browser: click-path allowlist, safe tenant script upgrade, allowlist activation plan

- click/click_ref: pre-click allowlist gate on resolvable anchor href
  (same check as navigate; miss refuses before the click executes);
  click/click_ref/click_at: post-click landing URL check.
  click_at has no pre-click gate by design (coordinates name no
  element); JS-driven navigation, evaluate, meta refresh and popups
  are documented as unintercepable with the Tinyproxy 403 backstop.
- Tenant script upgrade is now safe: only proven-unmodified scripts
  (manifest match, 2a569ac known-shipped SHA-256, missing, or
  current) auto-merge; tenant-modified scripts are never overwritten,
  are reported as skipped, and get one deduped audit record. The
  manifest never learns a tenant hash (else the next upgrade would
  mistake a modified file for untouched). Idempotent reruns.
- Activation candidate = deployed Tinyproxy programming set encoded
  with leading-dot entries (plain entries would regress
  docs.python.org); npmjs.org per the deployed filter, not npmjs.com.
  Host activation itself is NOT performed this round: only the plan,
  validation tests and rollback are delivered.
Tests: 28 new (click 13, upgrade 8, activation 7), all fake/no-network;
98 browser-related tests pass including prior suites.

(cherry picked from commit e4a93f5748ec815f163d0bc096ff4dc4b8c651f5)

cloud/playwright_browser.py

@@ -103,6 +103,23 @@ def _check_allowed_url(url):
         "domain" % (host, ", ".join(allowed)))
 
 
+def _check_navigated_url(url):
+    """Post-navigation / click-target check: same allowlist as
+    _check_allowed_url, but only for http(s) URLs. Anything else
+    is not a page navigation (file:// is always allowed anyway,
+    about:blank / data: / mailto: / javascript: never navigate
+    the page to a host), so it is skipped here instead of
+    raising a misleading non-http(s) error. Unset allowlist
+    means no check at all, same as _check_allowed_url."""
+    if _allowed_hosts() is None:
+        return
+    from urllib.parse import urlparse
+    scheme = (urlparse(str(url)).scheme or "").lower()
+    if scheme not in ("http", "https"):
+        return
+    _check_allowed_url(url)
+
+
 class Browser:
     """Chromium pages (multi-tab). ``browser_factory`` is
     injectable: tests pass a fake returning a fake
@@ -361,15 +378,84 @@ class Browser:
         result["truncated"] = truncated
         return result
 
+    def _click_href(self, selector):
+        """Best-effort anchor href for a click target, or None.
+
+        Reads the first matching element's href (the same element
+        page.click would click). Returns the href resolved
+        against the current page URL, or None when the target has
+        no href, is not an anchor, or the locator API cannot
+        answer (fake pages, non-anchor selectors). A None here
+        does NOT mean allowed: it means the target is unknown
+        before the click, so only the post-click URL check can
+        catch it. Fragment-only hrefs resolve to the current
+        page and are returned as None for the same reason: they
+        never navigate to another host."""
+        try:
+            locator = self._page.locator(str(selector))
+        except Exception:  # noqa: BLE001 - unknown target
+            return None
+        target = getattr(locator, "first", locator)
+        get_attr = getattr(target, "get_attribute", None)
+        if get_attr is None:
+            return None
+        try:
+            href = get_attr("href")
+        except Exception:  # noqa: BLE001 - unknown target
+            return None
+        if not href or not isinstance(href, str):
+            return None
+        href = href.strip()
+        if not href or href.startswith("#"):
+            return None
+        from urllib.parse import urljoin
+        try:
+            return urljoin(self._current_url or "", href)
+        except Exception:  # noqa: BLE001 - unknown target
+            return None
+
+    def _check_click_target(self, selector):
+        """Pre-click allowlist gate for click/click_ref.
+
+        When the allowlist is unset this is a no-op, so click
+        behaviour is byte-identical to before. When set and the
+        target href resolves to an http(s) URL, the same check
+        as navigate runs BEFORE the click: a miss raises and
+        the click is never executed. Unknown targets (no href,
+        button/JS handler) skip this gate and are caught, if at
+        all, by _check_navigated_current after the click."""
+        if _allowed_hosts() is None:
+            return
+        target = self._click_href(selector)
+        if target is not None:
+            _check_navigated_url(target)
+
+    def _check_navigated_current(self):
+        """Post-click allowlist detection (not prevention).
+
+        The click already happened, so this can only report a
+        blocked landing host, never undo the navigation. It
+        exists because some click targets cannot be resolved
+        before the click (coordinates, JS handlers, forms): for
+        those, a raised error here is still better than silently
+        continuing on a blocked host, and the egress proxy 403
+        is the layer that actually stops the page load when the
+        allowlist equals the proxy whitelist."""
+        if _allowed_hosts() is None or not self._current_url:
+            return
+        _check_navigated_url(self._current_url)
+
     def click(self, selector):
         if not selector or not str(selector).strip():
             raise BrowserError("selector is required")
         self._ensure()
+        self._check_click_target(selector)
         try:
             self._page.click(str(selector), timeout=10000)
             self._current_url = self._page.url
         except Exception as exc:  # noqa: BLE001
             raise BrowserError("click failed: %s" % exc)
+        self._check_navigated_current()
         result = self._info()
         result["ok"] = True
         return result
@@ -499,11 +585,16 @@ class Browser:
                 "unknown ref %r: run browser_snapshot_refs first" % (ref,))
         self._ensure()
         path = self._ref_paths[ref]
+        # The ref path is a CSS path, so the same href gate as
+        # click applies: an anchor ref to a blocked host is
+        # refused before the click, never executed.
+        self._check_click_target(path)
         try:
             self._page.locator(path).first.click(timeout=10000)
             self._current_url = self._page.url
         except Exception as exc:  # noqa: BLE001
             raise BrowserError("click_ref failed: %s" % exc)
+        self._check_navigated_current()
         result = self._info()
         result["ok"] = True
         result["ref"] = ref
@@ -619,11 +710,21 @@ class Browser:
             raise BrowserError(
                 "click_at out of viewport 1280x800: %s,%s" % (x, y))
         self._ensure()
+        # Deliberately NO pre-click gate here: coordinates do not
+        # identify an element, so there is no href to check
+        # before the click. Probing elementFromPoint would be
+        # viewport/scroll-dependent, would miss JS-driven
+        # navigations (the common click_at case: buttons, canvas,
+        # SPA controls), and would run page JS on every user
+        # click. What click_at does get is the post-click URL
+        # check below, plus the egress proxy 403 backstop for
+        # any host outside the proxy whitelist.
         try:
             self._page.mouse.click(fx, fy)
             self._current_url = self._page.url
         except Exception as exc:  # noqa: BLE001
             raise BrowserError("click_at failed: %s" % exc)
+        self._check_navigated_current()
         result = self._info()
         result["ok"] = True
         result["x"] = fx
@@ -725,49 +826,183 @@ class Browser:
 
