diff --git a/src/QueryEngine.ts b/src/QueryEngine.ts
index 0a80c61..8a59710 100644
--- a/src/QueryEngine.ts
+++ b/src/QueryEngine.ts
@@ -13,7 +13,7 @@ import type {
   SDKPermissionDenial,
   SDKStatus,
   SDKUserMessageReplay,
-} from 'src/entrypoints/agentSdkTypes.js'
+} from 'src/entrypoints/agentSdkTypes.ts'
 import { accumulateUsage, updateUsage } from 'src/services/api/claude.js'
 import type { NonNullableUsage } from 'src/services/api/logging.js'
 import { EMPTY_USAGE } from 'src/services/api/logging.js'
diff --git a/src/Tool.ts b/src/Tool.ts
index 205cac0..e41598a 100644
--- a/src/Tool.ts
+++ b/src/Tool.ts
@@ -74,7 +74,7 @@ export type {
 
 import type { SpinnerMode } from './components/Spinner.js'
 import type { QuerySource } from './constants/querySource.js'
-import type { SDKStatus } from './entrypoints/agentSdkTypes.js'
+import type { SDKStatus } from './entrypoints/agentSdkTypes.ts'
 import type { AppState } from './state/AppState.js'
 import type {
   HookProgress,
diff --git a/src/assistant/sessionHistory.ts b/src/assistant/sessionHistory.ts
index 9e1ddc5..6b48289 100644
--- a/src/assistant/sessionHistory.ts
+++ b/src/assistant/sessionHistory.ts
@@ -1,6 +1,6 @@
 import axios from 'axios'
 import { getOauthConfig } from '../constants/oauth.js'
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import { logForDebugging } from '../utils/debug.js'
 import { getOAuthHeaders, prepareApiRequest } from '../utils/teleport/api.js'
 
diff --git a/src/bootstrap/state.ts b/src/bootstrap/state.ts
index d7199e5..f7fbf0d 100644
--- a/src/bootstrap/state.ts
+++ b/src/bootstrap/state.ts
@@ -7,7 +7,7 @@ import type { BasicTracerProvider } from '@opentelemetry/sdk-trace-base'
 import { realpathSync } from 'fs'
 import sumBy from 'lodash-es/sumBy.js'
 import { cwd } from 'process'
-import type { HookEvent, ModelUsage } from 'src/entrypoints/agentSdkTypes.js'
+import type { HookEvent, ModelUsage } from 'src/entrypoints/agentSdkTypes.ts'
 import type { AgentColorName } from 'src/tools/AgentTool/agentColorManager.js'
 import type { HookCallbackMatcher } from 'src/types/hooks.js'
 // Indirection for browser-sdk build (package.json "browser" field swaps
diff --git a/src/bridge/bridgeMessaging.ts b/src/bridge/bridgeMessaging.ts
index f6b6490..81f655f 100644
--- a/src/bridge/bridgeMessaging.ts
+++ b/src/bridge/bridgeMessaging.ts
@@ -11,7 +11,7 @@
  */
 
 import { randomUUID } from 'crypto'
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import type {
   SDKControlRequest,
   SDKControlResponse,
diff --git a/src/bridge/createSession.ts b/src/bridge/createSession.ts
index d5bc83a..ae17f7b 100644
--- a/src/bridge/createSession.ts
+++ b/src/bridge/createSession.ts
@@ -1,4 +1,4 @@
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import { logForDebugging } from '../utils/debug.js'
 import { errorMessage } from '../utils/errors.js'
 import { extractErrorDetail } from './debugUtils.js'
diff --git a/src/bridge/inboundMessages.ts b/src/bridge/inboundMessages.ts
index 2c02f50..4c50c35 100644
--- a/src/bridge/inboundMessages.ts
+++ b/src/bridge/inboundMessages.ts
@@ -4,7 +4,7 @@ import type {
   ImageBlockParam,
 } from '@anthropic-ai/sdk/resources/messages.mjs'
 import type { UUID } from 'crypto'
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import { detectImageFormatFromBase64 } from '../utils/imageResizer.js'
 
 /**
diff --git a/src/bridge/initReplBridge.ts b/src/bridge/initReplBridge.ts
index 6224950..9bae291 100644
--- a/src/bridge/initReplBridge.ts
+++ b/src/bridge/initReplBridge.ts
@@ -16,7 +16,7 @@
 import { feature } from 'bun:bundle'
 import { hostname } from 'os'
 import { getOriginalCwd, getSessionId } from '../bootstrap/state.js'
