From a5e6490d57e7633f694b3492e15b66a90cda9693 Mon Sep 17 00:00:00 2001
From: bingshuo <565183519@qq.com>
Date: Thu, 21 May 2026 17:43:09 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20add=20system=5Fcausal=5Fchains=20table?=
 =?UTF-8?q?=20[D109]=20Layer=201=20causal=20chains=20from=20=E5=86=B0?=
 =?UTF-8?q?=E6=9C=94=E5=8E=9F=E8=AF=9D?=
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---
 .../schema/07-system-causal-chains.sql        | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 persona-brain-db/schema/07-system-causal-chains.sql

diff --git a/persona-brain-db/schema/07-system-causal-chains.sql b/persona-brain-db/schema/07-system-causal-chains.sql
new file mode 100644
index 0000000..3fb1973
--- /dev/null
+++ b/persona-brain-db/schema/07-system-causal-chains.sql
@@ -0,0 +1,22 @@
+-- ============================================================
+-- 表7：system_causal_chains（Layer 1 · 因果链表）
+-- 用途：存储从冰朔原话到工程落点的完整推导链
+-- 每条决策都有从冰朔原话到工程落点的完整因果链条
+-- ============================================================
+
+CREATE TABLE IF NOT EXISTS system_causal_chains (
+  chain_id          VARCHAR(32)   PRIMARY KEY,
+  title             VARCHAR(256)  NOT NULL,
+  description       TEXT,
+  ice_original      TEXT          NOT NULL,      -- 冰朔原话
+  engineering_path  TEXT          NOT NULL,      -- 工程落点
+  verification      TEXT,                         -- 验证方式
+  status            VARCHAR(16)   NOT NULL DEFAULT 'active'
+                    CHECK (status IN ('active', 'deprecated')),
+  version           VARCHAR(16)   NOT NULL,
+  created_at        TIMESTAMP     NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at        TIMESTAMP     NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX IF NOT EXISTS idx_scc_status ON system_causal_chains(status);
+CREATE INDEX IF NOT EXISTS idx_scc_version ON system_causal_chains(version);