From 0451fb77de97dbe03a9f5af6fc27158af105b835 Mon Sep 17 00:00:00 2001
From: Ryan Hughes <ryan@heyoodle.com>
Date: Sun, 11 Jan 2026 17:28:13 -0500
Subject: [PATCH] fix(tui): defer prompt.set() to prevent crash when using
 --prompt flag

Fixes #7818

The parent's onMount runs before the child Prompt component's onMount,
so the prompt ref is undefined when prompt.set() is called. Using
queueMicrotask() defers execution until after the child's onMount
completes and the ref is available.
---
 .../opencode/src/cli/cmd/tui/routes/home.tsx  | 20 +++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/packages/opencode/src/cli/cmd/tui/routes/home.tsx b/packages/opencode/src/cli/cmd/tui/routes/home.tsx
index 2155ab94744..ec6fab18b25 100644
--- a/packages/opencode/src/cli/cmd/tui/routes/home.tsx
+++ b/packages/opencode/src/cli/cmd/tui/routes/home.tsx
@@ -79,14 +79,18 @@ export function Home() {
   onMount(() => {
     randomizeTip()
     if (once) return
-    if (route.initialPrompt) {
-      prompt.set(route.initialPrompt)
-      once = true
-    } else if (args.prompt) {
-      prompt.set({ input: args.prompt, parts: [] })
-      once = true
-      prompt.submit()
-    }
+    // Defer to allow child Prompt component's onMount to run first
+    queueMicrotask(() => {
+      if (once || !prompt) return
+      if (route.initialPrompt) {
+        prompt.set(route.initialPrompt)
+        once = true
+      } else if (args.prompt) {
+        prompt.set({ input: args.prompt, parts: [] })
+        once = true
+        prompt.submit()
+      }
+    })
   })
   const directory = useDirectory()