 # ------------------------------------------------------- codex-home glue
 
+PLAYWRIGHT_SCRIPT_NAMES = ("playwright_browser.py", "playwright_mcp.py",
+                           "playwright_remote.py")
+
+# SHA-256 of the three MCP scripts as shipped at origin/main
+# 2a569ac (PR #272), verified against the git blobs. A tenant
+# script matching one of these hashes is PROVEN unmodified
+# (it is exactly what a previous seeding wrote), so the safe
+# upgrade below may replace it even when no manifest exists
+# (legacy tenants seeded before manifests were written).
+# A tenant script matching neither a manifest entry nor a hash
+# here is treated as tenant-modified and is NEVER overwritten.
+KNOWN_SHIPPED_SCRIPT_HASHES = {
+    "playwright_browser.py":
+        "0c36a286da3f8733fef4fec2dd18dec003fa68f54385fd4dc8da4b38e7571828",
+    "playwright_mcp.py":
+        "8455e67c2eb2ec6eb07bc9645292e2323b587e01d5a75fd8a985bbcd04a11198",
+    "playwright_remote.py":
+        "15a8026a02dfed6c630ea1614f75d54764a851df9d977c2380e15d0ed4f8a173",
+}
+
+_MANIFEST_NAME = "playwright_scripts_manifest.json"
+_AUDIT_NAME = "playwright_scripts_audit.jsonl"
+
+
+def _sha256_bytes(data):
+    import hashlib
+    return hashlib.sha256(data).hexdigest()
+
+
+def _read_script_manifest(home):
+    """name -> sha256 last written by seeding, or {}.
+
+    The manifest is this helper's own metadata file in the
+    tenant codex-home (not tenant data): it records what the
+    last seeding wrote, so a later upgrade can tell an
+    untouched script from a tenant-modified one. Missing or
+    corrupt manifests read as empty -- the caller then falls
+    back to KNOWN_SHIPPED_SCRIPT_HASHES, never to overwriting
+    an unknown file."""
+    try:
+        with open(os.path.join(home, _MANIFEST_NAME),
+                  encoding="utf-8") as fh:
+            data = json.load(fh)
+    except Exception:  # noqa: BLE001 - missing/corrupt = no proof
+        return {}
+    if not isinstance(data, dict):
+        return {}
+    return {k: v for k, v in data.items()
+            if isinstance(k, str) and isinstance(v, str)}
+
+
+def _write_script_manifest(home, hashes):
+    """Best-effort manifest write; failures never block seeding."""
+    try:
+        with open(os.path.join(home, _MANIFEST_NAME), "w",
+                  encoding="utf-8") as fh:
+            json.dump({k: hashes[k] for k in sorted(hashes)},
+                      fh, ensure_ascii=False, sort_keys=True)
+            fh.write("\n")
+    except OSError:
+        pass
+
+
+def _audit_script_skipped(home, name, dst_hash, src_hash):
+    """Append one audit record for a skipped modified script.
+
+    Idempotent: a record with the same script + tenant hash is
+    never appended twice, so re-running an upgrade does not
+    grow the log. The audit file is append-only metadata; the
+    skipped script itself is left byte-identical."""
+    path = os.path.join(home, _AUDIT_NAME)
+    try:
+        with open(path, encoding="utf-8") as fh:
+            for line in fh:
+                try:
+                    rec = json.loads(line)
+                except ValueError:
+                    continue
+                if (isinstance(rec, dict)
+                        and rec.get("script") == name
+                        and rec.get("dst_sha256") == dst_hash
+                        and rec.get("action") == "skipped_modified"):
+                    return path
+    except OSError:
+        pass
+    record = {"ts": int(time.time()),
+              "action": "skipped_modified",
+              "script": name,
+              "dst_sha256": dst_hash,
+              "src_sha256": src_hash,
+              "note": "tenant-modified script left untouched; "
+                      "manual review required before upgrade"}
+    try:
+        with open(path, "a", encoding="utf-8") as fh:
+            fh.write(json.dumps(record, ensure_ascii=False) + "\n")
+    except OSError:
+        pass
+    return path
+
+
 def ensure_codex_home_playwright(codex_home_dir, command_args=None,
                                  script_dir=None):
     """Seed playwright MCP files + config into a tenant codex-home.
 
-    MCP scripts are SYSTEM files, not tenant data: a tenant never
-    edits them (user files live in the worktree, not codex-home),
-    so unlike the old never-overwrite rule, a differing script is
-    REFRESHED to the deployed version and reported in
-    ``script_refreshed``. Without this, every MCP feature ships
-    dead for existing projects: they keep the first-seeded script
-    forever and only brand-new projects get the update.
-    Appends ``[mcp_servers.playwright]`` only when absent. No
-    secrets live here -- proxy vars arrive via
-    ``ensure_playwright_mcp_env`` from worker proxy_env, and the
-    browsers path is a fixed image path.
+    SAFE UPGRADE RULE (changed from the old refresh-anything
+    rule): a tenant script is auto-merged to the deployed
+    version ONLY when it is proven unmodified -- its bytes
+    match the seeding manifest, or match a
+    KNOWN_SHIPPED_SCRIPT_HASHES entry (legacy tenants), or
+    the file is missing (fresh seed) or already current. A
+    script that differs AND matches neither proof is
+    tenant-modified: it is NEVER overwritten, it is reported
+    in ``script_skipped_modified`` (alias ``script_differs``),
+    and one deduped audit record is appended to
+    ``playwright_scripts_audit.jsonl`` for manual review.
+    The upgrade never deletes a tenant file and never rewrites
+    existing config semantics: ``[mcp_servers.playwright]``
+    is appended only when absent, and the manifest/audit files
+    are this helper's own additive metadata. No secrets live
+    here -- proxy vars arrive via ``ensure_playwright_mcp_env``
+    from worker proxy_env, and the browsers path is a fixed
+    image path.
     """
     import shutil
 
