fix(tui): graceful exit on Ctrl+C and resolve multiline paste corruption

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

@@ -770,6 +770,7 @@ function ErrorComponent(props: {
     renderer.destroy()
     win32FlushInputBuffer()
     await props.onExit()
+    setTimeout(() => process.exit(0), 100)
   }
 
   useKeyboard((evt) => {

packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx

@@ -125,6 +125,7 @@ export function Prompt(props: PromptProps) {
     mode: "normal" | "shell"
     extmarkToPartIndex: Map<number, number>
     interrupt: number
+    appExitArmed: number
     placeholder: number
   }>({
     placeholder: Math.floor(Math.random() * PLACEHOLDERS.length),
@@ -135,6 +136,7 @@ export function Prompt(props: PromptProps) {
     mode: "normal",
     extmarkToPartIndex: new Map(),
     interrupt: 0,
+    appExitArmed: 0,
   })
 
   createEffect(
@@ -865,8 +867,17 @@ export function Prompt(props: PromptProps) {
                 }
                 if (keybind.match("app_exit", e)) {
                   if (store.prompt.input === "") {
-                    await exit()
-                    // Don't preventDefault - let textarea potentially handle the event
+                    const now = Date.now()
+                    if (now - store.appExitArmed < 2000) {
+                      await exit()
+                    } else {
+                      setStore("appExitArmed", now)
+                      toast.show({
+                        message: "Press Ctrl+C again to exit",
+                        variant: "warning",
+                        duration: 2000,
+                      })
+                    }
                     e.preventDefault()
                     return
                   }
@@ -967,7 +978,9 @@ export function Prompt(props: PromptProps) {
                   !sync.data.config.experimental?.disable_paste_summary
                 ) {
                   event.preventDefault()
-                  pasteText(pastedContent, `[Pasted ~${lineCount} lines]`)
+                  // Temporarily insert text directly without extmark to avoid the "can not paste certain string" bug
+                  // which causes UI corruption and data loss on multi-line text
+                  input.insertText(pastedContent)
                   return
                 }
 

packages/opencode/src/cli/cmd/tui/context/exit.tsx

@@ -43,6 +43,7 @@ export const { use: useExit, provider: ExitProvider } = createSimpleContext({
         const text = store.get()
         if (text) process.stdout.write(text + "\n")
         await input.onExit?.()
+        setTimeout(() => process.exit(0), 100)
       },
       {
         message: store,

packages/opencode/src/index.ts

@@ -46,6 +46,11 @@ process.on("uncaughtException", (e) => {
   })
 })
 
+process.on("SIGHUP", () => {
+  Log.Default.info("SIGHUP received, exiting...")
+  process.exit(0)
+})
+
 let cli = yargs(hideBin(process.argv))
   .parserConfiguration({ "populate--": true })
   .scriptName("opencode")