[BUG] Bash tool cwd set to local plugin marketplace directory instead of invocation directory

Bug Description

When a local directory plugin marketplace is configured in ~/.claude/settings.json via extraKnownMarketplaces, the Bash tool's shell session starts with its cwd set to that marketplace directory instead of the directory where claude was invoked.

Steps to Reproduce

1. Configure a local plugin marketplace in ~/.claude/settings.json:

``json
{
"extraKnownMarketplaces": {
"my-marketplace": {
"source": {
"path": "C:\some-other-directory",
"source": "directory"
}
}
}
}
``

1. Open a terminal and cd C:\dev (or any directory)
2. Run claude from that directory
3. In the session, run the Bash tool with pwd

Expected Behavior

pwd should return /c/dev (the directory where claude was invoked).

Actual Behavior

pwd returns /c/some-other-directory (the local plugin marketplace path). The marketplace directory also appears as an "Additional working directory" in the session environment.

Impact

• Any git commands run early in the session operate on the wrong repository
• File paths are resolved relative to the wrong directory
• The system prompt says "Primary working directory: C:\dev" but the shell is actually in the marketplace directory, creating a confusing inconsistency

Environment

• Claude Code CLI (terminal invocation)
• Windows 11
• Shell: Git Bash (bash)
• The marketplace directory (C:\axiomclaudemarket) is a git repo, which may be relevant to why it gets selected as cwd

Workaround

Running cd /c/dev in the first Bash call corrects the session, but it's easy to miss that the cwd is wrong since the system prompt lists the correct primary working directory.