fix(opencode): keep TUI interactive with piped stdin

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

@@ -172,6 +172,7 @@ export function tui(input: {
   fetch?: typeof fetch
   headers?: RequestInit["headers"]
   events?: EventSource
+  stdin?: NodeJS.ReadStream
 }) {
   // promise to prevent immediate exit
   // oxlint-disable-next-line no-async-promise-executor -- intentional: async executor used for sequential setup before resolve
@@ -189,7 +190,10 @@ export function tui(input: {
       TuiAudio.dispose()
     }
 
-    const renderer = await createCliRenderer(rendererConfig(input.config))
+    const renderer = await createCliRenderer({
+      ...rendererConfig(input.config),
+      ...(input.stdin ? { stdin: input.stdin } : {}),
+    })
     // Prewarm palette before ThemeProvider mounts so `system` theme avoids a first-paint fallback flash.
     void renderer.getPalette({ size: 16 }).catch(() => undefined)
     const mode = (await renderer.waitForThemeMode(1000)) ?? "dark"

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

@@ -21,6 +21,7 @@ import {
   sanitizedProcessEnv,
 } from "@opencode-ai/core/util/opencode-process"
 import { validateSession } from "./validate-session"
+import { INTERACTIVE_INPUT_ERROR, resolveInteractiveStdin } from "../run/runtime.stdin"
 
 declare global {
   const OPENCODE_WORKER_PATH: string
@@ -116,11 +117,29 @@ export const TuiThreadCommand = cmd({
     // Keep ENABLE_PROCESSED_INPUT cleared even if other code flips it.
     // (Important when running under `bun run` wrappers on Windows.)
     const unguard = win32InstallCtrlCGuard()
+    let interactiveStdin: ReturnType<typeof resolveInteractiveStdin> | undefined
     try {
       // Must be the very first thing — disables CTRL_C_EVENT before any Worker
       // spawn or async work so the OS cannot kill the process group.
       win32DisableProcessedInput()
 
+      try {
+        interactiveStdin = resolveInteractiveStdin()
+      } catch (error) {
+        if (error instanceof Error && error.message === INTERACTIVE_INPUT_ERROR) {
+          UI.error(error.message)
+          process.exitCode = 1
+          return
+        }
+
+        throw error
+      }
+
+      if (!interactiveStdin) {
+        process.exitCode = 1
+        return
+      }
+
       if (args.fork && !args.continue && !args.session) {
         UI.error("--fork requires --continue or --session")
         process.exitCode = 1
@@ -236,6 +255,7 @@ export const TuiThreadCommand = cmd({
             const server = await client.call("snapshot", undefined)
             return [tui, server]
           },
+          stdin: interactiveStdin.stdin,
           config,
           directory: cwd,
           fetch: transport.fetch,
@@ -253,6 +273,7 @@ export const TuiThreadCommand = cmd({
         await stop()
       }
     } finally {
+      interactiveStdin?.cleanup?.()
       unguard?.()
     }
     process.exit(0)