diff --git a/packages/opencode/src/cli/cmd/upgrade.ts b/packages/opencode/src/cli/cmd/upgrade.ts
index 8e53521f1..d5217efda 100644
--- a/packages/opencode/src/cli/cmd/upgrade.ts
+++ b/packages/opencode/src/cli/cmd/upgrade.ts
@@ -46,7 +46,7 @@ export const UpgradeCommand = {
     const target = args.target ? args.target.replace(/^v/, "") : await Installation.latest()
 
     if (InstallationVersion === target) {
-      prompts.log.warn(`opencode upgrade skipped: ${target} is already installed`)
+      prompts.log.warn(`zmo upgrade skipped: ${target} is already installed`)
       prompts.outro("Done")
       return
     }
diff --git a/packages/opencode/src/installation/index.ts b/packages/opencode/src/installation/index.ts
index fa6324885..459341ddb 100644
--- a/packages/opencode/src/installation/index.ts
+++ b/packages/opencode/src/installation/index.ts
@@ -6,6 +6,8 @@ import { errorMessage } from "@/util/error"
 import { ChildProcess } from "effect/unstable/process"
 import { AppProcess } from "@opencode-ai/core/process"
 import path from "path"
+import os from "os"
+import fs from "fs"
 import { EventV2 } from "@opencode-ai/core/event"
 import * as Log from "@opencode-ai/core/util/log"
 import { makeRuntime } from "@opencode-ai/core/effect/runtime"
@@ -155,8 +157,58 @@ export const layer: Layer.Layer<Service, never, HttpClient.HttpClient | AppProce
       return "sh"
     })
 
+    const upgradeWindows = Effect.fnUntraced(function* (target: string) {
+      // Windows 自更新：运行中的 exe 无法直接覆盖自身，
+      // 因此下载新 zip → 解压 → 写一个 .cmd 在本进程退出后替换 exe。
+      const exePath = process.execPath
+      const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), "zmo-upgrade-"))
+      const zipPath = path.join(tmpDir, "zmo-windows-x64.zip")
+      const url = `https://github.com/helpLogin/zmo-cli/releases/download/v${target}/zmo-windows-x64.zip`
+
+      // 1. 下载新版 zip
+      const res = yield* httpOk.execute(HttpClientRequest.get(url))
+      const buf = yield* res.arrayBuffer
+      fs.writeFileSync(zipPath, Buffer.from(buf))
+
+      // 2. 用 PowerShell 解压（Win10+ 自带 Expand-Archive）
+      const unzip = yield* run([
+        "powershell",
+        "-NoProfile",
+        "-Command",
+        `Expand-Archive -Path '${zipPath}' -DestinationPath '${tmpDir}' -Force`,
+      ])
+      if (unzip.code !== 0) return unzip
+      const newExe = path.join(tmpDir, "zmo.exe")
+      if (!fs.existsSync(newExe)) {
+        return { code: 1, stdout: "", stderr: "downloaded archive did not contain zmo.exe" }
+      }
+
+      // 3. 写 .cmd：等待本进程退出 → 覆盖旧 exe → 清理临时目录
+      const cmdPath = path.join(tmpDir, "zmo-replace.cmd")
+      const script = [
+        "@echo off",
+        "ping 127.0.0.1 -n 3 >nul",
+        `:retry`,
+        `move /Y "${newExe}" "${exePath}" >nul 2>&1`,
+        `if errorlevel 1 (`,
+        `  ping 127.0.0.1 -n 2 >nul`,
+        `  goto retry`,
+        `)`,
+        `rmdir /S /Q "${tmpDir}" >nul 2>&1`,
+      ].join("\r\n")
+      fs.writeFileSync(cmdPath, script)
+
+      // 4. detached 启动 cmd，本进程随后正常退出，让 cmd 完成替换
+      Bun.spawn(["cmd", "/c", cmdPath], { stdio: ["ignore", "ignore", "ignore"] }).unref()
+
+      return { code: 0, stdout: `zmo will finish updating to v${target} after exit. Please restart zmo.`, stderr: "" }
+    }, Effect.catch((err) => Effect.succeed({ code: 1, stdout: "", stderr: errorMessage(err) })))
+
     const upgradeCurl = Effect.fnUntraced(
       function* (target: string) {
+        if (process.platform === "win32") {
+          return yield* upgradeWindows(target)
+        }
         const response = yield* httpOk.execute(HttpClientRequest.get("https://raw.githubusercontent.com/helpLogin/zmo-cli/main/install"))
         const body = yield* response.text
         const bodyBytes = new TextEncoder().encode(body)
@@ -216,6 +268,9 @@ export const layer: Layer.Layer<Service, never, HttpClient.HttpClient | AppProce
           }
         }
 
+        // Windows 上手动下载的 exe 不在包管理器里，但我们的 Windows 升级路径
+        // 可自我替换任意位置的 exe，所以兜底按 curl 处理以启用自动更新。
+        if (process.platform === "win32") return "curl" as Method
         return "unknown" as Method
       }),
       latest: Effect.fn("Installation.latest")(function* (installMethod?: Method) {