diff --git a/wg1/gen-worker/gamedef_quickcheck.py b/wg1/gen-worker/gamedef_quickcheck.py
new file mode 100644
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+++ b/wg1/gen-worker/gamedef_quickcheck.py
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+"""gamedef_quickcheck.py —— plan 2026-06-18-001 U3 gamedef 路 lili-mac 快走查（cutover 门早读）。
+
+run.py 的 gamedef 版:把 generate(iife) → validate(静态) 换成
+  generate(GAMEDEF_SYSTEM) → build-from-source.mjs(校验 schema/引用/静态扫描 + 装配出工厂)，
+其余(scaffold/build/play 九门)复用 run.py（harness 零改）。
+
+GAMEDEF_SYSTEM **从后端 SaaPrompts.java 抽取**（drift-free：跑的就是后端真用的 prompt）。
+模型/网关/代理旁路复用 _client；play-spec/brief 复用现有 briefs/*.json（gatespec driver 同口径）。
+
+用法：.venv/bin/python gamedef_quickcheck.py runner flappy whack pong   # 默认这 4
+仅 lili-mac 快走查（小样早读）；authoritative ≥60% cutover 门在 mini-desktop（SaaFullGraphE2eTest）。
+密钥经 _client 读 .env，绝不打印。
+"""
+import json
+import re
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent))
+from worker import _client, run  # noqa: E402  复用 chat + scaffold/build/play
+
+REPO_ROOT = Path(__file__).resolve().parents[2]
+SAA_PROMPTS = (REPO_ROOT / "game-cloud/game-module-aigc/game-module-aigc-server/src/main/java/"
+               "com/wanxiang/huijing/game/module/aigc/saa/SaaPrompts.java")
+GAME_RUNTIME = REPO_ROOT / "game-runtime"
+GEN_DIR = GAME_RUNTIME / "games" / "_wg1-gen"
+BRIEFS = Path(__file__).resolve().parent / "briefs"
+
+
+def extract_gamedef_system():
+    """从 SaaPrompts.java 抽 GAMEDEF_SYSTEM 文本块（去 Java 文本块 12 空格缩进）。"""
+    java = SAA_PROMPTS.read_text(encoding="utf-8")
+    m = re.search(r'GAMEDEF_SYSTEM = """\n(.*?)\n\s*""";', java, re.DOTALL)
+    if not m:
+        raise RuntimeError("未能从 SaaPrompts.java 抽取 GAMEDEF_SYSTEM")
+    lines = [(ln[12:] if ln.startswith(" " * 12) else ln) for ln in m.group(1).split("\n")]
+    return "\n".join(lines)
+
+
+def extract_json_obj(content):
+    """从模型输出抠最外层 {...}（去 ```json 围栏/前后说明）。"""
+    s = content.strip()
+    s = re.sub(r"^```(?:json)?\s*", "", s)
+    s = re.sub(r"\s*```$", "", s)
+    lo, hi = s.find("{"), s.rfind("}")
+    if lo < 0 or hi <= lo:
+        return None
+    try:
+        return json.loads(s[lo:hi + 1])
+    except Exception:
+        return None
+
+
+def assemble_via_cli(game_id, gamedef_obj):
+    """写 source.json → 跑 build-from-source.mjs 校验+装配 → generated-factory.js。返回 (ok, err)。"""
+    gdir = GEN_DIR / game_id
+    gdir.mkdir(parents=True, exist_ok=True)
+    src = gdir / "source.json"
+    src.write_text(json.dumps(gamedef_obj, ensure_ascii=False), encoding="utf-8")
+    r = subprocess.run(
+        ["node", "src/host/build-from-source.mjs", str(src), str(gdir / "generated-factory.js")],
+        cwd=str(GAME_RUNTIME), capture_output=True, text=True, timeout=60,
+    )
+    return r.returncode == 0, (r.stdout + r.stderr).strip()
+
+
+def run_one(game_id, gamedef_system, model):
+    brief_text, play_spec = run._load_brief(game_id)
+    user = "请为下面这款游戏产出一份 gameDefinition（只输出一个 JSON 对象，不要 ```代码块、不要解释）：\n\n" + brief_text
+    gid = "gd-" + game_id
+    out = {"game_id": gid, "stage": None, "pass": False, "guards": {}, "err": ""}
+    try:
+        resp = _client.chat(model, gamedef_system, user, max_tokens=16000)
+    except Exception as e:
+        out["stage"] = "generate"; out["err"] = str(e)[:200]; return out
+    out["tokens"] = (resp.get("prompt_tokens"), resp.get("completion_tokens"))
+    gd = extract_json_obj(resp["content"])
+    if gd is None:
+        out["stage"] = "parse"; out["err"] = "未解析出 gameDefinition JSON"; return out
+    ok, err = assemble_via_cli(gid, gd)
+    if not ok:
+        out["stage"] = "validate/assemble"; out["err"] = err[:400]; return out
+    # 复用 run.py 的 scaffold 余下（拷模板 + play-spec）+ build + play（factory 已由 CLI 写好）。
+    gdir = GEN_DIR / gid
+    shutil.copyfile(GEN_DIR / "_shared" / "entry-bundle.template.js", gdir / "entry-bundle.js")
+    shutil.copyfile(GEN_DIR / "_shared" / "index.template.html", gdir / "index.html")
+    (gdir / "play-spec.json").write_text(json.dumps(play_spec, ensure_ascii=False, indent=2), encoding="utf-8")
+    bok, blog = run.build(gid)
+    if not bok:
+        out["stage"] = "build"; out["err"] = blog[:400]; return out
+    rc, _, verdict = run.play(gid)
+    out["stage"] = "play"
+    out["guards"] = {k: g.get("pass") for k, g in ((verdict or {}).get("guards") or {}).items()}
+    out["pass"] = bool(rc == 0 and verdict and verdict.get("pass"))
+    if not out["pass"]:
+        out["err"] = run._verdict_feedback(verdict)[:300]
+    return out
+
+
+def main():
+    games = sys.argv[1:] or ["runner", "flappy", "whack", "pong"]
+    model = _client.DEFAULT_MODEL
+    gds = extract_gamedef_system()
+    print(f"[gamedef-qc] model={model}  games={games}  GAMEDEF_SYSTEM={len(gds)}字  (extracted from SaaPrompts.java)\n")
+    results = []
+    for g in games:
+        r = run_one(g, gds, model)
+        results.append(r)
+        mark = "✅ PASS" if r["pass"] else f"❌ {r['stage']}"
+        gpass = sum(1 for v in r["guards"].values() if v)
+        gtot = len(r["guards"])
+        print(f"  {r['game_id']:14s} {mark:16s} gates={gpass}/{gtot}  {('' if r['pass'] else r['err'][:120])}")
+    npass = sum(1 for r in results if r["pass"])
+    print(f"\n[gamedef-qc] 过门 {npass}/{len(results)}  (cutover 门基线=iife 60%; 本为 lili-mac 小样早读, authoritative=mini-desktop)")
+    Path(__file__).resolve().parent.joinpath("results", "gamedef-quickcheck.json").write_text(
+        json.dumps(results, ensure_ascii=False, indent=2), encoding="utf-8")
+    sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()