[BUG]

Environment

• Platform (select one):
• [ ] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ x] Other: Claude Code
• Claude CLI version: 1.0.70
• Operating System: macOS 15.5
• Terminal: Ghostty

Bug Description

When trying to run /security-review I'm getting this error:

> /security-review
  ⎿  Error: Bash command failed for pattern "!`git diff --merge-base origin/HEAD`": [stderr]
     usage: git diff [<options>] [<commit> [<commit>]] [--] [<path>...]

> why isn't security-review working?

⏺ The security-review command has a bug in its implementation. It's trying to use:
  git diff --merge-base origin/HEAD

  But --merge-base is not a valid option for git diff. The correct git commands would be:

  1. git diff origin/HEAD...HEAD (three dots for changes on current branch)
  2. git diff $(git merge-base origin/HEAD HEAD)..HEAD (using merge-base separately)

  This is a bug in the Claude Code security-review command itself. You should report this issue at https://github.com/anthropics/claude-code/issues

  As a workaround, I can manually review your changes for security concerns:

Steps to Reproduce

1. Open Claude Code in CLI
2. type /security-review

Expected Behavior

It should run a security review

Actual Behavior

Getting this error:

Error: Bash command failed for pattern "!`git diff --merge-base origin/HEAD`": [stderr]
     usage: git diff [<options>] [<commit> [<commit>]] [--] [<path>...]