Bash commands with pipes or 'cd && ...' pattern run in background with empty output

Description

Certain bash command patterns are automatically being run in background mode and produce empty output files, causing Claude Code to get stuck.

Commands that fail (run in background with 0 bytes output)

cd /path/to/repo && git diff --stat package.json
git diff package.json | head -20

Commands that work correctly

git -C /path/to/repo diff --name-only
git --version
echo "test"

Observed behavior

1. Commands with pipes (|) or cd ... && patterns trigger automatic background execution
2. The output file is created but remains empty (0 bytes)
3. Claude gets stuck waiting for output that never comes

Example from logs:

Bash(cd /Users/<user>/Documents/github/<reponame>i && git diff --stat package.json)
  ⎿  Running in the background (↓ to manage)

ls -la /tmp/claude/<user>/tasks/b8ab45e.output && wc -l
  ⎿  -rw-r--r--@ 1 tal.green  wheel  0  6 ינו׳ 11:57 ...
            0 /tmp/claude/<user>/tasks/b8ab45e.output

Environment

• Platform: macOS Darwin 25.2.0
• Git version: 2.46.0

Workaround

Using git -C /path syntax instead of cd /path && git works correctly.

🤖 Generated with Claude Code