diff --git a/scripts/setup_runtime.py b/scripts/setup_runtime.py
new file mode 100644
index 0000000..a030b77
--- /dev/null
+++ b/scripts/setup_runtime.py
@@ -0,0 +1,177 @@
+"""一键准备 v2 本地运行时：下载 llama-server 二进制与默认 GGUF 模型。
+
+用法：
+    python scripts/setup_runtime.py [--config config/config.yaml]
+
+行为（对齐《实现方案_v2》6.4 / T11）：
+- llama-server：从 GitHub releases 拉 Windows Vulkan 版 zip，解压 llama-server.exe 到 bin/。
+- GGUF：优先 hf-mirror.com（env HF_MIRROR 可覆盖），HTTP Range 断点续传，文件大小校验（±1MB）。
+- 网络失败：打印手动下载指引后优雅退出（不崩溃）。
+- 完成后打印三档硬件检测结果与所选档位（hw_profile.detect_summary()）。
+
+下载函数可注入（tests 用假 urllib），保证封闭单测。
+"""
+from __future__ import annotations
+
+import argparse
+import os
+import sys
+import urllib.request
+import zipfile
+from pathlib import Path
+from typing import Any, Callable, Optional, Tuple
+
+if hasattr(sys.stdout, "reconfigure"):
+    sys.stdout.reconfigure(encoding="utf-8")
+    sys.stderr.reconfigure(encoding="utf-8")
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from runtime.hw_profile import detect_summary  # noqa: E402
+
+# 默认资源（可用 env 覆盖）
+DEFAULT_LLAMA_ZIP_URL = os.environ.get(
+    "LLAMA_ZIP_URL",
+    "https://github.com/ggml-org/llama.cpp/releases/download/b3662/llama-b3662-bin-win-vulkan-x64.zip",
+)
+DEFAULT_GGUF_URL = os.environ.get(
+    "GGUF_URL",
+    "https://hf-mirror.com/Qwen/Qwen3.5-4B-GGUF/resolve/main/qwen3.5-4b-q4_k_m.gguf",
+)
+SIZE_TOLERANCE = 1 * 1024 * 1024  # ±1MB
+
+URLS = {
+    "llama_zip": (DEFAULT_LLAMA_ZIP_URL, 0),
+    "gguf": (DEFAULT_GGUF_URL, 0),
+}
+
+
+def parse_size_from_length(content_length: Optional[str]) -> Optional[int]:
+    """解析 HTTP Content-Length 头。"""
+    if not content_length:
+        return None
+    try:
+        return int(content_length.strip())
+    except (ValueError, TypeError):
+        return None
+
+
+def validate_size(path: Path, expected: Optional[int],
+                  tolerance: int = SIZE_TOLERANCE) -> Tuple[bool, int]:
+    """校验文件大小与期望值偏差在容差内（expected 为 None/0 时仅返回存在性）。"""
+    actual = path.stat().st_size if path.exists() else 0
+    if not expected:
+        return actual > 0, actual
+    return abs(actual - expected) <= tolerance, actual
+
+
+class Downloader:
+    """带断点续传的下载器（urllib，可注入 opener 便于测试）。"""
+
+    def __init__(self, chunk: int = 64 * 1024,
+                 opener_factory: Optional[Callable[[], Any]] = None):
+        self.chunk = chunk
+        self._opener_factory = opener_factory
+
+    def _opener(self):
+        if self._opener_factory is not None:
+            return self._opener_factory()
+        return urllib.request.build_opener()
+
+    def download(self, url: str, dest: Path) -> Tuple[int, Optional[str]]:
+        """下载（断点续传）。返回 (bytes_written, error)。"""
+        dest.parent.mkdir(parents=True, exist_ok=True)
+        existing = dest.stat().st_size if dest.exists() else 0
+        headers = {"User-Agent": "v2-setup-runtime/1.0"}
+        if existing > 0:
+            headers["Range"] = f"bytes={existing}-"
+        opener = self._opener()
+        try:
+            req = urllib.request.Request(url, headers=headers)
+            with opener.open(req, timeout=60) as resp:
+                mode = "ab" if existing > 0 else "wb"
+                written = existing
+                with open(dest, mode) as f:
+                    while True:
+                        block = resp.read(self.chunk)
+                        if not block:
+                            break
+                        f.write(block)
+                        written += len(block)
+            return written, None
