diff --git a/docs/inner/fingerprint-windows-baseline-2026-09-12.md b/docs/inner/fingerprint-windows-baseline-2026-09-12.md
new file mode 100644
index 0000000000..4bb0b745dd
--- /dev/null
+++ b/docs/inner/fingerprint-windows-baseline-2026-09-12.md
@@ -0,0 +1,67 @@
+# Fingerprint Pro：Windows 身份对照的进展与阻塞
+
+## 本次结论
+
+本次没有修改产品默认身份，也没有将 Linux UA override 当成 Windows
+浏览器。**真正的 Windows Chrome 对照仍未完成**：当前会话只有 Linux
+主机，尚未获得可用的 Windows 机器或已授权端点。没有据此猜测、修改
+Navigator、字体或商业站点的结果。
+
+已新增独立采集入口
+`moli_cdp_smoke.diagnostics.fingerprint_identity`，Windows 上的运行方法见
+`moli-cdp-smoke/DIAGNOSTICS.md`。`--require-windows` 会拒绝 Linux/macOS；
+输出保留宿主 OS、浏览器版本、可执行文件 SHA-256、原生 Navigator/UA-CH
+和服务端结果的白名单字段。没有伪装 OS 或读取用户现有 Chrome profile。
+
+## 2026-09-12 的同机补充采样
+
+二进制由 `2264ea6db` 加本次 InputEvent 改动构建，Moli release SHA-256：
+`e4f3d498a836436f0325bb42779688a805c23726456be8e9c695ea62bd2ba382`。
+对照为 `/usr/bin/chromium` 145.0.7632.116，xvfb headed，非 headless。
+两端均新进程、新 context，CDP Runtime/Page/Network 开启，无 UA override，
+无代理，保留 TLS 校验。DOMContentLoaded 后观察 12 秒，然后才读取 identity。
+
+| 项目 | Moli 默认 Windows identity，Linux 后端 | Chromium 原生 Linux |
+| --- | --- | --- |
+| 有效结果 | HTTP 200，约 4.70 秒收到 | HTTP 200，约 3.00 秒收到 |
+| bot | not_detected | not_detected |
+| tampering / suspect_score | true / 22 | false / 12 |
+| tampering_ml_score | 0.9998 | 0 |
+| 七项 font_preferences | 149.3125、149.3125、144.015625、133.0625、149.3125、9.34375、162 | 全部相同 |
+| touch_event / touch_start / max_touch_points | false / false / 0 | 相同 |
+| fonts | 空列表 | 空列表 |
+
+字段顺序为 default、serif、sans、mono、apple、min、system。这里的 fonts
+是本次 Fingerprint Pro 的输出，不是之前 CreepJS 的字体数量。
+
+仍存在的观察差别包括平台、语言、screen、hardwareConcurrency、audio 和
+math 的结果；这些不是已经证实的触发原因。尤其两端的 V8 版本也不同，不能
+将任何一个 hash 的差别直接解释成 Windows 身份矛盾。其他会话当时仍有
+Cargo 构建，环境文件保留 load average；本轮不是隔离负载的 timing 实验。
+
+历史 OS-only 对照见 `cdp-fingerprint-identity-status-2026-09-10.md`：
+改变 OS identity 这一组能够改变判定，但并没有定位商业模型的单一规则。
+本轮字体偏好与触摸字段已经一致而 verdict 仍不同，再次说明不能继续把
+“调整这七项宽度”当作已有证据支持的修复。
+
+## 下一步需要的证据
+
+1. 在真正 Windows Chrome 上运行采集器，记录 Windows/Chrome 版本和字体环境。
+2. 比较原生 UA-CH 与站点实际收到的 raw attributes，先列可复现差异。
+3. 对具体 Web API 用最小离线探针验证；只修确定的兼容性问题。
+4. 保持 Moli 的 Windows 默认身份，不覆盖站点检测脚本、请求或结果。
+
+Windows 启动路径尚未做真实执行验证。Linux 下通过的 guard、字段筛选单测
+不能替代这一步，也不能声称本任务已取得 Windows 基线。
+
+## 采样与工具验证记录
+
+- `docs/inner/fp-native-moli-20260912-direct/`：本次 Moli 有效结果。
+- `docs/inner/fp-native-chromium-20260912/`：本次 Chromium 有效结果。
+- `docs/inner/fp-native-moli-20260912-input-event/`：首次工具启动受驱动 HTTP
+  discovery 的代理环境影响，连接失败，**尚未导航到站点**；保留为工具失败，
+  不计为网站样本。修正为使用已直连发现的 WebSocket URL 后才执行上述采样。
+- 采集器白名单、API URL 筛选、真实 Windows guard 的三个专项单元测试通过。
+
+原始目录仅留本地。提交的文档不包含 visitor ID、IP、cookies、SDK token
+或未筛选的站点响应。
diff --git a/moli-cdp-smoke/DIAGNOSTICS.md b/moli-cdp-smoke/DIAGNOSTICS.md
new file mode 100644
index 0000000000..0e0c9aa426
--- /dev/null
+++ b/moli-cdp-smoke/DIAGNOSTICS.md
@@ -0,0 +1,51 @@
+# Optional live-site diagnostics
+
+These collectors are **not** CI smoke tests or assertions that a commercial
+detector must accept automation. They keep failures and missing verdicts as
+evidence instead of retrying until a site returns a desired result.
