fix(heartbeat): display the exact guard command once in Markdown

docs/heartbeat-automation-prompt.md

@@ -73,6 +73,14 @@ static refresh/spend sequence: after validated work it follows the current
 compatibility, not as a stale fallback. Todo acceptance alone is not Turn
 settlement or terminal vision closure. The brief base budget is 4,800 characters; reward-memory headroom remains separate.
 
+Markdown prints a complete guard command once when the successful task body
+already contains that exact command as a whole line. Generator Inputs then
+points to the body; JSON fields remain complete. Missing, different, partial or
+failed bodies retain the complete diagnostic command.
+
+成功正文已按完整行包含同一 guard 命令时，Markdown 诊断区指向正文，避免重复长命令；
+JSON 字段保留全文。正文缺失、不同、仅匹配前缀或生成失败时，诊断区仍打印完整命令。
+
 Brief 与 thin 共用完整执行义务路径；full、compact、brief 均移除固定结算配方，而不是
 删除结算义务。真实 App preflight、registry scope、完整 guard 和静态安全规则
 均保留；结算顺序与身份以本轮动态 contract 为准，vision replan 不由历史成功清账。

loopx/control_plane/heartbeat/task_body.py

@@ -781,9 +781,22 @@ def render_heartbeat_generator_inputs_markdown(payload: dict[str, Any]) -> str:
             "- pr_review_pre_quota_command: "
             f"`{payload['pr_review_pre_quota_command']}`"
         )
+    guard_command = payload.get("quota_guard_command")
+    task_body = payload.get("task_body")
+    # The copyable body already owns this exact command. Keep one complete
+    # spelling in Markdown; failed/partial bodies still need the diagnostic.
+    guard_in_body = (
+        payload.get("ok") is not False
+        and isinstance(guard_command, str)
+        and bool(guard_command.strip())
+        and isinstance(task_body, str)
+        and guard_command in task_body.splitlines()
+    )
     lines.extend(
         [
-            f"- quota_guard_command: `{payload.get('quota_guard_command')}`",
+            "- quota_guard_command: shown verbatim in task body"
+            if guard_in_body
+            else f"- quota_guard_command: `{guard_command}`",
             f"- quota_spend_command: `{payload.get('quota_spend_command')}`",
             f"- cli_preflight: `{payload.get('cli_preflight')}`",
             "- interface_budget: "

tests/control_plane/test_heartbeat_prompt_support.py

@@ -272,6 +272,27 @@ def test_thin_markdown_diagnostics_only_show_the_selected_prompt_command() -> No
     assert "- expanded_prompt_command:" not in rendered
     assert "- compact_prompt_command:" not in rendered
     assert "- brief_prompt_command:" not in rendered
+    assert payload["quota_guard_command"] in payload["task_body"].splitlines()
+    assert rendered.count(payload["quota_guard_command"]) == 1
+    assert "- quota_guard_command: shown verbatim in task body" in rendered
+
+
+@pytest.mark.parametrize("body_kind", ["missing", "prefix", "different", "error"])
+def test_markdown_keeps_guard_diagnostic_without_a_successful_exact_body_command(body_kind) -> None:
+    command = "loopx quota should-run --goal-id fixture"
+    body = {
+        "missing": "",
+        "prefix": command + " --todo-id another-todo",
+        "different": "loopx quota should-run --goal-id another-goal",
+        "error": command,
+    }[body_kind]
+    rendered = render_heartbeat_generator_inputs_markdown({
+        "ok": body_kind != "error",
+        "task_body": body,
+        "quota_guard_command": command,
+    })
+    assert f"- quota_guard_command: `{command}`" in rendered
+    assert "shown verbatim in task body" not in rendered
 
 
 @pytest.mark.parametrize("resolved", ["same", "different", None])
@@ -306,8 +327,10 @@ def test_markdown_diagnostics_keep_available_prequota_commands(review_enabled) -
     )
     rendered = render_heartbeat_prompt_markdown(payload)
     assert payload["task_body"] in rendered
-    for key in ("thin_prompt_command", "quota_guard_command", "quota_spend_command"):
+    for key in ("thin_prompt_command", "quota_spend_command"):
         assert f"- {key}: `{payload[key]}`" in rendered
+    assert payload["quota_guard_command"] in payload["task_body"].splitlines()
+    assert rendered.count(payload["quota_guard_command"]) == 1
     if review_enabled:
         assert "heartbeat-prequota" in payload["pr_review_pre_quota_command"]
         assert f"- pr_review_pre_quota_command: `{payload['pr_review_pre_quota_command']}`" in rendered