fix: disable mouse tracking on Windows terminal exit

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

@@ -40,6 +40,7 @@ import { writeHeapSnapshot } from "v8"
 import { PromptRefProvider, usePromptRef } from "./context/prompt"
 import { registerKiloCommands } from "@/kilocode/kilo-commands" // kilocode_change
 import { initializeTUIDependencies } from "@kilocode/kilo-gateway/tui" // kilocode_change
+import { resetTerminalState } from "@tui/util/terminal"
 
 async function getTerminalBackgroundColor(): Promise<"dark" | "light"> {
   // can't set raw mode if not a TTY
@@ -120,6 +121,9 @@ export function tui(input: {
       resolve()
     }
 
+    // Safety net: ensure mouse tracking is disabled regardless of exit path
+    process.on("exit", resetTerminalState)
+
     render(
       () => {
         return (
@@ -714,6 +718,7 @@ function ErrorComponent(props: {
   const handleExit = async () => {
     renderer.setTerminalTitle("")
     renderer.destroy()
+    resetTerminalState()
     props.onExit()
   }
 

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

@@ -1,6 +1,7 @@
 import { useRenderer } from "@opentui/solid"
 import { createSimpleContext } from "./helper"
 import { FormatError, FormatUnknownError } from "@/cli/error"
+import { resetTerminalState } from "@tui/util/terminal"
 type Exit = ((reason?: unknown) => Promise<void>) & {
   message: {
     set: (value?: string) => () => void
@@ -32,6 +33,7 @@ export const { use: useExit, provider: ExitProvider } = createSimpleContext({
         // Reset window title before destroying renderer
         renderer.setTerminalTitle("")
         renderer.destroy()
+        resetTerminalState()
         await input.onExit?.()
         if (reason) {
           const formatted = FormatError(reason) ?? FormatUnknownError(reason)

packages/opencode/src/cli/cmd/tui/util/terminal.ts

@@ -1,5 +1,27 @@
 import { RGBA } from "@opentui/core"
 
+/**
+ * Write escape sequences to disable all mouse tracking modes and reset terminal state.
+ * This is a safety net to ensure the terminal is clean after exit, even if the renderer's
+ * cleanup didn't flush properly (e.g. on Windows).
+ */
+export function resetTerminalState() {
+  const sequences = [
+    "\x1b[?1000l", // disable normal mouse tracking
+    "\x1b[?1002l", // disable button-event mouse tracking
+    "\x1b[?1003l", // disable any-event mouse tracking (all movement)
+    "\x1b[?1006l", // disable SGR extended mouse mode
+    "\x1b[?1015l", // disable RXVT mouse mode
+    "\x1b[<u", // pop/disable Kitty keyboard protocol
+    "\x1b[0m", // reset text attributes
+  ]
+  try {
+    process.stdout.write(sequences.join(""))
+  } catch {
+    // stdout may already be closed during exit
+  }
+}
+
 export namespace Terminal {
   export type Colors = Awaited<ReturnType<typeof colors>>
   /**