     home = os.path.abspath(codex_home_dir)
     os.makedirs(home, exist_ok=True)
     here = os.path.abspath(script_dir or os.path.dirname(__file__))
+    manifest = _read_script_manifest(home)
     script_changed = False
     script_differs = []
     script_refreshed = []
-    for name in ("playwright_browser.py", "playwright_mcp.py",
-                 "playwright_remote.py"):
+    script_skipped = []
+    audit_path = os.path.join(home, _AUDIT_NAME)
+    new_hashes = {}
+    for name in PLAYWRIGHT_SCRIPT_NAMES:
         src = os.path.join(here, name)
         dst = os.path.join(home, name)
         if not os.path.exists(src):
             continue
+        with open(src, "rb") as fh:
+            src_bytes = fh.read()
+        src_hash = _sha256_bytes(src_bytes)
         if not os.path.exists(dst):
             shutil.copyfile(src, dst)
             script_changed = True
+            new_hashes[name] = src_hash
+            continue
+        with open(dst, "rb") as fh:
+            dst_bytes = fh.read()
+        dst_hash = _sha256_bytes(dst_bytes)
+        if dst_bytes == src_bytes:
+            new_hashes[name] = src_hash
+            continue
+        proven_unmodified = (
+            manifest.get(name) == dst_hash
+            or KNOWN_SHIPPED_SCRIPT_HASHES.get(name) == dst_hash)
+        if proven_unmodified:
+            shutil.copyfile(src, dst)
+            script_refreshed.append(name)
+            script_changed = True
+            new_hashes[name] = src_hash
         else:
-            with open(src, "rb") as fh:
-                src_bytes = fh.read()
-            with open(dst, "rb") as fh:
-                dst_bytes = fh.read()
-            if src_bytes != dst_bytes:
-                shutil.copyfile(src, dst)
-                script_refreshed.append(name)
-                script_changed = True
-                continue
+            script_differs.append(name)
+            script_skipped.append(name)
+            _audit_script_skipped(home, name, dst_hash, src_hash)
+            # NEVER record the tenant-modified hash as proven:
+            # writing dst_hash into the manifest would make the
+            # NEXT upgrade mistake this modified file for an
+            # untouched one and overwrite it. Keep any older
+            # proof entry (so a revert to that version can still
+            # auto-merge later); otherwise drop the entry, which
+            # fails closed to skip again.
+            if name in manifest:
+                new_hashes[name] = manifest[name]
+    if new_hashes:
+        _write_script_manifest(home, new_hashes)
     config_path = os.path.join(home, "config.toml")
     if command_args is None:
         command_args = ["python3",
@@ -793,7 +1028,9 @@ def ensure_codex_home_playwright(codex_home_dir, command_args=None,
             "config_changed": config_changed,
             "script_changed": script_changed,
             "script_differs": script_differs,
-            "script_refreshed": script_refreshed}
+            "script_refreshed": script_refreshed,
+            "script_skipped_modified": script_skipped,
+            "audit_path": audit_path}
 
 
 def ensure_playwright_mcp_env(codex_home_dir, env):

cloud/playwright_mcp.py

@@ -72,7 +72,12 @@ _TOOLS = [
         "description": (
             "Click an element by CSS selector or Playwright "
             "selector (e.g. 'button.submit', 'text=Next'). "
-            "Then snapshot to see the result."
+            "Then snapshot to see the result. When "
+            "BROWSER_ALLOWED_HOSTS is set, an anchor click to "
+            "a non-listed host is refused BEFORE the click; a "
+            "click whose target cannot be resolved beforehand "
+            "(button, JS handler) is reported after it lands "
+            "on a blocked host instead."
         ),
         "inputSchema": {
             "type": "object",
@@ -120,7 +125,11 @@ _TOOLS = [
             "top-left of the 1280x800 viewport). This is the tool "
             "a live viewer drives: the user clicks on a screenshot "
             "and the coordinates arrive here. Then snapshot to see "
-            "the result."
+            "the result. Coordinates identify no element, so "
+            "there is no pre-click allowlist gate here: when "
+            "BROWSER_ALLOWED_HOSTS is set, a landing on a "
+            "blocked host is reported after the click, and the "
+            "egress proxy 403 is the backstop that stops the load."
         ),
         "inputSchema": {
             "type": "object",
@@ -165,7 +174,10 @@ _TOOLS = [
         "name": "browser_click_ref",
         "description": (
             "Click an element by its ref from browser_snapshot_refs. "
-            "More robust than a CSS selector across re-renders."
+            "More robust than a CSS selector across re-renders. "
+            "Same allowlist rule as browser_click: an anchor ref "
+            "to a non-listed host is refused before the click "
+            "when BROWSER_ALLOWED_HOSTS is set."
         ),
         "inputSchema": {
             "type": "object",

cloud/skills/browser-automation/SKILL.md

@@ -82,9 +82,36 @@ navigate / snapshot / click / fill / screenshot 都针对该页；
 就检查：`file://` 一律放行，`http(s)` 的 host 必须命中列表
 （前导点条目做后缀匹配：`.python.org` 同时放行
 `python.org` 与 `docs.python.org`，不放行
-`notpython.org`），大小写与端口不影响匹配，未命中直接
-报错且不启动 Chromium。`localhost` / `127.0.0.1` 没有
-特殊待遇：本地开发服务器要自己把它列进变量，否则会被挡。
+`notpython.org`；注意：不带前导点的 `python.org` 只精确
+匹配自身，不放行 `docs.python.org`），大小写与端口不影响
+匹配，未命中直接报错且不启动 Chromium。`localhost` /
+`127.0.0.1` 没有特殊待遇：本地开发服务器要自己把它列进
+变量，否则会被挡。
+
+页内点击白名单（本轮补齐，与 navigate 同款检查）：
+`browser_click` / `browser_click_ref` 点到带 href 的链接时，
+先解析 href（相对链接按当前页 URL 展开）再检查：未命中
+直接报错、点击根本不执行；点到没有 href 的目标（按钮、
+JS 处理函数）时事前无从得知目的地，只能在点击后检查落点
+URL、命中 blocked host 时报错（此时点击已发生，只是事后
+发现，不是事前拦截）。`browser_click_at` 是坐标点击，坐标
+本身对应不了任何元素，所以没有事前检查，只有事后落点检查。
+真正拦不住的路径（不要假装已拦）：页内 JS 自行跳转
+（`location.href`、表单提交、SPA 路由、回车提交）、
+`browser_evaluate` 里跑的任意 JS、meta refresh、弹窗新页。
+这些路径没有“点击前已知目的地”可供检查，只能靠 egress
+代理 403 兜底——白名单与代理白名单取同一域名集合时，被挡
+域名在代理层就加载失败，不会真的打开目标页；但 evaluate
+与 shell 同权，白名单从来不是它的沙箱边界，不要把它当
+成防绕过手段。
+
+老租户脚本升级（本轮改动）：播种器只对已证明未改动的
+租户脚本自动合并新版（播种 manifest 命中，或命中
+2a569ac 已发布版本的哈希，或文件缺失/已是最新）；租户
+改过的脚本绝不覆盖，原样不动、记一条审计
+（租户 codex-home 里的 `playwright_scripts_audit.jsonl`），
+留待人工处理——下次任务播种时它仍会被跳过，不会悄悄
+被新版盖掉。
 
