Error Use Tool Edit #53151

Bug Description

1. Edit Tool Failure (Could not find oldString): When models attempt to use the edit tool, it frequently fails with the error: Could not find oldString in [file_path]. It must match exactly, including whitespace and indentation. This happens across multiple different models.
2. OS/Shell Incompatibility: Models frequently try to execute bash or Linux-based commands/scripts (e.g., python3, npx commands configured for bash) despite the operating system environment running on Windows.

Steps to Reproduce

1. Run OpenCode on a Windows machine.
2. Ask the model to modify an existing file using the edit tool.
3. Observe the oldString matching error, forcing the model to fallback to alternative shell/python workarounds.

Environment

• OS: Windows 11
• OpenCode Version: 2.0.22