diff --git a/.gitignore b/.gitignore
index 004481c61..4a02b8bb3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -62,4 +62,4 @@ GenieData/
 .opencode/
 .kilocode/
 .worktrees/
-docs/plans/
+
diff --git a/astrbot/core/star/star_manager.py b/astrbot/core/star/star_manager.py
index cf000c5a4..57be1e9a9 100644
--- a/astrbot/core/star/star_manager.py
+++ b/astrbot/core/star/star_manager.py
@@ -1,12 +1,14 @@
 """插件的重载、启停、安装、卸载等操作。"""
 
 import asyncio
+import contextlib
 import functools
 import inspect
 import json
 import logging
 import os
 import sys
+import tempfile
 import traceback
 from types import ModuleType
 
@@ -29,12 +31,12 @@
     get_astrbot_config_path,
     get_astrbot_path,
     get_astrbot_plugin_path,
+    get_astrbot_temp_path,
 )
 from astrbot.core.utils.io import remove_dir
 from astrbot.core.utils.metrics import Metric
 from astrbot.core.utils.requirements_utils import (
-    RequirementsPrecheckFailed,
-    find_missing_requirements_or_raise,
+    plan_missing_requirements_install,
 )
 
 from . import StarMetadata
@@ -74,30 +76,78 @@ def __init__(
         self.error = error
 
 
+@contextlib.contextmanager
+def _temporary_filtered_requirements_file(
+    *,
+    install_lines: tuple[str, ...],
+):
+    filtered_requirements_path: str | None = None
+    temp_dir = get_astrbot_temp_path()
+
+    try:
+        os.makedirs(temp_dir, exist_ok=True)
+        with tempfile.NamedTemporaryFile(
+            mode="w",
+            suffix="_plugin_requirements.txt",
+            delete=False,
+            dir=temp_dir,
+            encoding="utf-8",
+        ) as filtered_requirements_file:
+            filtered_requirements_file.write("\n".join(install_lines) + "\n")
+            filtered_requirements_path = filtered_requirements_file.name
+
+        yield filtered_requirements_path
+    finally:
+        if filtered_requirements_path and os.path.exists(filtered_requirements_path):
+            try:
+                os.remove(filtered_requirements_path)
+            except OSError as exc:
+                logger.warning(
+                    "删除临时插件依赖文件失败：%s（路径：%s）",
+                    exc,
+                    filtered_requirements_path,
+                )
+
+
 async def _install_requirements_with_precheck(
     *,
     plugin_label: str,
     requirements_path: str,
 ) -> None:
-    try:
-        missing = find_missing_requirements_or_raise(requirements_path)
-    except RequirementsPrecheckFailed:
+    install_plan = plan_missing_requirements_install(requirements_path)
+
+    if install_plan is None:
         logger.info(
-            f"正在安装插件 {plugin_label} 的依赖库（预检查失败，回退到完整安装）: "
+            f"正在安装插件 {plugin_label} 的依赖库（缺失依赖预检查不可裁剪，回退到完整安装）: "
             f"{requirements_path}"
         )
         await pip_installer.install(requirements_path=requirements_path)
         return
 
-    if not missing:
+    if not install_plan.missing_names:
         logger.info(f"插件 {plugin_label} 的依赖已满足，跳过安装。")
         return
 
+    if not install_plan.install_lines:
+        fallback_reason = install_plan.fallback_reason or "unknown reason"
+        logger.info(
+            "检测到插件 %s 缺失依赖，但无法安全裁剪 requirements，回退到完整安装: %s (%s)",
+            plugin_label,
+            requirements_path,
+            fallback_reason,
+        )
+        await pip_installer.install(requirements_path=requirements_path)
+        return
+
     logger.info(
         f"检测到插件 {plugin_label} 缺失依赖，正在按 requirements.txt 安装: "
-        f"{requirements_path} -> {sorted(missing)}"
+        f"{requirements_path} -> {sorted(install_plan.missing_names)}"
     )
-    await pip_installer.install(requirements_path=requirements_path)
+
+    with _temporary_filtered_requirements_file(
+        install_lines=install_plan.install_lines,
+    ) as filtered_requirements_path:
+        await pip_installer.install(requirements_path=filtered_requirements_path)
 
