diff --git a/cloud/db.py b/cloud/db.py
index 6fe3846..fc6918b 100644
--- a/cloud/db.py
+++ b/cloud/db.py
@@ -324,7 +324,9 @@ def _load_postgres_driver():
 #   （语义弱于 REPLACE，调用点只有 project_members 与
 #   slack_users 两张已知主键表，不会走到退化分支）。
 # - ``INSERT OR IGNORE`` -> ``ON CONFLICT DO NOTHING``：无冲突
-#   目标，任何唯一冲突都跳过，不改已有行。
+#   目标，任何唯一冲突都跳过，不改已有行；VALUES 形与
+#   SELECT 形两种写法都翻译（SELECT 形漏翻曾致新鲜 PG 库
+#   init 失败，见 _OR_IGNORE_SELECT_RE）。
 # - ``PRAGMA table_info(<表>)`` -> information_schema 查询，
 #   返回 (cid, name, type, notnull, dflt_value, pk) 六元组，
 #   与 sqlite 的 PRAGMA table_info 行形状一致，调用方取 row[1]
@@ -422,6 +424,13 @@ _OR_REPLACE_PK = {
     "memory_settings": ("user_id",),
     "task_memory_flags": ("task_id",),
     "memory_extraction_log": ("task_id",),
+    # 审计循环状态单行表：主键 task_id。未登记时 Postgres 下
+    # INSERT OR REPLACE 退化为 ON CONFLICT DO NOTHING，已存在
+    # 行的 round / last_decision 等更新静默丢弃（2026-10-31
+    # PG 验证实测：跨进程竞态中包 round=2 而状态表 round 恒
+    # 为 1、轮次耗尽时 last_decision 仍为 pushback；SQLite
+    # 原生 OR REPLACE 测不出来，与自动记忆三张表同款坑）。
+    "task_audit_loop_state": ("task_id",),
 }
 
 _IDENTITY_TABLES = frozenset(
@@ -437,6 +446,13 @@ _OR_IGNORE_RE = _re.compile(
     r"^\s*INSERT\s+OR\s+IGNORE\s+INTO\s+(\w+)\s*\(([^)]+)\)\s*"
     r"VALUES\s*\((.*)\)\s*$",
     _re.IGNORECASE | _re.DOTALL)
+# INSERT OR IGNORE ... SELECT 形（VALUES 形之外的第二种写法，
+# 如配额回填）：PG 没有 OR IGNORE 语法，不翻译会直接报
+# syntax error at or near "OR"（2026-10-31 新鲜 PG 库复现）。
+_OR_IGNORE_SELECT_RE = _re.compile(
+    r"^\s*INSERT\s+OR\s+IGNORE\s+INTO\s+(\w+)\s*"
+    r"(\([^)]*\))?\s+SELECT\s+(.*)$",
+    _re.IGNORECASE | _re.DOTALL)
 _INSERT_TABLE_RE = _re.compile(
     r"^\s*INSERT\s+INTO\s+(?:\w+\.)?(\w+)", _re.IGNORECASE)
 _PRAGMA_INFO_RE = _re.compile(
@@ -506,6 +522,22 @@ def _translate_sql(sql):
             "INSERT INTO %s (%s) VALUES (%s) ON CONFLICT DO NOTHING"
             % (table, cols, values))
         return _convert_placeholders(translated), "normal"
+    m = _OR_IGNORE_SELECT_RE.match(stripped)
+    if m:
+        # INSERT OR IGNORE ... SELECT 形 -> INSERT INTO ... SELECT
+        # ... ON CONFLICT DO NOTHING：与 VALUES 形同款语义（任何
+        # 唯一冲突都跳过、不改已有行）。旧版只认 VALUES 形，SELECT
+        # 形原样透传到 PG，直接报 syntax error at or near "OR"；
+        # 配额回填就是 SELECT 形，init_db 里它的 except 又把整个
+        # 事务 rollback，migrate 的 ALTER 一并被丢掉（见 server
+        # _backfill_default_quotas 的保存点注释）。
+        table = m.group(1)
+        cols = m.group(2) or ""
+        select_body = m.group(3).rstrip().rstrip(";")
+        translated = (
+            "INSERT INTO %s %s SELECT %s ON CONFLICT DO NOTHING"
+            % (table, cols, select_body))
+        return _convert_placeholders(translated), "normal"
     translated = _AUTOINCREMENT_RE.sub(
         "BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY", sql)
     translated = _convert_placeholders(translated)
diff --git a/cloud/server.py b/cloud/server.py
index 8b73837..5b57450 100644
--- a/cloud/server.py
+++ b/cloud/server.py
@@ -1642,8 +1642,28 @@ def _backfill_default_quotas(conn):
 
     只补“users 里有、user_quotas 里无”的用户，已有行（含
     管理员显式设为 NULL 的不限额行）一律不动。返回补写行数。
+
+    失败只回滚到保存点，绝不回滚调用方的整个事务：init_db
+    里 migrate 的 ALTER 与它同事务，旧版 except 里整事务
+    rollback 会把 ALTER 一并丢掉（2026-10-31 新鲜 PG 库实测：
+    init 后 tasks 缺 paused_by_user / interrupted_reason，合流
+    随后在 PG“语句失败即 abort 整个事务”的语义下连环报
+    InFailedSqlTransaction）。成功时也不再由本函数提交，提交
+    由调用方负责（init_db 结尾统一提交；旧版成功时提交等于
+    提前提交 init 的全部 DDL，改后 init 恢复原子性）。调用方
+    只有 init_db 两处（均以提交收尾），改动不影响其它路径。
+    保存点在 SQLite 与 PG 下都支持；保存点本身建不起来时
+    （如连接已处 abort 态）退化为整事务 rollback 再返回 0。
     """
     _ensure_quotas_table(conn)
+    try:
+        conn.execute("SAVEPOINT backfill_default_quotas")