 清理：`browser_close` 会关掉全部页，并尽力删除工作区里的
 `browser-live.png` 与 `browser-live.json`（删不掉也不报错），

cloud/tests/test_playwright_activation.py

@@ -0,0 +1,209 @@
+"""BROWSER_ALLOWED_HOSTS activation-candidate validation.
+
+The candidate value is the ALREADY-DEPLOYED Tinyproxy
+programming-domain set (deploy/egress/tinyproxy-filter) plus the
+already-present github.com / pypi.org / npmjs.org -- no invented
+domains. NOTE: the task text said "npmjs.com", but the deployed
+filter (tinyproxy-filter line 23, new-host-checklist.md, and
+docs/platform-browser.md) all say npmjs.org, so the candidate
+follows the DEPLOYED set (npmjs.org); npmjs.com is deliberately
+NOT in the candidate -- adding it would widen the allowlist
+beyond the proxy, breaking allowlist==proxy parity. If the npm
+website itself must be browsable, that is a separate filter
+change for the parent to decide, not something this round
+invents. Because the Tinyproxy lines are subdomain-inclusive
+(``^\\(.*\\.\\)*domain$``), the env value uses leading-dot
+entries, which are the allowlist encoding of the same
+subdomain-inclusive set; plain entries would NOT match
+subdomains (proven by test_plain_entries_would_break_subdomains)
+and would therefore regress docs.python.org etc.
+
+All checks run against fake browsers / the filter file itself:
+no production tenant, no network, no real credentials.
+"""
+
+import os
+import re
+import sys
+import tempfile
+import unittest
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
+
+from playwright_browser import Browser, BrowserError  # noqa: E402
+from playwright_browser import _check_allowed_url  # noqa: E402
+
+# The activation candidate: the deployed Tinyproxy programming
+# set, encoded subdomain-inclusively. Domain SET is fixed by the
+# task (no new domains); only the encoding (dot prefix) follows
+# from the filter's own subdomain rule.
+CANDIDATE_DOMAINS = [
+    "python.org", "nodejs.org", "go.dev", "pkg.go.dev",
+    "rust-lang.org", "developer.mozilla.org", "crates.io",
+    "stackoverflow.com", "cve.mitre.org", "nvd.nist.gov",
+    "github.com", "pypi.org", "npmjs.org",
+]
+CANDIDATE = ",".join("." + d for d in CANDIDATE_DOMAINS)
+
+REPO_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__),
+                                         "..", ".."))
+FILTER_PATH = os.path.join(REPO_ROOT, "deploy", "egress",
+                           "tinyproxy-filter")
+
+
+class _FakePage:
+    def __init__(self):
+        self.url = ""
+        self.calls = []
+        self.mouse = self
+
+    def title(self):
+        return "T"
+
+    def goto(self, url, timeout=None, wait_until=None):
+        self.calls.append(("goto", url))
+        self.url = url
+
+    def locator(self, selector):
+        raise AssertionError("no locator use in activation tests")
+
+    def click(self, selector, timeout=None):
+        self.calls.append(("click", selector))
+
+    def close(self):
+        pass
+
+
+class _FakeHandle:
+    def __init__(self, page):
+        self._page = page
+
+    def new_page(self, viewport=None):
+        return self._page
+
+    def close(self):
+        pass
+
+
+class _FakePW:
+    def __init__(self, page):
+        self._page = page
+        self.launch_count = 0
+
+    def start(self):
+        return self
+
+    @property
+    def chromium(self):
+        outer = self
+
+        class _Chromium:
+            def launch(self, **kwargs):
+                outer.launch_count += 1
+                return _FakeHandle(outer._page)
+
+        return _Chromium()
+
+    def stop(self):
+        pass
+
+
+class _EnvGuard:
+    def setUp(self):
+        self._old = os.environ.get("BROWSER_ALLOWED_HOSTS")
+
+    def tearDown(self):
+        if self._old is None:
+            os.environ.pop("BROWSER_ALLOWED_HOSTS", None)
+        else:
+            os.environ["BROWSER_ALLOWED_HOSTS"] = self._old
+
+
+def _filter_domains():
+    """Domains covered by subdomain-inclusive filter lines."""
+    with open(FILTER_PATH, encoding="utf-8") as fh:
+        lines = fh.read().splitlines()
+    out = set()
+    for line in lines:
+        m = re.match(r"^\^\\\(\.\*\\.\\\)\*(.+)\$$", line)
+        if m:
+            out.add(m.group(1).replace("\\.", "."))
+    return out
+
+
+class ActivationCandidateTest(_EnvGuard, unittest.TestCase):
+    def setUp(self):
+        _EnvGuard.setUp(self)
+        os.environ["BROWSER_ALLOWED_HOSTS"] = CANDIDATE
+        self._tmp = tempfile.TemporaryDirectory()
+        self.page = _FakePage()
+        self.factory = _FakePW(self.page)
+        self.browser = Browser(cwd=self._tmp.name,
+                               proxy="http://proxy:8888",
+                               browser_factory=lambda: self.factory)
+
+    def tearDown(self):
+        self._tmp.cleanup()
+        _EnvGuard.tearDown(self)
+
+    def test_candidate_matches_deployed_filter_set(self):
+        # Every candidate domain has a subdomain-inclusive line
+        # in the deployed filter; the candidate invents nothing.
+        filt = _filter_domains()
+        for domain in CANDIDATE_DOMAINS:
+            self.assertIn(domain, filt, domain)
+
+    def test_candidate_allows_bare_and_subdomains(self):
+        for domain in CANDIDATE_DOMAINS:
+            _check_allowed_url("https://%s/" % domain)
+            _check_allowed_url("https://www.%s/docs" % domain)
+        # The cases the filter explicitly exists for.
+        _check_allowed_url("https://docs.python.org/3/")
+        _check_allowed_url("https://docs.rust-lang.org/")
+        _check_allowed_url("https://api.github.com/")
+        _check_allowed_url("https://pypi.org/project/x/")
+
+    def test_candidate_blocks_suffix_tricks_and_outsiders(self):
+        for bad in ("https://notpython.org/",
+                    "https://python.org.evil.com/",
+                    "https://evilgithub.com/",
+                    "https://api.diante.me/",
+                    "https://www.amazon.com/",
+                    "https://mail.google.com/"):
+            with self.assertRaises(BrowserError, msg=bad):
+                _check_allowed_url(bad)
+
+    def test_plain_entries_would_break_subdomains(self):
+        # Why the candidate uses dot forms: plain "python.org"
+        # does not match docs.python.org under the established
+        # navigate semantics, so a plain-entry activation would
+        # regress exactly the docs the filter was added for.
+        os.environ["BROWSER_ALLOWED_HOSTS"] = (
+            "python.org,nodejs.org,go.dev,pkg.go.dev,rust-lang.org,"
+            "developer.mozilla.org,crates.io,stackoverflow.com,"
+            "cve.mitre.org,nvd.nist.gov,github.com,pypi.org,npmjs.org")
+        with self.assertRaises(BrowserError):
+            _check_allowed_url("https://docs.python.org/3/")
+
+    def test_file_allowed_localhost_blocked_under_candidate(self):
+        out = self.browser.navigate("file:///tmp/page.html")
+        self.assertTrue(out["ok"])
+        with self.assertRaises(BrowserError):
+            self.browser.navigate("http://localhost:8000/")
+        # localhost blocking is a behaviour CHANGE vs unset:
+        # local dev servers need an explicit localhost entry.
+        self.assertEqual(self.factory.launch_count, 1)
+
+    def test_task_level_navigate_allow_and_block(self):
+        out = self.browser.navigate("https://docs.python.org/3/")
+        self.assertTrue(out["ok"])
+        launches = self.factory.launch_count
+        with self.assertRaises(BrowserError):
+            self.browser.navigate("https://evil.com/")
+        self.assertEqual(self.factory.launch_count, launches)
+
+    def test_unset_means_no_change(self):
+        os.environ.pop("BROWSER_ALLOWED_HOSTS", None)
+        out = self.browser.navigate("https://anything.example/")
+        self.assertTrue(out["ok"])
+        _check_allowed_url("https://anything.example/")

