath: '/tmp/daemon.log',
+    requestId: 'back-1',
+    appBundleId: 'com.example.app',
+    signal,
+  });
+  expect(back).toHaveBeenCalledWith('system');
+});
+
+test('a provider binding drives its own resolved interactor', async () => {
+  const back = vi.fn(async () => undefined);
+  const resolveInteractor = vi.fn(() => ({ back }) as unknown as Interactor);
+  const signal = new AbortController().signal;
+
+  const operations = bindProviderBackInteractor({ device, signal, resolveInteractor });
+  await operations.back({ execution: { requestId: 'back-2' } });
+
+  expect(resolveInteractor).toHaveBeenCalledWith({
+    requestId: 'back-2',
+    appBundleId: undefined,
+    signal,
+  });
+  expect(back).toHaveBeenCalledWith(undefined);
+});
+
+test('a provider binding fails closed when its exact owner exposes no interactor', async () => {
+  const operations = bindProviderBackInteractor({
+    device,
+    signal: new AbortController().signal,
+    resolveInteractor: () => undefined,
+  });
+
+  await expect(operations.back({})).rejects.toMatchObject({
+    code: 'UNSUPPORTED_OPERATION',
+    details: { reason: 'provider-runtime-interactor-missing', deviceId: device.id },
+  });
+});
+
+test('an already-cancelled request never resolves an interactor', async () => {
+  const controller = new AbortController();
+  controller.abort();
+  const back = vi.fn(async () => undefined);
+  const resolveInteractor = vi.fn(async () => ({ back }) as unknown as Interactor);
+
+  const operations = bindLocalBackInteractor({
+    device,
+    signal: controller.signal,
+    resolveInteractor,
+  });
+
+  await expect(operations.back({})).rejects.toThrow();
+  expect(resolveInteractor).not.toHaveBeenCalled();
+  expect(back).not.toHaveBeenCalled();
+});
@@ -0,0 +1,86 @@
+import type { DeviceInfo } from '@agent-device/kernel/device';
+import {
+  localInteractorSource,
+  providerInteractorSource,
+  type LocalInteractorOperationResolver,
+  type ProviderInteractorOperationResolver,
+} from './interactor-operation-binding.ts';
+import type { BackMode, Interactor, RunnerContext } from './interactor-types.ts';
+import type { RuntimeOperationFact } from './platform-runtime.ts';
+import type { SnapshotRuntimeExecution } from './snapshot-runtime.ts';
+
+/**
+ * Neutral intent for one back navigation. `mode` is already validated by the caller (the
+ * `--mode` flag); the operation names no command, request, session, or CLI flag.
+ */
+export type BackInput = Readonly<{
+  mode?: BackMode;
+  options?: Readonly<{ appBundleId?: string }>;
+  /** Same runner metadata a capture needs; reuses that type rather than restating it. */
+  execution?: SnapshotRuntimeExecution;
+}>;
+
+/**
+ * Back returns nothing. The legacy leaf discarded whatever the interactor answered and reported
+ * only the mode it requested, so a result type here would be a surface the command never had.
+ */
+export type BackRuntimeOperations = Readonly<{
+  back(input: BackInput): Promise<void>;
+}>;
+
+export type BackRuntimeOperationFacts = Readonly<{
+  back: RuntimeOperationFact;
+}>;
+
+export function backRuntimeOperationFacts(
+  input: Readonly<{ back: RuntimeOperationFact }>,
+): BackRuntimeOperationFacts {
+  return Object.freeze({ back: input.back });
+}
+
+/**
+ * Captures one selected owner's interactor authority for the lifetime of a request binding. The
+ * owner is already chosen by the time a binder is called, so each entry point supplies its own
+ * resolution and this holds only what both share: the runner context and the navigation itself.
