diff --git a/scripts/m11b2c_patch_fixture_ddl.py b/scripts/m11b2c_patch_fixture_ddl.py
new file mode 100644
index 0000000..bd1821f
--- /dev/null
+++ b/scripts/m11b2c_patch_fixture_ddl.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""M11b-2c: 测试夹具 DDL 与列契约对齐补丁（只改 tests/，不动业务代码与表定义 JSON）。
+
+根因（实测）：tests/test_m11b2_single_tx.py 的 DDL_EVENT 把 id 声明为
+  `id INTEGER PRIMARY KEY AUTOINCREMENT`
+而 world_sync 侧列契约真源 models/pbl_runtime_event.json 明确 id = str(32)、由应用层
+new_row_id()（uuid4 hex）生成并在 INSERT 列集中显式提交（见该文件 summary.comment
+「id 生成方 · 单一口径，QC #4」）。写路径插入 32 位十六进制字符串到 INTEGER 主键列
+=> sqlite3.IntegrityError: datatype mismatch，TestNormalWrite/TestAtomicRollback/
+TestConcurrency/TestLatency 全部连坐失败。属夹具建表与契约不一致，修夹具即可。
+
+补丁做法：把 DDL_EVENT 中 id 列改为 `id TEXT PRIMARY KEY`（SQLite 下 TEXT 主键合法，
+且与 str(32) 契约一致），去掉 AUTOINCREMENT（契约不依赖数据库自增）。
+"""
+import io
+import os
+import sys
+
+TARGET = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
+                      "tests", "test_m11b2_single_tx.py")
+
+OLD = "  id INTEGER PRIMARY KEY AUTOINCREMENT,\n  tenant_id TEXT NOT NULL,\n  event_uid TEXT NOT NULL,"
+NEW = "  id TEXT PRIMARY KEY,   -- M11b-2c fixture fix: contract id = str(32) app-generated (uuid4 hex), not AUTOINCREMENT\n  tenant_id TEXT NOT NULL,\n  event_uid TEXT NOT NULL,"
+
+
+def main():
+    with io.open(TARGET, "r", encoding="utf-8") as f:
+        src = f.read()
+    n = src.count(OLD)
+    if n == 0:
+        if NEW.split(",")[0] in src:
+            print("SKIP: fixture DDL already patched (id TEXT PRIMARY KEY)")
+            return 0
+        print("FAIL: anchor text not found in %s" % TARGET)
+        return 1
+    if n > 1:
+        print("FAIL: anchor text found %d times, refusing ambiguous patch" % n)
+        return 1
+    src = src.replace(OLD, NEW)
+    with io.open(TARGET, "w", encoding="utf-8") as f:
+        f.write(src)
+    print("OK: patched %s (1 occurrence) -> id TEXT PRIMARY KEY" % TARGET)
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/scripts/m11b4_latency_report.json b/scripts/m11b4_latency_report.json
index dd8a36b..8f099d4 100644
--- a/scripts/m11b4_latency_report.json
+++ b/scripts/m11b4_latency_report.json
@@ -4,14 +4,14 @@
   "lost": 0,
   "via_broadcast": 200,
   "via_polling_fallback": 0,
-  "p50_ms": 1.042,
-  "p90_ms": 1.232,
-  "p99_ms": 1.997,
-  "max_ms": 3.124,
+  "p50_ms": 0.651,
+  "p90_ms": 0.7,
+  "p99_ms": 0.752,
+  "max_ms": 0.934,
   "segment_p99_ms": {
-    "write_commit": 1.971,
-    "broadcast_emit": 0.354,
-    "consume_wait": 0.176
+    "write_commit": 0.735,
+    "broadcast_emit": 0.044,
+    "consume_wait": 0.018
   },
   "bottleneck_segment": "write_commit",
   "slo_ms": 1000.0,
@@ -24,7 +24,7 @@
     "direct_publish": 0,
     "queued": 200,
     "subscriber_errors": 0,
-    "max_latency_ms": 0.408,
+    "max_latency_ms": 0.14,
     "in_flight": 0,
     "latency_samples": 200,
     "last_error": null,
@@ -32,2011 +32,2011 @@
     "channels": [
       "in_process"
     ],
-    "p50_latency_ms": 0.136,
-    "p99_latency_ms": 0.292
+    "p50_latency_ms": 0.077,
+    "p99_latency_ms": 0.101
   },
   "samples": [
     {
       "scene_id": "sc_bench",
-      "event_id": "3d493faaf7bf44108d741d1b09707388",
-      "t_write_ms": 1.417,
-      "t_broadcast_emit_ms": 0.087,
-      "t_consume_ms": 0.039,
