diff --git a/app/api/endpoints/plugin.py b/app/api/endpoints/plugin.py
index a0719720d..1d7669b8c 100644
--- a/app/api/endpoints/plugin.py
+++ b/app/api/endpoints/plugin.py
@@ -4,15 +4,14 @@
 
 import asyncio
 import mimetypes
-from collections.abc import AsyncIterator
 from typing import Annotated, Any, Dict, List, Mapping, Optional, cast
 from urllib.parse import urlsplit
 
-import aiofiles
 from anyio import Path as AsyncPath
-from fastapi import Depends, Header, HTTPException, Query, Response, Security
+from fastapi import Depends, Header, HTTPException, Query, Request, Response, Security
 from starlette import status
-from starlette.responses import StreamingResponse
+from starlette.responses import FileResponse
+from starlette.staticfiles import StaticFiles
 
 from app.adapters.web.security.access import (
     resource_token_cookie,
@@ -761,7 +760,7 @@ def reset_plugin(
     "/file/{plugin_id}/{filepath:path}",
     summary="获取插件静态文件",
     response_model=None,
-    response_class=StreamingResponse,
+    response_class=FileResponse,
     responses={
         200: {
             "description": "插件静态资源",
@@ -770,23 +769,31 @@ def reset_plugin(
                 "application/javascript": {"schema": {"type": "string"}},
                 "text/css": {"schema": {"type": "string"}},
             },
-        }
+        },
+        304: {"description": "插件静态资源未修改，复用浏览器缓存"},
     },
 )
 async def plugin_static_file(
     plugin_id: str,
     filepath: str,
+    request: Request,
     _: None = Depends(_verify_plugin_static_file_access),
-) -> StreamingResponse:
+) -> Response:
     """
-    获取插件静态文件
+    在访问校验后返回插件文件，支持私有缓存及 ETag、修改时间条件请求。
+
+    当前插件版本的入口可长期复用；其余文件每次校验，
+    避免无版本入口或同名文件更新后继续使用旧内容。
     """
     # 基础安全检查
     if ".." in filepath or ".." in plugin_id:
         logger.warning(f"Static File API: Path traversal attempt detected: {plugin_id}/{filepath}")
         raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Forbidden")
 
-    source_plugin_id = get_plugin_manager().get_plugin_source_id(plugin_id)
+    manager = get_plugin_manager()
+    # 联邦入口使用小写 URL，运行时注册表保留插件 ID 原有大小写。
+    runtime_id = next((pid for pid in manager.get_plugin_ids() if pid.lower() == plugin_id.lower()), plugin_id)
+    source_plugin_id = manager.get_plugin_source_id(runtime_id)
     plugin_base_dir = (
         AsyncPath(get_api_runtime_config_snapshot().root_path) / "app" / "plugins" / source_plugin_id.lower()
     )
@@ -818,31 +825,23 @@ async def plugin_static_file(
     elif suffix == ".css" and not guessed_response_type:
         response_type = "text/css"
 
-    try:
-        # 异步生成器函数，用于流式读取文件
-        async def file_generator() -> AsyncIterator[bytes]:
-            """
-            分块异步读取插件文件供下载响应使用。
-            """
-            async with aiofiles.open(plugin_file_path, mode="rb") as file:
-                # 8KB 块大小
-                while chunk := await file.read(8192):
-                    yield chunk
-
-        return StreamingResponse(
-            file_generator(),
-            media_type=response_type,
-            headers={
-                "Content-Disposition": f"inline; filename={plugin_file_path.name}",
-                "Cache-Control": "no-cache, must-revalidate",
-            },
-        )
-    except Exception as e:
-        logger.error(
-            f"Error creating/sending StreamingResponse for {plugin_file_path}: {e}",
-            exc_info=True,
-        )
-        raise HTTPException(status_code=500, detail="Internal Server Error")
+    version = request.query_params.get("v")
+    current_version = manager.get_plugin_attr(runtime_id, "plugin_version")
+    versioned = bool(version and current_version and version == str(current_version))
+    cache_control = "private, max-age=31536000, immutable" if versioned else "private, no-cache"
+    response = FileResponse(
+        str(plugin_file_path),
+        stat_result=await plugin_file_path.stat(),
+        media_type=response_type,
+        headers={"Cache-Control": cache_control},
+        filename=plugin_file_path.name,
+        content_disposition_type="inline",
+    )
+    if StaticFiles().is_not_modified(response.headers, request.headers):
+        return Response(status_code=304, headers={
+            key: response.headers[key] for key in ("cache-control", "etag", "last-modified")
+        })
+    return response
 