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import type { SDKControlResponse } from '../entrypoints/sdk/controlTypes.ts'
 import { getFeatureValue_CACHED_WITH_REFRESH } from '../services/analytics/growthbook.js'
 import { getOrganizationUUID } from '../services/oauth/client.js'
diff --git a/src/bridge/remoteBridgeCore.ts b/src/bridge/remoteBridgeCore.ts
index 38f4aaa..9ecf15a 100644
--- a/src/bridge/remoteBridgeCore.ts
+++ b/src/bridge/remoteBridgeCore.ts
@@ -64,7 +64,7 @@ import {
 } from '../services/analytics/index.js'
 import type { ReplBridgeHandle, BridgeState } from './replBridge.js'
 import type { Message } from '../types/message.js'
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import type {
   SDKControlRequest,
   SDKControlResponse,
diff --git a/src/bridge/replBridge.ts b/src/bridge/replBridge.ts
index 1f46df7..d3fd959 100644
--- a/src/bridge/replBridge.ts
+++ b/src/bridge/replBridge.ts
@@ -46,7 +46,7 @@ import {
   logBridgeSkip,
 } from './debugUtils.js'
 import type { Message } from '../types/message.js'
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import type { PermissionMode } from '../utils/permissions/PermissionMode.js'
 import type {
   SDKControlRequest,
diff --git a/src/components/hooks/HooksConfigMenu.tsx b/src/components/hooks/HooksConfigMenu.tsx
index ea39f82..a4dd493 100644
--- a/src/components/hooks/HooksConfigMenu.tsx
+++ b/src/components/hooks/HooksConfigMenu.tsx
@@ -13,7 +13,7 @@ import { c as _c } from "react/compiler-runtime";
  */
 import * as React from 'react';
 import { useCallback, useMemo, useState } from 'react';
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js';
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts';
 import { useAppState, useAppStateStore } from 'src/state/AppState.js';
 import type { CommandResultDisplay } from '../../commands.js';
 import { useSettingsChange } from '../../hooks/useSettingsChange.js';
diff --git a/src/components/hooks/SelectEventMode.tsx b/src/components/hooks/SelectEventMode.tsx
index f07e647..ea9567b 100644
--- a/src/components/hooks/SelectEventMode.tsx
+++ b/src/components/hooks/SelectEventMode.tsx
@@ -10,7 +10,7 @@ import { c as _c } from "react/compiler-runtime";
 
 import figures from 'figures';
 import * as React from 'react';
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js';
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts';
 import type { HookEventMetadata } from 'src/utils/hooks/hooksConfigManager.js';
 import { Box, Link, Text } from '../../ink.js';
 import { plural } from '../../utils/stringUtils.js';
diff --git a/src/components/hooks/SelectHookMode.tsx b/src/components/hooks/SelectHookMode.tsx
index cec6c6a..5fa650a 100644
--- a/src/components/hooks/SelectHookMode.tsx
+++ b/src/components/hooks/SelectHookMode.tsx
@@ -7,7 +7,7 @@ import { c as _c } from "react/compiler-runtime";
  * confirmation.
  */
 import * as React from 'react';
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js';
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts';
 import type { HookEventMetadata } from 'src/utils/hooks/hooksConfigManager.js';
 import { Box, Text } from '../../ink.js';
 import { getHookDisplayText, hookSourceHeaderDisplayString, type IndividualHookConfig } from '../../utils/hooks/hooksSettings.js';
diff --git a/src/components/hooks/SelectMatcherMode.tsx b/src/components/hooks/SelectMatcherMode.tsx
index d292fc8..10d04f4 100644
--- a/src/components/hooks/SelectMatcherMode.tsx
+++ b/src/components/hooks/SelectMatcherMode.tsx
@@ -6,7 +6,7 @@ import { c as _c } from "react/compiler-runtime";
  * and simply lets the user drill into each matcher to see its hooks.