 
 class PluginManager:
diff --git a/astrbot/core/utils/requirements_utils.py b/astrbot/core/utils/requirements_utils.py
index 7f3827256..e031de846 100644
--- a/astrbot/core/utils/requirements_utils.py
+++ b/astrbot/core/utils/requirements_utils.py
@@ -4,7 +4,7 @@
 import re
 import shlex
 import sys
-from collections.abc import Iterable, Iterator
+from collections.abc import Iterable, Iterator, Sequence
 from dataclasses import dataclass
 
 from packaging.requirements import InvalidRequirement, Requirement
@@ -29,6 +29,13 @@ class ParsedPackageInput:
     requirement_names: frozenset[str]
 
 
+@dataclass(frozen=True)
+class MissingRequirementsPlan:
+    missing_names: frozenset[str]
+    install_lines: tuple[str, ...]
+    fallback_reason: str | None = None
+
+
 def canonicalize_distribution_name(name: str) -> str:
     return re.sub(r"[-_.]+", "-", name).strip("-").lower()
 
@@ -364,8 +371,8 @@ def _load_requirement_lines_for_precheck(
         None,
     )
     if fallback_line is not None:
-        logger.warning(
-            "预检查缺失依赖失败，将回退到完整安装: unresolved direct reference in %s: %s",
+        logger.info(
+            "缺失依赖预检查发现无法安全裁剪的 option/direct-reference 行，将回退到完整安装: %s (%s)",
             requirements_path,
             fallback_line,
         )
@@ -381,6 +388,13 @@ def find_missing_requirements(requirements_path: str) -> set[str] | None:
     if not can_precheck or requirement_lines is None:
         return None
 
+    return find_missing_requirements_from_lines(requirement_lines)
+
+
+def find_missing_requirements_from_lines(
+    requirement_lines: Sequence[str],
+) -> set[str] | None:
+
     required = list(iter_requirements(lines=requirement_lines))
     if not required:
         return set()
@@ -401,6 +415,70 @@ def find_missing_requirements(requirements_path: str) -> set[str] | None:
     return missing
 
 
+def build_missing_requirements_install_lines(
+    requirements_path: str,
+    requirement_lines: Sequence[str],
+    missing_names: set[str] | frozenset[str],
+) -> tuple[str, ...] | None:
+    wanted_names = set(missing_names)
+    install_lines: list[str] = []
+    for line in requirement_lines:
+        parsed = _parse_requirement_line(line)
+        if parsed is None:
+            if looks_like_direct_reference(line) or line.startswith(("-", "--")):
+                logger.debug(
+                    "缺失依赖行筛选回退到完整安装：requirements 中包含无法安全裁剪的 option/direct-reference 行: %s (%s)",
+                    requirements_path,
+                    line,
+                )
+                return None
+            continue
+
+        name, _specifier = parsed
+        if name in wanted_names:
+            install_lines.append(line)
+
+    return tuple(install_lines)
+
+
+def plan_missing_requirements_install(
+    requirements_path: str,
+) -> MissingRequirementsPlan | None:
+    can_precheck, requirement_lines = _load_requirement_lines_for_precheck(
+        requirements_path
+    )
+    if not can_precheck or requirement_lines is None:
+        return None
+
+    missing = find_missing_requirements_from_lines(requirement_lines)
+    if missing is None:
+        return None
+
+    install_lines = build_missing_requirements_install_lines(
+        requirements_path,
+        requirement_lines,
+        missing,
+    )
+    if install_lines is None:
+        return None
+    if missing and not install_lines:
+        logger.warning(
+            "预检查缺失依赖成功，但无法映射到可安装 requirement 行，将回退到完整安装: %s -> %s",
+            requirements_path,
+            sorted(missing),
+        )
+        return MissingRequirementsPlan(
+            missing_names=frozenset(missing),
+            install_lines=(),
+            fallback_reason="unmapped missing requirement names",
+        )
+
+    return MissingRequirementsPlan(
+        missing_names=frozenset(missing),
+        install_lines=install_lines,
+    )
+
+
 def find_missing_requirements_or_raise(requirements_path: str) -> set[str]:
     missing = find_missing_requirements(requirements_path)
     if missing is None:
diff --git a/tests/test_pip_helper_modules.py b/tests/test_pip_helper_modules.py
index dcb5cdb21..506dd0945 100644
--- a/tests/test_pip_helper_modules.py
+++ b/tests/test_pip_helper_modules.py
@@ -145,24 +145,182 @@ def test_find_missing_requirements_or_raise_uses_requirements_exception(tmp_path
         requirements_utils.find_missing_requirements_or_raise(str(requirements_path))
 
