diff --git a/server/src/__tests__/task-watchdogs-classifier.test.ts b/server/src/__tests__/task-watchdogs-classifier.test.ts
index 16ef800c088..71865c75dfe 100644
--- a/server/src/__tests__/task-watchdogs-classifier.test.ts
+++ b/server/src/__tests__/task-watchdogs-classifier.test.ts
@@ -1,8 +1,6 @@
-import { describe, expect, it, vi } from "vitest";
+import { describe, expect, it } from "vitest";
 import { classifyTaskWatchdogSubtree, type TaskWatchdogClassifierIssue } from "../services/task-watchdogs.ts";
 
-import { createIncompleteTaskWatchdogScanReporter } from "../services/task-watchdog-diagnostics.ts";
-
 const companyId = "company-1";
 const sourceId = "source-1";
 const childId = "child-1";
@@ -37,39 +35,6 @@ function classify(overrides: Partial<Parameters<typeof classifyTaskWatchdogSubtr
 }
 
 describe("task watchdog subtree classifier", () => {
-  it("reports an unchanged incomplete scan once across startup and a day of periodic ticks", () => {
-    const warn = vi.fn();
-    const report = createIncompleteTaskWatchdogScanReporter(warn);
-    report({ incomplete: 2, incompleteIssueIds: [sourceId, childId] }, "startup");
-    for (let tick = 0; tick < 2880; tick += 1) {
-      report({ incomplete: 2, incompleteIssueIds: [childId, sourceId] }, "periodic");
-    }
-    expect(warn).toHaveBeenCalledTimes(1);
-    expect(warn).toHaveBeenCalledWith(
-      { incomplete: 2, newIncompleteIssueIds: [sourceId, childId] },
-      "startup task-watchdog reconciliation found incomplete subtree scans",
-    );
-  });
-
-  it("reports new incomplete issues and reports a resolved issue if it becomes incomplete again", () => {
-    const warn = vi.fn();
-    const report = createIncompleteTaskWatchdogScanReporter(warn);
-    report({ incomplete: 1, incompleteIssueIds: [sourceId] }, "startup");
-    report({ incomplete: 2, incompleteIssueIds: [sourceId, childId] }, "periodic");
-    expect(warn).toHaveBeenLastCalledWith(
-      { incomplete: 2, newIncompleteIssueIds: [childId] },
-      "periodic task-watchdog reconciliation found incomplete subtree scans",
-    );
-    report({ incomplete: 0, incompleteIssueIds: [] }, "periodic");
-    expect(warn).toHaveBeenCalledTimes(2);
-    report({ incomplete: 1, incompleteIssueIds: [sourceId] }, "periodic");
-    expect(warn).toHaveBeenCalledTimes(3);
-    expect(warn).toHaveBeenLastCalledWith(
-      { incomplete: 1, newIncompleteIssueIds: [sourceId] },
-      "periodic task-watchdog reconciliation found incomplete subtree scans",
-    );
-  });
-
   it("does not produce a stopped fingerprint from an incomplete scan", () => {
     const result = classify({ subtreeIncomplete: true });
     expect(result.state).toBe("incomplete");
diff --git a/server/src/services/task-watchdog-diagnostics.ts b/server/src/services/task-watchdog-diagnostics.ts
deleted file mode 100644
index ea08eebe2b4..00000000000
--- a/server/src/services/task-watchdog-diagnostics.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-export function createIncompleteTaskWatchdogScanReporter(
-  warn: (details: { incomplete: number; newIncompleteIssueIds: string[] }, message: string) => void,
-) {
-  let previousIncompleteIssueIds = new Set<string>();
-  return (result: { incomplete: number; incompleteIssueIds: string[] }, phase: "startup" | "periodic") => {
-    const currentIssueIds = new Set(result.incompleteIssueIds);
-    const newIncompleteIssueIds = [...currentIssueIds].filter((id) => !previousIncompleteIssueIds.has(id));
-    previousIncompleteIssueIds = currentIssueIds;
-    if (newIncompleteIssueIds.length === 0) return;
-    warn(
-      { incomplete: result.incomplete, newIncompleteIssueIds },
-      `${phase} task-watchdog reconciliation found incomplete subtree scans`,
-    );
-  };
-}
-
diff --git a/tests/e2e/agent-chat-projects.spec.ts b/tests/e2e/agent-chat-projects.spec.ts
index 994df38746c..89ec94ca54c 100644
--- a/tests/e2e/agent-chat-projects.spec.ts
+++ b/tests/e2e/agent-chat-projects.spec.ts
@@ -459,12 +459,15 @@ test("plan approval hands the preserved revision to an assigned project task", a
         { timeout: 60_000 },
       )
       .toBe(1);
+    // Task completion is delivered back to the chat as another real turn.
+    await idle(request, f.chatPath, 3);
     const task = (
       await json(await request.get(`/api/companies/${f.company.id}/issues`))
     )[0];
     expect(task.parentId).toBeNull();
     expect(task.projectId).toBeTruthy();
     expect(task.assigneeAgentId).toBe(f.agent.id);
+    await expect(page.getByText(`Delegated work completed: ${task.identifier}`, { exact: true })).toBeVisible();
     const plan = await json(
       await request.get(`/api/issues/${task.id}/documents/plan`),
     );
diff --git a/tests/e2e/fixtures/agent-chat.mjs b/tests/e2e/fixtures/agent-chat.mjs
index 2a66bdd3111..d85ab355679 100644
--- a/tests/e2e/fixtures/agent-chat.mjs
+++ b/tests/e2e/fixtures/agent-chat.mjs
@@ -36,6 +36,10 @@ if (!task.conversationAgentId) {
   });
   process.exit(0);
 }
+if (ctx.wakeReason === "chat_task_completed") {
+  await comment(`Delegated work completed: ${ctx.chatCompletionUpdates.map((update) => update.identifier).join(", ")}`);
+  process.exit(0);
+}
 const comments = await api(`/issues/${task.id}/comments?order=asc`);
 const current =
   comments.find((c) => c.id === ctx.wakeCommentId) ??