Terminal starts typing random characters automatically during opencode OAuth setup

[isurudinusha]

Description

While setting up opencode and completing the OAuth flow, the terminal begins outputting random characters automatically without any user input. This happens immediately after the OAuth URL is displayed and the process appears to lose control of stdin.

The behavior makes the CLI unusable and forces the user to terminate the process manually.

Expected Behavior The CLI should wait for user input or proceed normally after OAuth without injecting any characters into the terminal.

Actual Behavior The terminal starts typing long sequences of random characters automatically, including numbers, semicolons, and escape-like sequences. No keyboard input is being made by the user.

Environment

OS: Windows 10

Terminal: Git Bash (MINGW64)

Shell: bash

Node.js: v22.18.0

opencode version: latest at time of testing

Additional Notes

The issue looks related to stdin handling after OAuth redirect.

Possibly caused by improper terminal mode reset or accidental stream piping.

Happens consistently after OAuth URL generation.

Screenshot attached showing the random character output.

Impact Blocks initial setup and prevents further use of the CLI.

Plugins

CLI

OpenCode version

1.1.23

Steps to reproduce

Run opencode in a terminal (Git Bash MINGW64 on Windows).

Run opencode auth login.

Proceed with the OAuth setup.

After the OAuth URL is printed, observe the terminal.

Screenshot and/or share link

Operating System

Windows 11

Terminal

Git