 
+def test_build_missing_requirements_install_lines_keeps_only_missing_lines(tmp_path):
+    requirements_path = tmp_path / "requirements.txt"
+    requirements_path.write_text(
+        'aiohttp>=3.0\nboto3==1.2; python_version >= "3.0"\nbotocore\n',
+        encoding="utf-8",
+    )
+
+    install_lines = requirements_utils.build_missing_requirements_install_lines(
+        str(requirements_path),
+        [
+            "aiohttp>=3.0",
+            'boto3==1.2; python_version >= "3.0"',
+            "botocore",
+        ],
+        {"boto3", "botocore"},
+    )
+
+    assert install_lines == (
+        'boto3==1.2; python_version >= "3.0"',
+        "botocore",
+    )
+
+
+def test_build_missing_requirements_install_lines_returns_empty_tuple_when_all_satisfied(
+    tmp_path,
+):
+    requirements_path = tmp_path / "requirements.txt"
+    requirements_path.write_text("aiohttp>=3.0\nboto3\n", encoding="utf-8")
+
+    install_lines = requirements_utils.build_missing_requirements_install_lines(
+        str(requirements_path), ["aiohttp>=3.0", "boto3"], set()
+    )
+
+    assert install_lines == ()
+
+
+def test_build_missing_requirements_install_lines_returns_none_for_option_lines(
+    tmp_path,
+):
+    requirements_path = tmp_path / "requirements.txt"
+    requirements_path.write_text(
+        "--extra-index-url https://example.com/simple\nboto3\n",
+        encoding="utf-8",
+    )
+
+    install_lines = requirements_utils.build_missing_requirements_install_lines(
+        str(requirements_path),
+        ["--extra-index-url https://example.com/simple", "boto3"],
+        {"boto3"},
+    )
+
+    assert install_lines is None
+
+
+def test_build_missing_requirements_install_lines_skips_inactive_marker_lines(
+    tmp_path,
+):
+    requirements_path = tmp_path / "requirements.txt"
+    requirements_path.write_text(
+        'boto3\nother-package; sys_platform == "win32"\n',
+        encoding="utf-8",
+    )
+
+    install_lines = requirements_utils.build_missing_requirements_install_lines(
+        str(requirements_path),
+        ["boto3", 'other-package; sys_platform == "win32"'],
+        {"boto3"},
+    )
+
+    assert install_lines == ("boto3",)
+
+
+def test_plan_missing_requirements_install_returns_none_when_missing_names_cannot_map_to_lines(
+    monkeypatch,
+    tmp_path,
+):
+    requirements_path = tmp_path / "requirements.txt"
+    requirements_path.write_text("boto3\n", encoding="utf-8")
+
+    monkeypatch.setattr(
+        requirements_utils,
+        "find_missing_requirements_from_lines",
+        lambda lines: {"botocore"},
+    )
+
+    plan = requirements_utils.plan_missing_requirements_install(str(requirements_path))
+
+    assert plan is not None
+    assert plan.missing_names == frozenset({"botocore"})
+    assert plan.install_lines == ()
+    assert plan.fallback_reason == "unmapped missing requirement names"
+
+
+def test_plan_missing_requirements_install_loads_requirement_lines_once(
+    monkeypatch,
+    tmp_path,
+):
+    requirements_path = tmp_path / "requirements.txt"
+    requirements_path.write_text("boto3\nbotocore\n", encoding="utf-8")
+    calls = []
+
+    def mock_load(path):
+        calls.append(path)
+        return True, ["boto3", "botocore"]
+
+    monkeypatch.setattr(
+        requirements_utils,
+        "_load_requirement_lines_for_precheck",
+        mock_load,
+    )
+    monkeypatch.setattr(
+        requirements_utils,
+        "collect_installed_distribution_versions",
+        lambda paths: {},
+    )
+    monkeypatch.setattr(
+        requirements_utils,
+        "get_requirement_check_paths",
+        lambda: ["/tmp/site-packages"],
+    )
+
+    plan = requirements_utils.plan_missing_requirements_install(str(requirements_path))
+
+    assert plan is not None
+    assert plan.missing_names == frozenset({"boto3", "botocore"})
+    assert plan.install_lines == ("boto3", "botocore")
+    assert calls == [str(requirements_path)]
+
+
+def test_build_missing_requirements_install_lines_logs_why_option_lines_fall_back(
+    monkeypatch,
+    tmp_path,
+):
+    requirements_path = tmp_path / "requirements.txt"
+    requirements_path.write_text(
+        "--extra-index-url https://example.com/simple\nboto3\n",
+        encoding="utf-8",
+    )
+
+    debug_logs = []
+
+    monkeypatch.setattr(
+        "astrbot.core.utils.requirements_utils.logger.debug",
+        lambda line, *args: debug_logs.append(line % args if args else line),
+    )
+
+    install_lines = requirements_utils.build_missing_requirements_install_lines(
+        str(requirements_path),
+        ["--extra-index-url https://example.com/simple", "boto3"],
+        {"boto3"},
+    )
+
+    assert install_lines is None
+    assert any(str(requirements_path) in log for log in debug_logs)
+    assert any("option/direct-reference" in log for log in debug_logs)
+
+
 def test_find_missing_requirements_logs_path_and_reason_on_precheck_fallback(
     monkeypatch,
     tmp_path,
 ):
     requirements_path = tmp_path / "requirements.txt"
     requirements_path.write_text("git+https://example.com/demo.git\n", encoding="utf-8")
-    warning_logs = []
+
+    info_logs = []
 
