feat(hooks): wire task-reminder hook into session tier and event chain

The task-reminder hook was fully implemented with tests but never
registered in the hook composition system. This commit:
- Adds 'task-reminder' to HookNameSchema for disabled_hooks support
- Exports createTaskReminderHook from hooks barrel
- Registers in create-session-hooks.ts with isHookEnabled gate
- Wires tool.execute.after handler in tool-execute-after.ts
- Wires event handler in event.ts for session.deleted cleanup

Author: Hungdoan565

src/config/schema/hooks.ts

@@ -59,6 +59,7 @@ export const HookNameSchema = z.enum([
   "fsync-skip-warning",
   "plan-format-validator",
   "legacy-plugin-toast",
+  "task-reminder",
 ])
 
 export type HookName = z.infer<typeof HookNameSchema>

src/hooks/index.ts

@@ -68,3 +68,4 @@ export { createLegacyPluginToastHook } from "./legacy-plugin-toast"
 export { createFsyncSkipWarningHook } from "./fsync-skip-warning"
 export { createNotepadWriteGuardHook } from "./notepad-write-guard"
 export { createPlanFormatValidatorHook } from "./plan-format-validator"
+export { createTaskReminderHook } from "./task-reminder"

src/plugin/event.ts

@@ -332,6 +332,7 @@ export function createEventHandler(args: {
     await runEventHookSafely("writeExistingFileGuard", hooks.writeExistingFileGuard?.event, input);
     await runEventHookSafely("atlasHook", hooks.atlasHook?.handler, input);
     await runEventHookSafely("autoSlashCommand", hooks.autoSlashCommand?.event, input);
+    await runEventHookSafely("taskReminder", hooks.taskReminder?.event, input);
   };
 
   const recentSyntheticIdles = new Map<string, number>();

src/plugin/hooks/create-session-hooks.ts

@@ -28,6 +28,7 @@ import {
   createPreemptiveCompactionHook,
   createRuntimeFallbackHook,
   createLegacyPluginToastHook,
+  createTaskReminderHook,
 } from "../../hooks"
 import { createAnthropicEffortHook } from "../../hooks/anthropic-effort"
 import {
@@ -65,6 +66,7 @@ export type SessionHooks = {
   anthropicEffort: ReturnType<typeof createAnthropicEffortHook> | null
   runtimeFallback: ReturnType<typeof createRuntimeFallbackHook> | null
   legacyPluginToast: ReturnType<typeof createLegacyPluginToastHook> | null
+  taskReminder: ReturnType<typeof createTaskReminderHook> | null
 }
 
 export function createSessionHooks(args: {
@@ -276,6 +278,10 @@ export function createSessionHooks(args: {
     ? safeHook("legacy-plugin-toast", () => createLegacyPluginToastHook(ctx))
     : null
 
+  const taskReminder = isHookEnabled("task-reminder")
+    ? safeHook("task-reminder", () => createTaskReminderHook(ctx))
+    : null
+
   return {
     contextWindowMonitor,
     preemptiveCompaction,
@@ -301,5 +307,6 @@ export function createSessionHooks(args: {
     anthropicEffort,
     runtimeFallback,
     legacyPluginToast,
+    taskReminder,
   }
 }

src/plugin/tool-execute-after.ts

@@ -181,6 +181,7 @@ export function createToolExecuteAfterHandler(args: {
       await hooks.fsyncSkipWarning?.["tool.execute.after"]?.(hookInput, output)
       await hooks.jsonErrorRecovery?.["tool.execute.after"]?.(hookInput, output)
       await hooks.planFormatValidator?.["tool.execute.after"]?.(hookInput, output)
+      await hooks.taskReminder?.["tool.execute.after"]?.(hookInput, output)
     }
 
     if (input.tool === "extract" || input.tool === "discard") {