fix: prevent unrecoverable "Failed to fetch" on long sessions

packages/core/src/util/retry.ts

@@ -25,7 +25,7 @@ function isTransientError(error: unknown): boolean {
 }
 
 export async function retry<T>(fn: () => Promise<T>, options: RetryOptions = {}): Promise<T> {
-  const { attempts = 3, delay = 500, factor = 2, maxDelay = 10000, retryIf = isTransientError } = options
+  const { attempts = 5, delay = 1000, factor = 2, maxDelay = 30000, retryIf = isTransientError } = options
 
   let lastError: unknown
   for (let attempt = 0; attempt < attempts; attempt++) {

packages/sdk/js/src/client.ts

@@ -33,8 +33,12 @@ function rewrite(request: Request, directory?: string) {
 export function createOpencodeClient(config?: Config & { directory?: string }) {
   if (!config?.fetch) {
     const customFetch: any = (req: any) => {
+      // Use a 5-minute timeout instead of disabling it entirely.
+      // Disabling the timeout causes fetch to hang forever when the backend
+      // becomes unresponsive, leading to unrecoverable "Failed to fetch" errors
+      // in the renderer (see #28702).
       // @ts-ignore
-      req.timeout = false
+      req.timeout = 300_000
       return fetch(req)
     }
     config = {

packages/sdk/js/src/v2/client.ts

@@ -47,8 +47,12 @@ function rewrite(request: Request, values: { directory?: string; workspace?: str
 export function createOpencodeClient(config?: Config & { directory?: string; experimental_workspaceID?: string }) {
   if (!config?.fetch) {
     const customFetch: any = (req: any) => {
+      // Use a 5-minute timeout instead of disabling it entirely.
+      // Disabling the timeout causes fetch to hang forever when the backend
+      // becomes unresponsive, leading to unrecoverable "Failed to fetch" errors
+      // in the renderer (see #28702).
       // @ts-ignore
-      req.timeout = false
+      req.timeout = 300_000
       return fetch(req)
     }
     config = {