  */
 import * as React from 'react';
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js';
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts';
 import { Box, Text } from '../../ink.js';
 import { type HookSource, hookSourceInlineDisplayString, type IndividualHookConfig } from '../../utils/hooks/hooksSettings.js';
 import { plural } from '../../utils/stringUtils.js';
diff --git a/src/components/messages/HookProgressMessage.tsx b/src/components/messages/HookProgressMessage.tsx
index 2e6ca1c..24d3993 100644
--- a/src/components/messages/HookProgressMessage.tsx
+++ b/src/components/messages/HookProgressMessage.tsx
@@ -1,6 +1,6 @@
 import { c as _c } from "react/compiler-runtime";
 import * as React from 'react';
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js';
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts';
 import type { buildMessageLookups } from 'src/utils/messages.js';
 import { Box, Text } from '../../ink.js';
 import { MessageResponse } from '../MessageResponse.js';
diff --git a/src/components/tasks/RemoteSessionDetailDialog.tsx b/src/components/tasks/RemoteSessionDetailDialog.tsx
index 153cd7a..6ecbe8f 100644
--- a/src/components/tasks/RemoteSessionDetailDialog.tsx
+++ b/src/components/tasks/RemoteSessionDetailDialog.tsx
@@ -1,7 +1,7 @@
 import { c as _c } from "react/compiler-runtime";
 import figures from 'figures';
 import React, { useMemo, useState } from 'react';
-import type { SDKMessage } from 'src/entrypoints/agentSdkTypes.js';
+import type { SDKMessage } from 'src/entrypoints/agentSdkTypes.ts';
 import type { ToolUseContext } from 'src/Tool.js';
 import type { DeepImmutable } from 'src/types/utils.js';
 import type { CommandResultDisplay } from '../../commands.js';
diff --git a/src/cost-tracker.ts b/src/cost-tracker.ts
index b03184c..7da8b91 100644
--- a/src/cost-tracker.ts
+++ b/src/cost-tracker.ts
@@ -27,7 +27,7 @@ import {
   setCostStateForRestore,
   setHasUnknownModelCost,
 } from './bootstrap/state.js'
-import type { ModelUsage } from './entrypoints/agentSdkTypes.js'
+import type { ModelUsage } from './entrypoints/agentSdkTypes.ts'
 import {
   type AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
   logEvent,
diff --git a/src/hooks/useReplBridge.tsx b/src/hooks/useReplBridge.tsx
index 535c0f8..5945798 100644
--- a/src/hooks/useReplBridge.tsx
+++ b/src/hooks/useReplBridge.tsx
@@ -10,7 +10,7 @@ import type { Command } from '../commands.js';
 import { getSlashCommandToolSkills, isBridgeSafeCommand } from '../commands.js';
 import { getRemoteSessionUrl } from '../constants/product.js';
 import { useNotifications } from '../context/notifications.js';
-import type { PermissionMode, SDKMessage } from '../entrypoints/agentSdkTypes.js';
+import type { PermissionMode, SDKMessage } from '../entrypoints/agentSdkTypes.ts';
 import type { SDKControlResponse } from '../entrypoints/sdk/controlTypes.ts';
 import { Text } from '../ink.js';
 import { getFeatureValue_CACHED_MAY_BE_STALE } from '../services/analytics/growthbook.js';
diff --git a/src/remote/RemoteSessionManager.ts b/src/remote/RemoteSessionManager.ts
index cd1ad20..0b46911 100644
--- a/src/remote/RemoteSessionManager.ts
+++ b/src/remote/RemoteSessionManager.ts
@@ -1,4 +1,4 @@
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import type {
   SDKControlCancelRequest,
   SDKControlPermissionRequest,
diff --git a/src/remote/SessionsWebSocket.ts b/src/remote/SessionsWebSocket.ts
index 24d4940..c083ce8 100644
--- a/src/remote/SessionsWebSocket.ts
+++ b/src/remote/SessionsWebSocket.ts
@@ -1,6 +1,6 @@
 import { randomUUID } from 'crypto'
 import { getOauthConfig } from '../constants/oauth.js'
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import type {
   SDKControlCancelRequest,
   SDKControlRequest,
diff --git a/src/remote/sdkMessageAdapter.ts b/src/remote/sdkMessageAdapter.ts
index a6cbe0f..da5bfe7 100644
--- a/src/remote/sdkMessageAdapter.ts
+++ b/src/remote/sdkMessageAdapter.ts
@@ -7,7 +7,7 @@ import type {
   SDKStatusMessage,
   SDKSystemMessage,
   SDKToolProgressMessage,
-} from '../entrypoints/agentSdkTypes.js'
+} from '../entrypoints/agentSdkTypes.ts'
 import type {
   AssistantMessage,
   Message,
diff --git a/src/schemas/hooks.ts b/src/schemas/hooks.ts
index 280bcb1..8f6ae4d 100644
--- a/src/schemas/hooks.ts
+++ b/src/schemas/hooks.ts
@@ -8,7 +8,7 @@
  * Both files now import from this shared location instead of each other.
