fix(installer): always use .config/opencode for CLI on Windows (#2502)

src/shared/opencode-config-dir.test.ts

@@ -191,6 +191,20 @@ describe("opencode-config-dir", () => {
         // then returns ~/.config/opencode (cross-platform default)
         expect(result).toBe(join(homedir(), ".config", "opencode"))
       })
+
+      test("returns ~/.config/opencode on Windows even when APPDATA is set (#2502)", () => {
+        // given opencode CLI binary detected, platform is Windows with APPDATA set
+        // (regression test: previously would check AppData for existing config)
+        Object.defineProperty(process, "platform", { value: "win32" })
+        process.env.APPDATA = "C:\\Users\\TestUser\\AppData\\Roaming"
+        delete process.env.OPENCODE_CONFIG_DIR
+
+        // when getOpenCodeConfigDir is called with binary="opencode"
+        const result = getOpenCodeConfigDir({ binary: "opencode", version: "1.0.200", checkExisting: false })
+
+        // then returns ~/.config/opencode (ignores APPDATA entirely for CLI)
+        expect(result).toBe(join(homedir(), ".config", "opencode"))
+      })
     })
 
     describe("for opencode-desktop Tauri binary", () => {

src/shared/opencode-config-dir.ts

@@ -49,22 +49,7 @@ function getCliConfigDir(): string {
   }
 
   if (process.platform === "win32") {
-    const crossPlatformDir = join(homedir(), ".config", "opencode")
+    return join(homedir(), ".config", "opencode")
-    const crossPlatformConfig = join(crossPlatformDir, "opencode.json")
-
-    if (existsSync(crossPlatformConfig)) {
-      return crossPlatformDir
-    }
-
-    const appData = process.env.APPDATA || join(homedir(), "AppData", "Roaming")
-    const appdataDir = join(appData, "opencode")
-    const appdataConfig = join(appdataDir, "opencode.json")
-
-    if (existsSync(appdataConfig)) {
-      return appdataDir
-    }
-
-    return crossPlatformDir
   }
 
   const xdgConfig = process.env.XDG_CONFIG_HOME || join(homedir(), ".config")