[BUG] Claude Status line output truncated on Windows - only shows branch name, missing git status info

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?

Using claude code
Claude's status line has been configured to show git status info, same setup has worked reliably on claude in Linux environment, so should display:
(dev *2 ?2)
but shows only
(dev)

The custom status line script output has been verified as outputting the full status information as expected, but this doesn't make it to the status line. bash .claude/statusline.sh

[33m(dev *2 ?2)[0m

Restarting Claude makes no difference.

What Should Happen?

Claude's status line has been configured to show git status info, this has worked reliably on claude in Linux environment, so should display (branch + modified + untracked counts):
(dev *2 ?2)
in yellow/amber colour

Error Messages/Logs

N/A

Steps to Reproduce

1. inside a folder with a git repo

2. use this statusline.sh

#!/bin/bash
# Claude Code status line script - shows git branch and compact status

# Read JSON input (contains cwd, etc.)
read -r input

# Extract working directory from JSON
cwd=$(echo "$input" | sed -n 's/.*"cwd":"\([^"]*\)".*/\1/p')

# Default to current directory if not provided
if [ -z "$cwd" ]; then
  cwd="."
fi

cd "$cwd" 2>/dev/null || exit 0

# Check if in a git repo
if [ ! -d ".git" ] && ! git rev-parse --git-dir > /dev/null 2>&1; then
  printf "$(basename "$cwd")"
  exit 0
fi

# Get git branch
branch=$(git --no-optional-locks branch --show-current 2>/dev/null)
if [ -z "$branch" ]; then
  branch=$(git --no-optional-locks rev-parse --short HEAD 2>/dev/null || echo "unknown")
fi

# Count file changes
modified=$(git --no-optional-locks diff --name-only 2>/dev/null | wc -l | tr -d ' ')
staged=$(git --no-optional-locks diff --cached --name-only 2>/dev/null | wc -l | tr -d ' ')
untracked=$(git --no-optional-locks ls-files --others --exclude-standard 2>/dev/null | wc -l | tr -d ' ')

# Check commits ahead/behind remote
upstream_branch=$(git --no-optional-locks rev-parse --abbrev-ref --symbolic-full-name @{u} 2>/dev/null)
if [ -n "$upstream_branch" ]; then
  ahead=$(git --no-optional-locks rev-list --count @{u}..HEAD 2>/dev/null || echo "0")
  behind=$(git --no-optional-locks rev-list --count HEAD..@{u} 2>/dev/null || echo "0")
else
  ahead="0"
  behind="0"
fi

# Build git info parts with spaces
git_parts="$branch"

# Add ahead/behind info
if [ "$ahead" -gt 0 ] && [ "$behind" -gt 0 ]; then
  git_parts="$git_parts ↑$ahead↓$behind"
elif [ "$ahead" -gt 0 ]; then
  git_parts="$git_parts ↑$ahead"
elif [ "$behind" -gt 0 ]; then
  git_parts="$git_parts ↓$behind"
fi

# Add file status
[ "$staged" -gt 0 ] && git_parts="$git_parts +$staged"
[ "$modified" -gt 0 ] && git_parts="$git_parts *$modified"
[ "$untracked" -gt 0 ] && git_parts="$git_parts ?$untracked"

# Output with parentheses grouping everything together
printf "\033[33m(%s)\033[0m" "$git_parts"

3. use this .claude/settings.local.json

  {
    "statusLine": {
      "type": "command",
      "command": "\"C:\\Program Files\\Git\\usr\\bin\\bash.exe\" .claude/statusline.sh"
    }
  }

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.56

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Environment:

• OS: Windows 11
• Git Bash: C:\Program Files\Git\usr\bin\bash.exe
• Works correctly: Linux terminal (up to date linux mint, using Tilix as terminal)
• Fails: Windows Terminal, VSCode terminal

This appears to be a Windows-specific issue with how Claude Code captures or renders the output from the statusline command.