[BUG]

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

The Bash tool returns (Bash completed with no output) for every command — including trivial ones like echo "test", whoami, pwd, and git --version. No stdout, no stderr. All other tools (Read, Write, Edit, Glob, Grep) work normally. The issue persists for the entire session, including after the user restarts.

What Should Happen?

Bash tool should capture and return stdout/stderr from the underlying shell process.

Error Messages/Logs

No error messages — that's the problem. Every command returns the same empty result: (Bash completed with no output).

Steps to Reproduce

Steps to Reproduce

Open Claude Code on Windows 11 (Desktop App)
Working directory: an Obsidian vault (non-git directory)
Claude Code spawns Git Bash (MINGW64) as shell — visible in shell snapshot PATH: /mingw64/bin:/usr/local/bin:/usr/bin
Run any Bash tool command, e.g. echo "hello"
Output: (Bash completed with no output)
No .bashrc or .bash_profile exists in the user's home directory
Issue is intermittent — previous sessions on the same machine had working Bash output

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Last Working Version: Unknown exact version — worked in a session ~24h prior on the same machine (v2.1.111). Same version, different session.

Claude Code Version

2.1.111

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

Terminal/Shell: Git Bash (MINGW64/MSYS2, auto-detected by Claude Code)