-      "e2e_ms": 1.457,
+      "event_id": "aab8de9aed004472999d0d952499176a",
+      "t_write_ms": 0.902,
+      "t_broadcast_emit_ms": 0.066,
+      "t_consume_ms": 0.032,
+      "e2e_ms": 0.934,
       "via": "broadcast",
       "perceived": true
     },
     {
       "scene_id": "sc_bench",
-      "event_id": "ea9f10fded404222b8cfbf4436b76564",
-      "t_write_ms": 0.866,
-      "t_broadcast_emit_ms": 0.055,
-      "t_consume_ms": 0.026,
-      "e2e_ms": 0.892,
+      "event_id": "c50319e937cd46d5a2a90a6086c84fbe",
+      "t_write_ms": 0.681,
+      "t_broadcast_emit_ms": 0.038,
+      "t_consume_ms": 0.018,
+      "e2e_ms": 0.699,
       "via": "broadcast",
       "perceived": true
     },
     {
       "scene_id": "sc_bench",
-      "event_id": "26c5f1cf72914cd7875c7ebbe18bb351",
-      "t_write_ms": 0.724,
-      "t_broadcast_emit_ms": 0.057,
-      "t_consume_ms": 0.02,
-      "e2e_ms": 0.744,
+      "event_id": "30452c57d14546568d8a9cfd9d5abddc",
+      "t_write_ms": 0.626,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.641,
       "via": "broadcast",
       "perceived": true
     },
     {
       "scene_id": "sc_bench",
-      "event_id": "6c89dd83c9444f669f4aa4b82df57b27",
-      "t_write_ms": 1.255,
-      "t_broadcast_emit_ms": 0.061,
-      "t_consume_ms": 0.021,
-      "e2e_ms": 1.277,
+      "event_id": "eb89e6e733714b1cb136dbed1cc31157",
+      "t_write_ms": 0.629,
+      "t_broadcast_emit_ms": 0.036,
+      "t_consume_ms": 0.018,
+      "e2e_ms": 0.647,
       "via": "broadcast",
       "perceived": true
     },
     {
       "scene_id": "sc_bench",
-      "event_id": "a67f462659d94f0c9854639779eb6704",
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-      "t_broadcast_emit_ms": 0.047,
-      "t_consume_ms": 0.022,
-      "e2e_ms": 0.837,
+      "event_id": "eb14bc2b73d74b7cbbe4ff3b0b59e370",
+      "t_write_ms": 0.648,
+      "t_broadcast_emit_ms": 0.03,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.662,
       "via": "broadcast",
       "perceived": true
     },
     {
       "scene_id": "sc_bench",
-      "event_id": "b69867c8633540088c0e3e4285e17dd2",
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-      "t_broadcast_emit_ms": 2.203,
-      "t_consume_ms": 0.025,
-      "e2e_ms": 0.936,
+      "event_id": "0ee604b10785443aa6b86fe831287a1b",
+      "t_write_ms": 0.662,
+      "t_broadcast_emit_ms": 0.036,
+      "t_consume_ms": 0.017,
+      "e2e_ms": 0.68,
       "via": "broadcast",
       "perceived": true
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     {
       "scene_id": "sc_bench",
-      "event_id": "0f3c45b7f60148f88fac4a474238c2cc",
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-      "t_consume_ms": 0.024,
-      "e2e_ms": 1.254,
+      "event_id": "946072c762ef427d834295da25b148ce",
+      "t_write_ms": 0.598,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.613,
       "via": "broadcast",
       "perceived": true
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       "scene_id": "sc_bench",
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-      "e2e_ms": 1.159,
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       "via": "broadcast",
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-      "e2e_ms": 1.181,