+    except Exception:
+        try:
+            conn.rollback()
+        except Exception:
+            pass
+        return 0
     try:
         cur = conn.execute(
             "INSERT OR IGNORE INTO user_quotas(user_id,"
@@ -1652,13 +1672,17 @@ def _backfill_default_quotas(conn):
             " LEFT JOIN user_quotas q ON q.user_id = u.id"
             " WHERE q.user_id IS NULL",
             (_default_quota_usd_micros(), time.time()))
-        conn.commit()
+        conn.execute("RELEASE SAVEPOINT backfill_default_quotas")
         return cur.rowcount or 0
     except Exception:
         try:
-            conn.rollback()
+            conn.execute("ROLLBACK TO SAVEPOINT backfill_default_quotas")
+            conn.execute("RELEASE SAVEPOINT backfill_default_quotas")
         except Exception:
-            pass
+            try:
+                conn.rollback()
+            except Exception:
+                pass
         return 0
 
 
diff --git a/cloud/tests/test_pg_init_fix.py b/cloud/tests/test_pg_init_fix.py
new file mode 100644
index 0000000..a0356fe
--- /dev/null
+++ b/cloud/tests/test_pg_init_fix.py
@@ -0,0 +1,309 @@
+"""PG init/backfill 回滚与审计状态 upsert 登记修复测试。
+
+只覆盖两处修复，不跑真实模型回合、不联网：
+- 问题一：新鲜 PG 库 init 后 tasks 缺 paused_by_user /
+  interrupted_reason，合流随后连环报 InFailedSqlTransaction。
+  根因是两层：(a) INSERT OR IGNORE ... SELECT 形在 PG 适配层
+  下未翻译，直接报 syntax error at or near "OR"；
+  (b) _backfill_default_quotas 的 except 整事务 rollback 把
+  同事务里 migrate 的 ALTER 一并丢掉。修法：翻译 SELECT 形、
+  backfill 改保存点 containment、成功时不再由本函数提交。
+- 问题二：task_audit_loop_state 未登记进 _OR_REPLACE_PK，
+  PG 下 INSERT OR REPLACE 退化为 ON CONFLICT DO NOTHING，
+  已存在行的 round / last_decision 等更新静默丢弃。
+
+PG 测试与 test_postgres_integration.py 同款口径：须显式设置
+CLOUD_TEST_PG_DSN 且装有 psycopg 驱动，否则 skip，绝不 fail；
+DSN 只从环境变量读，测试不打印它。
+"""
+
+import json
+import os
+import sqlite3
+import sys
+import tempfile
+import time
+import unittest
+from pathlib import Path
+from types import SimpleNamespace
+from unittest import mock
+
+try:
+    from cloud.audit_loop import LoopState, save_loop_state
+    from cloud.db import _translate_sql
+    from cloud.server import _backfill_default_quotas, init_db
+    from cloud.worker import Worker
+except ImportError:
+    sys.path.insert(0, str(Path(__file__).resolve().parents[2]))
+    from cloud.audit_loop import LoopState, save_loop_state
+    from cloud.db import _translate_sql
+    from cloud.server import _backfill_default_quotas, init_db
+    from cloud.worker import Worker
+
+try:
+    from cloud.tests.test_postgres_backend import (
+        _has_real_driver,
+        _real_pg_params,
+    )
+    _PG_PARAMS = _real_pg_params()
+except Exception:
+    _PG_PARAMS = None
+
+
+def _pg_env():
+    """返回 PG 测试用的环境变量 dict；无真实 PG 时返回 None。"""
+    if _PG_PARAMS is None or not _has_real_driver():
+        return None
+    host, port, dbname, user, password = _PG_PARAMS
+    return {
+        "CLOUD_DB_BACKEND": "postgres",
+        "CLOUD_DB_HOST": host,
+        "CLOUD_DB_PORT": str(port),
+        "CLOUD_DB_NAME": dbname,
+        "CLOUD_DB_USER": user,
+        "CLOUD_DB_PASSWORD": password,
+    }
+
+
+def _completed_runner(cmd):
+    return SimpleNamespace(returncode=0, stdout="{}", stderr="")
+
+
+class TranslateTestCase(unittest.TestCase):
+    def test_ignore_select_form_translated(self):
+        sql, kind = _translate_sql(
+            "INSERT OR IGNORE INTO user_quotas(user_id,"
+            " quota_usd_micros, updated_at)"
+            " SELECT u.id, ?, ? FROM users u"
+            " LEFT JOIN user_quotas q ON q.user_id = u.id"
+            " WHERE q.user_id IS NULL")
+        self.assertEqual(kind, "normal")
