Bash tool: unquoted temp path causes 'Permission denied' on Windows with spaces in VSCode path

Bug Description

Every Bash tool invocation produces the error:

/usr/bin/bash: line 1: /c/Program: Permission denied

The exit code is always 1 (even when the actual command succeeds), and all output appears doubled.

Root Cause

The extension appends a pwd -P >| <temp_path> suffix to every bash command to track the current working directory between invocations. The temp path is derived from VSCODE_PORTABLE / VSCode's data directory and is not quoted in the bash command string.

The full BASH_EXECUTION_STRING looks like:

source /c/Users/<user>/.claude/shell-snapshots/snapshot-bash-<id>.sh \
  && shopt -u extglob 2>/dev/null || true \
  && eval '<user_command>' \< /dev/null \
  && pwd -P >| /c/Program Files/VSCode/data/tmp/claude-c40c-cwd

The last part is the problem:

pwd -P >| /c/Program Files/VSCode/data/tmp/claude-c40c-cwd

Bash parses this as:

• pwd -P >| /c/Program (redirect stdout to /c/Program, which is a directory → Permission denied)
• Files/VSCode/data/tmp/claude-c40c-cwd (treated as a separate command)

Expected Behavior

The temp path should be quoted:

pwd -P >| "/c/Program Files/VSCode/data/tmp/claude-c40c-cwd"

Environment

• OS: Windows 11 Pro (Git Bash / MSYS2)
• VSCode: Portable installation at C:\Program Files\VSCode\ (path contains a space)
• VSCODE_PORTABLE: C:\Program Files\VSCode\data
• Claude Code Extension: v2.1.49 (win32-x64)
• CLAUDE_AGENT_SDK_VERSION: 0.2.49
• Shell: /usr/bin/bash (Git Bash)

Reproduction

1. Install VSCode (portable or regular) in a path containing spaces (e.g. C:\Program Files\VSCode\)
2. Install the Claude Code extension
3. Run any Bash tool command (even /usr/bin/true)
4. Observe: exit code 1, "Permission denied" error, doubled output

Impact

• Every Bash command reports exit code 1 regardless of actual success
• Error message on every command (cosmetic but confusing)
• Output appears doubled
• Any logic depending on exit codes is broken

Workaround

Install VSCode in a path without spaces (e.g. C:\VSCode\).