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+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.643,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "36908f93ef8049de82ebf632382f67b2",
+      "t_write_ms": 0.606,
+      "t_broadcast_emit_ms": 0.031,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.62,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "2ae234bc38aa475baf50d864d523eb8e",
+      "t_write_ms": 0.645,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.66,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "d9cbc02323d24c229b44b622596f73ae",
+      "t_write_ms": 0.644,
+      "t_broadcast_emit_ms": 0.034,
+      "t_consume_ms": 0.016,
+      "e2e_ms": 0.66,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "e3fb3cad2f99451c8e62e67ebb0fc176",
+      "t_write_ms": 0.651,
+      "t_broadcast_emit_ms": 0.034,
+      "t_consume_ms": 0.016,
+      "e2e_ms": 0.667,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "2b505ecc60cd4cd09e6bc1d0a4c8f256",
+      "t_write_ms": 0.731,
+      "t_broadcast_emit_ms": 0.033,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.745,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "7e997c35850d463ca0eca58faa38937d",
+      "t_write_ms": 0.673,
+      "t_broadcast_emit_ms": 0.031,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.688,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "4ca8d667d819461ca221da30ceb819f2",
+      "t_write_ms": 0.645,
+      "t_broadcast_emit_ms": 0.031,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.659,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "16d25b5682d94d68be5aa4f62f59528b",
+      "t_write_ms": 0.642,
+      "t_broadcast_emit_ms": 0.036,
+      "t_consume_ms": 0.017,
+      "e2e_ms": 0.659,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "318a57da617c4d44b4e1b3fc33a0eaad",
+      "t_write_ms": 0.678,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.693,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "568d000f229a41c484397d22dde41d04",
+      "t_write_ms": 0.755,
+      "t_broadcast_emit_ms": 0.035,
+      "t_consume_ms": 0.017,
+      "e2e_ms": 0.773,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "78b8ea2fc59a4fb596df5f0f07fe7341",
+      "t_write_ms": 0.624,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.638,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "4ecd5766d46744e2a377db9fe6b370bd",
+      "t_write_ms": 0.686,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.7,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "1eeddc3918214118b947024254446ecb",
+      "t_write_ms": 0.698,
+      "t_broadcast_emit_ms": 0.033,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.713,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "02f47c781ef24fa4a1f58f29dc711987",
+      "t_write_ms": 0.693,
+      "t_broadcast_emit_ms": 0.035,
+      "t_consume_ms": 0.017,
+      "e2e_ms": 0.71,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "c86834941a1442308b7ce0a671dad6d5",
+      "t_write_ms": 0.658,
+      "t_broadcast_emit_ms": 0.035,
+      "t_consume_ms": 0.017,
+      "e2e_ms": 0.675,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "3479b75358d648d9a1932ecda3f76dbe",
+      "t_write_ms": 0.715,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.73,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "90ba579f58aa421498c29606f7941afc",
