diff --git a/src/cursor_flasher/detector.py b/src/cursor_flasher/detector.py
index 6ff89cb..3d87678 100644
--- a/src/cursor_flasher/detector.py
+++ b/src/cursor_flasher/detector.py
@@ -30,7 +30,7 @@ CURSOR_BUNDLE_ID = "com.todesktop.230313mzl4w4u92"
 AGENT_WORKING_EXACT = {"Stop", "Cancel generating"}
 AGENT_WORKING_PATTERNS = [re.compile(r"^Generating\b", re.IGNORECASE)]
 
-APPROVAL_EXACT = {"Accept", "Reject", "Accept All", "Deny", "Resume", "Continue"}
+APPROVAL_EXACT = {"Accept", "Reject", "Accept All", "Deny"}
 APPROVAL_PATTERNS = [
     re.compile(r"^Run\b", re.IGNORECASE),
     re.compile(r"^Allow\b", re.IGNORECASE),
diff --git a/src/cursor_flasher/state.py b/src/cursor_flasher/state.py
index b93438e..bb351b1 100644
--- a/src/cursor_flasher/state.py
+++ b/src/cursor_flasher/state.py
@@ -15,20 +15,25 @@ class StateMachine:
         self._last_dismiss_time: float = 0
 
     def update(self, *, agent_working: bool, approval_needed: bool) -> bool:
-        """Update state based on detected signals. Returns True if state changed."""
-        old = self.state
+        """Update state based on detected signals. Returns True if state changed.
 
-        if approval_needed and self.state != FlasherState.WAITING_FOR_USER:
-            if not self._in_cooldown():
-                self.state = FlasherState.WAITING_FOR_USER
-            return self.state != old
+        Only transitions to WAITING_FOR_USER after seeing AGENT_WORKING first.
+        This prevents stale approval buttons in chat history from triggering
+        false positives.
+        """
+        old = self.state
 
         match self.state:
             case FlasherState.IDLE:
                 if agent_working:
                     self.state = FlasherState.AGENT_WORKING
             case FlasherState.AGENT_WORKING:
-                if not agent_working:
+                if approval_needed and not agent_working:
+                    if not self._in_cooldown():
+                        self.state = FlasherState.WAITING_FOR_USER
+                    else:
+                        self.state = FlasherState.IDLE
+                elif not agent_working:
                     if not self._in_cooldown():
                         self.state = FlasherState.WAITING_FOR_USER
                     else:
diff --git a/tests/test_state.py b/tests/test_state.py
index f973f44..3d38ede 100644
--- a/tests/test_state.py
+++ b/tests/test_state.py
@@ -66,10 +66,17 @@ class TestStateMachine:
         changed = sm.update(agent_working=False, approval_needed=False)
         assert sm.cooldown == 5.0
 
-    def test_direct_approval_from_idle(self):
-        """If we detect approval buttons without seeing agent_working first,
-        still transition to WAITING_FOR_USER."""
+    def test_stale_approval_from_idle_ignored(self):
+        """Approval buttons in IDLE state (stale chat history) must not trigger flash."""
         sm = StateMachine()
         changed = sm.update(agent_working=False, approval_needed=True)
+        assert sm.state == FlasherState.IDLE
+        assert changed is False
+
+    def test_approval_after_working_triggers(self):
+        """Approval buttons after seeing agent work should trigger flash."""
+        sm = StateMachine()
+        sm.update(agent_working=True, approval_needed=False)
+        changed = sm.update(agent_working=False, approval_needed=True)
         assert sm.state == FlasherState.WAITING_FOR_USER
         assert changed is True