+
+Run from `moli-cdp-smoke` with its Python dependencies installed (`uv sync`).
+Use a fresh output directory for every invocation. Each collector starts its
+own browser, uses a disposable context, enables CDP Runtime/Page/Network,
+leaves identity and site scripts untouched, and terminates its browser.
+Browser traffic is direct, with TLS verification left enabled. On Linux use
+`xvfb-run -a` for **headed** Chromium, not `--headless`.
+
+## Fingerprint Pro: a real Windows baseline
+
+Run this on Windows, with a native Chrome installation:
+
+```powershell
+uv run python -m moli_cdp_smoke.diagnostics.fingerprint_identity `
+  --engine chromium `
+  --binary 'C:\Program Files\Google\Chrome\Application\chrome.exe' `
+  --require-windows --output windows-fp-baseline
+```
+
+`--require-windows` refuses Linux/macOS hosts. Changing a UA on Linux is not
+a Windows baseline. The collector records host OS, binary SHA-256, browser
+version and native Navigator/UA-CH values; it does not set UA overrides.
+Record the Windows version and installed font environment when comparing
+results. Browser-version and machine differences are potential confounders,
+not evidence that a single identity field caused a commercial verdict.
+
+For Moli, keep the same command but use `--engine moli`, its local binary,
+and omit `--require-windows` when running on Linux. Moli retains its own
+default identity; the collector never replaces it with the host identity.
+
+`result.json` selects the final event API's bot/tampering/score fields and
+an explicit allowlist of device attributes. No API reply within the fixed
+12-second post-navigation window means **no valid verdict**. Identity reads
+happen after that window. Responses are not intercepted or rewritten.
+
+## Evidence handling
+
+Keep `environment.json` and `result.json` with the investigation. Do not
+commit unreviewed raw artifacts: `server.log` can contain URLs and third-party
+script diagnostics. Even selected fingerprints describe a device and should
+not be published indiscriminately. The collectors omit visitor IDs, cookies,
+IP addresses and opaque SDK tokens from their structured reports.
+
+The native Windows guard, result URL selection and structured-report
+allowlists have local unit tests. Actual Windows launch and site results must
+still be verified on Windows; a passing Linux unit test is not that evidence.
diff --git a/moli-cdp-smoke/moli_cdp_smoke/diagnostics/__init__.py b/moli-cdp-smoke/moli_cdp_smoke/diagnostics/__init__.py
new file mode 100644
index 0000000000..e365cf2017
--- /dev/null
+++ b/moli-cdp-smoke/moli_cdp_smoke/diagnostics/__init__.py
@@ -0,0 +1 @@
+"""Opt-in live compatibility investigations; never part of the default smoke suite."""
diff --git a/moli-cdp-smoke/moli_cdp_smoke/diagnostics/browser.py b/moli-cdp-smoke/moli_cdp_smoke/diagnostics/browser.py
new file mode 100644
index 0000000000..e3ecc27436
--- /dev/null
+++ b/moli-cdp-smoke/moli_cdp_smoke/diagnostics/browser.py
@@ -0,0 +1,118 @@
+"""Owned, disposable native-browser CDP sessions for live investigations."""
