diff --git a/knowledge/repos/vllm-omni/components/model-executor/_index.md b/knowledge/repos/vllm-omni/components/model-executor/_index.md
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--- a/knowledge/repos/vllm-omni/components/model-executor/_index.md
+++ b/knowledge/repos/vllm-omni/components/model-executor/_index.md
@@ -73,3 +73,4 @@ sources: []
 - [Host Weight Runtime 测试评审规则](rules-host-weight-runtime.md)
 - [模型执行器 — Qwen2.5-Omni talker 终止 conditioning 规则](rules-qwen25-talker-eos.md)
 - [Drama 3 量化配置规则](rules-drama3-quant.md)
+- [模型执行器 — GPU 显存预算规则](rules-gpu-memory-budget.md)
diff --git a/knowledge/repos/vllm-omni/components/model-executor/rules-gpu-memory-budget.md b/knowledge/repos/vllm-omni/components/model-executor/rules-gpu-memory-budget.md
new file mode 100644
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@@ -0,0 +1,20 @@
+---
+title: "模型执行器 — GPU 显存预算规则"
+created: 2026-10-26
+updated: 2026-10-26
+type: rule
+tags: [vllm-omni, components, model-executor]
+sources: ["PR #9404"]
+---
+
+# 模型执行器 — GPU 显存预算规则
+
+## VLLM-OMNI-PR9404-IGPU-BUDGET — 集成 GPU 必须拒绝超量 stage 显存预算
+
+- 触发：改动 `vllm_omni/worker/memory_utils.py` 的 `request_memory_tolerant()` 或 `tests/worker/test_memory_utils.py`，尤其是 `MemorySnapshot`、`CacheConfig.gpu_memory_utilization`、`current_platform.is_integrated_gpu` 相关分支。
+- 强制：集成 GPU（`current_platform.is_integrated_gpu(init_snapshot.device_.index)` 为真）必须走上游 `request_memory()` 校验路径，预算超过空闲显存时抛出 `ValueError`（报错含 "Decrease GPU memory utilization"）；离散 GPU 保留现有“钳制到 free_memory 并打告警”的容忍行为。设备判断必须使用快照中的设备索引。
+- 禁止：在集成 GPU 上把预算静默钳制成全部空闲共享主机内存，导致宿主机无内存余量（Jetson 上表现为整机无响应）；禁止用默认设备代替快照设备做集成 GPU 判定。
+- 验收：纯 CPU 测试（monkeypatch `is_integrated_gpu`，构造真实 `MemorySnapshot(total_memory=…, free_memory=…, device=…, auto_measure=False)` 与 `CacheConfig`）覆盖：集成 GPU 空闲不足时抛错（含 free=0 与仅差 1 字节）、预算充足时按 `math.ceil(total*util)` 原样返回（含预算==空闲边界）、离散 GPU 仍钳制到 free_memory。
+- 证据：^[PR #9404] 集成 GPU（Jetson AGX Thor 运行 Qwen2.5-Omni-3B）上钳制后的预算吃掉全部共享主机内存导致系统无响应，本 PR 改为上游校验直接报错。
+
+<!-- kb:rule status=active since=v0.30.0 -->