     monkeypatch.setattr(
-        "astrbot.core.utils.requirements_utils.logger.warning",
-        lambda line, *args: warning_logs.append(line % args if args else line),
+        "astrbot.core.utils.requirements_utils.logger.info",
+        lambda line, *args: info_logs.append(line % args if args else line),
     )
 
     missing = requirements_utils.find_missing_requirements(str(requirements_path))
 
     assert missing is None
-    assert any(str(requirements_path) in log for log in warning_logs)
-    assert any("direct reference" in log for log in warning_logs)
+    assert any(str(requirements_path) in log for log in info_logs)
+    assert any("option/direct-reference" in log for log in info_logs)
 
 
 def test_load_requirement_lines_for_precheck_uses_parse_requirement_line_result(
diff --git a/tests/test_plugin_manager.py b/tests/test_plugin_manager.py
index 1b52990a5..b1dafc87e 100644
--- a/tests/test_plugin_manager.py
+++ b/tests/test_plugin_manager.py
@@ -1,4 +1,5 @@
 import asyncio
+import os
 from pathlib import Path
 
 import pytest
@@ -6,6 +7,7 @@
 
 from astrbot.core.star.star_manager import PluginDependencyInstallError, PluginManager
 from astrbot.core.utils.pip_installer import PipInstallError
+from astrbot.core.utils.requirements_utils import MissingRequirementsPlan
 
 # --- Test Data & Helpers ---
 
@@ -74,13 +76,25 @@ async def mock_reload(specified_dir_name=None):
     return mock_reload
 
