refactor: replace Bun.stdin.text with Node.js stream reading

packages/opencode/src/cli/cmd/run.ts

@@ -337,7 +337,14 @@ export const RunCommand = cmd({
       }
     }
 
-    if (!process.stdin.isTTY) message += "\n" + (await Bun.stdin.text())
+    if (!process.stdin.isTTY) {
+      const stdinText = await new Promise<string>((resolve) => {
+        const chunks: Buffer[] = []
+        process.stdin.on("data", (chunk) => chunks.push(chunk))
+        process.stdin.on("end", () => resolve(Buffer.concat(chunks).toString("utf-8")))
+      })
+      message += "\n" + stdinText
+    }
 
     if (message.trim().length === 0 && !args.command) {
       UI.error("You must provide a message or a command")

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

@@ -53,7 +53,13 @@ async function target() {
 }
 
 async function input(value?: string) {
-  const piped = process.stdin.isTTY ? undefined : await Bun.stdin.text()
+  const piped = process.stdin.isTTY
+    ? undefined
+    : await new Promise<string>((resolve) => {
+        const chunks: Buffer[] = []
+        process.stdin.on("data", (chunk) => chunks.push(chunk))
+        process.stdin.on("end", () => resolve(Buffer.concat(chunks).toString("utf-8")))
+      })
   if (!value) return piped
   if (!piped) return value
   return piped + "\n" + value