cloud/tests/test_playwright_allowlist_click.py

@@ -0,0 +1,309 @@
+"""Click-path allowlist tests for the Playwright browser (fake only).
+
+Covers the continuation of the navigate-only allowlist: click /
+click_ref get the SAME check before the click when the target
+anchor href is resolvable, and all three click paths get a
+post-click URL check. click_at has no pre-click gate by design
+(coordinates identify no element). No real Chromium, no network,
+no real credentials -- values here are test placeholders.
+"""
+
+import os
+import sys
+import tempfile
+import unittest
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
+
+from playwright_browser import Browser, BrowserError  # noqa: E402
+from playwright_browser import _check_navigated_url  # noqa: E402
+
+
+class _FakeLocator:
+    def __init__(self, page, href):
+        self._page = page
+        self._href = href
+
+    @property
+    def first(self):
+        return self
+
+    def click(self, timeout=None):
+        self._page.calls.append(("locator_click",))
+        if self._page.click_landing is not None:
+            self._page.url = self._page.click_landing
+
+    def get_attribute(self, name):
+        if name == "href":
+            return self._href
+        return None
+
+    def inner_text(self, timeout=None):
+        return "text"
+
+
+class _FakeMouse:
+    def __init__(self, page):
+        self._page = page
+
+    def click(self, x, y):
+        self._page.calls.append(("mouse_click", x, y))
+        if self._page.click_landing is not None:
+            self._page.url = self._page.click_landing
+
+    def move(self, x, y):
+        self._page.calls.append(("mouse_move", x, y))
+
+
+class _FakePage:
+    def __init__(self):
+        self.url = "https://example.com/"
+        self.calls = []
+        self.href_map = {}
+        self.click_landing = None
+        self.mouse = _FakeMouse(self)
+
+    def title(self):
+        return "Example"
+
+    def goto(self, url, timeout=None, wait_until=None):
+        self.calls.append(("goto", url))
+        self.url = url
+
+    def locator(self, selector):
+        self.calls.append(("locator", selector))
+        return _FakeLocator(self, self.href_map.get(selector))
+
+    def click(self, selector, timeout=None):
+        self.calls.append(("click", selector))
+        if self.click_landing is not None:
+            self.url = self.click_landing
+
+    def fill(self, selector, text, timeout=None):
+        self.calls.append(("fill", selector, text))
+
+    def evaluate(self, expression):
+        self.calls.append(("evaluate", expression))
+        return None
+
+    def screenshot(self, path=None):
+        with open(path, "wb") as fh:
+            fh.write(b"\x89PNG\r\n\x1a\n" + b"\x00" * 10)
+
+    def close(self):
+        pass
+
+
+class _FakeHandle:
+    def __init__(self, page):
+        self._page = page
+
+    def new_page(self, viewport=None):
+        return self._page
+
+    def close(self):
+        pass
+
+
+class _FakePW:
+    def __init__(self, page):
+        self._page = page
+        self.launch_count = 0
+
+    def start(self):
+        return self
+
+    @property
+    def chromium(self):
+        outer = self
+
+        class _Chromium:
+            def launch(self, **kwargs):
+                outer.launch_count += 1
+                return _FakeHandle(outer._page)
+
+        return _Chromium()
+
+    def stop(self):
+        pass
+
+
+class _EnvGuard:
+    def setUp(self):
+        self._old = os.environ.get("BROWSER_ALLOWED_HOSTS")
+
+    def tearDown(self):
+        if self._old is None:
+            os.environ.pop("BROWSER_ALLOWED_HOSTS", None)
+        else:
+            os.environ["BROWSER_ALLOWED_HOSTS"] = self._old
+
+
+class ClickAllowlistTest(_EnvGuard, unittest.TestCase):
+    def setUp(self):
+        _EnvGuard.setUp(self)
+        self._tmp = tempfile.TemporaryDirectory()
+        self.page = _FakePage()
+        self.factory = _FakePW(self.page)
+        self.browser = Browser(cwd=self._tmp.name,
+                               proxy="http://proxy:8888",
+                               browser_factory=lambda: self.factory)
+
+    def tearDown(self):
+        self._tmp.cleanup()
+        _EnvGuard.tearDown(self)
+
+    def _start(self, url="https://example.com/"):
+        return self.browser.navigate(url)
+
+    def test_click_allowed_href_executes(self):
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "example.com, .python.org"
+        self._start()
+        self.page.href_map["a.docs"] = "https://docs.python.org/3/"
+        self.page.click_landing = "https://docs.python.org/3/"
+        out = self.browser.click("a.docs")
+        self.assertTrue(out["ok"])
+        self.assertIn(("click", "a.docs"), self.page.calls)
+        self.assertEqual(out["url"], "https://docs.python.org/3/")
+
+    def test_click_blocked_href_refused_before_click(self):
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "example.com"
+        self._start()
+        self.page.href_map["a.evil"] = "https://evil.com/x"
+        self.page.click_landing = "https://evil.com/x"
+        with self.assertRaises(BrowserError) as ctx:
+            self.browser.click("a.evil")
+        self.assertIn("evil.com", str(ctx.exception))
+        self.assertNotIn(("click", "a.evil"), self.page.calls)
+        self.assertEqual(self.browser._current_url,
+                         "https://example.com/")
+
+    def test_click_suffix_trick_blocked(self):
+        os.environ["BROWSER_ALLOWED_HOSTS"] = ".python.org"
+        self._start("https://python.org/")
+        for bad in ("https://notpython.org/",
+                    "https://python.org.evil.com/"):
+            self.page.href_map["a.bad"] = bad
+            with self.assertRaises(BrowserError):
+                self.browser.click("a.bad")
