[BUG] Bash ! pattern in skills/hooks breaks when working directory changes during session

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?

Description

When Claude Code performs file operations (reads, edits, renames) in subdirectories, the shell's working directory (pwd) can
silently change to a subdirectory. Subsequent ! bash patterns in skills/hooks that use relative paths then fail because they resolve
relative to the new pwd instead of the project root.

## Workaround

Manually cd back to the project root before invoking the skill.

## Environment

• macOS (Darwin 25.3.0)
• Claude Code (CLI) 2.1.59
• Node.js v24.4.1

What Should Happen?

Expected behavior

! bash patterns in skills/hooks should always resolve relative to the project root (the git repo root / initial working directory),
regardless of any pwd changes that happened during the session.

The ! pattern executor should cd to the project root before running the command. This is the cleanest fix since skills/hooks are project-level constructs and should always resolve from the project root.

Error Messages/Logs

Steps to Reproduce

## Reproduction

1. Have a skill/hook that uses a ! bash pattern with a relative path, e.g.:

!node .claude/fwd/bin/fwd-tools.cjs commit-stage

1. During a session, perform file operations in a subdirectory (e.g. rename files in backend/tst/benchmarks/some_dir/)
2. After these operations, the pwd has changed to the subdirectory:

$ pwd
/Users/me/my-project/backend/tst/benchmarks/some_dir

1. Invoke the skill — the ! pattern tries to resolve .claude/fwd/bin/fwd-tools.cjs relative to the subdirectory and fails:

Error: Cannot find module '/Users/me/my-project/backend/tst/benchmarks/some_dir/.claude/fwd/bin/fwd-tools.cjs'

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.59

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_