+      "t_write_ms": 0.676,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.691,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "35264a313ad74eeeb710a9bb0d77909c",
+      "t_write_ms": 0.636,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.65,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "d6a127b8766e454797480167c490536f",
+      "t_write_ms": 0.633,
+      "t_broadcast_emit_ms": 0.035,
+      "t_consume_ms": 0.017,
+      "e2e_ms": 0.65,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "a7682a23b08a438aa06dca4b9023a92c",
+      "t_write_ms": 0.662,
+      "t_broadcast_emit_ms": 0.03,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.675,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "508d7a54fbc248e19c7db0c13dc07a08",
+      "t_write_ms": 0.698,
+      "t_broadcast_emit_ms": 0.035,
+      "t_consume_ms": 0.016,
+      "e2e_ms": 0.714,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "77e3cc124cc54ba5864fc614141cf427",
+      "t_write_ms": 0.62,
+      "t_broadcast_emit_ms": 0.037,
+      "t_consume_ms": 0.017,
+      "e2e_ms": 0.637,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "cc40e8d9e2824828a5c7aeebb030d383",
+      "t_write_ms": 0.646,
+      "t_broadcast_emit_ms": 0.031,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.659,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "1dcc87eea5b64cbabaf5dcf54bb109f9",
+      "t_write_ms": 0.618,
+      "t_broadcast_emit_ms": 0.031,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.632,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "aff755a33ef04444a2296a9b0cae265c",
+      "t_write_ms": 0.646,
+      "t_broadcast_emit_ms": 0.035,
+      "t_consume_ms": 0.017,
+      "e2e_ms": 0.663,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "19fd451c90034c7ebd151d0434a8fdd8",
+      "t_write_ms": 0.645,
+      "t_broadcast_emit_ms": 0.031,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.658,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "b38d2a7e0a884c2d95580ceb9647e805",
+      "t_write_ms": 0.671,
+      "t_broadcast_emit_ms": 0.034,
+      "t_consume_ms": 0.016,
+      "e2e_ms": 0.687,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "5d6fc72d22614a46af3bc0d906cf1884",
+      "t_write_ms": 0.628,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.643,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "b3f98e4591ef41a1b6133750cf53567c",
+      "t_write_ms": 0.641,
+      "t_broadcast_emit_ms": 0.031,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.656,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "379e764f52c64fc5b02751a982fd915a",
+      "t_write_ms": 0.636,
+      "t_broadcast_emit_ms": 0.031,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.65,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "eddcb995d4084b929331a36aff0da672",
+      "t_write_ms": 0.648,
+      "t_broadcast_emit_ms": 0.035,
+      "t_consume_ms": 0.017,
+      "e2e_ms": 0.664,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "10086dc8508a4dbbbdba2d9e43ffe6b8",
+      "t_write_ms": 0.698,
+      "t_broadcast_emit_ms": 0.04,
+      "t_consume_ms": 0.018,
+      "e2e_ms": 0.715,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "60981466c4b4474ab45ef37b87578d2d",
