From 532189b618baf4071b5475b6d298a60aff3a18f8 Mon Sep 17 00:00:00 2001
From: tiye <jiyinyiyong@gmail.com>
Date: Wed, 2 Sep 2026 16:48:27 +0800
Subject: [PATCH] fix: keep updater store boundary nominal

---
 calcit.cirru                                  |  3 +--
 history/202609021755-static-store-boundary.md | 13 +++++++++++++
 2 files changed, 14 insertions(+), 2 deletions(-)
 create mode 100644 history/202609021755-static-store-boundary.md

diff --git a/calcit.cirru b/calcit.cirru
index 358740f..dc5ee45 100644
--- a/calcit.cirru
+++ b/calcit.cirru
@@ -2308,8 +2308,7 @@
           :code $ quote
             defn updater (raw-store op op-id op-time)
               let
-                  store $ if (struct? raw-store) (unsafe-coerce raw-store 'app.schema/Store)
-                    decode-map-as (dissoc raw-store :current-chapter-id) 'app.schema/Store
+                  store raw-store
                 match op
                   (:states cursor s)
                     assoc store :states $ assoc-in (:states store)
diff --git a/history/202609021755-static-store-boundary.md b/history/202609021755-static-store-boundary.md
new file mode 100644
index 0000000..18f5ecb
--- /dev/null
+++ b/history/202609021755-static-store-boundary.md
@@ -0,0 +1,13 @@
+# Keep the updater Store boundary static / 保持 updater 的 Store 静态边界
+
+## English
+
+- Stop re-decoding `raw-store` inside `app.updater/updater`; its declared input is already the nominal `Store` used by Reel.
+- Keep `decode-map-as` at the actual external storage hydration boundary, where legacy persisted maps still enter the typed application.
+- Prevent the newer compiler from rejecting a Struct value passed back through a Map decoder while preserving legacy-session migration behavior.
+
+## 中文
+
+- `app.updater/updater` 不再二次 decode `raw-store`；其声明输入已经是 Reel 使用的 nominal `Store`。
+- `decode-map-as` 继续保留在真实的外部存储 hydration 边界，用于旧持久化 Map 进入类型化应用时的迁移。
+- 避免新版编译器拒绝把 Struct 再次送入 Map decoder，同时保持 legacy session 的迁移行为。