 
 @router.get(
diff --git a/app/application/plugin/rating.py b/app/application/plugin/rating.py
index 5e97032b8..36d013230 100644
--- a/app/application/plugin/rating.py
+++ b/app/application/plugin/rating.py
@@ -4,9 +4,13 @@
 
 from __future__ import annotations
 
-from collections.abc import Awaitable, Callable, Mapping, Sequence
+from collections.abc import Awaitable, Callable, Hashable, Mapping, Sequence
+from copy import deepcopy
+from time import monotonic
 from typing import Any
 
+from cachetools import TTLCache
+
 StatisticLoader = Callable[[], Awaitable[Mapping[str, Any]]]
 RatingsLoader = Callable[[list[str] | None], Awaitable[Mapping[str, Any]]]
 RatingLoader = Callable[[str], Awaitable[Mapping[str, Any]]]
@@ -32,29 +36,55 @@ class PluginRatingService:
         ratings: RatingsLoader,
         rating: RatingLoader,
         submit: RatingSubmitter,
+        cache_scope: Callable[[], Hashable] = lambda: None,
     ) -> None:
         """
-        保存安装状态读取和远程评分窄端口。
+        保存安装状态读取和远程评分窄端口，创建当前 lifespan 的有界缓存。
+
+        :param cache_scope: 当前中心端、实例身份和统计开关组成的缓存隔离标识
         """
         self._installed_plugins = installed_plugins
         self._statistic = statistic
         self._ratings = ratings
         self._rating = rating
         self._submit = submit
+        self._cache_scope = cache_scope
+        # 仅由主事件循环访问；随 lifespan 释放，不把实例评分持久化到共享缓存。
+        self._metrics: TTLCache[tuple[Hashable, str, tuple[str, ...] | None], Mapping[str, Any]] = TTLCache(
+            maxsize=128, ttl=300, timer=monotonic
+        )
+        self._revision = 0
+
+    async def _cached_query(
+        self, kind: str, plugin_ids: tuple[str, ...] | None, loader: StatisticLoader
+    ) -> Mapping[str, Any]:
+        """
+        复用五分钟内的指标结果，按中心端与实例身份隔离，失败空结果不缓存。
+
+        评分提交期间发出的旧查询不得覆盖提交后的缓存；向调用方返回独立副本。
+        """
+        key = (self._cache_scope(), kind, plugin_ids)
+        cached = self._metrics.get(key)
+        if cached is not None:
+            return deepcopy(cached)
+        revision = self._revision
+        result = await loader()
+        if result and revision == self._revision:
+            self._metrics[key] = deepcopy(result)
+        return deepcopy(result)
 
     async def statistic(self) -> Mapping[str, Any]:
         """
-        返回插件安装统计。
+        返回插件安装统计，复用当前实例最近五分钟的非空结果。
         """
-        return await self._statistic()
+        return await self._cached_query("statistic", None, self._statistic)
 
-    async def ratings(
-        self, plugin_ids: list[str] | None
-    ) -> Mapping[str, Any]:
+    async def ratings(self, plugin_ids: list[str] | None) -> Mapping[str, Any]:
         """
-        批量返回插件评分快照。
+        批量返回插件评分快照，同一 ID 集合五分钟内不重复外呼。
         """
-        return await self._ratings(plugin_ids)
+        ids = tuple(sorted(set(plugin_ids))) if plugin_ids is not None else None
+        return await self._cached_query("ratings", ids, lambda: self._ratings(plugin_ids))
 
     async def rating(self, plugin_id: str) -> Mapping[str, Any]:
         """
@@ -68,7 +98,11 @@ class PluginRatingService:
         """
         if plugin_id not in self._installed_plugins():
             raise PluginNotInstalledError(f"插件 {plugin_id} 未安装，无法评分")
-        return await self._submit(plugin_id, rating)
+        result = await self._submit(plugin_id, rating)
+        if result is not None:
+            self._revision += 1
+            self._metrics.clear()
+        return result
 
