三面拆分⑫:网关去节点化 —— 分支即条件出边,汇合即多入边异或

模型(与 Mastra .branch 同构,条件挂在步与步之间):
- routing.selectEdges:多出边一律异或,不分节点种类 —— 条件命中优先(按声明序),
  无条件边作默认兜底,恰取一条;单出边直通保留(历史并行网关的遗留通道)
- closure:含网关即 gateway-deprecated(历史版本仅可读、不可激活);
  「隐式合并」禁令删除(多入边=异或汇合,上游互斥无歧义);
  新规:多出边节点的无条件边至多一条,超出报 multi-default-edge
- contracts:CLOSURE_VIOLATION_KINDS 去 gateway-unbalanced/join-ambiguous-source,
  进 multi-default-edge/gateway-deprecated(下游零引用,api-report 随行)

种子(按用户要求:只留一条流一个版本,图/节点/边全部对账):
- MVP_PACKAGE 重写:10 节点 14 边零网关 —— G1/G2 展开为 A1 的三条出边
  (选型/直接寻源/默认直接定价)+ A2 的两条,G2J/G3 整颗删除,
  A5 审批点的两个去向就是自己的两条 verdict 条件出边(驳回边与 reject 声明字字对齐)
- 手绘图:顶车道 y30 补画 A1→A3「直接寻源」—— 画布保存只认画出来的边,
  不画这条语义边会在首次存盘被静默丢掉(新增图边对账测试卡死这类漏画);
  「供应商底价表」标注钉进 y190 车道空档,不再被卡点压住
- 开发库外科手术:清运行数据 + 删 v1–v4,重种为唯一生效版 v1(闭合过闸)

UI 与文案同步:
- 元素盘/追加盘不再有网关件(画布仍认得历史图);图例删「判断/并行网关」「菱形=网关」
- 新建流程补激活一跳(保存不生效模型下,不激活「建出来就能起单」就是谎言)
- 总览四种编排要素、「画图不检查,激活才查完整」贯穿 blueprint/memory/process 文案

测试:closure 43 通过(gateway-deprecated + multi-default-edge 两用例),
seed-mvp-flow 8 通过(含图边对账),端到端八例真库全绿(网关从不建实例,断言原样存活);
五闸 typecheck/lint/depcruise/api:check/test 全过(退出码验)。

债:M5-4 AND 并行待「并行组」声明(Mastra .parallel);M5-5 网关运行时兼容三处,
含网关在途流清零后随 schema 一并摘除。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KeDBx2PHLavbURXB8LJJ7m

api-report/packages/contracts/src/api/governance.d.ts

@@ -1051,8 +1051,8 @@ export declare const saveProcessRoute: {
                     "required-unmapped": "required-unmapped";
                     "type-conflict": "type-conflict";
                     "dangling-node": "dangling-node";
-                    "gateway-unbalanced": "gateway-unbalanced";
-                    "join-ambiguous-source": "join-ambiguous-source";
+                    "multi-default-edge": "multi-default-edge";
+                    "gateway-deprecated": "gateway-deprecated";
                     "tolerate-required-dependency": "tolerate-required-dependency";
                     "unknown-activity": "unknown-activity";
                     "missing-owner-position": "missing-owner-position";
@@ -1481,8 +1481,8 @@ export declare const validateProcessRoute: {
                 "required-unmapped": "required-unmapped";
                 "type-conflict": "type-conflict";
                 "dangling-node": "dangling-node";
-                "gateway-unbalanced": "gateway-unbalanced";
-                "join-ambiguous-source": "join-ambiguous-source";
+                "multi-default-edge": "multi-default-edge";
+                "gateway-deprecated": "gateway-deprecated";
                 "tolerate-required-dependency": "tolerate-required-dependency";
                 "unknown-activity": "unknown-activity";
                 "missing-owner-position": "missing-owner-position";