From aeab93a1316639c9c298ff9ec72ebba6eed6b383 Mon Sep 17 00:00:00 2001
From: "zhanghang.heal" <zhanghang.heal@bytedance.com>
Date: Mon, 20 Oct 2025 19:22:14 +0800
Subject: [PATCH 1/2] fix(runtime-core): register share if not registered

---
 .changeset/friendly-oranges-drop.md       | 5 +++++
 packages/runtime-core/src/shared/index.ts | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/friendly-oranges-drop.md

diff --git a/.changeset/friendly-oranges-drop.md b/.changeset/friendly-oranges-drop.md
new file mode 100644
index 00000000000..a0ce319237a
--- /dev/null
+++ b/.changeset/friendly-oranges-drop.md
@@ -0,0 +1,5 @@
+---
+'@module-federation/runtime-core': patch
+---
+
+fix(runtime-core): register share if not registered
diff --git a/packages/runtime-core/src/shared/index.ts b/packages/runtime-core/src/shared/index.ts
index a1c24b6ce2a..606f9c5e55d 100644
--- a/packages/runtime-core/src/shared/index.ts
+++ b/packages/runtime-core/src/shared/index.ts
@@ -89,7 +89,7 @@ export class SharedHandler {
           sharedVal,
           this.hooks.lifecycle.resolveShare,
         );
-        if (!registeredShared && sharedVal && sharedVal.lib) {
+        if (!registeredShared) {
           this.setShared({
             pkgName: sharedKey,
             lib: sharedVal.lib,

From b9485ef4ea64c1d21e8e247bf8495083a9c98624 Mon Sep 17 00:00:00 2001
From: "zhanghang.heal" <zhanghang.heal@bytedance.com>
Date: Mon, 3 Nov 2025 10:37:26 +0800
Subject: [PATCH 2/2] chore: fix ut

---
 packages/runtime-core/src/shared/index.ts | 31 ++++++++++-------------
 1 file changed, 14 insertions(+), 17 deletions(-)

diff --git a/packages/runtime-core/src/shared/index.ts b/packages/runtime-core/src/shared/index.ts
index 606f9c5e55d..8209f0df35b 100644
--- a/packages/runtime-core/src/shared/index.ts
+++ b/packages/runtime-core/src/shared/index.ts
@@ -83,22 +83,19 @@ export class SharedHandler {
     sharedKeys.forEach((sharedKey) => {
       const sharedVals = shareInfos[sharedKey];
       sharedVals.forEach((sharedVal) => {
-        const registeredShared = getRegisteredShare(
-          this.shareScopeMap,
-          sharedKey,
-          sharedVal,
-          this.hooks.lifecycle.resolveShare,
-        );
-        if (!registeredShared) {
-          this.setShared({
-            pkgName: sharedKey,
-            lib: sharedVal.lib,
-            get: sharedVal.get,
-            loaded: true,
-            shared: sharedVal,
-            from: userOptions.name,
-          });
-        }
+        sharedVal.scope.forEach((sc) => {
+          const registeredShared = this.shareScopeMap[sc]?.[sharedKey];
+          if (!registeredShared) {
+            this.setShared({
+              pkgName: sharedKey,
+              lib: sharedVal.lib,
+              get: sharedVal.get,
+              loaded: sharedVal.loaded || Boolean(sharedVal.lib),
+              shared: sharedVal,
+              from: userOptions.name,
+            });
+          }
+        });
       });
     });
 
@@ -496,7 +493,7 @@ export class SharedHandler {
       if (!this.shareScopeMap[sc][pkgName][version]) {
         this.shareScopeMap[sc][pkgName][version] = {
           version,
-          scope: ['default'],
+          scope: [sc],
           ...shareInfo,
           lib,
           loaded,