MemRelay/projects/d401bdbe-e9c0-4de8-aa0f-48b983de7c80/curated/UTU 已确认决策.md

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UTU 已确认决策	curated	main/projects/d401bdbe-e9c0-4de8-aa0f-48b983de7c80/curated/utu-已确认决策	626d0811-d35d-4f25-8d0c-e93f994fe6f0	project	d401bdbe-e9c0-4de8-aa0f-48b983de7c80	development	null	development	decisions	1	2b1ec63f-c259-43c3-9df3-9e571c1e2cc1 be959d28-f0c6-4e40-b550-7db4d3234602	088d6f24-caa7-4e04-b216-e6bd12c2b7b6 60d90c85-e1f9-46da-af79-625c491541f8	1dcd7ed9-6f47-4c23-a37d-9131ef1a551c checkpoint:60d90c85-e1f9-46da-af79-625c491541f8 file:1dcd7ed9-6f47-4c23-a37d-9131ef1a551c memory:2b1ec63f-c259-43c3-9df3-9e571c1e2cc1 memory:be959d28-f0c6-4e40-b550-7db4d3234602	null		utu-20260910-chat-storage-curation-01	Sub2API	git-restore	27	memory:3be32895-a3f0-47c5-8338-845a95c7271e memory:bca7c991-5eaa-4b05-9694-ce71dac93a5e memory:6710d22f-fe2b-4d09-b266-504e3c52cca8 memory:d55c5ff5-6c2a-40a8-bf81-03a83e78fff9 1 1 1 1	processed unchanged unsupported skipped 27 0 0 0	curated_baseline:626d0811-d35d-4f25-8d0c-e93f994fe6f0 memory:3be32895-a3f0-47c5-8338-845a95c7271e memory:bca7c991-5eaa-4b05-9694-ce71dac93a5e memory:6710d22f-fe2b-4d09-b266-504e3c52cca8 memory:d55c5ff5-6c2a-40a8-bf81-03a83e78fff9	curated_baseline:626d0811-d35d-4f25-8d0c-e93f994fe6f0				551	51232dc5987856310695767b128058622b282fcb65a16681a6af25f086440b64	2026-08-12.3	3	null	2026-09-09T10:29:04.278256+00:00	2026-09-23T15:06:17.493878+00:00	决策 关键	6a6a895eaf

UTU 关键决策

• 服务器中转（SYS‑06）：所有业务数据通过服务器中转，客户端之间不使用 P2P 直连。
• 端到端加密（SEC‑01）：发送端加密，接收端解密；服务器仅转发密文。
• 元数据可见性（SEC‑06、SEC‑07）：服务器可见连接时间、IP、成员关系等，断开后不得永久保留。
• KISS & YAGNI：遵循最简正确实现，复用现有框架，避免为未来假设需求添加依赖。

以上决策均基于用户确认的业务需求，并在后续决策文档中得到确认。