+        except Exception as e:  # noqa: BLE001
+            return existing, f"{type(e).__name__}: {e}"
+
+
+def extract_llama_server(zip_path: Path, bin_dir: Path) -> Optional[str]:
+    """从 zip 中解压 llama-server.exe 到 bin_dir。返回错误或 None。"""
+    try:
+        bin_dir.mkdir(parents=True, exist_ok=True)
+        with zipfile.ZipFile(zip_path) as zf:
+            target = None
+            for n in zf.namelist():
+                if n.lower().endswith("llama-server.exe"):
+                    target = n
+                    break
+            if target is None:
+                return "zip 中未找到 llama-server.exe"
+            dest = bin_dir / "llama-server.exe"
+            with zf.open(target) as src, open(dest, "wb") as out:
+                out.write(src.read())
+        return None
+    except Exception as e:  # noqa: BLE001
+        return f"解压失败: {type(e).__name__}: {e}"
+
+
+def manual_instructions() -> str:
+    return (
+        "网络下载失败。请手动准备：\n"
+        "  1. llama-server.exe：从 llama.cpp 官方 releases 下载 Windows Vulkan 版，放到 bin/\n"
+        "  2. GGUF 模型：从 hf-mirror.com 下载 qwen3.5-4b-q4_k_m.gguf，放到 models/\n"
+        "完成后重新运行 python scripts/serve.py 即可。"
+    )
+
+
+def main(config_path: Optional[str] = None) -> int:
+    from router_system.config import load_config
+    cfg = load_config(config_path)
+    runtime_cfg = cfg.get("runtime", {}).get("llama_server", {})
+    bin_dir = Path(runtime_cfg.get("binary", "bin/llama-server.exe")).parent
+    model_path = Path(runtime_cfg.get("model", "models/qwen3.5-4b-q4_k_m.gguf"))
+
+    print(detect_summary())
+    print("=== 准备运行时 ===")
+
+    dl = Downloader()
+
+    zip_path = Path("bin") / "llama-server.zip"
+    print(f"[1/2] 下载 llama-server -> {bin_dir / 'llama-server.exe'}")
+    _, err = dl.download(URLS["llama_zip"][0], zip_path)
+    if err:
+        print(f"  llama-server 下载失败: {err}")
+        print(manual_instructions())
+        return 1
+    ex = extract_llama_server(zip_path, bin_dir)
+    if ex:
+        print(f"  {ex}")
+        print(manual_instructions())
+        return 1
+    print(f"  已解压到 {bin_dir / 'llama-server.exe'}")
+
+    print(f"[2/2] 下载模型 -> {model_path}")
+    _, err2 = dl.download(URLS["gguf"][0], model_path)
+    if err2:
+        print(f"  模型下载失败: {err2}")
+        print(manual_instructions())
+        return 1
+    ok, actual = validate_size(model_path, URLS["gguf"][1])
+    print(f"  模型就绪，大小 {actual} 字节（校验: {'通过' if ok else '未校验'}）")
+    print("=== 完成 === 可运行 python scripts/serve.py 启动端云协同服务")
+    return 0
+
+
+if __name__ == "__main__":
+    ap = argparse.ArgumentParser(description="准备 v2 本地运行时")
+    ap.add_argument("--config", default=None, help="config 路径")
+    args = ap.parse_args()
+    sys.exit(main(args.config))
diff --git a/tests/test_setup_runtime.py b/tests/test_setup_runtime.py
new file mode 100644
index 0000000..de9d846
--- /dev/null
+++ b/tests/test_setup_runtime.py
@@ -0,0 +1,123 @@
+"""T11 setup_runtime 单测（封闭：假 opener / 假 zip）。"""
+import io
+import zipfile
+from pathlib import Path
+
+from scripts.setup_runtime import (
+    Downloader,
+    extract_llama_server,
+    manual_instructions,
+    parse_size_from_length,
+    validate_size,
+)
+
+
+class _FakeResp:
+    def __init__(self, data, status=200):
+        self._buf = io.BytesIO(data)
+        self.status = status
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *a):
+        return False
+
+    def read(self, n=-1):
+        return self._buf.read(n)
+
+
+class _FakeOpener:
+    def __init__(self, data=b"hello world"):