  */
 
-import { HOOK_EVENTS, type HookEvent } from 'src/entrypoints/agentSdkTypes.js'
+import { HOOK_EVENTS, type HookEvent } from 'src/entrypoints/agentSdkTypes.ts'
 import { z } from 'zod/v4'
 import { lazySchema } from '../utils/lazySchema.js'
 import { SHELL_TYPES } from '../utils/shell/shellProvider.js'
diff --git a/src/server/directConnectManager.ts b/src/server/directConnectManager.ts
index 690a68e..1a00dab 100644
--- a/src/server/directConnectManager.ts
+++ b/src/server/directConnectManager.ts
@@ -1,6 +1,6 @@
 /* eslint-disable eslint-plugin-n/no-unsupported-features/node-builtins */
 
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts'
 import type {
   SDKControlPermissionRequest,
   StdoutMessage,
diff --git a/src/services/api/errors.ts b/src/services/api/errors.ts
index 1a7edc5..89ad7fe 100644
--- a/src/services/api/errors.ts
+++ b/src/services/api/errors.ts
@@ -8,7 +8,7 @@ import type {
   BetaStopReason,
 } from '@anthropic-ai/sdk/resources/beta/messages/messages.mjs'
 import { AFK_MODE_BETA_HEADER } from 'src/constants/betas.js'
-import type { SDKAssistantMessageError } from 'src/entrypoints/agentSdkTypes.js'
+import type { SDKAssistantMessageError } from 'src/entrypoints/agentSdkTypes.ts'
 import type {
   AssistantMessage,
   Message,
diff --git a/src/tasks/RemoteAgentTask/RemoteAgentTask.tsx b/src/tasks/RemoteAgentTask/RemoteAgentTask.tsx
index 6afa998..6949774 100644
--- a/src/tasks/RemoteAgentTask/RemoteAgentTask.tsx
+++ b/src/tasks/RemoteAgentTask/RemoteAgentTask.tsx
@@ -1,7 +1,7 @@
 import type { ToolUseBlock } from '@anthropic-ai/sdk/resources';
 import { getRemoteSessionUrl } from '../../constants/product.js';
 import { OUTPUT_FILE_TAG, REMOTE_REVIEW_PROGRESS_TAG, REMOTE_REVIEW_TAG, STATUS_TAG, SUMMARY_TAG, TASK_ID_TAG, TASK_NOTIFICATION_TAG, TASK_TYPE_TAG, TOOL_USE_ID_TAG, ULTRAPLAN_TAG } from '../../constants/xml.js';
-import type { SDKAssistantMessage, SDKMessage } from '../../entrypoints/agentSdkTypes.js';
+import type { SDKAssistantMessage, SDKMessage } from '../../entrypoints/agentSdkTypes.ts';
 import type { SetAppState, Task, TaskContext, TaskStateBase } from '../../Task.js';
 import { createTaskStateBase, generateTaskId } from '../../Task.js';
 import { TodoWriteTool } from '../../tools/TodoWriteTool/TodoWriteTool.js';
diff --git a/src/types/hooks.ts b/src/types/hooks.ts
index a7808b5..13b9741 100644
--- a/src/types/hooks.ts
+++ b/src/types/hooks.ts
@@ -6,12 +6,12 @@ import {
   HOOK_EVENTS,
   type HookInput,
   type PermissionUpdate,
-} from 'src/entrypoints/agentSdkTypes.js'
+} from 'src/entrypoints/agentSdkTypes.ts'
 import type {
   HookJSONOutput,
   AsyncHookJSONOutput,
   SyncHookJSONOutput,
-} from 'src/entrypoints/agentSdkTypes.js'
+} from 'src/entrypoints/agentSdkTypes.ts'
 import type { Message } from 'src/types/message.js'
 import type { PermissionResult } from 'src/utils/permissions/PermissionResult.js'
 import { permissionBehaviorSchema } from 'src/utils/permissions/PermissionRule.js'
diff --git a/src/types/textInputTypes.ts b/src/types/textInputTypes.ts
index 1e77b56..bf50dce 100644
--- a/src/types/textInputTypes.ts
+++ b/src/types/textInputTypes.ts
@@ -1,7 +1,7 @@
 import type { ContentBlockParam } from '@anthropic-ai/sdk/resources/messages.mjs'
 import type { UUID } from 'crypto'
 import type React from 'react'
-import type { PermissionResult } from '../entrypoints/agentSdkTypes.js'