 
 _rating_service: PluginRatingService | None = None
diff --git a/app/startup/initializers/plugins.py b/app/startup/initializers/plugins.py
index b842e6505..a921f436f 100644
--- a/app/startup/initializers/plugins.py
+++ b/app/startup/initializers/plugins.py
@@ -625,6 +625,11 @@ def configure_plugin_services() -> None:
             ratings=MoviePilotServerHelper.async_get_plugin_ratings,
             rating=MoviePilotServerHelper.async_get_plugin_rating,
             submit=MoviePilotServerHelper.async_submit_plugin_rating,
+            cache_scope=lambda: (
+                get_runtime_setting("MP_SERVER_HOST"),
+                MoviePilotServerHelper.get_user_uid(),
+                bool(get_runtime_setting("PLUGIN_STATISTIC_SHARE")),
+            ),
         )
     )
 
diff --git a/docs/mcp-api.md b/docs/mcp-api.md
index d17e4a608..d9e2a9f4d 100644
--- a/docs/mcp-api.md
+++ b/docs/mcp-api.md
@@ -36,6 +36,16 @@
 缺失或超时返回 `{"url":null}`，不要求先安装插件。本地来源只返回显式声明的链接。
 探测总时限为五秒，结果缓存五分钟；接口不返回文档正文，也不新增 Agent operation。
 
+### 插件静态资源与指标缓存
+
+`GET /api/v1/plugin/file/{plugin_id}/{filepath}` 继续校验资源访问权限，返回私有浏览器缓存、
+`ETag` 和 `Last-Modified`；条件请求命中时返回无响应体的 `304`。`v` 参数与当前插件版本
+一致时允许长期缓存，其他资源每次重新校验，更新后不复用旧文件内容。插件资源仍不进入
+前端 Service Worker 的通用脚本缓存。
+
+插件批量评分和安装统计的非空结果在当前进程缓存五分钟，按中心端、实例身份和统计开关
+隔离；提交评分成功会使指标缓存失效。单插件详情仍实时查询，中心端失败的空结果不缓存。
+
 ### 插件生命周期忙碌与超时
 
 `plugin.runtime.status`（`GET /api/v1/plugin/runtime`）的可选 `active_operation` 返回当前
diff --git a/tests/test_plugin_endpoint.py b/tests/test_plugin_endpoint.py
index 93c12cad2..608561e82 100644
--- a/tests/test_plugin_endpoint.py
+++ b/tests/test_plugin_endpoint.py
@@ -11,7 +11,9 @@ from types import SimpleNamespace
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
+from fastapi import Request
 from starlette.responses import Response
+from starlette.testclient import TestClient
 
 from app import schemas
 from app.api.endpoints import plugin as plugin_endpoint
@@ -1363,17 +1365,12 @@ def test_virtual_instance_static_file_reads_from_source_directory(tmp_path, monk
         lambda: MagicMock(root_path=tmp_path),
     )
 
-    response = asyncio.run(plugin_static_file("DemoPluginwork", "dist/remoteEntry.js", None))
+    request = Request({"type": "http", "headers": [], "query_string": b""})
+    response = asyncio.run(plugin_static_file("DemoPluginwork", "dist/remoteEntry.js", request, None))
 
-    async def read_body() -> bytes:
-        """
-        读取流式响应的全部测试内容。
-        """
-        return b"".join([chunk async for chunk in response.body_iterator])
-
-    assert asyncio.run(read_body()) == b"export default 'shared'"
+    assert TestClient(response).get("/").content == b"export default 'shared'"
     assert response.media_type == "application/javascript"
-    assert response.headers["cache-control"] == "no-cache, must-revalidate"
+    assert response.headers["cache-control"] == "private, no-cache"
     plugin_manager.get_plugin_source_id.assert_called_once_with("DemoPluginwork")
 
 
diff --git a/tests/test_plugin_rating.py b/tests/test_plugin_rating.py
index b01fe693e..a16c9b51d 100644
--- a/tests/test_plugin_rating.py
+++ b/tests/test_plugin_rating.py
@@ -150,3 +150,67 @@ def test_plugin_rating_service_reset_isolates_lifespans(monkeypatch) -> None:
 
