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- decisions-summary.md:新增「KBDB 鐵律 + API-as-Wall」「安裝契約」; 修正過時兩條(「共用 D1 掛載」改 API;「萬物皆 Block v3」標已淘汰/違規殘留已刪) - 新增 ADR docs/2-architecture/decisions/0001-api-as-wall.md Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>