+        self.assertNotIn("OR IGNORE", sql)
+        self.assertIn("ON CONFLICT DO NOTHING", sql)
+        self.assertIn("%s", sql)
+        self.assertNotIn("?", sql)
+
+    def test_audit_loop_state_or_replace_updates(self):
+        sql, kind = _translate_sql(
+            "INSERT OR REPLACE INTO task_audit_loop_state"
+            "(task_id, round, passed_gates, criteria, last_decision,"
+            " updated_at) VALUES(?, ?, ?, ?, ?, ?)")
+        self.assertEqual(kind, "normal")
+        self.assertIn("ON CONFLICT (task_id) DO UPDATE SET", sql)
+        self.assertNotIn("DO NOTHING", sql)
+        self.assertIn("round = EXCLUDED.round", sql)
+        self.assertIn("last_decision = EXCLUDED.last_decision", sql)
+
+
+class SqliteBackfillTestCase(unittest.TestCase):
+    def setUp(self):
+        self.tmp = tempfile.TemporaryDirectory()
+        self.db_path = os.path.join(self.tmp.name, "control.db")
+
+    def tearDown(self):
+        self.tmp.cleanup()
+
+    def _conn_with_users(self):
+        conn = sqlite3.connect(self.db_path)
+        conn.execute("CREATE TABLE users(id TEXT PRIMARY KEY)")
+        conn.execute("INSERT INTO users(id) VALUES('u1')")
+        conn.commit()
+        return conn
+
+    def test_backfill_does_not_commit_caller_transaction(self):
+        # 旧版成功时 conn.commit()，会把调用方未提交的改动一并
+        # 提交；改后提交由调用方负责，rollback 后调用方的改动
+        # 与回填行应一并消失。
+        conn = self._conn_with_users()
+        try:
+            conn.execute("INSERT INTO users(id) VALUES('u2')")
+            self.assertEqual(_backfill_default_quotas(conn), 2)
+            conn.rollback()
+            users = [r[0] for r in conn.execute(
+                "SELECT id FROM users ORDER BY id").fetchall()]
+            self.assertEqual(users, ["u1"])
+            # 回滚连 _ensure 建的 user_quotas 表一起丢掉（同事务），
+            # 表不在即等于回填行已消失；表若在则行数必为 0。
+            tables = [r[0] for r in conn.execute(
+                "SELECT name FROM sqlite_master"
+                " WHERE name = 'user_quotas'").fetchall()]
+            if tables:
+                quotas = conn.execute(
+                    "SELECT COUNT(*) FROM user_quotas").fetchone()[0]
+                self.assertEqual(quotas, 0)
+        finally:
+            conn.close()
+
+    def test_backfill_failure_rolls_back_only_to_savepoint(self):
+        # user_quotas 缺 quota_usd_micros 列（_ensure 为
+        # CREATE TABLE IF NOT EXISTS，不会补列），INSERT 必失败；
+        # 旧版整事务 rollback 会把同事务里调用方的改动也丢掉，
+        # 保存点版只回滚回填本身。
+        conn = sqlite3.connect(self.db_path)
+        try:
+            conn.execute("CREATE TABLE users(id TEXT PRIMARY KEY)")
+            conn.execute(
+                "CREATE TABLE user_quotas(user_id TEXT PRIMARY KEY,"
+                " updated_at DOUBLE PRECISION)")
+            conn.execute("INSERT INTO users(id) VALUES('u1')")
+            conn.commit()
+            conn.execute("INSERT INTO users(id) VALUES('u2')")
+            self.assertEqual(_backfill_default_quotas(conn), 0)
+            users = [r[0] for r in conn.execute(
+                "SELECT id FROM users ORDER BY id").fetchall()]
+            self.assertEqual(users, ["u1", "u2"])
+        finally:
+            conn.close()
+
+
+class SqliteUpsertTestCase(unittest.TestCase):
+    def test_save_loop_state_updates_existing_row(self):
+        conn = sqlite3.connect(":memory:")
+        try:
+            conn.execute(
+                "CREATE TABLE task_audit_loop_state(task_id TEXT"
+                " PRIMARY KEY, round INTEGER, passed_gates TEXT,"
+                " criteria TEXT, last_decision TEXT,"
+                " updated_at DOUBLE PRECISION)")
+            save_loop_state(conn, LoopState(