+      "t_write_ms": 0.651,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.665,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "464a550caa4a464d91239090db18d638",
+      "t_write_ms": 0.648,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.014,
+      "e2e_ms": 0.662,
+      "via": "broadcast",
+      "perceived": true
+    },
+    {
+      "scene_id": "sc_bench",
+      "event_id": "0541c441ac6d4480949283234128d464",
+      "t_write_ms": 0.686,
+      "t_broadcast_emit_ms": 0.032,
+      "t_consume_ms": 0.015,
+      "e2e_ms": 0.7,
       "via": "broadcast",
       "perceived": true
     }
   ],
   "verdict": "PASS",
-  "run_at": "2026-09-22 13:56:47 +0800"
+  "run_at": "2026-09-22 14:45:43 +0800"
 }
\ No newline at end of file
diff --git a/scripts/m11b4_selftest_output.txt b/scripts/m11b4_selftest_output.txt
index 16ed38e..5e1a480 100644
--- a/scripts/m11b4_selftest_output.txt
+++ b/scripts/m11b4_selftest_output.txt
@@ -1,5 +1,5 @@
 # M11b-4 自测留证
-# 生成时间: 2026-09-22 13:56:43 +0800
+# 生成时间: 2026-09-22 14:45:39 +0800
 # 命令: cd modules/world_sync && .venv/bin/python scripts/m11b4_selftest.py
 # Python: 3.10.12
 
@@ -7,21 +7,21 @@
 AC1 广播丢失 → 3s 轮询补漏（真实 3s 节奏）
 ==============================================================================
   interval=3.0s  run() 结果={"polls": 1, "recovered_count": 1, "found": true, "stopped_by": "event_matched"}
-  墙钟耗时=3000.5ms（含 1 次真实 3s sleep）  on_recovered 回调次数=1
-  兜底计数器={"polls": 1, "queries": 1, "recovered": 1, "duplicated": 0, "missed_by_broadcast": 1, "timeouts": 0, "stops_on_notify": 0, "scenes": ["sc_ac1_1790056603"], "interval": 3.0, "timeout": 10.0}
+  墙钟耗时=3000.6ms（含 1 次真实 3s sleep）  on_recovered 回调次数=1
+  兜底计数器={"polls": 1, "queries": 1, "recovered": 1, "duplicated": 0, "missed_by_broadcast": 1, "timeouts": 0, "stops_on_notify": 0, "scenes": ["sc_ac1_1790059539"], "interval": 3.0, "timeout": 10.0}
 [PASS] AC1.1 轮询间隔常量 = 3.0s  -> 3.0
 [PASS] AC1.2 广播丢失时 found=True（补到漏网事件）
 [PASS] AC1.3 stopped_by=event_matched（非 timeout）  -> event_matched
-[PASS] AC1.4 补漏耗时 ≤ SLO 3000ms + 500ms 调度容差（1 个轮询周期内）  -> 3000.5ms <= 3500.0ms
-[PASS] AC1.5 推进后的水位线 >= 事件 created_at  -> 2026-09-22 05:56:43 >= 2026-09-22 05:56:43
+[PASS] AC1.4 补漏耗时 ≤ SLO 3000ms + 500ms 调度容差（1 个轮询周期内）  -> 3000.6ms <= 3500.0ms
+[PASS] AC1.5 推进后的水位线 >= 事件 created_at  -> 2026-09-22 06:45:39 >= 2026-09-22 06:45:39
 
 ==============================================================================
 AC1b 已投递事件不重复补漏（同秒撞秒 + event_uid 去重双保险）
 ==============================================================================
-  第1轮 recovered=1  第2轮 recovered=0（水位线=2026-09-22 05:56:43）
+  第1轮 recovered=1  第2轮 recovered=0（水位线=2026-09-22 06:45:39）
 [PASS] AC1b.1 首轮补到 1 条
 [PASS] AC1b.2 次轮 0 条（水位线+已投递集合去重）
-  同秒新事件 uid=ac1b-a50a12b3debf921e created_at=2026-09-22 05:56:43 -> recovered=1 found=True
+  同秒新事件 uid=ac1b-91ac6c3b6096a027 created_at=2026-09-22 06:45:39 -> recovered=1 found=True
 [PASS] AC1b.3 同秒新事件仍被补到（>= 水位线 + NOT IN 去重）
 
 ==============================================================================
@@ -36,9 +36,9 @@ AC1c 水位线格式守卫（ISO 格式必须被拒绝，否则静默丢事件
 ==============================================================================
 AC1d 广播正常 → 轮询立即停止（stopped_by=broadcast_received）
 ==============================================================================