     with pytest.raises(RuntimeError, match="尚未完成初始化"):
         rating_module.get_plugin_rating_service()
+
+
+@pytest.mark.asyncio
+async def test_metrics_cache_expires_and_isolates_identity_and_callers(monkeypatch) -> None:
+    """
+    五分钟内同集合查询复用副本，缓存到期或中心端身份变化后重新读取。
+    """
+    clock = [0.0]
+    scope = ["instance-one"]
+    monkeypatch.setattr(rating_module, "monotonic", lambda: clock[0])
+    ratings = AsyncMock(return_value={"Demo": {"average_rating": 4.0}})
+    statistic = AsyncMock(return_value={"Demo": 20})
+    service = PluginRatingService(
+        installed_plugins=lambda: ["Demo"], statistic=statistic, ratings=ratings,
+        rating=AsyncMock(), submit=AsyncMock(), cache_scope=lambda: scope[0],
+    )
+    first = await service.ratings(["Demo", "Other"])
+    first["Demo"]["average_rating"] = 1
+    assert (await service.ratings(["Other", "Demo", "Demo"]))["Demo"]["average_rating"] == 4
+    ratings.assert_awaited_once()
+    assert await service.statistic() == await service.statistic() == {"Demo": 20}
+    statistic.assert_awaited_once()
+    clock[0] = 301
+    await service.ratings(["Demo", "Other"])
+    await service.statistic()
+    assert ratings.await_count == statistic.await_count == 2
+    scope[0] = "instance-two"
+    await service.ratings(["Demo", "Other"])
+    await service.statistic()
+    assert ratings.await_count == statistic.await_count == 3
+
+
+@pytest.mark.asyncio
+async def test_failed_metrics_are_not_cached_and_submit_invalidates_inflight_reads() -> None:
+    """
+    空失败结果立即允许重试，成功评分后在途旧结果不能再次写入缓存。
+    """
+    old_result = asyncio.Future()
+    ratings = AsyncMock(side_effect=[{}, {"Demo": {"average_rating": 1.0}}])
+    service = PluginRatingService(
+        installed_plugins=lambda: ["Demo"], statistic=AsyncMock(return_value={}),
+        ratings=ratings, rating=AsyncMock(), submit=AsyncMock(return_value={"average_rating": 5.0}),
+    )
+    assert await service.ratings(["Demo"]) == {}
+    assert await service.ratings(["Demo"]) == {"Demo": {"average_rating": 1.0}}
+    assert ratings.await_count == 2
+    await service.submit("Demo", 5.0)
+
+    async def pending_query(_ids):
+        """
+        保留一个评分提交前发出的查询，模拟中心端迟到的旧响应。
+        """
+        return await old_result
+
+    ratings.side_effect = pending_query
+    pending = asyncio.create_task(service.ratings(["Demo"]))
+    await asyncio.sleep(0)
+    await service.submit("Demo", 5.0)
+    old_result.set_result({"Demo": {"average_rating": 1.0}})
+    await pending
+    ratings.side_effect = None
+    ratings.return_value = {"Demo": {"average_rating": 5.0}}
+    assert await service.ratings(["Demo"]) == ratings.return_value
+    assert ratings.await_count == 4
diff --git a/tests/test_plugin_static.py b/tests/test_plugin_static.py
new file mode 100644
index 000000000..c2de52d90
--- /dev/null
+++ b/tests/test_plugin_static.py
@@ -0,0 +1,101 @@
+"""
+验证插件静态资源的浏览器缓存、条件请求和访问安全边界。
+"""
+
+from types import SimpleNamespace
+from unittest.mock import Mock
+
+import pytest
+from fastapi import FastAPI, HTTPException
+from starlette.testclient import TestClient
+
+from app.api.endpoints import plugin
+
+
+@pytest.fixture
+def static_files(tmp_path, monkeypatch):
+    """
+    在临时插件目录与独立路由中提供资源，保留真实访问校验依赖。
+    """
+    root = tmp_path / "app/plugins/demo/dist"
+    root.mkdir(parents=True)
+    (root / "remoteEntry.js").write_text("export const version = 1", encoding="utf-8")
+    (root / "chunk.js").write_text("export const value = 1", encoding="utf-8")
+    manager = Mock()
+    manager.get_plugin_source_id.return_value = "Demo"
