fix(tui): Prompt from stdin breaks TUI

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

@@ -90,6 +90,7 @@ async function getTerminalBackgroundColor(): Promise<"dark" | "light"> {
 }
 
 export function tui(input: {
+  stdin?: NodeJS.ReadStream,
   url: string
   sessionID?: string
   model?: string
@@ -158,6 +159,7 @@ export function tui(input: {
         gatherStats: false,
         exitOnCtrlC: false,
         useKittyKeyboard: true,
+        stdin: input.stdin,
       },
     )
   })

packages/opencode/src/cli/cmd/tui/thread.ts

@@ -7,6 +7,8 @@ import { Session } from "@/session"
 import { bootstrap } from "@/cli/bootstrap"
 import path from "path"
 import { UI } from "@/cli/ui"
+import fs from "fs/promises"
+import tty from "tty"
 
 declare global {
   const OPENCODE_WORKER_PATH: string
@@ -59,9 +61,25 @@ export const TuiThreadCommand = cmd({
     const prompt = await (async () => {
       const piped = !process.stdin.isTTY ? await Bun.stdin.text() : undefined
       if (!args.prompt) return piped
-      return piped ? piped + "\n" + args.prompt : args.prompt
+      return piped ? args.prompt + "\n" + piped : args.prompt
     })()
 
+    let stdin: NodeJS.ReadStream
+    try {
+      stdin = process.stdin.isTTY
+        ? process.stdin
+        : new tty.ReadStream(
+          process.platform === "win32"
+            ? (await fs.open("CONIN$", "rw", 0o644)).fd
+            : (await fs.open("/dev/tty", "r")).fd
+        )
+    } catch (err) {
+      console.error(
+        "Failed to open TTY for input. Prompt piping from stdin might not be supported on your platform.",
+      )
+      process.exit(1)
+    }
+
     // Resolve relative paths against PWD to preserve behavior when using --cwd flag
     const baseCwd = process.env.PWD ?? process.cwd()
     const cwd = args.project ? path.resolve(baseCwd, args.project) : process.cwd()
@@ -120,6 +138,7 @@ export const TuiThreadCommand = cmd({
         hostname: args.hostname,
       })
       await tui({
+        stdin,
         url: server.url,
         sessionID,
         model: args.model,