diff --git a/packages/opencode/src/cli/cmd/tui/app.tsx b/packages/opencode/src/cli/cmd/tui/app.tsx
index 4161c025c1..5941725f5c 100644
--- a/packages/opencode/src/cli/cmd/tui/app.tsx
+++ b/packages/opencode/src/cli/cmd/tui/app.tsx
@@ -16,7 +16,7 @@ import {
   on,
   onCleanup,
 } from "solid-js"
-import { win32DisableProcessedInput, win32InstallCtrlCGuard } from "./win32"
+import { win32DisableProcessedInput, win32Init, win32InstallCtrlCGuard } from "./win32"
 import { Flag } from "@/flag/flag"
 import semver from "semver"
 import { DialogProvider, useDialog } from "@tui/ui/dialog"
@@ -176,6 +176,7 @@ export function tui(input: {
 }) {
   // promise to prevent immediate exit
   return new Promise<void>(async (resolve) => {
+    await win32Init()
     const unguard = win32InstallCtrlCGuard()
     win32DisableProcessedInput()
 
diff --git a/packages/opencode/src/cli/cmd/tui/win32.ts b/packages/opencode/src/cli/cmd/tui/win32.ts
index 23e9f44857..11659a7d64 100644
--- a/packages/opencode/src/cli/cmd/tui/win32.ts
+++ b/packages/opencode/src/cli/cmd/tui/win32.ts
@@ -1,24 +1,34 @@
-import { dlopen, ptr } from "bun:ffi"
-
 const STD_INPUT_HANDLE = -10
 const ENABLE_PROCESSED_INPUT = 0x0001
 
-const kernel = () =>
-  dlopen("kernel32.dll", {
-    GetStdHandle: { args: ["i32"], returns: "ptr" },
-    GetConsoleMode: { args: ["ptr", "ptr"], returns: "i32" },
-    SetConsoleMode: { args: ["ptr", "u32"], returns: "i32" },
-    FlushConsoleInputBuffer: { args: ["ptr"], returns: "i32" },
-  })
+let mod: typeof import("bun:ffi") | undefined
+type K32 = {
+  GetStdHandle: (n: number) => bigint | number
+  GetConsoleMode: (h: bigint | number, mode: unknown) => number
+  SetConsoleMode: (h: bigint | number, mode: number) => number
+  FlushConsoleInputBuffer: (h: bigint | number) => number
+}
 
-let k32: ReturnType<typeof kernel> | undefined
+let k32: K32 | undefined
+let ready: boolean | undefined
 
-function load() {
+type Ptr = typeof import("bun:ffi").ptr
+
+export async function win32Init() {
   if (process.platform !== "win32") return false
+  if (ready !== undefined) return ready
   try {
-    k32 ??= kernel()
+    mod = await import("bun:ffi")
+    k32 = (mod.dlopen("kernel32.dll", {
+      GetStdHandle: { args: ["i32"], returns: "ptr" },
+      GetConsoleMode: { args: ["ptr", "ptr"], returns: "i32" },
+      SetConsoleMode: { args: ["ptr", "u32"], returns: "i32" },
+      FlushConsoleInputBuffer: { args: ["ptr"], returns: "i32" },
+    }).symbols as unknown as K32)
+    ready = true
     return true
   } catch {
+    ready = false
     return false
   }
 }
@@ -29,15 +39,17 @@ function load() {
 export function win32DisableProcessedInput() {
   if (process.platform !== "win32") return
   if (!process.stdin.isTTY) return
-  if (!load()) return
+  if (!k32 || !mod) return
+  const ptr = mod.ptr as Ptr
 
-  const handle = k32!.symbols.GetStdHandle(STD_INPUT_HANDLE)
+  const lib = k32
+  const handle = lib.GetStdHandle(STD_INPUT_HANDLE)
   const buf = new Uint32Array(1)
-  if (k32!.symbols.GetConsoleMode(handle, ptr(buf)) === 0) return
+  if (lib.GetConsoleMode(handle, ptr(buf)) === 0) return
 
   const mode = buf[0]!
   if ((mode & ENABLE_PROCESSED_INPUT) === 0) return
-  k32!.symbols.SetConsoleMode(handle, mode & ~ENABLE_PROCESSED_INPUT)
+  lib.SetConsoleMode(handle, mode & ~ENABLE_PROCESSED_INPUT)
 }
 
 /**
@@ -46,10 +58,11 @@ export function win32DisableProcessedInput() {
 export function win32FlushInputBuffer() {
   if (process.platform !== "win32") return
   if (!process.stdin.isTTY) return
-  if (!load()) return
+  if (!k32) return
 
-  const handle = k32!.symbols.GetStdHandle(STD_INPUT_HANDLE)
-  k32!.symbols.FlushConsoleInputBuffer(handle)
+  const lib = k32
+  const handle = lib.GetStdHandle(STD_INPUT_HANDLE)
+  lib.FlushConsoleInputBuffer(handle)
 }
 
 let unhook: (() => void) | undefined
@@ -68,23 +81,25 @@ let unhook: (() => void) | undefined
 export function win32InstallCtrlCGuard() {
   if (process.platform !== "win32") return
   if (!process.stdin.isTTY) return
-  if (!load()) return
+  if (!k32 || !mod) return
   if (unhook) return unhook
+  const ptr = mod.ptr as Ptr
+  const lib = k32
 
   const stdin = process.stdin as any
   const original = stdin.setRawMode
 
-  const handle = k32!.symbols.GetStdHandle(STD_INPUT_HANDLE)
+  const handle = lib.GetStdHandle(STD_INPUT_HANDLE)
   const buf = new Uint32Array(1)
 
-  if (k32!.symbols.GetConsoleMode(handle, ptr(buf)) === 0) return
+  if (lib.GetConsoleMode(handle, ptr(buf)) === 0) return
   const initial = buf[0]!
 
   const enforce = () => {
-    if (k32!.symbols.GetConsoleMode(handle, ptr(buf)) === 0) return
+    if (lib.GetConsoleMode(handle, ptr(buf)) === 0) return
     const mode = buf[0]!
     if ((mode & ENABLE_PROCESSED_INPUT) === 0) return
-    k32!.symbols.SetConsoleMode(handle, mode & ~ENABLE_PROCESSED_INPUT)
+    lib.SetConsoleMode(handle, mode & ~ENABLE_PROCESSED_INPUT)
   }
 
   // Some runtimes can re-apply console modes on the next tick; enforce twice.
@@ -121,7 +136,7 @@ export function win32InstallCtrlCGuard() {
       stdin.setRawMode = original
     }
 
-    k32!.symbols.SetConsoleMode(handle, initial)
+    lib.SetConsoleMode(handle, initial)
     unhook = undefined
   }