+ */
+function bindBack(
+  signal: AbortSignal,
+  resolveInteractor: (runner: RunnerContext) => Promise<Interactor>,
+): BackRuntimeOperations {
+  return Object.freeze({
+    back: async (input: BackInput) => {
+      signal.throwIfAborted();
+      const interactor = await resolveInteractor({
+        ...input.execution,
+        appBundleId: input.options?.appBundleId,
+        signal,
+      });
+      await interactor.back(input.mode);
+    },
+  });
+}
+
+export type LocalBackInteractorResolver = LocalInteractorOperationResolver;
+
+export function bindLocalBackInteractor(
+  params: Readonly<{
+    device: DeviceInfo;
+    signal: AbortSignal;
+    resolveInteractor: LocalBackInteractorResolver;
+  }>,
+): BackRuntimeOperations {
+  return bindBack(params.signal, localInteractorSource(params));
+}
+
+export type ProviderBackInteractorResolver = ProviderInteractorOperationResolver;
+
+/** Provider bindings fail closed when their exact owner no longer exposes its interactor. */
+export function bindProviderBackInteractor(
+  params: Readonly<{
+    device: DeviceInfo;
+    signal: AbortSignal;
+    resolveInteractor: ProviderBackInteractorResolver;
+  }>,
+): BackRuntimeOperations {
+  return bindBack(params.signal, providerInteractorSource({ ...params, operation: 'back' }));
+}
@@ -123,6 +123,9 @@ export type {
   FillUnconfirmedVerification,
   FillVerificationTarget,
   Interactor,
+  KeyboardDismissResult,
+  KeyboardEnterResult,
+  KeyboardStatusResult,
   RunnerCallOptions,
   RunnerContext,
   ScreenshotOptions,
 
@@ -225,6 +225,14 @@ export {
   focusRuntimeUse,
   typeTextRuntimeUse,
   viewportRuntimeUse,
+  backRuntimeUse,
+  homeRuntimeUse,
+  orientationRuntimeUse,
+  tvRemoteRuntimeUse,
+  keyboardRuntimePlanUses,
+  keyboardStatusUse,
+  keyboardDismissUse,
+  keyboardEnterUse,
 } from '../platform-runtime-operations.ts';
 export type {
   ScreenshotRuntimePlan,
@@ -315,6 +323,77 @@ export type {
   TypeTextRuntimeOperationFacts,
   TypeTextRuntimeOperations,
 } from '../type-text-runtime.ts';
+export {
+  bindLocalBackInteractor,
+  bindProviderBackInteractor,
+  backRuntimeOperationFacts,
+} from '../back-runtime.ts';
+export type {
+  BackInput,
+  BackRuntimeOperationFacts,
+  BackRuntimeOperations,
+  LocalBackInteractorResolver,
+  ProviderBackInteractorResolver,
+} from '../back-runtime.ts';
+export {
+  bindLocalHomeInteractor,
+  bindProviderHomeInteractor,
+  homeRuntimeOperationFacts,
+} from '../home-runtime.ts';
+export type {
+  HomeInput,
+  HomeRuntimeOperationFacts,
+  HomeRuntimeOperations,
+  LocalHomeInteractorResolver,
+  ProviderHomeInteractorResolver,
+} from '../home-runtime.ts';
+export {
+  bindLocalOrientationInteractor,
+  bindProviderOrientationInteractor,
+  orientationRuntimeOperationFacts,
+} from '../orientation-runtime.ts';
+export type {
+  LocalOrientationInteractorResolver,
+  OrientationRuntimeOperationFacts,
+  OrientationRuntimeOperations,
+  ProviderOrientationInteractorResolver,
+  SetOrientationInput,
+  SetOrientationResult,
+} from '../orientation-runtime.ts';
+export {
+  bindLocalTvRemoteInteractor,
+  bindProviderTvRemoteInteractor,
+  tvRemoteRuntimeOperationFacts,
+} from '../tv-remote-runtime.ts';
+export type {
+  LocalTvRemoteInteractorResolver,
+  ProviderTvRemoteInteractorResolver,
+  TvRemoteInput,
+  TvRemoteRuntimeOperationFacts,
+  TvRemoteRuntimeOperations,
+} from '../tv-remote-runtime.ts';
+export {
+  bindLocalKeyboardStatusInteractor,
+  bindProviderKeyboardStatusInteractor,
+  bindLocalKeyboardDismissInteractor,
+  bindProviderKeyboardDismissInteractor,
+  bindLocalKeyboardEnterInteractor,
+  bindProviderKeyboardEnterInteractor,
+  keyboardRuntimeOperationFacts,
+} from '../keyboard-runtime.ts';
+export type {
+  KeyboardActionInput,
+  KeyboardDismissResult,
+  KeyboardDismissRuntimeOperations,
+  KeyboardEnterResult,
+  KeyboardEnterRuntimeOperations,
+  KeyboardRuntimeOperationFacts,
+  KeyboardRuntimeOperations,
+  KeyboardStatusResult,
+  KeyboardStatusRuntimeOperations,
+  LocalKeyboardInteractorResolver,
+  ProviderKeyboardInteractorResolver,
+} from '../keyboard-runtime.ts';
 export { viewportRuntimeOperationFacts } from '../viewport-runtime.ts';
 export type {
   SetViewportInput,