fix: read-only baseline queries skip _runs upsert (register_run flag)

app/harness/log.py

@@ -52,6 +52,9 @@ class HarnessLog:
         run_id: 本次运行的唯一标识。
         git_sha: 代码版本，默认自动获取。
         config_snapshot: 本次运行的配置快照。
+        register_run: 是否注册运行（upsert _runs + 退出时同步 status）。默认 True；
+            只读查询已有 run（如基线预测回读）时传 False，避免把该 run 的
+            started_at/config/status 改写、把基线元数据污染成本次进程的运行状态。
     """
 
     def __init__(
@@ -60,27 +63,33 @@ class HarnessLog:
         run_id: str,
         git_sha: str | None = None,
         config_snapshot: dict[str, Any] | None = None,
+        *,
+        register_run: bool = True,
     ) -> None:
         self._run_id = run_id
+        self._register_run = register_run
         Path(db_path).parent.mkdir(parents=True, exist_ok=True)
         self._conn = sqlite3.connect(db_path, check_same_thread=False)
         self._lock = threading.Lock()
         self._conn.row_factory = sqlite3.Row
         self._conn.execute("PRAGMA journal_mode=WAL")
         self._init_fixed_tables()
-        resolved_sha = git_sha or _get_git_sha()
-        config_json = json.dumps(config_snapshot, ensure_ascii=False) if config_snapshot else None
-        self._conn.execute(
-            "INSERT INTO _runs"
-            " (run_id, git_sha, started_at, config, status)"
-            " VALUES (?, ?, ?, ?, ?)"
-            " ON CONFLICT(run_id) DO UPDATE SET"
-            " started_at=excluded.started_at,"
-            " config=excluded.config,"
-            " status=excluded.status",
-            (run_id, resolved_sha, _now_iso(), config_json, "running"),
-        )
-        self._conn.commit()
+        if register_run:
+            resolved_sha = git_sha or _get_git_sha()
+            config_json = (
+                json.dumps(config_snapshot, ensure_ascii=False) if config_snapshot else None
+            )
+            self._conn.execute(
+                "INSERT INTO _runs"
+                " (run_id, git_sha, started_at, config, status)"
+                " VALUES (?, ?, ?, ?, ?)"
+                " ON CONFLICT(run_id) DO UPDATE SET"
+                " started_at=excluded.started_at,"
+                " config=excluded.config,"
+                " status=excluded.status",
+                (run_id, resolved_sha, _now_iso(), config_json, "running"),
+            )
+            self._conn.commit()
 
     def _init_fixed_tables(self) -> None:
         """创建 _runs 和 _events 固定表。"""
@@ -217,13 +226,18 @@ class HarnessLog:
 
         参数:
             status: 最终状态，"completed" 或 "failed"。
+
+        关键实现:
+            register_run=False（只读打开）时跳过 status 更新，仅关闭连接，
+            避免只读回读把已有 run 的 finished_at/status 改写。
         """
         with self._lock:
-            self._conn.execute(
-                "UPDATE _runs SET finished_at = ?, status = ? WHERE run_id = ?",
-                (_now_iso(), status, self._run_id),
-            )
-            self._conn.commit()
+            if self._register_run:
+                self._conn.execute(
+                    "UPDATE _runs SET finished_at = ?, status = ? WHERE run_id = ?",
+                    (_now_iso(), status, self._run_id),
+                )
+                self._conn.commit()
             self._conn.close()
 
     def __enter__(self) -> HarnessLog: