Claude Code Windows Hook Fix

Fix for Claude Code v2.1.x hooks failing on Windows with "No such file or directory" errors.

The Problem

Claude Code v2.1.x on Windows has a critical bug where all hooks fail:

/bin/bash: /c/hooks/stop.sh: No such file or directory

This happens because Claude Code invokes bash without the MSYS environment that provides path translation.

Quick Fix

Run this in Git Bash:

# Backup and patch
cp "$(npm root -g)/@anthropic-ai/claude-code/cli.js" "$(npm root -g)/@anthropic-ai/claude-code/cli.js.backup"

sed -i 's/hB7(V,\[\],{env:F,cwd:j1(),shell:!0})/hB7(process.env.SHELL||"bash",["-l","-c",V],{env:F,cwd:j1(),shell:!1})/g' "$(npm root -g)/@anthropic-ai/claude-code/cli.js"

Or use the included script:

./fix-claude-hooks.sh

What It Does

Changes hook execution from:

spawn(command, [], {shell: true})

To:

spawn(bash, ["-l", "-c", command], {shell: false})

The -l flag runs bash as a login shell, which initializes the MSYS environment including path translation.

⚠️ Important

This patch is overwritten when Claude Code updates. Re-run after updates.

Affected Versions

• Claude Code v2.1.x on Windows with Git Bash
• Confirmed on v2.1.9, v2.1.11

Related

• GitHub Issue #3417
• See skill.md for detailed technical explanation

License

MIT