diff --git a/apps/ai-game-creator-shell/scripts/build-release.test.mjs b/apps/ai-game-creator-shell/scripts/build-release.test.mjs
index ffc8bb8b2..798bd206f 100644
--- a/apps/ai-game-creator-shell/scripts/build-release.test.mjs
+++ b/apps/ai-game-creator-shell/scripts/build-release.test.mjs
@@ -1,4 +1,5 @@
 import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
 import { test } from 'node:test';
 
 import {
@@ -46,3 +47,14 @@ test('next release version follows the higher local or OSS version', () => {
   assert.equal(nextPatchVersion('0.1.18', '0.1.15'), '0.1.19');
   assert.equal(nextPatchVersion('0.1.12', null), '0.1.13');
 });
+
+test('release upload forces overwrite for versioned artifact and latest pointer', () => {
+  const source = readFileSync(
+    new URL('./release-upload.mjs', import.meta.url),
+    'utf8',
+  );
+  assert.equal(
+    (source.match(/runOssutil\(\['cp', '--force'/gu) ?? []).length,
+    2,
+  );
+});
diff --git a/apps/ai-game-creator-shell/scripts/release-upload.mjs b/apps/ai-game-creator-shell/scripts/release-upload.mjs
index e2085345a..ee5af4452 100644
--- a/apps/ai-game-creator-shell/scripts/release-upload.mjs
+++ b/apps/ai-game-creator-shell/scripts/release-upload.mjs
@@ -40,7 +40,9 @@ await prepareReleaseVersion();
 runTauriBuild([]);
 const { artifact, manifestPath, manifest } = generateUpdateManifest();
 const artifactKey = `agc/${manifest.version}/${path.basename(artifact)}`;
-runOssutil(['cp', artifact, `oss://${bucket}/${artifactKey}`]);
-runOssutil(['cp', manifestPath, `oss://${bucket}/agc/latest.json`]);
+// Jenkins/ossutil 默认会在目标对象已存在时交互询问并按默认值跳过；
+// 发布清单是固定的 latest 指针，必须显式覆盖，否则流水线会误报成功但远端仍保留旧版本。
+runOssutil(['cp', '--force', artifact, `oss://${bucket}/${artifactKey}`]);
+runOssutil(['cp', '--force', manifestPath, `oss://${bucket}/agc/latest.json`]);
 console.log(`[ai-game-creator-shell] 已上传 oss://${bucket}/${artifactKey}`);
 console.log(`[ai-game-creator-shell] 已上传 oss://${bucket}/agc/latest.json`);
diff --git a/docs/technical/【技术方案】AGC客户端更新检查与下载-2026-08-31.md b/docs/technical/【技术方案】AGC客户端更新检查与下载-2026-08-31.md
index a5e11496c..455c37670 100644
--- a/docs/technical/【技术方案】AGC客户端更新检查与下载-2026-08-31.md
+++ b/docs/technical/【技术方案】AGC客户端更新检查与下载-2026-08-31.md
@@ -40,7 +40,7 @@ Windows x64），通过 `AGC_UPDATE_ARTIFACT` 指定要发布的安装包，通
 OSS 前缀，通过 `AGC_RELEASE_VERSION` 指定三段版本号（仅在明确需要复现指定版本时使用），通过
 `AGC_UPDATE_RELEASE_NOTES` 写入发布说明；`--no-bundle` smoke 构建不会读取 OSS、修改版本或生成清单。
 
-每次发布安装包上传完成后，再上传同一目录生成的 `latest.json`，确保 `downloadUrl` 指向已存在的 OSS 对象；清单和安装包均使用公开可读对象，不在清单中保存凭据、签名或本地路径。构建脚本本身不负责上传 OSS，发布流水线通过 `release:upload` 完成上传。
+每次发布安装包上传完成后，再使用 ossutil 的 `--force` 覆盖上传同一目录生成的 `latest.json`，确保固定的 latest 指针和 `downloadUrl` 指向已存在的 OSS 对象；未显式强制覆盖时，ossutil 在目标已存在时会交互询问并按默认值跳过，不能作为 Jenkins 非交互发布方式。清单和安装包均使用公开可读对象，不在清单中保存凭据、签名或本地路径。构建脚本本身不负责上传 OSS，发布流水线通过 `release:upload` 完成上传。
 
 如需一键构建并上传，可执行 `npm run ai-game-creator-shell:release:upload`。该命令要求本机已安装并配置 `ossutil`，
 先按上述规则比较 OSS 版本、递增 patch、构建 Windows x64 NSIS，再上传安装包和 `latest.json`。默认上传到