 
-def _build_dependency_install_mock(events, fail: bool):
+def _build_dependency_install_mock(
+    events,
+    fail: bool,
+    *,
+    capture_content: bool = False,
+):
     async def mock_install_requirements(
-        *, requirements_path: str = None, package_name: str = None, **kwargs
+        *,
+        requirements_path: str | None = None,
+        package_name: str | None = None,
+        **kwargs,
     ):
         del kwargs
         if requirements_path:
-            events.append(("deps", str(requirements_path)))
+            path = Path(requirements_path)
+            event = ("deps", str(path))
+            if capture_content:
+                event = (*event, path.read_text(encoding="utf-8"))
+            events.append(event)
         if package_name:
             events.append(("deps_pkg", package_name))
         if fail:
@@ -90,24 +104,56 @@ async def mock_install_requirements(
 
 
 def _mock_missing_requirements(monkeypatch, missing: set[str]):
+    _mock_missing_requirements_plan(monkeypatch, missing, sorted(missing))
+
+
+def _mock_missing_requirements_plan(
+    monkeypatch,
+    missing_names,
+    install_lines,
+    *,
+    fallback_reason: str | None = None,
+):
     monkeypatch.setattr(
-        "astrbot.core.star.star_manager.find_missing_requirements_or_raise",
-        lambda requirements_path: missing,
+        "astrbot.core.star.star_manager.plan_missing_requirements_install",
+        lambda requirements_path: MissingRequirementsPlan(
+            missing_names=frozenset(missing_names),
+            install_lines=tuple(install_lines),
+            fallback_reason=fallback_reason,
+        ),
     )
 
 
 def _mock_precheck_fails(monkeypatch):
-    from astrbot.core import RequirementsPrecheckFailed
-
-    def mock_fail(requirements_path):
-        raise RequirementsPrecheckFailed("mock precheck failure")
-
     monkeypatch.setattr(
-        "astrbot.core.star.star_manager.find_missing_requirements_or_raise",
-        mock_fail,
+        "astrbot.core.star.star_manager.plan_missing_requirements_install",
+        lambda requirements_path: None,
     )
 
 
+def _assert_dependency_install_event_matches(
+    event,
+    *,
+    expected_original_path: Path,
+    expected_content: str | None = None,
+    expect_filtered_tempfile: bool | None = None,
+):
+    assert event[0] == "deps"
+    used_path = Path(event[1])
+    should_be_filtered = expected_content is not None
+    if expect_filtered_tempfile is not None:
+        should_be_filtered = expect_filtered_tempfile
+
+    if not should_be_filtered:
+        assert used_path == expected_original_path
+    else:
+        assert used_path != expected_original_path
+        assert used_path.name.endswith("_plugin_requirements.txt")
+    if expected_content is not None:
+        if len(event) >= 3:
+            assert event[2] == expected_content
+
+
 # --- Fixtures ---
 
 
@@ -188,13 +234,21 @@ def mock_load_and_register(*args, **kwargs):
     if dependency_install_fails:
         with pytest.raises(PluginDependencyInstallError, match="pip failed"):
             await plugin_manager_pm.install_plugin(TEST_PLUGIN_REPO)
-        assert events == [("deps", str(plugin_path / "requirements.txt"))]
+        assert len(events) == 1
+        _assert_dependency_install_event_matches(
+            events[0],
+            expected_original_path=plugin_path / "requirements.txt",
+            expected_content="networkx\n",
+        )
     else:
         await plugin_manager_pm.install_plugin(TEST_PLUGIN_REPO)
-        assert events == [
-            ("deps", str(plugin_path / "requirements.txt")),
-            ("load", TEST_PLUGIN_DIR),
-        ]
+        assert len(events) == 2
+        _assert_dependency_install_event_matches(
+            events[0],
+            expected_original_path=plugin_path / "requirements.txt",
+            expected_content="networkx\n",
+        )
+        assert events[1] == ("load", TEST_PLUGIN_DIR)
 
