Improve opencode-config install on Windows

packages/server/scripts/copy-opencode-config.mjs

@@ -10,7 +10,7 @@ const cliRoot = path.resolve(__dirname, "..")
 const sourceDir = path.resolve(cliRoot, "../opencode-config")
 const targetDir = path.resolve(cliRoot, "dist/opencode-config")
 const nodeModulesDir = path.resolve(sourceDir, "node_modules")
-const npmCmd = process.platform === "win32" ? "npm.cmd" : "npm"
+const npmCandidates = process.platform === "win32" ? ["npm.cmd", "npm"] : ["npm"]
 
 if (!existsSync(sourceDir)) {
   console.error(`[copy-opencode-config] Missing source directory at ${sourceDir}`)
@@ -19,24 +19,41 @@ if (!existsSync(sourceDir)) {
 
 if (!existsSync(nodeModulesDir)) {
   console.log(`[copy-opencode-config] Installing opencode-config dependencies in ${sourceDir}`)
-  const result = spawnSync(
-    npmCmd,
-    [
-      "install",
-      "--prefix",
-      sourceDir,
-      "--omit=dev",
-      "--ignore-scripts",
-      "--fund=false",
-      "--audit=false",
-      "--package-lock=false",
-      "--workspaces=false",
-    ],
-    { cwd: sourceDir, stdio: "inherit", env: { ...process.env, npm_config_workspaces: "false" } },
-  )
-  if (result.status !== 0) {
+
+  const npmArgs = [
+    "install",
+    "--omit=dev",
+    "--ignore-scripts",
+    "--fund=false",
+    "--audit=false",
+    "--package-lock=false",
+    "--workspaces=false",
+  ]
+
+  let lastResult
+  for (const npmCmd of npmCandidates) {
+    const result = spawnSync(npmCmd, npmArgs, {
+      cwd: sourceDir,
+      stdio: "inherit",
+      env: { ...process.env, npm_config_workspaces: "false" },
+    })
+
+    lastResult = result
+
+    if (result.error?.code === "ENOENT") {
+      console.warn(`[copy-opencode-config] ${npmCmd} not found on PATH, trying next candidate`)
+      continue
+    }
+
+    break
+  }
+
+  if (!lastResult || lastResult.status !== 0) {
+    if (lastResult?.error) {
+      console.error("[copy-opencode-config] npm install failed to start", lastResult.error)
+    }
     console.error("[copy-opencode-config] Failed to install opencode-config dependencies")
-    process.exit(result.status ?? 1)
+    process.exit(lastResult?.status ?? 1)
   }
 }