Input box filled with text on startup #6147

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1. ocelot2123

   added

   bugSomething isn't workingSomething isn't working

   on Dec 25, 2025
2. github-actions

   assigned

   rekram1-node

   on Dec 25, 2025
3. github-actions

   added

   opentuiThis relates to changes in v1.0, now that opencode uses opentuiThis relates to changes in v1.0, now that opencode uses opentui

   windows

   on Dec 25, 2025
4. github-actions commented on Dec 25, 2025

   

   github-actionsBot

   on Dec 25, 2025 – with GitHub Actions

   Contributor

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   This issue might be a duplicate of existing issues. Please check:

   • [Bug] TUI fails to render with raw ANSI output and critical memory leak (72.5G VIRT) on startup #6119: [Bug] TUI fails to render with raw ANSI output and critical memory leak (72.5G VIRT) on startup - similar issue with text/ANSI codes appearing on startup over SSH with Linux servers
   • On closure terminal becomes window becomes bugged #6136: On closure terminal becomes window becomes bugged - related issue with ANSI escape sequences appearing in terminal after/during opencode usage

   Feel free to ignore if none of these address your specific case.
5. bbartels commented on Feb 5, 2026

   

   bbartels

   on Feb 5, 2026

   Contributor

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   Having the same issue, is there any workarounds?

   👍React with 👍3Reacted by Ethan Trewhitt, F.P.J. Nijweide and Edward Fu
6. rekram1-node

   assigned

   kommander

   and unassigned

   rekram1-node

   on Feb 5, 2026
7. KyungmoKu commented on Feb 9, 2026

   

   KyungmoKu

   on Feb 9, 2026

   Last edited by KyungmoKu

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   Had the same issue - Windows Terminal SSH into Ubuntu.

   This worked for me: a small Python script that wraps opencode and filters out the garbage from stdin before it reaches the TUI.

   • Save below file as osc-filter (no .py) somewhere in your PATH, chmod +x osc-filter, then run osc-filter opencode instead of opencode.
   • You can alias it in your bashrc for convenience: alias oc='osc-filter opencode'

   The proper fix probably belongs in opentui's input parser - it doesn't handle OSC sequences at all right now.

   osc-filter

   #!/usr/bin/env python3
   """PTY wrapper that filters OSC escape sequences from stdin.
   
   Windows Terminal sends unsolicited OSC queries (10/11/4) over SSH.
   The TUI's input parser has no OSC response handler, so the responses
   appear as garbage text like "eeee/eeee/eeee" in the input field.
   
   This wrapper runs the child command in a real PTY and strips OSC
   sequences from stdin before forwarding them to the child.
   
   Usage:
       osc-filter opencode [args...]
   
   OSC sequence format:
       ESC ] ... BEL        (\x1b] ... \x07)
       ESC ] ... ESC \      (\x1b] ... \x1b\\)
   """
   
   import fcntl
   import os
   import pty
   import select
   import signal
   import sys
   import termios
   
   ESC = 0x1B
   BEL = 0x07
   BACKSLASH = ord("\\")
   
   # Stateful: tracks whether we're inside a partial OSC sequence that was
   # split across read() boundaries (e.g., SSH delivers the response in chunks).
   _in_osc = False
   
   
   def filter_osc(buf: bytes) -> bytes:
       """Remove OSC sequences from a byte buffer.
   
       Handles split reads: if an OSC sequence spans two read() calls,
       the second half is suppressed until the terminator is found.
       """
       global _in_osc
       out = bytearray()
       i = 0
       n = len(buf)
   
       # Continuing a partial OSC from the previous read
       if _in_osc:
           while i < n:
               if buf[i] == BEL:
                   i += 1
                   _in_osc = False
                   break
               if buf[i] == ESC and i + 1 < n and buf[i + 1] == BACKSLASH:
                   i += 2
                   _in_osc = False
                   break
               i += 1
           if _in_osc:
               return b""
   
       while i < n:
           if buf[i] == ESC and i + 1 < n and buf[i + 1] == ord("]"):
               i += 2
               while i < n:
                   if buf[i] == BEL:
                       i += 1
                       break
                   if buf[i] == ESC and i + 1 < n and buf[i + 1] == BACKSLASH:
                       i += 2
                       break
                   i += 1
               else:
                   _in_osc = True
           else:
               out.append(buf[i])
               i += 1
   
       return bytes(out)
   
   
   def copy_window_size(from_fd: int, to_fd: int) -> None:
       try:
           size = fcntl.ioctl(from_fd, termios.TIOCGWINSZ, b"\x00" * 8)
           fcntl.ioctl(to_fd, termios.TIOCSWINSZ, size)
       except OSError:
           pass
   