+            self.assertNotIn(("click", "a.bad"), self.page.calls)
+            self.page.calls.clear()
+
+    def test_click_plain_entry_is_exact_only(self):
+        # Same semantics as navigate: a plain entry does NOT
+        # match subdomains (that is what leading-dot entries
+        # are for). Documented, not a bug: the activation
+        # candidate therefore uses dot forms.
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "python.org"
+        self._start("https://python.org/")
+        self.page.href_map["a.docs"] = "https://docs.python.org/"
+        with self.assertRaises(BrowserError):
+            self.browser.click("a.docs")
+        self.assertNotIn(("click", "a.docs"), self.page.calls)
+
+    def test_click_port_and_case_insensitive(self):
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "Example.COM"
+        self._start()
+        self.page.href_map["a.p"] = "https://EXAMPLE.com:8443/p"
+        self.page.click_landing = "https://EXAMPLE.com:8443/p"
+        out = self.browser.click("a.p")
+        self.assertTrue(out["ok"])
+
+    def test_click_file_href_allowed(self):
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "example.com"
+        self._start()
+        self.page.href_map["a.file"] = "file:///tmp/page.html"
+        self.page.click_landing = "file:///tmp/page.html"
+        out = self.browser.click("a.file")
+        self.assertTrue(out["ok"])
+
+    def test_click_localhost_needs_explicit_listing(self):
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "example.com"
+        self._start()
+        self.page.href_map["a.local"] = "http://localhost:8000/"
+        with self.assertRaises(BrowserError):
+            self.browser.click("a.local")
+        self.assertNotIn(("click", "a.local"), self.page.calls)
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "localhost"
+        self.page.click_landing = "http://localhost:8000/"
+        out = self.browser.click("a.local")
+        self.assertTrue(out["ok"])
+
+    def test_click_relative_href_resolves_against_current(self):
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "example.com"
+        self._start("https://example.com/dir/")
+        self.page.href_map["a.rel"] = "/other"
+        self.page.click_landing = "https://example.com/other"
+        out = self.browser.click("a.rel")
+        self.assertTrue(out["ok"])
+        # Fragment-only hrefs never navigate to another host.
+        self.page.href_map["a.frag"] = "#section"
+        self.page.click_landing = None
+        out = self.browser.click("a.frag")
+        self.assertTrue(out["ok"])
+
+    def test_click_unknown_target_post_click_detection(self):
+        # Button / JS handler: no href, so no pre-click gate.
+        # The click DOES execute; a blocked landing is then
+        # reported (detection, not prevention -- the proxy 403
+        # is the layer that stops the load in production).
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "example.com"
+        self._start()
+        self.page.href_map["button.go"] = None
+        self.page.click_landing = "https://evil.com/"
+        with self.assertRaises(BrowserError) as ctx:
+            self.browser.click("button.go")
+        self.assertIn("evil.com", str(ctx.exception))
+        self.assertIn(("click", "button.go"), self.page.calls)
+        # Same target landing on an allowed host is fine.
+        self.page.click_landing = "https://example.com/ok"
+        out = self.browser.click("button.go")
+        self.assertTrue(out["ok"])
+
+    def test_click_unset_allowlist_unchanged(self):
+        os.environ.pop("BROWSER_ALLOWED_HOSTS", None)
+        self._start("https://anything.example/")
+        self.page.href_map["a.evil"] = "https://evil.com/"
+        self.page.click_landing = "https://evil.com/"
+        out = self.browser.click("a.evil")
+        self.assertTrue(out["ok"])
+        self.assertIn(("click", "a.evil"), self.page.calls)
+
+    def test_click_ref_blocked_href_refused_before_click(self):
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "example.com"
+        self._start()
+        self.browser._ref_paths = {"e0": "a.evil", "e1": "a.docs"}
+        self.page.href_map["a.evil"] = "https://evil.com/"
+        self.page.href_map["a.docs"] = "https://example.com/docs"
+        self.page.click_landing = "https://evil.com/"
+        with self.assertRaises(BrowserError):
+            self.browser.click_ref("e0")
+        self.assertNotIn(("locator_click",), self.page.calls)
+        self.page.click_landing = "https://example.com/docs"
+        out = self.browser.click_ref("e1")
+        self.assertTrue(out["ok"])
+        self.assertIn(("locator_click",), self.page.calls)
+
+    def test_click_at_post_click_only(self):
+        # click_at has no pre-click gate by design; a blocked
+        # landing raises after the click, an allowed one passes.
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "example.com"
+        self._start()
+        self.page.click_landing = "https://evil.com/"
+        with self.assertRaises(BrowserError):
+            self.browser.click_at(100, 200)
+        self.assertIn(("mouse_click", 100.0, 200.0), self.page.calls)
+        self.page.click_landing = "https://example.com/"
+        out = self.browser.click_at(100, 200)
+        self.assertTrue(out["ok"])
+
+    def test_check_navigated_url_skips_non_page_schemes(self):
+        os.environ["BROWSER_ALLOWED_HOSTS"] = "example.com"
+        # about:blank / mailto: / javascript: never navigate
+        # the page to a host, so they must not raise here.
+        _check_navigated_url("about:blank")
+        _check_navigated_url("mailto:someone@example.com")
+        _check_navigated_url("javascript:void(0)")
+        _check_navigated_url("file:///tmp/page.html")
+        with self.assertRaises(BrowserError):
+            _check_navigated_url("https://evil.com/")

