diff --git a/apps/api/tests/test_host188_openclaw_callback_forwarder_ansible_catalog.py b/apps/api/tests/test_host188_openclaw_callback_forwarder_ansible_catalog.py
index 1e6df0f04..8aac8605b 100644
--- a/apps/api/tests/test_host188_openclaw_callback_forwarder_ansible_catalog.py
+++ b/apps/api/tests/test_host188_openclaw_callback_forwarder_ansible_catalog.py
@@ -213,6 +213,29 @@ def test_openclaw_playbook_is_check_first_bounded_and_rollback_capable() -> None
     assert tasks["Fail closed when systemd source identity is outside host188 scope"][
         "ansible.builtin.assert"
     ]["that"] == ["openclaw_workdir in allowed_working_directories"]
+    systemd_fields = tasks[
+        "Pin bounded systemd start and stop contracts separately"
+    ]["ansible.builtin.set_fact"]
+    assert "^ExecStart=" in systemd_fields["clawbot_exec_start_line"]
+    assert "^ExecStop=" in systemd_fields["clawbot_exec_stop_line"]
+    systemd_contract = tasks[
+        "Require the existing systemd-owned Compose up contract"
+    ]["ansible.builtin.assert"]["that"]
+    assert (
+        "'argv[]=/usr/bin/docker compose up -d ;' in clawbot_exec_start_line"
+        in systemd_contract
+    )
+    assert (
+        "'argv[]=/usr/bin/docker compose down ;' in clawbot_exec_stop_line"
+        in systemd_contract
+    )
+    assert (
+        "' down ' not in (' ' ~ clawbot_exec_start_line ~ ' ')"
+        in systemd_contract
+    )
+    assert "' down ' not in (' ' ~ clawbot_systemd_shape.stdout ~ ' ')" not in (
+        systemd_contract
+    )
 
     check_receipt = tasks["Publish check-mode overlay diff and no-write receipt"]
     assert check_receipt["when"] == "ansible_check_mode"
diff --git a/infra/ansible/playbooks/188-openclaw-callback-forwarder.yml b/infra/ansible/playbooks/188-openclaw-callback-forwarder.yml
index 7dc02bb42..31ffb24e0 100644
--- a/infra/ansible/playbooks/188-openclaw-callback-forwarder.yml
+++ b/infra/ansible/playbooks/188-openclaw-callback-forwarder.yml
@@ -143,16 +143,31 @@
       changed_when: false
       no_log: true
 
+    - name: Pin bounded systemd start and stop contracts separately
+      ansible.builtin.set_fact:
+        clawbot_exec_start_line: >-
+          {{ (clawbot_systemd_shape.stdout_lines
+              | select('match', '^ExecStart=') | list | first) | default('') }}
+        clawbot_exec_stop_line: >-
+          {{ (clawbot_systemd_shape.stdout_lines
+              | select('match', '^ExecStop=') | list | first) | default('') }}
+      changed_when: false
+
     - name: Require the existing systemd-owned Compose up contract
       ansible.builtin.assert:
         that:
           - "'Type=oneshot' in clawbot_systemd_shape.stdout"
-          - "'docker compose up -d' in clawbot_systemd_shape.stdout"
-          - "'--file' not in clawbot_systemd_shape.stdout"
-          - "' -f ' not in (' ' ~ clawbot_systemd_shape.stdout ~ ' ')"
-          - "'--build' not in clawbot_systemd_shape.stdout"
-          - "' pull ' not in (' ' ~ clawbot_systemd_shape.stdout ~ ' ')"
-          - "' down ' not in (' ' ~ clawbot_systemd_shape.stdout ~ ' ')"
+          - "'argv[]=/usr/bin/docker compose up -d ;' in clawbot_exec_start_line"
+          - "'argv[]=/usr/bin/docker compose down ;' in clawbot_exec_stop_line"
+          - "'--file' not in clawbot_exec_start_line"
+          - "'--file' not in clawbot_exec_stop_line"
+          - "' -f ' not in (' ' ~ clawbot_exec_start_line ~ ' ')"
+          - "' -f ' not in (' ' ~ clawbot_exec_stop_line ~ ' ')"
+          - "'--build' not in clawbot_exec_start_line"
+          - "'--build' not in clawbot_exec_stop_line"
+          - "' pull ' not in (' ' ~ clawbot_exec_start_line ~ ' ')"
+          - "' pull ' not in (' ' ~ clawbot_exec_stop_line ~ ' ')"
+          - "' down ' not in (' ' ~ clawbot_exec_start_line ~ ' ')"
           - "' prune ' not in (' ' ~ clawbot_systemd_shape.stdout ~ ' ')"
           - "' rm ' not in (' ' ~ clawbot_systemd_shape.stdout ~ ' ')"
         fail_msg: clawbot_systemd_command_contract_mismatch