+                task_id="P1", round=1, passed_gates=["child:a"],
+                criteria={"child:a": "child:a completes"},
+                last_decision="pushback"))
+            save_loop_state(conn, LoopState(
+                task_id="P1", round=2, passed_gates=["child:a"],
+                criteria={"child:a": "child:a completes"},
+                last_decision="escalate"))
+            conn.commit()
+            row = conn.execute(
+                "SELECT round, last_decision FROM task_audit_loop_state"
+                " WHERE task_id = 'P1'").fetchone()
+            self.assertEqual(row, (2, "escalate"))
+        finally:
+            conn.close()
+
+
+class PgInitFixTestCase(unittest.TestCase):
+    """真实 PG 测试：无 DSN/驱动时全部 skip。"""
+
+    def setUp(self):
+        env = _pg_env()
+        if env is None:
+            self.skipTest("未设置可达的 CLOUD_TEST_PG_DSN 或未装驱动，"
+                          "跳过真实 PG 测试")
+        self._patcher = mock.patch.dict(os.environ, env)
+        self._patcher.start()
+        self.addCleanup(self._patcher.stop)
+        self._old = os.environ.get("CODEX_PUSH_ALLOW_PRIVATE_TARGETS")
+        os.environ["CODEX_PUSH_ALLOW_PRIVATE_TARGETS"] = "1"
+        self.addCleanup(self._restore_push_env)
+        # 一次性库由外部建好并指向 DSN；init_db 直接跑，不做
+        # 任何夹具补偿（这正是本修复要证明的点）。
+        init_db(":memory:")
+        self.worker = Worker(":memory:", "/fake/host.py",
+                             runner=_completed_runner,
+                             env={"XCM_API_KEY": "test-placeholder"},
+                             max_retries=0, retry_backoff_seconds=0)
+        self.worker._audit = lambda p, a, d="": None
+
+    def _restore_push_env(self):
+        if self._old is None:
+            os.environ.pop("CODEX_PUSH_ALLOW_PRIVATE_TARGETS", None)
+        else:
+            os.environ["CODEX_PUSH_ALLOW_PRIVATE_TARGETS"] = self._old
+
+    def _pg(self):
+        from cloud.db import connect
+        return connect(":memory:")
+
+    def test_fresh_pg_init_then_merge_without_failed_transaction(self):
+        conn = self._pg()
+        try:
+            cols = {r[1] for r in conn.execute(
+                "PRAGMA table_info(tasks)").fetchall()}
+            self.assertIn("paused_by_user", cols)
+            self.assertIn("interrupted_reason", cols)
+            now = time.time()
+            conn.execute(
+                "INSERT INTO tasks(id, project_id, prompt, status,"
+                " idempotency_key, depends_on, priority, created_by,"
+                " created_at, updated_at, last_heartbeat, audit_loop,"
+                " parent_task_id, coordinator_part, result_text,"
+                " error_text, coordinator_parts, started_at)"
+                " VALUES('P1', 'p1', 'do', 'running', NULL, '[]', 0,"
+                " 'tester', ?, ?, NULL, 1, NULL, NULL, NULL, NULL,"
+                " ?, ?)",
+                (now, now,
+                 json.dumps([{"name": "a", "on_failure": "fail"}]), now))
+            conn.execute(
+                "INSERT INTO tasks(id, project_id, prompt, status,"
+                " idempotency_key, depends_on, priority, created_by,"
+                " created_at, updated_at, last_heartbeat, audit_loop,"
+                " parent_task_id, coordinator_part, result_text,"
+                " error_text, coordinator_parts, started_at)"
+                " VALUES('C1', 'p1', 'do', 'failed', NULL, '[]', 0,"
+                " 'tester', ?, ?, NULL, 0, 'P1', 'a', NULL, 'boom',"
+                " NULL, ?)",
+                (now, now, now))
+            conn.commit()
+        finally:
+            conn.close()
+        # 不做任何补偿重跑 migrate：直接调合流，旧代码下这里