cloud/tests/test_playwright_upgrade.py

@@ -0,0 +1,216 @@
+"""Safe tenant-script upgrade tests (no Docker, no network).
+
+The rule under test: only a PROVEN-unmodified tenant script
+(manifest match, known-shipped-hash match, missing, or already
+current) is auto-merged. A tenant-modified script is NEVER
+overwritten: it stays byte-identical, is reported as skipped,
+and gets exactly one deduped audit record. Reruns are idempotent.
+No real credentials appear here.
+"""
+
+import hashlib
+import json
+import os
+import sys
+import tempfile
+import unittest
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
+
+import playwright_browser as pb  # noqa: E402
+from playwright_browser import ensure_codex_home_playwright  # noqa: E402
+
+NAMES = pb.PLAYWRIGHT_SCRIPT_NAMES
+
+
+def _write_scripts(d, contents):
+    for name in NAMES:
+        with open(os.path.join(d, name), "w", encoding="utf-8") as fh:
+            fh.write(contents[name])
+
+
+def _read_scripts(d):
+    out = {}
+    for name in NAMES:
+        with open(os.path.join(d, name), encoding="utf-8") as fh:
+            out[name] = fh.read()
+    return out
+
+
+def _v1():
+    return {name: "# v1 %s\nprint('v1')\n" % name for name in NAMES}
+
+
+def _v2():
+    return {name: "# v2 %s\nprint('v2')\n" % name for name in NAMES}
+
+
+class UpgradeTest(unittest.TestCase):
+    def setUp(self):
+        self._tmp = tempfile.TemporaryDirectory()
+        self.src_v1 = os.path.join(self._tmp.name, "src-v1")
+        self.src_v2 = os.path.join(self._tmp.name, "src-v2")
+        self.home = os.path.join(self._tmp.name, "home")
+        os.makedirs(self.src_v1)
+        os.makedirs(self.src_v2)
+        os.makedirs(self.home)
+        _write_scripts(self.src_v1, _v1())
+        _write_scripts(self.src_v2, _v2())
+
+    def tearDown(self):
+        self._tmp.cleanup()
+
+    def _audit_records(self):
+        path = os.path.join(self.home, "playwright_scripts_audit.jsonl")
+        if not os.path.exists(path):
+            return []
+        with open(path, encoding="utf-8") as fh:
+            return [json.loads(line) for line in fh if line.strip()]
+
+    def test_fresh_seed_and_idempotent_rerun(self):
+        out = ensure_codex_home_playwright(self.home,
+                                           script_dir=self.src_v2)
+        self.assertEqual(_read_scripts(self.home), _v2())
+        self.assertFalse(out["script_skipped_modified"])
+        self.assertEqual(self._audit_records(), [])
+        # Config section appended exactly once.
+        with open(os.path.join(self.home, "config.toml"),
+                  encoding="utf-8") as fh:
+            config = fh.read()
+        self.assertEqual(config.count("[mcp_servers.playwright]"), 1)
+        out2 = ensure_codex_home_playwright(self.home,
+                                            script_dir=self.src_v2)
+        self.assertFalse(out2["script_changed"])
+        self.assertFalse(out2["config_changed"])
+        self.assertFalse(out2["script_refreshed"])
+        self.assertEqual(_read_scripts(self.home), _v2())
+        with open(os.path.join(self.home, "config.toml"),
+                  encoding="utf-8") as fh:
+            self.assertEqual(
+                fh.read().count("[mcp_servers.playwright]"), 1)
+
+    def test_unmodified_script_auto_merges(self):
+        ensure_codex_home_playwright(self.home, script_dir=self.src_v1)
+        out = ensure_codex_home_playwright(self.home,
+                                           script_dir=self.src_v2)
+        self.assertEqual(set(out["script_refreshed"]), set(NAMES))
+        self.assertFalse(out["script_skipped_modified"])
+        self.assertEqual(_read_scripts(self.home), _v2())
+        manifest_path = os.path.join(
+            self.home, "playwright_scripts_manifest.json")
+        with open(manifest_path, encoding="utf-8") as fh:
+            manifest = json.load(fh)
+        for name in NAMES:
+            self.assertEqual(
+                manifest[name],
+                hashlib.sha256(_v2()[name].encode()).hexdigest())
+
+    def test_modified_script_untouched_with_audit(self):
+        ensure_codex_home_playwright(self.home, script_dir=self.src_v1)
+        tenant_path = os.path.join(self.home, NAMES[0])
+        with open(tenant_path, "a", encoding="utf-8") as fh:
+            fh.write("# tenant tweak: custom timeout\n")
+        with open(tenant_path, encoding="utf-8") as fh:
+            tenant_bytes = fh.read()
+        out = ensure_codex_home_playwright(self.home,
+                                           script_dir=self.src_v2)
+        self.assertEqual(out["script_skipped_modified"], [NAMES[0]])
+        self.assertEqual(out["script_differs"], [NAMES[0]])
+        # Modified file byte-identical; the other two auto-merged.
+        with open(tenant_path, encoding="utf-8") as fh:
+            self.assertEqual(fh.read(), tenant_bytes)
+        rest = _read_scripts(self.home)
+        for name in NAMES[1:]:
+            self.assertEqual(rest[name], _v2()[name])
+        records = self._audit_records()
+        self.assertEqual(len(records), 1)
+        self.assertEqual(records[0]["action"], "skipped_modified")
+        self.assertEqual(records[0]["script"], NAMES[0])
+        self.assertEqual(
+            records[0]["dst_sha256"],
+            hashlib.sha256(tenant_bytes.encode()).hexdigest())
+
+    def test_modified_rerun_does_not_rewrite_or_duplicate_audit(self):
+        ensure_codex_home_playwright(self.home, script_dir=self.src_v1)
+        tenant_path = os.path.join(self.home, NAMES[0])
+        with open(tenant_path, "a", encoding="utf-8") as fh:
+            fh.write("# tenant tweak\n")
+        with open(tenant_path, encoding="utf-8") as fh:
+            tenant_bytes = fh.read()
+        ensure_codex_home_playwright(self.home, script_dir=self.src_v2)
+        out = ensure_codex_home_playwright(self.home,
+                                           script_dir=self.src_v2)
+        self.assertFalse(out["script_changed"])
+        self.assertEqual(out["script_skipped_modified"], [NAMES[0]])
+        self.assertEqual(len(self._audit_records()), 1)
+        with open(tenant_path, encoding="utf-8") as fh:
+            self.assertEqual(fh.read(), tenant_bytes)
+        # The manifest must NOT have learned the tenant hash:
+        # otherwise the next upgrade would mistake the modified
+        # file for untouched and overwrite it.
+        with open(os.path.join(
+                self.home, "playwright_scripts_manifest.json"),
+                encoding="utf-8") as fh:
+            manifest = json.load(fh)
+        self.assertNotEqual(
+            manifest.get(NAMES[0]),
+            hashlib.sha256(tenant_bytes.encode()).hexdigest())
+
+    def test_legacy_no_manifest_known_hash_merges(self):
+        # Legacy tenant: files seeded before manifests existed,
+        # content exactly a known shipped version -> proven
+        # unmodified, safe to merge even with no manifest.
+        old = {name: "# legacy %s\n" % name for name in NAMES}
+        _write_scripts(self.home, old)
+        patched = {name: hashlib.sha256(old[name].encode()).hexdigest()
+                   for name in NAMES}
+        saved = pb.KNOWN_SHIPPED_SCRIPT_HASHES
+        pb.KNOWN_SHIPPED_SCRIPT_HASHES = patched
+        try:
+            out = ensure_codex_home_playwright(self.home,
+                                               script_dir=self.src_v2)
+        finally:
+            pb.KNOWN_SHIPPED_SCRIPT_HASHES = saved
+        self.assertEqual(set(out["script_refreshed"]), set(NAMES))
+        self.assertEqual(_read_scripts(self.home), _v2())
+
+    def test_legacy_no_manifest_unknown_hash_skips(self):
+        old = {name: "# tenant-custom %s\n" % name for name in NAMES}
+        _write_scripts(self.home, old)
+        saved = pb.KNOWN_SHIPPED_SCRIPT_HASHES
+        pb.KNOWN_SHIPPED_SCRIPT_HASHES = {}
+        try:
+            out = ensure_codex_home_playwright(self.home,
+                                               script_dir=self.src_v2)
+        finally:
+            pb.KNOWN_SHIPPED_SCRIPT_HASHES = saved
+        self.assertEqual(set(out["script_skipped_modified"]), set(NAMES))
+        self.assertEqual(_read_scripts(self.home), old)
+        self.assertEqual(len(self._audit_records()), 3)
+
+    def test_upgrade_never_touches_tenant_data_or_config(self):
+        notes = os.path.join(self.home, "notes.txt")
+        with open(notes, "w", encoding="utf-8") as fh:
+            fh.write("tenant notes, must survive\n")
+        config = os.path.join(self.home, "config.toml")
+        with open(config, "w", encoding="utf-8") as fh:
+            fh.write('[user]\nname = "tenant"\n\n'
+                     '[mcp_servers.playwright.env]\n'
+                     'FOO = "bar"\n')
+        ensure_codex_home_playwright(self.home, script_dir=self.src_v2)
+        ensure_codex_home_playwright(self.home, script_dir=self.src_v2)
+        with open(notes, encoding="utf-8") as fh:
+            self.assertEqual(fh.read(), "tenant notes, must survive\n")
+        with open(config, encoding="utf-8") as fh:
+            text = fh.read()
+        # Existing sections intact, playwright section not
+        # duplicated (it was absent, so appended exactly once).
+        self.assertIn('[user]\nname = "tenant"', text)
+        self.assertIn('FOO = "bar"', text)
+        self.assertEqual(text.count("[mcp_servers.playwright]"), 1)
+
+    def test_known_shipped_hashes_are_well_formed(self):
+        self.assertEqual(set(pb.KNOWN_SHIPPED_SCRIPT_HASHES), set(NAMES))
+        for value in pb.KNOWN_SHIPPED_SCRIPT_HASHES.values():
+            self.assertEqual(len(value), 64)
+            int(value, 16)  # must be hex

