diff --git a/apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts b/apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts
index 2c0d13aa0b32..17bf4ac5b2a3 100644
--- a/apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts
+++ b/apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts
@@ -3686,6 +3686,78 @@ describe("ClaudeAdapterV2 background wake turns", () => {
     ),
   );
 
+  it.effect("shows a hook-dropped Claude prompt once and skips info-level lines", () =>
+    Effect.gen(function* () {
+      const harness = yield* makeWakeHarness;
+      const now = yield* DateTime.now;
+      yield* harness.runtime.startTurn(
+        makeClaudeTestTurnInput({
+          threadId: harness.threadId,
+          providerThread: harness.providerThread,
+          now,
+          attemptId: RunAttemptId.make("claude-hook-dropped-prompt-attempt"),
+          text: "Deploy to production",
+          attachments: [],
+        }),
+      );
+      const notice = "Prompt dropped by a hook: Deploys are frozen until Monday.";
+      const uuid = "00000000-0000-4000-8000-000000000305";
+      yield* Queue.offer(
+        harness.sdkMessages,
+        claudeSdkFrame({
+          type: "system",
+          subtype: "informational",
+          content: "Started in the background: agent-1",
+          level: "info",
+          session_id: WAKE_NATIVE_SESSION,
+          uuid: "00000000-0000-4000-8000-000000000307",
+        }),
+      );
+      yield* Queue.offer(
+        harness.sdkMessages,
+        claudeSdkFrame({
+          type: "system",
+          subtype: "informational",
+          content: notice,
+          level: "warning",
+          prevent_continuation: true,
+          session_id: WAKE_NATIVE_SESSION,
+          uuid,
+        }),
+      );
+      yield* Queue.offer(
+        harness.sdkMessages,
+        makeResultFrame({
+          uuid: "00000000-0000-4000-8000-000000000306",
+          result: notice,
+          numTurns: 0,
+          terminalReason: null,
+        }),
+      );
+      yield* Queue.take(harness.terminalReceipts);
+      const notices = harness.events.flatMap((event) =>
+        event.type === "turn_item.updated" && event.turnItem.type === "system_notice"
+          ? [event.turnItem]
+          : [],
+      );
+      assert.lengthOf(notices, 1);
+      assert.equal(notices[0]?.message, notice);
+      assert.equal(notices[0]?.status, "completed");
+      assert.equal(notices[0]?.nativeItemRef?.nativeId, uuid);
+      assert.equal(harness.terminalEvents()[0]?.status, "completed");
+      assert.isFalse(
+        harness.events.some(
+          (event) => event.type === "message.updated" && event.message.role === "assistant",
+        ),
+      );
+    }).pipe(
+      Effect.scoped,
+      Effect.provide(
+        Layer.mergeAll(NodeServices.layer, IdAllocator.layer, McpProviderSessions.layer),
+      ),
+    ),
+  );
+
   it.effect(
     "runs native compaction and keeps its context watermark separate from billed usage",
     () =>
diff --git a/apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts b/apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts
index 0a289a522663..c856ee8835c6 100644
--- a/apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts
+++ b/apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts
@@ -2971,6 +2971,8 @@ interface ActiveClaudeTurnContext {
     fallbackText: string;
     fallbackNativeItemId: string;
     emittedNativeItemIds: Set<string>;
+    // The CLI repeats a notice that ends a prompt as the turn's result text.
+    noticeTexts: Set<string>;
   };
   readonly reasoning: {
     messageId: string | null;
@@ -6770,9 +6772,14 @@ export const makeClaudeAdapterV2 = Effect.fn("makeClaudeAdapterV2")(function* (
             return;
           }
 
-          if (message.type === "system" && message.subtype === "model_refusal_fallback") {
+          if (
+            message.type === "system" &&
+            (message.subtype === "model_refusal_fallback" ||
+              (message.subtype === "informational" && message.level !== "info"))
+          ) {
             const now = yield* DateTime.now;
             const nativeItemId = message.uuid;
+            context.assistant.noticeTexts.add(message.content);
             yield* emitProviderEvent({
               type: "turn_item.updated",
               driver: CLAUDE_PROVIDER,
@@ -7451,7 +7458,8 @@ export const makeClaudeAdapterV2 = Effect.fn("makeClaudeAdapterV2")(function* (
             context.assistant.emittedNativeItemIds.size === 0 &&
             context.assistant.fallbackText.length === 0 &&
             resultText !== null &&
-            resultText.text.length > 0
+            resultText.text.length > 0 &&
+            !context.assistant.noticeTexts.has(resultText.text)
           ) {
             context.assistant.fallbackText = resultText.text;
             context.assistant.fallbackNativeItemId = resultText.nativeItemId;
@@ -8309,6 +8317,7 @@ export const makeClaudeAdapterV2 = Effect.fn("makeClaudeAdapterV2")(function* (
                 fallbackText: "",
                 fallbackNativeItemId: `assistant:${turnInput.runId}`,
                 emittedNativeItemIds: new Set(),
+                noticeTexts: new Set(),
               },
               reasoning: {
                 messageId: null,