diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3a92da..52535b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Fixed
+
+- Claude Code turn notifications no longer arrive while a background subagent or workflow is still running.
+
 ## 0.1.4
 
 ### Fixed
diff --git a/README.md b/README.md
index 8a57b20..6518568 100644
--- a/README.md
+++ b/README.md
@@ -107,6 +107,8 @@ Completion notifications are configured by default:
 | Claude Code | `Stop`        | Final response, when available. |
 | Claude Code | `StopFailure` | Turn stopped with an error.     |
 
+For Claude Code, Busy Octopus skips the `Stop` notification while a background subagent or workflow is still running, because its result starts another turn.
+
 The `--enable-attention` setup option adds:
 
 | Provider    | Event                                                               | Message            |
diff --git a/docs/TROUBLESHOOTING.md b/docs/TROUBLESHOOTING.md
index 27e3b61..c622bc1 100644
--- a/docs/TROUBLESHOOTING.md
+++ b/docs/TROUBLESHOOTING.md
@@ -26,6 +26,8 @@ Do not share prompts, agent output, hook payloads, queue files, credentials, or
 - Find the hook error output in the agent transcript or hook log.
 - A line that starts with `busy-octopus: unable to process the agent hook:` names the failure type and the hook fields that failed validation.
 - This line contains no hook content. You can include it in a bug report.
+- In Claude Code, a turn that ends while a background subagent or workflow is still running sends no notification. The turn that starts after the last of them finishes sends it.
+- A background subagent waiting for a permission prompt sends no notification until it continues. Run setup with `--enable-attention` to be notified of approval requests.
 
 ## VS Code does not consume notifications
 
diff --git a/src/integration/agent/claude-code/adapter.spec.test.ts b/src/integration/agent/claude-code/adapter.spec.test.ts
index 4ec59f0..f454664 100644
--- a/src/integration/agent/claude-code/adapter.spec.test.ts
+++ b/src/integration/agent/claude-code/adapter.spec.test.ts
@@ -40,6 +40,71 @@ describe("claudeCodeHookAdapter", () => {
     } satisfies Partial<NotifyInput>);
   });
 
+  it.each(["subagent", "workflow"])(
+    "skips a turn that waits for a %s task",
+    (type) => {
+      expect(
+        claudeCodeHookAdapter.createNotification({
+          ...stopHook,
+          background_tasks: [
+            {
+              id: "task-1",
+              type,
+              status: "running",
+              description: "Synthetic task.",
+            },
+          ],
+        }),
+      ).toBeNull();
+    },
+  );
+
+  it("skips a turn that waits for an agent task among other tasks", () => {
+    expect(
+      claudeCodeHookAdapter.createNotification({
+        ...stopHook,
+        background_tasks: [
+          {
+            id: "task-1",
+            type: "shell",
+            status: "running",
+            description: "Synthetic task.",
+          },
+          {
+            id: "task-2",
+            type: "subagent",
+            status: "pending",
+            description: "Synthetic task.",
+          },
+        ],
+      }),
+    ).toBeNull();
+  });
+
+  it("converts a turn while only open-ended background tasks run", () => {
+    expect(
+      claudeCodeHookAdapter.createNotification({
+        ...stopHook,
+        background_tasks: ["shell", "monitor", "teammate", "cloud session"].map(
+          (type, index) => ({
+            id: `task-${index}`,
+            type,
+            status: "running",
+            description: "Synthetic task.",
+          }),
+        ),
+      }),
+    ).toEqual(claudeCodeHookAdapter.createNotification(stopHook));
+  });
+
+  it("converts a turn without a background task registry", () => {
+    const { background_tasks: _, ...hook } = stopHook;
+
+    expect(claudeCodeHookAdapter.createNotification(hook)).toEqual(
+      claudeCodeHookAdapter.createNotification(stopHook),
+    );
+  });
+
   it("converts a failed turn without exposing error details", () => {
     expect(
       claudeCodeHookAdapter.createNotification({
diff --git a/src/integration/agent/claude-code/adapter.ts b/src/integration/agent/claude-code/adapter.ts
index 88d3aee..5328e04 100644
--- a/src/integration/agent/claude-code/adapter.ts
+++ b/src/integration/agent/claude-code/adapter.ts
@@ -20,12 +20,16 @@ const commonShape = {
   agent_type: z.string().min(1).max(256).optional(),
 } satisfies z.ZodRawShape;
 
+const ClaudeBackgroundTask = z.object({
+  type: z.string().max(256),
+});
+
 const ClaudeStopHook = z.object({
   ...commonShape,
   hook_event_name: z.literal("Stop"),
   stop_hook_active: z.boolean(),
   last_assistant_message: z.string().max(65_536).optional(),
-  background_tasks: z.array(z.unknown()).max(1_024).optional(),
+  background_tasks: z.array(ClaudeBackgroundTask).max(1_024).optional(),
   session_crons: z.array(z.unknown()).max(1_024).optional(),
 });
 
@@ -80,11 +84,22 @@ const notificationId = ({
     .digest("hex")
     .slice(0, 32)}`;
 
-const createNotification = (input: unknown): NotifyInput => {
+// Subagents and workflows report back in a later turn; other tasks, like idle teammates, may never end.
+const agentTaskTypeSet = new Set(["subagent", "workflow"]);
+
+const createNotification = (input: unknown): NotifyInput | null => {
   const hook = ClaudeCodeHook.parse(input);
 
   switch (hook.hook_event_name) {
     case "Stop":
+      if (
+        (hook.background_tasks ?? []).some(({ type }) =>
+          agentTaskTypeSet.has(type),
+        )
+      ) {
+        return null;
+      }
+
       return {
         body: agentNotificationBody(hook.last_assistant_message ?? null),
         directory: hook.cwd,