+from __future__ import annotations
+
+import asyncio
+from contextlib import asynccontextmanager
+from datetime import datetime, timezone
+import hashlib
+import json
+import os
+from pathlib import Path
+import platform
+import socket
+import tempfile
+import urllib.request
+
+from playwright.async_api import async_playwright
+
+from ..process import subprocess_starts_new_session, terminate_process_tree
+
+
+def save(path: Path, value: object) -> None:
+    path.write_text(json.dumps(value, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
+
+
+def require_native_windows(required: bool) -> None:
+    if required and platform.system() != "Windows":
+        raise ValueError("Windows baseline requires this collector and browser to run on Windows; a UA override is not a Windows baseline")
+
+
+def discovery(endpoint: str) -> dict:
+    opener = urllib.request.build_opener(urllib.request.ProxyHandler({}))
+    with opener.open(endpoint + "/json/version", timeout=2) as response:
+        return json.load(response)
+
+
+async def stop_browser(process) -> bool:
+    if os.name == "posix":
+        return await terminate_process_tree(process)
+    # Windows has no SIGKILL/process group API. Browser.close above normally
+    # closes the full browser; the owned root process still has a bounded exit.
+    if process.returncode is not None:
+        return True
+    process.terminate()
+    try:
+        await asyncio.wait_for(process.wait(), 5)
+    except asyncio.TimeoutError:
+        process.kill()
+        await asyncio.wait_for(process.wait(), 2)
+    return True
+
+
+@asynccontextmanager
+async def browser_session(binary: Path, engine: str, output: Path, require_windows: bool = False):
+    require_native_windows(require_windows)
+    binary = binary.resolve(strict=True)
+    output.mkdir(parents=True, exist_ok=False)
+    with socket.socket() as sock:
+        sock.bind(("127.0.0.1", 0))
+        port = sock.getsockname()[1]
+    endpoint = f"http://127.0.0.1:{port}"
+    environment = {k: v for k, v in os.environ.items()
+                   if k.lower() not in {"http_proxy", "https_proxy", "all_proxy", "no_proxy"}}
+    with tempfile.TemporaryDirectory(prefix="moli-native-baseline-") as profile:
+        command = ([str(binary), "serve", "-lr", "--port", str(port)] if engine == "moli" else
+                   [str(binary), f"--remote-debugging-port={port}", "--remote-debugging-address=127.0.0.1",
+                    f"--user-data-dir={profile}", "--no-first-run", "--no-default-browser-check",
+                    "--no-proxy-server", "--password-store=basic", "--window-size=1920,1080", "about:blank"])
+        with binary.open("rb") as source:
+            digest = hashlib.file_digest(source, "sha256").hexdigest()
+        metadata = {"started_at": datetime.now(timezone.utc).isoformat(), "engine": engine,
+                    "host_os": platform.system(), "host_release": platform.release(),
+                    "machine": platform.machine(), "native_windows_required": require_windows,
+                    "binary": str(binary), "binary_sha256": digest,
+                    "identity_override": False, "tls_verification": True, "proxy": "disabled",
+                    "mode": "CDP; Runtime/Page/Network enabled; fresh process and context; no viewport emulation"}
+        if hasattr(os, "getloadavg"):
+            metadata["load_average_before"] = os.getloadavg()
+        with (output / "server.log").open("w", encoding="utf-8") as log:
+            process = await asyncio.create_subprocess_exec(
+                *command, env=environment, stdout=log, stderr=asyncio.subprocess.STDOUT,
+                start_new_session=subprocess_starts_new_session())
+            try:
+                for _ in range(60):
+                    if process.returncode is not None:
+                        raise RuntimeError(f"Browser exited before discovery: {process.returncode}")
+                    try:
+                        version = await asyncio.to_thread(discovery, endpoint)
+                        break
+                    except (OSError, ValueError):
+                        await asyncio.sleep(0.2)
+                else:
+                    raise TimeoutError("CDP discovery did not become ready")
+                metadata["browser"] = {k: version.get(k) for k in ["Browser", "V8-Version", "User-Agent"]}
+                save(output / "environment.json", metadata)
+                async with async_playwright() as pw:
+                    # Discovery already bypassed proxies; use its WebSocket
+                    # directly instead of having the driver repeat the HTTP
+                    # request with the caller's proxy environment.
