diff --git a/_AI_USAGE_LOG.md b/_AI_USAGE_LOG.md
index 8979df7..f500b45 100644
--- a/_AI_USAGE_LOG.md
+++ b/_AI_USAGE_LOG.md
@@ -103,3 +103,5 @@
 | 2026-08-13 | 测试验证 | Phase5 T14 QA 闭环 QALoop（仅重失败章） | src/genesis/qa/qa_loop.py; tests/test_phase5_qa_loop.py | gstack-subagent |
 | 2026-08-13 | 测试验证 | Phase5 T15 端到端 e2e + DocxInjector 真实接口对齐（inject/sections） | tests/test_phase5_e2e.py; src/genesis/writer/docx_injector.py | gstack-subagent |
 | 2026-08-13 | 文档规范 | Phase5 T16 design.md 追加 Phase 5 Writer/QA 子系统章节 + 日志补齐 | docs/design.md; _AI_USAGE_LOG.md | gstack-subagent |
+
+| 2026-08-13 23:11 | Agent 实现 | 接通真实 LLM 引擎工厂（P5-T10 门禁接线）：新增 inference/factory.py，orchestrator/qa_loop 接入，脚本校验适配，补工厂测试 | src/genesis/inference/factory.py; src/genesis/writer/orchestrator.py; src/genesis/qa/qa_loop.py; scripts/run_phase5_slice.py; tests/test_inference_factory.py | hy3-free |
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