-  run()={"polls": 1, "found": false, "stopped_by": "broadcast_received"}  墙钟=200.9ms（远小于 3s 周期）
+  run()={"polls": 1, "found": false, "stopped_by": "broadcast_received"}  墙钟=200.8ms（远小于 3s 周期）
 [PASS] AC1d.1 收到广播后停止
-[PASS] AC1d.2 未走满轮询周期  -> 200.9ms
+[PASS] AC1d.2 未走满轮询周期  -> 200.8ms
 [PASS] AC1d.3 notified 短路后 polls 计数=1  -> 1
 
 ==============================================================================
@@ -57,22 +57,22 @@ AC2 补漏查询 EXPLAIN：必须命中 ix_scene_created，禁止全表扫描
 AC3 端到端时延基准：裁决→write_event_with_state→COMMIT→广播→消费端感知
 ==============================================================================
   样本数 n=200  SLO=1000ms  dialect=sqlite(file=m11b4.sqlite)
-  基准总耗时 0.22s
-  分段 P99: {"write_commit": 1.971, "broadcast_emit": 0.354, "consume_wait": 0.176}
+  基准总耗时 0.14s
+  分段 P99: {"write_commit": 0.735, "broadcast_emit": 0.044, "consume_wait": 0.018}
   瓶颈段  : write_commit
   感知路径: broadcast=200 polling_fallback=0 lost=0
-  广播统计: {"published": 200, "dropped_disabled": 0, "failed": 0, "retried": 0, "direct_publish": 0, "queued": 200, "subscriber_errors": 0, "max_latency_ms": 0.408, "in_flight": 0, "latency_samples": 200, "last_error": null, "enabled": true, "channels": ["in_process"], "p50_latency_ms": 0.136, "p99_latency_ms": 0.292}
-  P50=1.042ms  P90=1.232ms  P99=1.997ms  max=3.124ms
+  广播统计: {"published": 200, "dropped_disabled": 0, "failed": 0, "retried": 0, "direct_publish": 0, "queued": 200, "subscriber_errors": 0, "max_latency_ms": 0.14, "in_flight": 0, "latency_samples": 200, "last_error": null, "enabled": true, "channels": ["in_process"], "p50_latency_ms": 0.077, "p99_latency_ms": 0.101}
+  P50=0.651ms  P90=0.700ms  P99=0.752ms  max=0.934ms
   裁决    : PASS
 [PASS] AC3.1 全部样本被感知（无丢失）  -> lost=0
 [PASS] AC3.2 感知全部走广播（兜底未介入正常链路）  -> 200/200
-[PASS] AC3.3 P99 ≤ 1000ms  -> P99=1.997ms
+[PASS] AC3.3 P99 ≤ 1000ms  -> P99=0.752ms
 
 ==============================================================================
 AC3b 广播丢失时的时延归入 polling_fallback（>1s 是设计使然，单独统计）
 ==============================================================================
   兜底计数器: {"polls": 1, "queries": 1, "recovered": 1, "duplicated": 0, "missed_by_broadcast": 1, "timeouts": 0, "stops_on_notify": 0, "scenes": ["sc_x_lost"], "interval": 0.2, "timeout": 5.0}
-  样本: {"scene_id": "sc_x_lost", "event_id": "f3de147964fb4f879b5342139e6d7e88", "t_write_ms": 0.718, "t_broadcast_emit_ms": 0.004, "t_consume_ms": 250.654, "e2e_ms": 251.373, "via": "polling_fallback", "perceived": true}
+  样本: {"scene_id": "sc_x_lost", "event_id": "21b5e89192ea46b1b753182e1bae6810", "t_write_ms": 0.721, "t_broadcast_emit_ms": 0.005, "t_consume_ms": 251.23, "e2e_ms": 251.951, "via": "polling_fallback", "perceived": true}
 [PASS] AC3b.1 广播丢失时经轮询兜底仍被感知
 [PASS] AC3b.2 报告把它与广播路径分开统计（不混入 P99 判定）
 [PASS] AC3b.3 兜底确实发起了补漏查询（polls>=1 且 recovered>=1）  -> polls=1 recovered=1
@@ -130,7 +130,7 @@ AC5 对外门面可调用性（防漏注册导致 NameError）
   OK   AC5.4 fallback_stats 返回计数快照
 
   31/31 通过
-  时延报告: P50=1.042ms P90=1.232ms P99=1.997ms max=3.124ms verdict=PASS
+  时延报告: P50=0.651ms P90=0.700ms P99=0.752ms max=0.934ms verdict=PASS
   报告 JSON 落盘: /d/pipeline/workspaces/0/sdlc_general/modules/world_sync/scripts/m11b4_latency_report.json
 
   RESULT: PASS  FAILURES=0
diff --git a/skill/SKILL.md b/skill/SKILL.md
index b3dec72..dea806c 100644