 
 @pytest.mark.asyncio
@@ -265,13 +319,21 @@ def mock_load_and_register(*args, **kwargs):
     if dependency_install_fails:
         with pytest.raises(PluginDependencyInstallError, match="pip failed"):
             await plugin_manager_pm.reload_failed_plugin(TEST_PLUGIN_DIR)
-        assert events == [("deps", str(local_updator / "requirements.txt"))]
+        assert len(events) == 1
+        _assert_dependency_install_event_matches(
+            events[0],
+            expected_original_path=local_updator / "requirements.txt",
+            expected_content="networkx\n",
+        )
     else:
         await plugin_manager_pm.reload_failed_plugin(TEST_PLUGIN_DIR)
-        assert events == [
-            ("deps", str(local_updator / "requirements.txt")),
-            ("load", TEST_PLUGIN_DIR),
-        ]
+        assert len(events) == 2
+        _assert_dependency_install_event_matches(
+            events[0],
+            expected_original_path=local_updator / "requirements.txt",
+            expected_content="networkx\n",
+        )
+        assert events[1] == ("load", TEST_PLUGIN_DIR)
 
 
 @pytest.mark.asyncio
@@ -337,7 +399,9 @@ async def mock_install_requirements(*args, **kwargs):
         mock_install_requirements,
     )
 
-    with pytest.raises(PluginDependencyInstallError, match="install failed") as exc_info:
+    with pytest.raises(
+        PluginDependencyInstallError, match="install failed"
+    ) as exc_info:
         await plugin_manager_pm._ensure_plugin_requirements(
             str(local_updator),
             TEST_PLUGIN_DIR,
@@ -403,10 +467,20 @@ async def mock_update(plugin, proxy=""):
     if dependency_install_fails:
         with pytest.raises(PluginDependencyInstallError, match="pip failed"):
             await plugin_manager_pm.update_plugin(TEST_PLUGIN_NAME)
-        assert ("deps", str(local_updator / "requirements.txt")) in events
+        dep_event = next(event for event in events if event[0] == "deps")
+        _assert_dependency_install_event_matches(
+            dep_event,
+            expected_original_path=local_updator / "requirements.txt",
+            expected_content="networkx\n",
+        )
     else:
         await plugin_manager_pm.update_plugin(TEST_PLUGIN_NAME)
-        assert ("deps", str(local_updator / "requirements.txt")) in events
+        dep_event = next(event for event in events if event[0] == "deps")
+        _assert_dependency_install_event_matches(
+            dep_event,
+            expected_original_path=local_updator / "requirements.txt",
+            expected_content="networkx\n",
+        )
         assert ("reload", TEST_PLUGIN_DIR) in events
 
 
@@ -468,5 +542,144 @@ def mock_load_and_register(*args, **kwargs):
 
     await plugin_manager_pm.install_plugin(TEST_PLUGIN_REPO)
 