+        # 会因缺列回落连环报 InFailedSqlTransaction。
+        out = self.worker._coord_audit_loop_merge(
+            {"id": "P1", "project_id": "p1", "audit_loop": 1},
+            [{"name": "a", "on_failure": "fail"}],
+            [{"name": "a", "id": "C1"}])
+        self.assertEqual(out["decision"], "pushback")
+
+    def test_pg_upsert_updates_existing_state_row(self):
+        conn = self._pg()
+        try:
+            save_loop_state(conn, LoopState(
+                task_id="P9", round=1, passed_gates=[],
+                criteria={}, last_decision="pushback"))
+            conn.commit()
+            save_loop_state(conn, LoopState(
+                task_id="P9", round=2, passed_gates=["child:a"],
+                criteria={"child:a": "child:a completes"},
+                last_decision="escalate"))
+            conn.commit()
+            row = conn.execute(
+                "SELECT round, passed_gates, criteria, last_decision"
+                " FROM task_audit_loop_state WHERE task_id = 'P9'"
+                ).fetchone()
+            self.assertEqual(row[0], 2)
+            self.assertEqual(json.loads(row[1]), ["child:a"])
+            self.assertEqual(json.loads(row[2]),
+                             {"child:a": "child:a completes"})
+            self.assertEqual(row[3], "escalate")
+        finally:
+            conn.close()
+
+    def test_pg_backfill_failure_preserves_caller_transaction(self):
+        # 与 SQLite 版同款保存点断言，跑在 PG 上：缺列导致
+        # INSERT 失败时，同事务里调用方的改动必须还在。
+        conn = self._pg()
+        try:
+            conn.execute("DROP TABLE IF EXISTS user_quotas")
+            conn.execute(
+                "CREATE TABLE user_quotas(user_id TEXT PRIMARY KEY,"
+                " updated_at DOUBLE PRECISION)")
+            conn.execute("CREATE TABLE IF NOT EXISTS users"
+                         "(id TEXT PRIMARY KEY)")
+            conn.execute("INSERT INTO users(id) VALUES('u9')"
+                         " ON CONFLICT DO NOTHING")
+            conn.commit()
+            conn.execute("INSERT INTO users(id) VALUES('u10')"
+                         " ON CONFLICT DO NOTHING")
+            self.assertEqual(_backfill_default_quotas(conn), 0)
+            users = [r[0] for r in conn.execute(
+                "SELECT id FROM users WHERE id IN ('u9', 'u10')"
+                " ORDER BY id").fetchall()]
+            self.assertEqual(users, sorted(["u9", "u10"]))
+            conn.rollback()
+        finally:
+            conn.close()
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/cloud/worker.py b/cloud/worker.py
index b6ded27..e006d91 100644
--- a/cloud/worker.py
+++ b/cloud/worker.py
@@ -5772,6 +5772,14 @@ class Worker:
                         " WHERE id = ?", (cid,)).fetchone()
                     fetched.append((cid, row))
             except Exception:
+                # PG 下语句失败即 abort 整个事务：缺列的首次查询
+                # 失败后，不先 rollback 就重查只会连环报
+                # InFailedSqlTransaction。本连接只做 SELECT，rollback
+                # 无副作用；SQLite 下同样无害。
+                try:
+                    conn.rollback()
+                except Exception:
+                    pass
                 try:
                     fetched = []
                     for cid in child_ids:
@@ -5781,6 +5789,10 @@ class Worker:
                             " FROM tasks WHERE id = ?", (cid,)).fetchone()
                         fetched.append((cid, row))
                 except Exception:
+                    try:
+                        conn.rollback()
+                    except Exception:
+                        pass
                     fetched = []
                     for cid in child_ids:
                         row = conn.execute(