+import type { PermissionResult } from '../entrypoints/agentSdkTypes.ts'
 import type { Key } from '../ink.js'
 import type { PastedContent } from '../utils/config.js'
 import type { ImageDimensions } from '../utils/imageResizer.js'
diff --git a/src/utils/attachments.ts b/src/utils/attachments.ts
index 8a1612a..e71ce01 100644
--- a/src/utils/attachments.ts
+++ b/src/utils/attachments.ts
@@ -178,7 +178,7 @@ import type { MCPServerConnection } from '../services/mcp/types.js'
 import type {
   HookEvent,
   SyncHookJSONOutput,
-} from 'src/entrypoints/agentSdkTypes.js'
+} from 'src/entrypoints/agentSdkTypes.ts'
 import {
   checkForAsyncHookResponses,
   removeDeliveredAsyncHooks,
diff --git a/src/utils/background/remote/remoteSession.ts b/src/utils/background/remote/remoteSession.ts
index a054921..8ac297e 100644
--- a/src/utils/background/remote/remoteSession.ts
+++ b/src/utils/background/remote/remoteSession.ts
@@ -1,4 +1,4 @@
-import type { SDKMessage } from 'src/entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from 'src/entrypoints/agentSdkTypes.ts'
 import { checkGate_CACHED_OR_BLOCKING } from '../../../services/analytics/growthbook.js'
 import { isPolicyAllowed } from '../../../services/policyLimits/index.js'
 import { detectCurrentRepositoryWithHost } from '../../detectRepository.js'
diff --git a/src/utils/gracefulShutdown.ts b/src/utils/gracefulShutdown.ts
index 03e6233..1eacb29 100644
--- a/src/utils/gracefulShutdown.ts
+++ b/src/utils/gracefulShutdown.ts
@@ -2,7 +2,7 @@ import chalk from 'chalk'
 import { writeSync } from 'fs'
 import memoize from 'lodash-es/memoize.js'
 import { onExit } from 'signal-exit'
-import type { ExitReason } from 'src/entrypoints/agentSdkTypes.js'
+import type { ExitReason } from 'src/entrypoints/agentSdkTypes.ts'
 import {
   getIsInteractive,
   getIsScrollDraining,
diff --git a/src/utils/hooks.ts b/src/utils/hooks.ts
index 4198574..b92537e 100644
--- a/src/utils/hooks.ts
+++ b/src/utils/hooks.ts
@@ -106,7 +106,7 @@ import type {
   ExitReason,
   SyncHookJSONOutput,
   AsyncHookJSONOutput,
-} from 'src/entrypoints/agentSdkTypes.js'
+} from 'src/entrypoints/agentSdkTypes.ts'
 import type { StatusLineCommandInput } from '../types/statusLine.js'
 import type { ElicitResult } from '@modelcontextprotocol/sdk/types.js'
 import type { FileSuggestionCommandInput } from '../types/fileSuggestion.js'
diff --git a/src/utils/hooks/AsyncHookRegistry.ts b/src/utils/hooks/AsyncHookRegistry.ts
index dd38719..0e33d37 100644
--- a/src/utils/hooks/AsyncHookRegistry.ts
+++ b/src/utils/hooks/AsyncHookRegistry.ts
@@ -2,7 +2,7 @@ import type {
   AsyncHookJSONOutput,
   HookEvent,
   SyncHookJSONOutput,
-} from 'src/entrypoints/agentSdkTypes.js'
+} from 'src/entrypoints/agentSdkTypes.ts'
 import { logForDebugging } from '../debug.js'
 import type { ShellCommand } from '../ShellCommand.js'
 import { invalidateSessionEnvCache } from '../sessionEnvironment.js'
diff --git a/src/utils/hooks/execAgentHook.ts b/src/utils/hooks/execAgentHook.ts
index 3282670..c5201a0 100644
--- a/src/utils/hooks/execAgentHook.ts
+++ b/src/utils/hooks/execAgentHook.ts
@@ -1,5 +1,5 @@
 import { randomUUID } from 'crypto'
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js'
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts'
 import { query } from '../../query.js'
 import { logEvent } from '../../services/analytics/index.js'
