Auto-clear completed todo trees

index.ts

@@ -1,31 +1,57 @@
 import type { ExtensionAPI, ExtensionContext } from "@earendil-works/pi-coding-agent";
+import { createCompletedTaskAutoClear } from "./src/auto-clear.ts";
 import { clearCurrentTask, reportCurrentTask } from "./src/herdr.ts";
 import {
   COMPACTION_REMINDER,
   COMPACTION_REMINDER_TYPE,
   hasUnfinishedTasks,
 } from "./src/prompt.ts";
-import { TaskState } from "./src/state.ts";
+import { TASK_STATE_ENTRY_TYPE, TaskState } from "./src/state.ts";
 import { registerTaskTools } from "./src/tools.ts";
 import { clearTaskWidget, updateTaskWidget } from "./src/widget.ts";
 
 export default function piTodoHerdr(pi: ExtensionAPI): void {
   const state = new TaskState();
   let widgetVisible = true;
+  let activeContext: ExtensionContext | undefined;
 
-  const refresh = (ctx: ExtensionContext) => {
+  const autoClear = createCompletedTaskAutoClear(state, () => {
+    try {
+      pi.appendEntry(TASK_STATE_ENTRY_TYPE, { tasks: [], nextId: 1 });
+    } catch (error) {
+      console.error("[pi-todo-herdr] failed to persist automatic task clear; retrying:", error);
+      return false;
+    }
+
+    state.set("replace", [], false);
+    if (activeContext !== undefined) {
+      try {
+        updateTaskWidget(state, activeContext, widgetVisible);
+        void reportCurrentTask(state.list());
+      } catch (error) {
+        console.error("[pi-todo-herdr] failed to refresh task UI after automatic clear:", error);
+      }
+    }
+    return true;
+  });
+
+  const refresh = (ctx: ExtensionContext, restartAutoClear = false) => {
+    activeContext = ctx;
     updateTaskWidget(state, ctx, widgetVisible);
     void reportCurrentTask(state.list());
+    autoClear.sync(restartAutoClear);
   };
 
   const restore = (ctx: ExtensionContext) => {
     state.loadFromSession(ctx);
-    refresh(ctx);
+    refresh(ctx, true);
   };
 
   pi.on("session_start", async (_event, ctx) => restore(ctx));
   pi.on("session_tree", async (_event, ctx) => restore(ctx));
   pi.on("session_shutdown", async (event) => {
+    autoClear.cancel();
+    activeContext = undefined;
     if (event.reason === "quit") await clearCurrentTask();
   });
   pi.on("session_compact", () => {