-    assert ("deps", str(plugin_path / "requirements.txt")) in events
+    dep_event = next(event for event in events if event[0] == "deps")
+    _assert_dependency_install_event_matches(
+        dep_event,
+        expected_original_path=plugin_path / "requirements.txt",
+    )
     assert ("load", TEST_PLUGIN_DIR) in events
+
+
+@pytest.mark.asyncio
+async def test_ensure_plugin_requirements_installs_only_missing_requirement_lines(
+    plugin_manager_pm: PluginManager, local_updator: Path, monkeypatch
+):
+    requirements_path = local_updator / "requirements.txt"
+    requirements_path.write_text(
+        "aiohttp>=3.0\nboto3==1.2\nbotocore\n",
+        encoding="utf-8",
+    )
+    events = []
+    _mock_missing_requirements_plan(
+        monkeypatch, {"boto3", "botocore"}, ["boto3==1.2", "botocore"]
+    )
+
+    monkeypatch.setattr(
+        "astrbot.core.star.star_manager.pip_installer.install",
+        _build_dependency_install_mock(events, False, capture_content=True),
+    )
+
+    await plugin_manager_pm._ensure_plugin_requirements(
+        str(local_updator),
+        TEST_PLUGIN_DIR,
+    )
+
+    assert len(events) == 1
+    kind, used_path, content = events[0]
+    assert kind == "deps"
+    assert used_path != str(requirements_path)
+    assert content == "boto3==1.2\nbotocore\n"
+    assert not Path(used_path).exists()
+
+
+@pytest.mark.asyncio
+async def test_ensure_plugin_requirements_creates_temp_dir_before_filtered_install(
+    plugin_manager_pm: PluginManager, local_updator: Path, monkeypatch, tmp_path
+):
+    requirements_path = local_updator / "requirements.txt"
+    requirements_path.write_text("boto3\n", encoding="utf-8")
+    temp_dir = tmp_path / "missing-temp-dir"
+    events = []
+    _mock_missing_requirements_plan(monkeypatch, {"boto3"}, ["boto3"])
+
+    monkeypatch.setattr(
+        "astrbot.core.star.star_manager.get_astrbot_temp_path",
+        lambda: str(temp_dir),
+    )
+    monkeypatch.setattr(
+        "astrbot.core.star.star_manager.pip_installer.install",
+        _build_dependency_install_mock(events, False, capture_content=True),
+    )
+
+    await plugin_manager_pm._ensure_plugin_requirements(
+        str(local_updator),
+        TEST_PLUGIN_DIR,
+    )
+
+    assert temp_dir.is_dir()
+    assert len(events) == 1
+
+
+@pytest.mark.asyncio
+async def test_ensure_plugin_requirements_falls_back_when_missing_names_have_no_install_lines(
+    plugin_manager_pm: PluginManager, local_updator: Path, monkeypatch
+):
+    requirements_path = local_updator / "requirements.txt"
+    requirements_path.write_text("boto3\n", encoding="utf-8")
+    events = []
+
+    monkeypatch.setattr(
+        "astrbot.core.star.star_manager.plan_missing_requirements_install",
+        lambda path: MissingRequirementsPlan(
+            missing_names=frozenset({"botocore"}),
+            install_lines=(),
+            fallback_reason="unmapped missing requirement names",
+        ),
+    )
+    monkeypatch.setattr(
+        "astrbot.core.star.star_manager.pip_installer.install",
+        _build_dependency_install_mock(events, False),
+    )
+
+    await plugin_manager_pm._ensure_plugin_requirements(
+        str(local_updator),
+        TEST_PLUGIN_DIR,
+    )
+
+    assert events == [("deps", str(requirements_path))]
+
+
+@pytest.mark.asyncio
+async def test_ensure_plugin_requirements_does_not_mask_install_error_when_cleanup_fails(
+    plugin_manager_pm: PluginManager, local_updator: Path, monkeypatch, tmp_path
+):
+    requirements_path = local_updator / "requirements.txt"
+    requirements_path.write_text("boto3\n", encoding="utf-8")
+    temp_dir = tmp_path / "cleanup-fails"
+    _mock_missing_requirements_plan(monkeypatch, {"boto3"}, ["boto3"])
+    warning_logs = []
+
+    async def mock_install_requirements(
+        *, requirements_path: str | None = None, **kwargs
+    ):
+        del kwargs, requirements_path
+        raise RuntimeError("pip failed")
+
+    original_remove = os.remove
+
+    def flaky_remove(path):
+        if str(path).endswith("_plugin_requirements.txt"):
+            raise OSError("cleanup failed")
+        return original_remove(path)
+
+    monkeypatch.setattr(
+        "astrbot.core.star.star_manager.get_astrbot_temp_path",
+        lambda: str(temp_dir),
+    )
+    monkeypatch.setattr(
+        "astrbot.core.star.star_manager.pip_installer.install",
+        mock_install_requirements,
+    )
+    monkeypatch.setattr("astrbot.core.star.star_manager.os.remove", flaky_remove)
+    monkeypatch.setattr(
+        "astrbot.core.star.star_manager.logger.warning",
+        lambda line, *args: warning_logs.append(line % args if args else line),
+    )
+
+    with pytest.raises(PluginDependencyInstallError, match="pip failed"):
+        await plugin_manager_pm._ensure_plugin_requirements(
+            str(local_updator),
+            TEST_PLUGIN_DIR,
+        )
+
+    assert any("删除临时插件依赖文件失败" in log for log in warning_logs)