 import type { AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS } from '../../services/analytics/metadata.js'
diff --git a/src/utils/hooks/execHttpHook.ts b/src/utils/hooks/execHttpHook.ts
index b1e5822..3ccd084 100644
--- a/src/utils/hooks/execHttpHook.ts
+++ b/src/utils/hooks/execHttpHook.ts
@@ -1,5 +1,5 @@
 import axios from 'axios'
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js'
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts'
 import { createCombinedAbortSignal } from '../combinedAbortSignal.js'
 import { logForDebugging } from '../debug.js'
 import { errorMessage } from '../errors.js'
diff --git a/src/utils/hooks/execPromptHook.ts b/src/utils/hooks/execPromptHook.ts
index eb6843f..a5180ab 100644
--- a/src/utils/hooks/execPromptHook.ts
+++ b/src/utils/hooks/execPromptHook.ts
@@ -1,5 +1,5 @@
 import { randomUUID } from 'crypto'
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js'
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts'
 import { queryModelWithoutStreaming } from '../../services/api/claude.js'
 import type { ToolUseContext } from '../../Tool.js'
 import type { Message } from '../../types/message.js'
diff --git a/src/utils/hooks/hooksConfigManager.ts b/src/utils/hooks/hooksConfigManager.ts
index c7c5a0d..d79ad3b 100644
--- a/src/utils/hooks/hooksConfigManager.ts
+++ b/src/utils/hooks/hooksConfigManager.ts
@@ -1,5 +1,5 @@
 import memoize from 'lodash-es/memoize.js'
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js'
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts'
 import { getRegisteredHooks } from '../../bootstrap/state.js'
 import type { AppState } from '../../state/AppState.js'
 import {
diff --git a/src/utils/hooks/hooksSettings.ts b/src/utils/hooks/hooksSettings.ts
index b918ede..114b4a8 100644
--- a/src/utils/hooks/hooksSettings.ts
+++ b/src/utils/hooks/hooksSettings.ts
@@ -1,5 +1,5 @@
 import { resolve } from 'path'
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js'
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts'
 import { getSessionId } from '../../bootstrap/state.js'
 import type { AppState } from '../../state/AppState.js'
 import type { EditableSettingSource } from '../settings/constants.js'
diff --git a/src/utils/hooks/registerFrontmatterHooks.ts b/src/utils/hooks/registerFrontmatterHooks.ts
index 105e179..3fa4142 100644
--- a/src/utils/hooks/registerFrontmatterHooks.ts
+++ b/src/utils/hooks/registerFrontmatterHooks.ts
@@ -1,4 +1,4 @@
-import { HOOK_EVENTS, type HookEvent } from 'src/entrypoints/agentSdkTypes.js'
+import { HOOK_EVENTS, type HookEvent } from 'src/entrypoints/agentSdkTypes.ts'
 import type { AppState } from 'src/state/AppState.js'
 import { logForDebugging } from '../debug.js'
 import type { HooksSettings } from '../settings/types.js'
diff --git a/src/utils/hooks/registerSkillHooks.ts b/src/utils/hooks/registerSkillHooks.ts
index 8619d51..74dc0c6 100644
--- a/src/utils/hooks/registerSkillHooks.ts
+++ b/src/utils/hooks/registerSkillHooks.ts
@@ -1,4 +1,4 @@
-import { HOOK_EVENTS } from 'src/entrypoints/agentSdkTypes.js'
+import { HOOK_EVENTS } from 'src/entrypoints/agentSdkTypes.ts'
 import type { AppState } from 'src/state/AppState.js'
 import { logForDebugging } from '../debug.js'
 import type { HooksSettings } from '../settings/types.js'
diff --git a/src/utils/hooks/sessionHooks.ts b/src/utils/hooks/sessionHooks.ts