--- a/skill/SKILL.md
+++ b/skill/SKILL.md
@@ -87,7 +87,8 @@ polling 与写入端事务模块 import 零交集、补漏 SQL 只读 `pbl_runti
 | `POLL_INTERVAL_S` | `3.0` | 轮询周期（验收口径「广播丢失 3s 内补漏」= 1 个周期） |
 | `POLL_TIMEOUT_S` | `30.0` | 兜底循环总超时默认值（超时即停并计 `timeouts`，不造僵尸定时器）；selftest 显式传 `10.0` |
 | `POLL_LIMIT` | `500` | 单轮补漏 LIMIT，防一次拉爆；剩余下一轮继续 |
-| `FALLBACK_SLO_MS` | `3000.0` | 补漏 SLO = 1 个轮询周期 |
+| `FALLBACK_SLO_MS` | `3000.0` | 补漏 SLO = 1 个轮询周期。**AC1.4 判定式为 `wall_ms <= FALLBACK_SLO_MS + SLO_TOLERANCE_MS`（≤3500ms），不是 ≤3000ms** |
+| `SLO_TOLERANCE_MS` | `500.0` | AC1.4 调度容差（源码常量，已三处同步导出/登记；来源=真实 `sleep(3.0)` 唤醒抖动 + 单次周期边界，墙钟恒 ≥3000ms）。测试侧禁止本地重复定义 |
 | `SEEN_IDS_IN_SQL` | `200` | 已投递 `event_uid` 参与 SQL `NOT IN` 的最大长度（防参数爆炸） |
 | `E2E_LATENCY_SLO_MS` | `1000.0` | 端到端感知时延 SLO（P99 口径，仅统计广播路径样本） |
 
@@ -104,8 +105,15 @@ polling 与写入端事务模块 import 零交集、补漏 SQL 只读 `pbl_runti
 - MySQL：`plan_uses_scene_index(explain_poll_query(...))` → True 才算合规；`type=ALL` 判 False。测试库凭据不可用时该项记 skipped，须在交付件标注环境受限（勿写 PASS）。
 
 ### 消费端接线方式
-- 消费端订阅广播：`subscribe_broadcast(handler)`；handler 里调 `get_fallback().notify_broadcast(msg, created_at=write_result["created_at"])`（`msg` = M11b-3 广播消息 dict）—— 置位 `notified` 短路标记并推进水位线，**当轮立即停止轮询**（实测墙钟 200.8ms，未走满 3s 周期）。广播消息只有 ISO `commit_ts_text`，**不能**直接当水位线用，须把写入端返回的库内格式 `created_at` 传进来，否则水位线不推进。
+- 消费端订阅广播：`subscribe_broadcast(handler)`；handler 里调 `get_fallback().notify_broadcast(msg, created_at=write_result["created_at"])`（`msg` = M11b-3 广播消息 dict）—— 置位 `notified` 短路标记并推进水位线，**当轮立即停止轮询**（留证运行 `run_at=2026-09-22 14:45:43 +0800`：AC1d 墙钟 200.8ms，未走满 3s 周期）。广播消息只有 ISO `commit_ts_text`，**不能**直接当水位线用，须把写入端返回的库内格式 `created_at` 传进来，否则水位线不推进。
 - 兜底循环的启停由**宿主/消费端自己掌握**：把 `run_fallback()` / `PollingFallback.run()` 放进宿主自己的定时器或线程。**模块不自建后台线程**，避免污染写入端生命周期。
+### 留证实测数值（唯一数值源：`scripts/m11b4_latency_report.json`，`run_at=2026-09-22 14:45:43 +0800`，n=200，sqlite）
+- 端到端感知时延：`P50=0.651ms / P90=0.700ms / P99=0.752ms / max=0.934ms`，`slo_ms=1000.0`、`slo_passed=true`、`verdict=PASS`；感知路径 `via_broadcast=200 / via_polling_fallback=0 / lost=0`。
+- 分段 P99：`write_commit=0.735 / broadcast_emit=0.044 / consume_wait=0.018`，`bottleneck_segment=write_commit`。
+- 广播侧 `broadcast_stats`：`p50_latency_ms=0.077 / p99_latency_ms=0.101 / max_latency_ms=0.14`，`published=200 / queued=200 / failed=0 / retried=0 / dropped_disabled=0 / subscriber_errors=0 / in_flight=0 / last_error=null`，通道 `["in_process"]`。
+- 兜底介入路径（AC3b 加速参数 interval=0.2s / timeout=5.0s）：`e2e_ms=251.951`、`via=polling_fallback`、`perceived=true`、`polls=1 / recovered=1 / missed_by_broadcast=1`。
+- 引用上述数字时**逐字段照抄该 JSON 并标注 `run_at`**；改代码重跑后必须同步刷新本文与 dev-notes（QC #12）。
+
 - 广播丢失（`missed_by_broadcast` 计数 +1）时靠轮询补漏，该路径样本时延 ≥ 1 个周期，由 `via_polling_fallback` 单独统计，**不混入 P99 ≤ 1s 判定**（否则会把「兜底代价」误报成「链路超标」）。
 
 ## 陷阱
diff --git a/tests/test_m11b2_single_tx.py b/tests/test_m11b2_single_tx.py
index 381f1c2..cc0cba0 100644
--- a/tests/test_m11b2_single_tx.py
+++ b/tests/test_m11b2_single_tx.py
@@ -72,7 +72,7 @@ TransactionAborted = errs.TransactionAborted
 
 DDL_EVENT = """
 CREATE TABLE IF NOT EXISTS pbl_runtime_event (
-  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  id TEXT PRIMARY KEY,   -- M11b-2c fixture fix: contract id = str(32) app-generated (uuid4 hex), not AUTOINCREMENT
   tenant_id TEXT NOT NULL,
   event_uid TEXT NOT NULL,
   event_code TEXT,