Bug in Claude Code 2.0.71 - tries to readFileSync() on .claude directory

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?

Bug: /doctor crashes with EISDIR when .claude directory exists in project

Version: Claude Code 2.0.71

OS: macOS (Darwin 25.1.0)

Description

Running the /doctor command crashes with EISDIR: illegal operation on a directory, read when the current working directory contains a .claude directory. Claude Code appears to call readFileSync() on the .claude path without first checking if it's a directory.

Steps to Reproduce

1. Create a .claude directory in your project: mkdir .claude
2. Run Claude Code in that directory
3. Execute the /doctor command
4. Observe crash

Expected Behavior

/doctor should either:

• Skip directories when scanning for .claude files
• Use statSync() to check if path is a file before calling readFileSync()
• Handle the EISDIR error gracefully

Actual Behavior

/doctor crashes with:
EISDIR: illegal operation on a directory, read

Root Cause

The code path that reads .claude configuration files doesn't distinguish between .claude as a file vs .claude as a directory. When .claude is a directory (common for storing project-specific commands/config), readFileSync() fails.

Workaround

Added a shell function to temporarily rename the directory before running /doctor:

claude-doctor() {
if [[ -d ".claude" ]]; then
mv .claude .claude-backup
claude /doctor
mv .claude-backup .claude
else
claude /doctor
fi
}

Additional Context

• Project path: /opt/scout/.claude
• The .claude directory is used for project-specific commands per Claude Code documentation

What Should Happen?

/doctor should work in claude code without crashing.

Error Messages/Logs

Steps to Reproduce

Steps to Reproduce

1. Create a .claude directory in your project: mkdir .claude
2. Run Claude Code in that directory
3. Execute the /doctor command
4. Observe crash

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.71

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_