cloud/worker.py

@@ -2765,9 +2765,10 @@ class Worker:
             # 与 imagegen 同款：播种失败直接抛错、任务不派发
             # ——静默无浏览器比 loud 失败更糟，尤其对已宣传
             # “能开浏览器”的任务。代理与浏览器路径由
-            # _prepare_tenant 的 env 块给。MCP 脚本是系统文件：
-            # 播种器在版本变化时刷新老租户的旧脚本（见
-            # ensure_codex_home_playwright），刷新记录打日志。
+            # _prepare_tenant 的 env 块给。播种器只对已证明
+            # 未改动的租户脚本自动合并新版（见
+            # ensure_codex_home_playwright）；租户改过的脚本
+            # 绝不覆盖，只记审计并打 warning 留待人工处理。
             _seeded = _ensure_playwright_mcp(
                 dirs["codex_home"],
                 command_args=[
@@ -2779,6 +2780,12 @@ class Worker:
                     "playwright MCP scripts refreshed for project %s: %s",
                     task.get("project_id"),
                     ",".join(_seeded["script_refreshed"]))
+            if _seeded.get("script_skipped_modified"):
+                self.logger.warning(
+                    "playwright MCP scripts skipped (tenant-modified, "
+                    "left untouched, see audit) for project %s: %s",
+                    task.get("project_id"),
+                    ",".join(_seeded["script_skipped_modified"]))
         if self.seed_skills:
             # 技能播种失败绝不阻塞任务：技能是可选的流程
             # 说明，不是 websearch 那种“已宣传就必须有”的