From d341e6df212787742b654a86e04d207697b34705 Mon Sep 17 00:00:00 2001
From: weichen <weichen@local>
Date: Wed, 30 Sep 2026 03:18:51 +0000
Subject: [PATCH 1/3] Record the task card for fix-empty-list-json

---
 .task/fix-empty-list-json.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 .task/fix-empty-list-json.md

diff --git a/.task/fix-empty-list-json.md b/.task/fix-empty-list-json.md
new file mode 100644
index 00000000..20d26a83
--- /dev/null
+++ b/.task/fix-empty-list-json.md
@@ -0,0 +1,25 @@
+# fix/empty-list-json 任务卡
+
+任务主记录：<PR 链接，task-finish 时填写>；状态：进行中；owner：weichen
+
+## 基线与授权
+
+- 权威仓：ssh://git@git-ssh.u1680832.nyat.app:31411/weichen/Agent-System-Dev.git；目标分支：main；R0（initial_base_sha）= 923591feda367bc8ceaf809ed7c294e5245a3a3a
+- 工作区：/home/weichen/projects/Agent-System-Dev-wt-fix-empty-list-json（worktree）；分支：fix/empty-list-json
+- 授权与交付终点：<本次允许的动作与终点；未授权事项写明>
+
+## 目标与非目标
+
+<预期结果、受影响入口/模块/契约；明确不做什么。>
+
+## 同步记录
+
+| 节点 | sync_base_sha | tested_head_sha | checked_at |
+|---|---|---|---|
+| 启动 | 923591feda367bc8ceaf809ed7c294e5245a3a3a | 923591feda367bc8ceaf809ed7c294e5245a3a3a | 2026-09-30T03:18:51Z |
+
+## 结果与验证（完成后填写）
+
+- 结果：
+- 验证：
+- 影响与剩余项：
-- 
2.54.0


From 3366148dcf660148c58dff8ec56e02d80604c7a0 Mon Sep 17 00:00:00 2001
From: weichen <weichen@local>
Date: Wed, 30 Sep 2026 03:22:48 +0000
Subject: [PATCH 2/3] Advance the backend gitlink with the empty-list
 serialization fix

Why: the backend store List* functions encoded empty results as JSON null,
which crashed the frontend nav (.map on null) on any newly created project.
Evidence: backend go test all packages pass; store regression
TestEmptyListsSerializeAsEmptyArrays asserts [] for empty lists.
Impact: parent pins backend at the serialization fix plus the core-pin
build-blocker advance.
Refs: .task/fix-empty-list-json.md
---
 modules/backend | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/backend b/modules/backend
index 99fb59bd..72e6ce66 160000
--- a/modules/backend
+++ b/modules/backend
@@ -1 +1 @@
-Subproject commit 99fb59bdc26bfe725475262d6657504b7bac6f41
+Subproject commit 72e6ce66b4c6591dbf7c64b42808af5e0a4ea378
-- 
2.54.0


From 4d380e5fb2307e7bf9bc7d2945cac2570ccd7bc1 Mon Sep 17 00:00:00 2001
From: weichen <weichen@local>
Date: Wed, 30 Sep 2026 03:23:31 +0000
Subject: [PATCH 3/3] Record the sync checkpoint

---
 .task/delivery-mechanism.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.task/delivery-mechanism.md b/.task/delivery-mechanism.md
index 872a0790..bb02a572 100644
--- a/.task/delivery-mechanism.md
+++ b/.task/delivery-mechanism.md
@@ -23,3 +23,4 @@
 
 - 验证：临时真实仓库正负例 19/19 PASS（precheck 三态/start 拒绝与建立/hook 三类拒绝与放行/sync/finish 回收与 abandon 双确认）；完整输出见任务执行记录。
 | 同步前验收 | 3092715bf68bc4cefb6515c157cd90cf9b5cba2e | f31fd5f62d3dd09780689e53f16c7da94215cbd1 | 2026-09-30T03:12:18Z |
+| 同步前验收 | 923591feda367bc8ceaf809ed7c294e5245a3a3a | 3366148dcf660148c58dff8ec56e02d80604c7a0 | 2026-09-30T03:23:31Z |
-- 
2.54.0