index ad0d1f9..18920f4 100644
--- a/src/utils/hooks/sessionHooks.ts
+++ b/src/utils/hooks/sessionHooks.ts
@@ -1,4 +1,4 @@
-import { HOOK_EVENTS, type HookEvent } from 'src/entrypoints/agentSdkTypes.js'
+import { HOOK_EVENTS, type HookEvent } from 'src/entrypoints/agentSdkTypes.ts'
 import type { AppState } from 'src/state/AppState.js'
 import type { Message } from 'src/types/message.js'
 import { logForDebugging } from '../debug.js'
diff --git a/src/utils/messages.ts b/src/utils/messages.ts
index a8d9316..3360046 100644
--- a/src/utils/messages.ts
+++ b/src/utils/messages.ts
@@ -102,7 +102,7 @@ import type {
 import type {
   HookEvent,
   SDKAssistantMessageError,
-} from 'src/entrypoints/agentSdkTypes.js'
+} from 'src/entrypoints/agentSdkTypes.ts'
 import { EXPLORE_AGENT } from 'src/tools/AgentTool/built-in/exploreAgent.js'
 import { PLAN_AGENT } from 'src/tools/AgentTool/built-in/planAgent.js'
 import { areExplorePlanAgentsEnabled } from 'src/tools/AgentTool/builtInAgents.js'
diff --git a/src/utils/messages/mappers.ts b/src/utils/messages/mappers.ts
index aaa3168..2728108 100644
--- a/src/utils/messages/mappers.ts
+++ b/src/utils/messages/mappers.ts
@@ -10,7 +10,7 @@ import type {
   SDKCompactBoundaryMessage,
   SDKMessage,
   SDKRateLimitInfo,
-} from 'src/entrypoints/agentSdkTypes.js'
+} from 'src/entrypoints/agentSdkTypes.ts'
 import type { ClaudeAILimits } from 'src/services/claudeAiLimits.js'
 import { EXIT_PLAN_MODE_V2_TOOL_NAME } from 'src/tools/ExitPlanModeTool/constants.js'
 import type {
diff --git a/src/utils/messages/systemInit.ts b/src/utils/messages/systemInit.ts
index 0530b87..6942d80 100644
--- a/src/utils/messages/systemInit.ts
+++ b/src/utils/messages/systemInit.ts
@@ -6,7 +6,7 @@ import type {
   ApiKeySource,
   PermissionMode,
   SDKMessage,
-} from 'src/entrypoints/agentSdkTypes.js'
+} from 'src/entrypoints/agentSdkTypes.ts'
 import {
   AGENT_TOOL_NAME,
   LEGACY_AGENT_TOOL_NAME,
diff --git a/src/utils/plugins/loadPluginHooks.ts b/src/utils/plugins/loadPluginHooks.ts
index 92eaa24..813e035 100644
--- a/src/utils/plugins/loadPluginHooks.ts
+++ b/src/utils/plugins/loadPluginHooks.ts
@@ -1,5 +1,5 @@
 import memoize from 'lodash-es/memoize.js'
-import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js'
+import type { HookEvent } from 'src/entrypoints/agentSdkTypes.ts'
 import {
   clearRegisteredPluginHooks,
   getRegisteredHooks,
diff --git a/src/utils/queryHelpers.ts b/src/utils/queryHelpers.ts
index a3661ba..aba2179 100644
--- a/src/utils/queryHelpers.ts
+++ b/src/utils/queryHelpers.ts
@@ -4,7 +4,7 @@ import {
   getSessionId,
   isSessionPersistenceDisabled,
 } from 'src/bootstrap/state.js'
-import type { SDKMessage } from 'src/entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from 'src/entrypoints/agentSdkTypes.ts'
 import type { CanUseToolFn } from '../hooks/useCanUseTool.js'
 import { runTools } from '../services/tools/toolOrchestration.js'
 import { findToolByName, type Tool, type Tools } from '../Tool.js'
diff --git a/src/utils/sessionFileAccessHooks.ts b/src/utils/sessionFileAccessHooks.ts
index 08d4ed5..7916539 100644
--- a/src/utils/sessionFileAccessHooks.ts
+++ b/src/utils/sessionFileAccessHooks.ts
@@ -5,7 +5,7 @@
  */
 import { feature } from 'bun:bundle'
 import { registerHookCallbacks } from '../bootstrap/state.js'
-import type { HookInput, HookJSONOutput } from '../entrypoints/agentSdkTypes.js'
