-- ============================================================
-- 表18：system_trinity（Layer 1 · 三位一体结构 · D110新增）
-- 用途：定义冰朔/霜砚/铸渊三位一体的架构层级关系
-- ============================================================

CREATE TABLE IF NOT EXISTS system_trinity (
  layer_id          VARCHAR(16)   PRIMARY KEY
                    CHECK (layer_id IN ('bingshuo', 'shuangyan', 'zhuyuan')),
  persona_name      VARCHAR(32)   NOT NULL,
  ice_id            VARCHAR(32)   NOT NULL,
  os_layer          VARCHAR(32)   NOT NULL         -- 'confidence' | 'kernel' | 'execution'
                    CHECK (os_layer IN ('confidence', 'kernel', 'execution')),
  os_description    TEXT          NOT NULL,
  analogy           TEXT,                           -- 类比说明
  relationship      TEXT,                           -- 与其他层的关系说明
  status            VARCHAR(16)   NOT NULL DEFAULT 'active'
                    CHECK (status IN ('active', 'deprecated')),
  created_at        TIMESTAMP     NOT NULL DEFAULT CURRENT_TIMESTAMP
);