diff --git a/apps/worker/src/mcp/roomote-mcp-server/chat-reply-satisfaction.ts b/apps/worker/src/mcp/roomote-mcp-server/chat-reply-satisfaction.ts
index 9ffc4e827..95c4528f5 100644
--- a/apps/worker/src/mcp/roomote-mcp-server/chat-reply-satisfaction.ts
+++ b/apps/worker/src/mcp/roomote-mcp-server/chat-reply-satisfaction.ts
@@ -20,6 +20,8 @@ export type ChatReplyPurpose =
 
 interface ChatReplySatisfactionState {
   startedAtMs?: number;
+  /** Blocks opening acknowledgements and progress from automation-started tasks. */
+  suppressNonTerminalRepliesWithoutTurn?: boolean;
   /**
    * Set at launch for late-bound automation execution tasks: the Stop hook
    * blocks silent completion, and the silence hook stamps post-closeout work
diff --git a/apps/worker/src/run-task/__tests__/run-task.test.ts b/apps/worker/src/run-task/__tests__/run-task.test.ts
index 04193b12b..b6a58529c 100644
--- a/apps/worker/src/run-task/__tests__/run-task.test.ts
+++ b/apps/worker/src/run-task/__tests__/run-task.test.ts
@@ -1245,6 +1245,7 @@ describe('runTask', () => {
       JSON.stringify({
         startedAtMs: 345_678,
         currentTurnRequiresInitialAck: false,
+        suppressNonTerminalRepliesWithoutTurn: true,
       }),
       'utf8',
     );
@@ -1309,6 +1310,7 @@ describe('runTask', () => {
       JSON.stringify({
         startedAtMs: 456_000,
         currentTurnRequiresInitialAck: false,
+        suppressNonTerminalRepliesWithoutTurn: true,
       }),
       'utf8',
     );
@@ -1367,6 +1369,7 @@ describe('runTask', () => {
       JSON.stringify({
         startedAtMs: 456_789,
         currentTurnRequiresInitialAck: false,
+        suppressNonTerminalRepliesWithoutTurn: true,
       }),
       'utf8',
     );
@@ -1425,6 +1428,7 @@ describe('runTask', () => {
       JSON.stringify({
         startedAtMs: 567_891,
         currentTurnRequiresInitialAck: false,
+        suppressNonTerminalRepliesWithoutTurn: true,
       }),
       'utf8',
     );
diff --git a/apps/worker/src/run-task/__tests__/slack-silence-hook-script.test.ts b/apps/worker/src/run-task/__tests__/slack-silence-hook-script.test.ts
index c3773b729..28804f8e9 100644
--- a/apps/worker/src/run-task/__tests__/slack-silence-hook-script.test.ts
+++ b/apps/worker/src/run-task/__tests__/slack-silence-hook-script.test.ts
@@ -358,7 +358,7 @@ describe('SLACK_SILENCE_HOOK_SCRIPT', () => {
       const stateFilePath = writeState({
         startedAtMs: Date.now(),
         currentTurnRequiresInitialAck: false,
-        requiresTerminalCloseoutWithoutTurn: true,
+        suppressNonTerminalRepliesWithoutTurn: true,
       });
 
       const result = runHook({
@@ -384,7 +384,7 @@ describe('SLACK_SILENCE_HOOK_SCRIPT', () => {
     const stateFilePath = writeState({
       startedAtMs: Date.now(),
       currentTurnRequiresInitialAck: false,
-      requiresTerminalCloseoutWithoutTurn: true,
+      suppressNonTerminalRepliesWithoutTurn: true,
     });
 
     const result = runHook({
@@ -406,7 +406,7 @@ describe('SLACK_SILENCE_HOOK_SCRIPT', () => {
     const stateFilePath = writeState({
       startedAtMs: Date.now(),
       currentTurnRequiresInitialAck: false,
-      requiresTerminalCloseoutWithoutTurn: true,
+      suppressNonTerminalRepliesWithoutTurn: true,
     });
 
     const result = runHook({
@@ -424,6 +424,34 @@ describe('SLACK_SILENCE_HOOK_SCRIPT', () => {
     expect(result.stdout).toBe('');
   });
 
+  it.each([
+    'roomote_post_to_channel',
+    'roomote_reply_to_slack_thread',
+    'roomote_send_chat_reaction_emoji',
+  ])('rejects %s from late-bound automation tasks', (toolName) => {
+    const stateFilePath = writeState({
+      startedAtMs: Date.now(),
+      currentTurnRequiresInitialAck: false,
+      suppressNonTerminalRepliesWithoutTurn: true,
+    });
+
+    const result = runHook({
+      input: {
+        hook_event_name: 'PreToolUse',
+        tool_name: toolName,
+      },
+      env: {
+        ROOMOTE_SLACK_REPLY_SATISFACTION_STATE_FILE: stateFilePath,
+      },
+    });
+
+    expect(result.status).toBe(0);
+    expect(JSON.parse(result.stdout)).toMatchObject({
+      decision: 'block',
+      permissionDecision: 'deny',
+    });
+  });
+
   it('allows tool_search before the current Slack turn has been acknowledged', () => {
     const stateFilePath = writeState({
       currentTurnMessageTs: 'user-111.222',
diff --git a/apps/worker/src/run-task/run-task.ts b/apps/worker/src/run-task/run-task.ts
index 6bb3cb871..1ebb598a6 100644
--- a/apps/worker/src/run-task/run-task.ts
+++ b/apps/worker/src/run-task/run-task.ts
@@ -1037,6 +1037,9 @@ export const runTask = async ({
           startedAtMs,
           currentTurnRequiresInitialAck:
             shouldRequireInitialAckOnInitialTurn(taskRun),
+          ...(isSilentChannelAutomationLaunch(taskRun)
+            ? { suppressNonTerminalRepliesWithoutTurn: true }
+            : {}),
           ...(initialTurnMessageTs
             ? {
                 currentTurnMessageTs: initialTurnMessageTs,
diff --git a/apps/worker/src/run-task/slack-silence-hook-script.ts b/apps/worker/src/run-task/slack-silence-hook-script.ts
index ffb753378..4c923d91c 100644
--- a/apps/worker/src/run-task/slack-silence-hook-script.ts
+++ b/apps/worker/src/run-task/slack-silence-hook-script.ts
@@ -240,7 +240,7 @@ function getSendChatReplyPurpose(input) {
 
 function isPrematureAutomationReply(input, state) {
   if (
-    state?.requiresTerminalCloseoutWithoutTurn !== true ||
+    state?.suppressNonTerminalRepliesWithoutTurn !== true ||
     trimString(state.currentTurnMessageTs)
   ) {
     return false;