Fix Windows auth URL opener

src/cli.ts

@@ -11,6 +11,7 @@ const OPENCODE_CONFIG_DIR = join(homedir(), ".config", "opencode");
 const OPENCODE_COMMAND_DIR = join(OPENCODE_CONFIG_DIR, "command");
 const OH_MY_OPENCODE_CONFIG = join(OPENCODE_CONFIG_DIR, "oh-my-opencode.json");
 const PLUGIN_NAME = "opencode-supermemory@latest";
+const DEFAULT_CONFIG_FILE = CONFIG_FILE ?? join(OPENCODE_CONFIG_DIR, "supermemory.json");
 
 const SUPERMEMORY_INIT_COMMAND = `---
 description: Initialize Supermemory with comprehensive codebase knowledge
@@ -377,7 +378,7 @@ interface InstallOptions {
 async function install(options: InstallOptions): Promise<number> {
   console.log("\n🧠 opencode-supermemory installer\n");
 
-  writeInstallDefaults(existsSync(CONFIG_FILE));
+  writeInstallDefaults(existsSync(DEFAULT_CONFIG_FILE));
 
   const rl = options.tui ? createReadline() : null;
 

src/config.ts

@@ -102,6 +102,7 @@ function getApiKey(): string | undefined {
 
 export const SUPERMEMORY_API_KEY = getApiKey();
 export const CONFIG_FILE = CONFIG_FILES[1];
+const DEFAULT_CONFIG_FILE = CONFIG_FILE ?? join(CONFIG_DIR, "supermemory.json");
 
 export const CONFIG = {
   similarityThreshold: fileConfig.similarityThreshold ?? DEFAULTS.similarityThreshold,
@@ -140,5 +141,5 @@ export function writeInstallDefaults(isExistingInstall: boolean): void {
     next.autoRecallEveryPrompt = false;
     next.captureEveryNTurns = 0;
   }
-  writeFileSync(CONFIG_FILE, JSON.stringify(next, null, 2));
+  writeFileSync(DEFAULT_CONFIG_FILE, JSON.stringify(next, null, 2));
 }

src/services/auth.ts

@@ -1,8 +1,8 @@
 import { createServer, type IncomingMessage, type ServerResponse } from "node:http";
 import { existsSync, mkdirSync, readFileSync, rmSync, writeFileSync } from "node:fs";
-import { exec } from "node:child_process";
 import { join } from "node:path";
 import { homedir } from "node:os";
+import { openUrl } from "./openUrl.js";
 
 const CREDENTIALS_DIR = join(homedir(), ".supermemory-opencode");
 const CREDENTIALS_FILE = join(CREDENTIALS_DIR, "credentials.json");
@@ -40,21 +40,6 @@ export function clearCredentials(): boolean {
   return true;
 }
 
-function openBrowser(url: string): void {
-  const platform = process.platform;
-
-  const commands: Record<string, string> = {
-    darwin: `open "${url}"`,
-    win32: `start "" "${url}"`,
-    linux: `xdg-open "${url}"`,
-  };
-
-  const cmd = commands[platform] ?? `xdg-open "${url}"`;
-  exec(cmd, (err) => {
-    if (err) console.error("Failed to open browser:", err.message);
-  });
-}
-
 export interface AuthResult {
   success: boolean;
   apiKey?: string;
@@ -129,7 +114,13 @@ export function startAuthFlow(timeoutMs = 120000): Promise<AuthResult> {
 
       console.log("Opening browser for authentication...");
       console.log(`If it doesn't open, visit: ${authUrl}`);
-      openBrowser(authUrl);
+      openUrl(authUrl).catch((error) => {
+        if (!resolved) {
+          resolved = true;
+          server.close();
+          resolve({ success: false, error: `Failed to open browser: ${error.message}` });
+        }
+      });
     });
 
     setTimeout(() => {

src/services/client.ts

@@ -121,7 +121,7 @@ export class SupermemoryClient {
         sm_source: "opencode",
         sm_capture_mode: metadata?.sm_capture_mode ?? "tool",
         ...(metadata ?? {}),
-      } as Record<string, string | number | boolean | string[]>;
+      } as unknown as Record<string, string | number | boolean | string[]>;
 
       const result = await withTimeout(
         this.getClient().memories.add({

src/services/openUrl.ts

@@ -0,0 +1,34 @@
+import { execFile } from "node:child_process";
+
+function run(command: string, args: string[]): Promise<void> {
+  return new Promise((resolve, reject) => {
+    execFile(command, args, { windowsHide: true }, (error) => {
+      if (error) reject(error);
+      else resolve();
+    });
+  });
+}
+
+export async function openUrl(url: string | URL): Promise<void> {
+  const href = url.toString();
+  if (!/^https?:\/\//i.test(href)) {
+    throw new Error("Refusing to open non-http URL");
+  }
+
+  if (process.platform === "win32") {
+    try {
+      await run("rundll32.exe", ["url.dll,FileProtocolHandler", href]);
+      return;
+    } catch {}
+
+    await run("cmd.exe", ["/c", "start", '""', href]);
+    return;
+  }
+
+  if (process.platform === "darwin") {
+    await run("open", [href]);
+    return;
+  }
+
+  await run("xdg-open", [href]);
+}