Auto-clear completed todo trees

tests/tools.test.ts

@@ -7,15 +7,17 @@ import { registerTaskTools } from "../src/tools.ts";
 function registeredTools(state = new TaskState()) {
   const tools = new Map<string, any>();
   let changes = 0;
+  const autoClearRestarts: boolean[] = [];
   const pi = {
     registerTool(tool: any) {
       tools.set(tool.name, tool);
     },
   };
-  registerTaskTools(pi as never, state, () => {
+  registerTaskTools(pi as never, state, (_ctx, restartAutoClear = false) => {
     changes += 1;
+    autoClearRestarts.push(restartAutoClear);
   });
-  return { tools, state, changes: () => changes };
+  return { tools, state, changes: () => changes, autoClearRestarts };
 }
 
 async function execute(tool: any, params: unknown) {
@@ -209,6 +211,7 @@ test("set_tasks appends optional-description tasks and persists a complete snaps
   assert.equal(result.details.snapshot.tasks[0].description, undefined);
   assert.equal(result.details.snapshot.nextId, 3);
   assert.equal(harness.changes(), 1);
+  assert.deepEqual(harness.autoClearRestarts, [false]);
 });
 
 test("set_tasks atomically replaces or clears the tree and resets IDs", async () => {
@@ -232,6 +235,7 @@ test("set_tasks atomically replaces or clears the tree and resets IDs", async ()
   });
   assert.equal(cleared.content[0].text, "Cleared task tree. Task IDs reset to 1.");
   assert.deepEqual(harness.state.snapshot(), { tasks: [], nextId: 1 });
+  assert.deepEqual(harness.autoClearRestarts, [false, true, true]);
 });
 
 test("tool validation errors preserve atomic state", async () => {