   
   def main() -> int:
       if len(sys.argv) < 2:
           print(f"Usage: {sys.argv[0]} <command> [args...]", file=sys.stderr)
           return 1
   
       if not os.isatty(sys.stdin.fileno()):
           os.execvp(sys.argv[1], sys.argv[1:])
   
       pid, master_fd = pty.fork()
   
       if pid == 0:
           os.execvp(sys.argv[1], sys.argv[1:])
   
       stdin_fd = sys.stdin.fileno()
       stdout_fd = sys.stdout.fileno()
   
       old_attrs = termios.tcgetattr(stdin_fd)
       try:
           new_attrs = termios.tcgetattr(stdin_fd)
           new_attrs[0] = 0
           new_attrs[1] = 0
           new_attrs[2] &= ~(termios.CSIZE | termios.PARENB)
           new_attrs[2] |= termios.CS8
           new_attrs[3] = 0
           new_attrs[6][termios.VMIN] = 1
           new_attrs[6][termios.VTIME] = 0
           termios.tcsetattr(stdin_fd, termios.TCSAFLUSH, new_attrs)
       except termios.error:
           pass
   
       copy_window_size(stdin_fd, master_fd)
   
       def handle_sigwinch(signum, frame):
           copy_window_size(stdin_fd, master_fd)
           try:
               os.kill(pid, signal.SIGWINCH)
           except OSError:
               pass
   
       signal.signal(signal.SIGWINCH, handle_sigwinch)
   
       try:
           while True:
               try:
                   rfds, _, _ = select.select([stdin_fd, master_fd], [], [])
               except InterruptedError:
                   continue
   
               if stdin_fd in rfds:
                   try:
                       data = os.read(stdin_fd, 4096)
                   except OSError:
                       break
                   if not data:
                       break
                   filtered = filter_osc(data)
                   if filtered:
                       try:
                           os.write(master_fd, filtered)
                       except OSError:
                           break
   
               if master_fd in rfds:
                   try:
                       data = os.read(master_fd, 4096)
                   except OSError:
                       break
                   if not data:
                       break
                   try:
                       os.write(stdout_fd, data)
                   except OSError:
                       break
       finally:
           try:
               termios.tcsetattr(stdin_fd, termios.TCSAFLUSH, old_attrs)
           except termios.error:
               pass
   
       _, status = os.waitpid(pid, 0)
       if os.WIFEXITED(status):
           return os.WEXITSTATUS(status)
       return 1
   
   
   if __name__ == "__main__":
       sys.exit(main())

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8. gbpdt commented on Feb 13, 2026

   

   gbpdt

   on Feb 13, 2026

   Contributor

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   Had the same issue - Windows Terminal SSH into Ubuntu.

   This worked for me: a small Python script that wraps opencode and filters out the garbage from stdin before it reaches the TUI.

   Thanks for posting this. I've given this workaround a try and it seems to work for me. I'd be very keen to see this integrated into the TUI code itself.
9. llc1123 commented on Feb 14, 2026

   

   llc1123

   on Feb 14, 2026

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   It is fixed upstream. Waiting for a new release. PowerShell/openssh-portable#806

   👍React with 👍1Reacted by BaldLee
10. haifengqiu commented on Mar 20, 2026

    

    haifengqiu

    on Mar 20, 2026

    More actions

    Additional Info

    Environment: WindTerm 2.0+ (latest), TERM=xterm-256color, UTF-8
    Confirmed issue: opencode TUI has compatibility problem with WindTerm.

    • ESC]66 and other ANSI escape sequences displayed as raw text
    • Other TUI apps (htop, nnn,) work perfectly with Chinese display in WindTerm
    • Windows built-in terminal SSH works fine with opencode
    • Only opencode is affected
      Workaround: Using tmux in WindTerm works around this issue:

    tmux new -s opencode
    opencode
11. ocelot2123 commented on Apr 17, 2026

    

    ocelot2123

    on Apr 17, 2026

    Author

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    going to close this as I think its fixed somewhere upstream, maybe in anomalyco/opentui#770? maybe @kommander you can confirm
12. ocelot2123

    closed this as completedon Apr 17, 2026
13. kodewulf commented on Oct 31, 2026

    

    kodewulf

    on Oct 31, 2026

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    This same issue is now present in v2.2.5

    👍React with 👍3Reacted by Edward Fu, imazes and gerabell
14. ocelot2123

    reopened this on Oct 31, 2026
15. neriousy commented on Nov 12, 2026

    

    neriousy

    on Nov 12, 2026

    Member

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    Closing this old v1 report. If it still happens on v2, please open a new issue with your version.
16. neriousy

    closed this as not plannedon Nov 12, 2026