feat: support configuring default server URL for desktop (#7363)

packages/app/src/app.tsx

@@ -33,13 +33,14 @@ const Loading = () => <div class="size-full flex items-center justify-center tex
 
 declare global {
   interface Window {
-    __OPENCODE__?: { updaterEnabled?: boolean; port?: number; serverReady?: boolean }
+    __OPENCODE__?: { updaterEnabled?: boolean; port?: number; serverReady?: boolean; serverUrl?: string }
   }
 }
 
 const defaultServerUrl = iife(() => {
   if (location.hostname.includes("opencode.ai")) return "http://localhost:4096"
-  if (window.__OPENCODE__) return `http://127.0.0.1:${window.__OPENCODE__.port}`
+  if (window.__OPENCODE__?.serverUrl) return window.__OPENCODE__.serverUrl
+  if (window.__OPENCODE__?.port) return `http://127.0.0.1:${window.__OPENCODE__.port}`
   if (import.meta.env.DEV)
     return `http://${import.meta.env.VITE_OPENCODE_SERVER_HOST ?? "localhost"}:${import.meta.env.VITE_OPENCODE_SERVER_PORT ?? "4096"}`
 

packages/app/src/components/dialog-select-server.tsx

@@ -1,4 +1,4 @@
-import { createEffect, createMemo, onCleanup } from "solid-js"
+import { createResource, createEffect, createMemo, onCleanup, Show } from "solid-js"
 import { createStore, reconcile } from "solid-js/store"
 import { useDialog } from "@opencode-ai/ui/context/dialog"
 import { Dialog } from "@opencode-ai/ui/dialog"
@@ -35,6 +35,8 @@ export function DialogSelectServer() {
     error: "",
     status: {} as Record<string, ServerStatus | undefined>,
   })
+  const [defaultUrl, defaultUrlActions] = createResource(() => platform.getDefaultServerUrl?.())
+  const isDesktop = platform.platform === "desktop"
 
   const items = createMemo(() => {
     const current = server.url
@@ -173,6 +175,53 @@ export function DialogSelectServer() {
             </div>
           </form>
         </div>
+
+        <Show when={isDesktop}>
+          <div class="mt-6 px-3 flex flex-col gap-1.5">
+            <div class="px-3">
+              <h3 class="text-14-regular text-text-weak">Default server</h3>
+              <p class="text-12-regular text-text-weak mt-1">
+                Connect to this server on app launch instead of starting a local server. Requires restart.
+              </p>
+            </div>
+            <div class="flex items-center gap-2 px-3 py-2">
+              <Show
+                when={defaultUrl()}
+                fallback={
+                  <Show
+                    when={server.url}
+                    fallback={<span class="text-14-regular text-text-weak">No server selected</span>}
+                  >
+                    <Button
+                      variant="secondary"
+                      size="small"
+                      onClick={async () => {
+                        await platform.setDefaultServerUrl?.(server.url)
+                        defaultUrlActions.refetch(server.url)
+                      }}
+                    >
+                      Set current server as default
+                    </Button>
+                  </Show>
+                }
+              >
+                <div class="flex items-center gap-2 flex-1 min-w-0">
+                  <span class="truncate text-14-regular">{serverDisplayName(defaultUrl()!)}</span>
+                </div>
+                <Button
+                  variant="ghost"
+                  size="small"
+                  onClick={async () => {
+                    await platform.setDefaultServerUrl?.(null)
+                    defaultUrlActions.refetch()
+                  }}
+                >
+                  Clear
+                </Button>
+              </Show>
+            </div>
+          </div>
+        </Show>
       </div>
     </Dialog>
   )

packages/app/src/context/platform.tsx

@@ -37,6 +37,12 @@ export type Platform = {
 
   /** Fetch override */
   fetch?: typeof fetch
+
+  /** Get the configured default server URL (desktop only) */
+  getDefaultServerUrl?(): Promise<string | null>
+
+  /** Set the default server URL to use on app startup (desktop only) */
+  setDefaultServerUrl?(url: string | null): Promise<void>
 }
 
 export const { use: usePlatform, provider: PlatformProvider } = createSimpleContext({