+                    browser = await pw.chromium.connect_over_cdp(version["webSocketDebuggerUrl"], timeout=15000)
+                    try:
+                        context = await asyncio.wait_for(browser.new_context(no_viewport=True), 15)
+                        page = await asyncio.wait_for(context.new_page(), 15)
+                        cdp = await asyncio.wait_for(context.new_cdp_session(page), 10)
+                        for domain in ["Runtime", "Page", "Network"]:
+                            await asyncio.wait_for(cdp.send(domain + ".enable"), 10)
+                        yield page, cdp
+                    finally:
+                        try:
+                            await asyncio.wait_for(browser.close(), 10)
+                        except Exception as error:
+                            metadata["close_error_type"] = type(error).__name__
+            finally:
+                metadata["process_cleaned_up"] = await stop_browser(process)
+                metadata["finished_at"] = datetime.now(timezone.utc).isoformat()
+                metadata["process_exit"] = process.returncode
+                if hasattr(os, "getloadavg"):
+                    metadata["load_average_after"] = os.getloadavg()
+                save(output / "environment.json", metadata)
diff --git a/moli-cdp-smoke/moli_cdp_smoke/diagnostics/fingerprint_identity.py b/moli-cdp-smoke/moli_cdp_smoke/diagnostics/fingerprint_identity.py
new file mode 100644
index 0000000000..b6b8621c52
--- /dev/null
+++ b/moli-cdp-smoke/moli_cdp_smoke/diagnostics/fingerprint_identity.py
@@ -0,0 +1,104 @@
+"""Compare native FP Pro observations without changing identity or site probes."""
+from __future__ import annotations
+
+import argparse
+import asyncio
+import base64
+import json
+from pathlib import Path
+import time
+from urllib.parse import urlsplit
+
+from .browser import browser_session, save
+
+URL = "https://demo.fingerprint.com/playground"
+ATTRIBUTE_KEYS = ("fonts", "font_preferences", "touch_support", "platform", "vendor", "languages",
+                  "screen_resolution", "color_depth", "hardware_concurrency", "device_memory",
+                  "timezone", "os_cpu", "architecture", "audio", "math", "webgl_basics")
+IDENTITY = """async () => ({
+    userAgent: navigator.userAgent, platform: navigator.platform, languages: navigator.languages,
+    webdriver: navigator.webdriver, hardwareConcurrency: navigator.hardwareConcurrency,
+    deviceMemory: navigator.deviceMemory,
+    metadata: navigator.userAgentData ? await navigator.userAgentData.getHighEntropyValues([
+      'platformVersion','architecture','bitness','fullVersionList','wow64']) : null
+})"""
+
+
+def select_result(value: dict) -> dict:
+    # No visitor/request IDs, IPs, request bodies, cookies or opaque SDK tokens.
