diff --git a/custom_components/nvidia_shield/__init__.py b/custom_components/nvidia_shield/__init__.py
index 469e84a..4bf8247 100644
--- a/custom_components/nvidia_shield/__init__.py
+++ b/custom_components/nvidia_shield/__init__.py
@@ -83,9 +83,12 @@ def _yaml_seed_blocks(domain_config) -> list[dict]:
         if not isinstance(block, dict):
             continue
         name = block.get("name") or DEFAULT_NAME
+        # t32 F4 (review rider): the seed honors the block's shape — a
+        # protocol-only block does NOT force ADB on; ADB comes only when the
+        # block carries an adb host (interactive cosmetics stay in the flow).
         seed = {
             "name": name,
-            CONF_ADB_ENABLED: True,
+            CONF_ADB_ENABLED: bool(block.get(CONF_ADB_HOST)),
             CONF_ADB_HOST: str(block.get(CONF_ADB_HOST) or ""),
             CONF_ADB_PORT: int(block.get(CONF_ADB_PORT) or DEFAULT_ADB_PORT),
             # protocol fields are prefill hints ONLY — pairing stays interactive
diff --git a/custom_components/nvidia_shield/config_flow.py b/custom_components/nvidia_shield/config_flow.py
index ea4c78b..f55a08d 100644
--- a/custom_components/nvidia_shield/config_flow.py
+++ b/custom_components/nvidia_shield/config_flow.py
@@ -519,10 +519,12 @@ class NvidiaShieldConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
         await self.async_set_unique_id(seed_unique_id)
         self._abort_if_unique_id_configured()
 
-        # route into the standard user flow (single interactive visit)
+        # route into the standard user flow (single interactive visit);
+        # t32 F4: the prefill honors the block shape — ADB only when the
+        # block actually carries an adb host.
         self._user_data = {
             "name": name,
-            CONF_ADB_ENABLED: True,
+            CONF_ADB_ENABLED: bool(block.get(CONF_ADB_HOST)),
             CONF_ADB_HOST: block.get(CONF_ADB_HOST, ""),
             CONF_ADB_PORT: block.get(CONF_ADB_PORT, DEFAULT_ADB_PORT),
             # protocol prefill hints ONLY (pairing stays interactive)
diff --git a/tests/test_standalone_setup.py b/tests/test_standalone_setup.py
index 1d70176..bb7c0c0 100644
--- a/tests/test_standalone_setup.py
+++ b/tests/test_standalone_setup.py
@@ -885,6 +885,54 @@ class TestMacLessDiscoveryF2:
         assert len(sys.modules[__name__]._zc_holder.entries) == 1
 
 
+class TestSeedBlockShapeF4:
+    """t32 F4 (rider): protocol-only seed blocks don't force ADB on."""
+
+    def test_protocol_only_block_keeps_adb_off(self):
+        import conftest
+        import entity_stublib
+
+        entity_stublib.install()
+        if "nsh.init" not in sys.modules:
+            conftest._load_module("nsh.init", conftest._SHIELD_DIR / "__init__.py")
+        init_module = sys.modules["nsh.init"]
+
+        blocks = init_module._yaml_seed_blocks(
+            {"name": "Proto", "protocol_host": "shield.local"}
+        )
+
+        assert blocks[0]["adb_enabled"] is False
+        assert blocks[0]["adb_host"] == ""
+
+    def test_adb_block_keeps_adb_on(self):
+        import conftest
+        import entity_stublib
+
+        entity_stublib.install()
+        if "nsh.init" not in sys.modules:
+            conftest._load_module("nsh.init", conftest._SHIELD_DIR / "__init__.py")
+        init_module = sys.modules["nsh.init"]
+
+        blocks = init_module._yaml_seed_blocks(
+            {"name": "Adb", "adb_host": "10.0.0.31"}
+        )
+
+        assert blocks[0]["adb_enabled"] is True
+
+    async def test_protocol_only_import_prefills_adb_off(self):
+        module = _form_module()
+        flow = module.NvidiaShieldConfigFlow()
+        flow.hass = FakeHass("/tmp/nsh-f4")
+        flow._async_current_entries = lambda: []
+
+        result = await flow.async_step_import(
+            {"name": "Proto", "protocol_host": "shield.local"}
+        )
+
+        assert result["type"] == "form"
+        assert flow._user_data["adb_enabled"] is False
+
+
 class TestZeroconfDiscovery:
     """P4-1a: _androidtvremote2._tcp discovery → pre-filled user step."""