+import type { HookInput, HookJSONOutput } from '../entrypoints/agentSdkTypes.ts'
 import {
   type AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
   logEvent,
diff --git a/src/utils/stats.ts b/src/utils/stats.ts
index 7b8434a..1c1c926 100644
--- a/src/utils/stats.ts
+++ b/src/utils/stats.ts
@@ -1,7 +1,7 @@
 import { feature } from 'bun:bundle'
 import { open } from 'fs/promises'
 import { basename, dirname, join, sep } from 'path'
-import type { ModelUsage } from 'src/entrypoints/agentSdkTypes.js'
+import type { ModelUsage } from 'src/entrypoints/agentSdkTypes.ts'
 import type { Entry, TranscriptMessage } from '../types/logs.js'
 import { logForDebugging } from './debug.js'
 import { errorMessage, isENOENT } from './errors.js'
diff --git a/src/utils/statsCache.ts b/src/utils/statsCache.ts
index 109268d..1d6316b 100644
--- a/src/utils/statsCache.ts
+++ b/src/utils/statsCache.ts
@@ -2,7 +2,7 @@ import { feature } from 'bun:bundle'
 import { randomBytes } from 'crypto'
 import { open } from 'fs/promises'
 import { join } from 'path'
-import type { ModelUsage } from '../entrypoints/agentSdkTypes.js'
+import type { ModelUsage } from '../entrypoints/agentSdkTypes.ts'
 import { logForDebugging } from './debug.js'
 import { getClaudeConfigHomeDir } from './envUtils.js'
 import { errorMessage } from './errors.js'
diff --git a/src/utils/streamlinedTransform.ts b/src/utils/streamlinedTransform.ts
index 3528d03..8272709 100644
--- a/src/utils/streamlinedTransform.ts
+++ b/src/utils/streamlinedTransform.ts
@@ -8,7 +8,7 @@
  * - Strips tool list and model info from init messages
  */
 
-import type { SDKAssistantMessage } from 'src/entrypoints/agentSdkTypes.js'
+import type { SDKAssistantMessage } from 'src/entrypoints/agentSdkTypes.ts'
 import type { StdoutMessage } from 'src/entrypoints/sdk/controlTypes.ts'
 import { FILE_EDIT_TOOL_NAME } from 'src/tools/FileEditTool/constants.js'
 import { FILE_READ_TOOL_NAME } from 'src/tools/FileReadTool/prompt.js'
diff --git a/src/utils/teleport.tsx b/src/utils/teleport.tsx
index 4be98a0..5d0bff5 100644
--- a/src/utils/teleport.tsx
+++ b/src/utils/teleport.tsx
@@ -9,7 +9,7 @@ import { isPolicyAllowed } from 'src/services/policyLimits/index.js';
 import { z } from 'zod/v4';
 import { getTeleportErrors, TeleportError, type TeleportLocalErrorType } from '../components/TeleportError.js';
 import { getOauthConfig } from '../constants/oauth.js';
-import type { SDKMessage } from '../entrypoints/agentSdkTypes.js';
+import type { SDKMessage } from '../entrypoints/agentSdkTypes.ts';
 import type { Root } from '../ink.js';
 import { KeybindingSetup } from '../keybindings/KeybindingProviderSetup.js';
 import { queryHaiku } from '../services/api/claude.js';
diff --git a/src/utils/ultraplan/ccrSession.ts b/src/utils/ultraplan/ccrSession.ts
index a72b594..2e6101e 100644
--- a/src/utils/ultraplan/ccrSession.ts
+++ b/src/utils/ultraplan/ccrSession.ts
@@ -8,7 +8,7 @@ import type {
   ToolResultBlockParam,
   ToolUseBlock,
 } from '@anthropic-ai/sdk/resources'
-import type { SDKMessage } from '../../entrypoints/agentSdkTypes.js'
+import type { SDKMessage } from '../../entrypoints/agentSdkTypes.ts'
 import { EXIT_PLAN_MODE_V2_TOOL_NAME } from '../../tools/ExitPlanModeTool/constants.js'
 import { logForDebugging } from '../debug.js'
 import { sleep } from '../sleep.js'