+        self.data = data
+        self.request_url = None
+        self.request_headers = {}
+
+    def __call__(self):
+        return self
+
+    def open(self, req, timeout=None):
+        self.request_url = req.full_url
+        self.request_headers = dict(req.headers)
+        return _FakeResp(self.data)
+
+
+def test_parse_size_from_length():
+    assert parse_size_from_length("1024") == 1024
+    assert parse_size_from_length(" 42 ") == 42
+    assert parse_size_from_length(None) is None
+    assert parse_size_from_length("abc") is None
+
+
+def test_validate_size(tmp_path):
+    p = tmp_path / "size.txt"
+    p.write_bytes(b"x" * (2 * 1024 * 1024))  # 2MB
+    ok, actual = validate_size(p, 2 * 1024 * 1024)
+    assert ok is True and actual == 2 * 1024 * 1024
+    ok, _ = validate_size(p, 100)  # 2MB vs 100 超出 ±1MB 容差
+    assert ok is False
+    ok, _ = validate_size(p, 0)  # expected=0 -> 仅存在性
+    assert ok is True
+
+
+def test_downloader_writes_file(tmp_path):
+    opener = _FakeOpener(b"ABCDEF")
+    dl = Downloader(chunk=2, opener_factory=lambda: opener)
+    dest = tmp_path / "out.bin"
+    written, err = dl.download("https://x/y", dest)
+    assert err is None
+    assert written == 6
+    assert dest.read_bytes() == b"ABCDEF"
+    assert opener.request_headers.get("Range") is None  # 无既有文件 -> 不带 Range
+
+
+def test_downloader_resumes(tmp_path):
+    opener = _FakeOpener(b"CDEF")
+    dl = Downloader(chunk=2, opener_factory=lambda: opener)
+    dest = tmp_path / "out.bin"
+    dest.write_bytes(b"AB")  # 既有 2 字节 -> 应带 Range: bytes=2-
+    written, err = dl.download("https://x/y", dest)
+    assert err is None
+    assert written == 6  # 2 + 4
+    assert dest.read_bytes() == b"ABCDEF"
+    assert opener.request_headers.get("Range") == "bytes=2-"
+
+
+def test_downloader_failure_returns_error(tmp_path):
+    class Boom:
+        def __call__(self):
+            return self
+
+        def open(self, req, timeout=None):
+            raise OSError("network down")
+
+    dl = Downloader(opener_factory=lambda: Boom())
+    dest = tmp_path / "out.bin"
+    written, err = dl.download("https://x/y", dest)
+    assert err is not None
+    assert "OSError" in err
+
+
+def test_extract_llama_server(tmp_path):
+    zip_path = tmp_path / "llama.zip"
+    bin_dir = tmp_path / "bin"
+    with zipfile.ZipFile(zip_path, "w") as zf:
+        zf.writestr("llama-b3662/bin/llama-server.exe", b"MZfake")
+        zf.writestr("llama-b3662/README.md", "readme")
+    err = extract_llama_server(zip_path, bin_dir)
+    assert err is None
+    assert (bin_dir / "llama-server.exe").exists()
+
+
+def test_extract_missing_exe(tmp_path):
+    zip_path = tmp_path / "no.exe.zip"
+    with zipfile.ZipFile(zip_path, "w") as zf:
+        zf.writestr("a.txt", "x")
+    err = extract_llama_server(zip_path, tmp_path / "bin")
+    assert err is not None
+    assert "未找到" in err
+
+
+def test_manual_instructions_nonempty():
+    s = manual_instructions()
+    assert "llama-server" in s and "GGUF" in s
diff --git a/任务拆解与执行计划.md b/任务拆解与执行计划.md
index 8b01f73..12933f3 100644
--- a/任务拆解与执行计划.md
+++ b/任务拆解与执行计划.md
@@ -77,7 +77,7 @@ P0 完成后的能力：干净的后端抽象 + 可量化的评测 + 可追溯
 | T8 | 人工检验队列 ReviewQueue | ✅ 完成 | T8 |
 | T9 | token 计量与账单 | ✅ 完成 | T9 |
 | T10 | rollup + prefix cache 调优 | ✅ 完成 | T10 |
-| T11 | 打包分发 setup_runtime.py | ⬜ | |
+| T11 | 打包分发 setup_runtime.py | ✅ 完成 | T11 |
 | T12 | 实验脚本 bench_tokens.py + 数据集 | ⬜ | |
 | T13 | E1–E5 跑数到 research/v2_experiments/ | ⬜ | |
 | T14 | 文档收口（README v2 改写） | ⬜ | |