simplify

Propagate renderer startup failures from the TUI promise instead of
leaving opencode hanging, and destroy any partially initialized
renderer before rejecting to restore terminal state.

packages/opencode/src/cli/cmd/tui/app.tsx

@@ -117,11 +117,8 @@ export function tui(input: {
   headers?: RequestInit["headers"]
   events?: EventSource
 }) {
-  // promise to prevent immediate exit
+  return new Promise<void>((resolve, reject) => {
-  // oxlint-disable-next-line no-async-promise-executor -- intentional: async executor used for sequential setup before resolve
-  return new Promise<void>(async (resolve) => {
     const unguard = win32InstallCtrlCGuard()
-    win32DisableProcessedInput()
 
     const onExit = async () => {
       unguard?.()
@@ -132,6 +129,9 @@ export function tui(input: {
       await TuiPluginRuntime.dispose()
     }
 
+    void (async () => {
+      win32DisableProcessedInput()
+
       const renderer = await createCliRenderer(rendererConfig(input.config))
       const mode = (await renderer.waitForThemeMode(1000)) ?? "dark"
 
@@ -199,6 +199,7 @@ export function tui(input: {
           </ErrorBoundary>
         )
       }, renderer)
+    })().catch(reject)
   })
 }
 

packages/opencode/test/cli/tui/app.test.ts

@@ -0,0 +1,29 @@
+import { afterEach, expect, mock, spyOn, test } from "bun:test"
+import * as Core from "@opentui/core"
+
+afterEach(() => {
+  mock.restore()
+})
+
+test("tui rejects when renderer startup fails", async () => {
+  const err = new Error("setRawMode failed with errno: 9")
+  spyOn(Core, "createCliRenderer").mockRejectedValue(err)
+
+  const { tui } = await import("../../../src/cli/cmd/tui/app")
+  const result = await Promise.race([
+    tui({
+      url: "http://opencode.internal",
+      config: {},
+      args: {
+        continue: false,
+        fork: false,
+      },
+    }).then(
+      () => "resolved",
+      (error) => error,
+    ),
+    Bun.sleep(100).then(() => "timeout"),
+  ])
+
+  expect(result).toBe(err)
+})