+    result = {key: value[key] for key in ["bot", "tampering", "suspect_score", "tampering_ml_score"]
+              if key in value}
+    raw = value.get("raw_device_attributes", {})
+    result["attributes"] = {key: raw[key] for key in ATTRIBUTE_KEYS if key in raw}
+    return result
+
+
+def is_result_url(url: str) -> bool:
+    parsed = urlsplit(url)
+    return parsed.hostname == "demo.fingerprint.com" and parsed.path.startswith("/api/event/")
+
+
+async def capture(args) -> dict:
+    result = {"url": URL, "wait_seconds": args.wait_seconds, "responses": [],
+              "errors": [], "valid_verdict": False}
+    try:
+        async with browser_session(args.binary, args.engine, args.output, args.require_windows) as (page, cdp):
+            started = time.monotonic()
+            responses = []
+
+            def received(params):
+                response = params.get("response", {})
+                if is_result_url(response.get("url", "")):
+                    responses.append({"requestId": params["requestId"], "status": response["status"],
+                                      "elapsed": time.monotonic() - started})
+
+            cdp.on("Network.responseReceived", received)
+            try:
+                await page.goto(URL, wait_until="domcontentloaded", timeout=45000)
+            except Exception as error:
+                result["errors"].append({"phase": "navigation", "error_type": type(error).__name__})
+            await asyncio.sleep(args.wait_seconds)
+            cutoff = time.monotonic() - started
+            result["observation_cutoff"] = cutoff
+            for response in list(responses):
+                if response["elapsed"] > cutoff:
+                    continue
+                observation = {"status": response["status"], "elapsed": response["elapsed"]}
+                try:
+                    body = await asyncio.wait_for(cdp.send("Network.getResponseBody", {"requestId": response["requestId"]}), 5)
+                    if body.get("base64Encoded"):
+                        value = json.loads(base64.b64decode(body["body"]))
+                    else:
+                        value = json.loads(body["body"])
+                    observation["result"] = select_result(value)
+                except Exception as error:
+                    observation["error_type"] = type(error).__name__
+                result["responses"].append(observation)
+            # This post-verdict read does not override or instrument any probe.
+            result["identity"] = await asyncio.wait_for(page.evaluate(IDENTITY), 10)
+            result["valid_verdict"] = any(isinstance(r.get("result", {}).get("tampering"), bool)
+                                          for r in result["responses"])
+    finally:
+        if args.output.exists():
+            save(args.output / "result.json", result)
+    return result
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--binary", type=Path, required=True)
+    parser.add_argument("--engine", choices=["chromium", "moli"], required=True)
+    parser.add_argument("--output", type=Path, required=True)
+    parser.add_argument("--require-windows", action="store_true", help="Reject a Linux/macOS runner even if its UA claims Windows")
+    parser.add_argument("--wait-seconds", type=int, default=12)
+    args = parser.parse_args()
+    if args.wait_seconds < 1 or args.wait_seconds > 120:
+        parser.error("wait-seconds must be between 1 and 120")
+    if args.output.exists():
+        parser.error("output must be a new directory")
+    result = asyncio.run(capture(args))
+    print(json.dumps({"valid_verdict": result["valid_verdict"], "responses": result["responses"]}))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/moli-cdp-smoke/tests/test_fingerprint_identity_diagnostic.py b/moli-cdp-smoke/tests/test_fingerprint_identity_diagnostic.py
new file mode 100644
index 0000000000..5240be3233
--- /dev/null
+++ b/moli-cdp-smoke/tests/test_fingerprint_identity_diagnostic.py
@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+import unittest
+from unittest.mock import patch
+
+from moli_cdp_smoke.diagnostics.browser import require_native_windows
+from moli_cdp_smoke.diagnostics.fingerprint_identity import is_result_url, select_result
+
+
+class FingerprintIdentityDiagnosticTests(unittest.TestCase):
+    def test_windows_baseline_rejects_non_windows_hosts(self):
+        for system in ["Linux", "Darwin"]:
+            with self.subTest(system=system), patch("platform.system", return_value=system):
+                with self.assertRaisesRegex(ValueError, "not a Windows baseline"):
+                    require_native_windows(True)
+                require_native_windows(False)
+        with patch("platform.system", return_value="Windows"):
+            require_native_windows(True)
+
+    def test_result_url_requires_the_demo_host_and_event_api(self):
+        self.assertTrue(is_result_url("https://demo.fingerprint.com/api/event/opaque"))
+        self.assertFalse(is_result_url("https://demo.fingerprint.com/playground"))
+        self.assertFalse(is_result_url("https://example.com/api/event/opaque"))
+
+    def test_result_snapshot_omits_identifiers_and_unselected_raw_attributes(self):
+        value = {"tampering": True, "suspect_score": 22, "visitor_id": "secret",
+                 "request_id": "secret", "ip_address": "secret",
+                 "raw_device_attributes": {"fonts": {"value": ["Arial"]},
+                                           "cookies": "secret", "ip": "secret"}}
+        self.assertEqual(select_result(value), {
+            "tampering": True, "suspect_score": 22,
+            "attributes": {"fonts": {"value": ["Arial"]}},
+        })
+
+
+if __name__ == "__main__":
+    unittest.main()