+    manager.get_plugin_ids.return_value = ["Demo"]
+    manager.get_plugin_attr.return_value = "1.0.0"
+    manager.get_plugin_auth_providers.return_value = []
+    verify = Mock()
+    monkeypatch.setattr(plugin, "get_plugin_manager", lambda: manager)
+    monkeypatch.setattr(plugin, "verify_resource_token", verify)
+    monkeypatch.setattr(plugin, "get_api_runtime_config_snapshot", lambda: SimpleNamespace(root_path=tmp_path))
+    app = FastAPI()
+    app.include_router(plugin.router, prefix="/plugin")
+    return TestClient(app), root, manager, verify
+
+
+def test_current_version_entry_is_private_and_cacheable(static_files):
+    """
+    只有当前版本参数可授予长期私有缓存，且返回文件校验头。
+    """
+    client, _, manager, _ = static_files
+    response = client.get("/plugin/file/demo/dist/remoteEntry.js?v=1.0.0")
+    assert response.status_code == 200
+    assert response.content == b"export const version = 1"
+    assert response.headers["content-type"].startswith("application/javascript")
+    assert response.headers["cache-control"] == "private, max-age=31536000, immutable"
+    assert response.headers["etag"]
+    assert response.headers["last-modified"]
+    manager.get_plugin_attr.assert_called_once_with("Demo", "plugin_version")
+    manager.get_plugin_attr.return_value = "2.0.0"
+    assert client.get("/plugin/file/Demo/dist/remoteEntry.js?v=1.0.0").headers["cache-control"] == "private, no-cache"
+    assert "immutable" in client.get("/plugin/file/Demo/dist/remoteEntry.js?v=2.0.0").headers["cache-control"]
+
+
+@pytest.mark.parametrize("validator", ["etag", "last-modified"])
+def test_unversioned_chunks_revalidate_without_resending_body(static_files, validator):
+    """
+    无版本 chunk 保留缓存内容，条件命中时仍校验权限并返回无响应体的 304。
+    """
+    client, _, _, verify = static_files
+    url = "/plugin/file/Demo/dist/chunk.js"
+    first = client.get(url)
+    header = "If-None-Match" if validator == "etag" else "If-Modified-Since"
+    response = client.get(url, headers={header: first.headers[validator]})
+    assert response.status_code == 304
+    assert response.content == b""
+    assert response.headers["cache-control"] == "private, no-cache"
+    assert response.headers[validator] == first.headers[validator]
+    assert verify.call_count == 2
+    verify.side_effect = HTTPException(status_code=403, detail="Forbidden")
+    assert client.get(url, headers={header: first.headers[validator]}).status_code == 403
+
+
+def test_changed_file_and_nonmatching_etag_return_new_body(static_files):
+    """
+    文件改变或 ETag 不匹配时，不被旧修改时间错误判为未修改。
+    """
+    client, root, _, _ = static_files
+    url = "/plugin/file/Demo/dist/chunk.js"
+    first = client.get(url)
+    (root / "chunk.js").write_text("export const value = 'updated'", encoding="utf-8")
+    response = client.get(url, headers={
+        "If-None-Match": first.headers["etag"],
+        "If-Modified-Since": "Wed, 01 Jan 2099 00:00:00 GMT",
+    })
+    assert response.status_code == 200
+    assert response.headers["etag"] != first.headers["etag"]
+    assert response.content == b"export const value = 'updated'"
+
+
+def test_missing_and_escaped_files_are_not_cacheable(static_files, tmp_path):
+    """
+    缺失资源与指向插件外的符号链接保持原有拒绝语义。
+    """
+    client, root, _, _ = static_files
+    outside = tmp_path / "outside.js"
+    outside.write_text("private", encoding="utf-8")
+    (root / "escaped.js").symlink_to(outside)
+    assert client.get("/plugin/file/Demo/dist/escaped.js").status_code == 403
+    assert client.get("/plugin/file/Demo/dist/missing.js?v=1.0.0").status_code == 404