SessionStart hook fails on Windows - superpowers plugin path handling issue

The superpowers plugin's SessionStart hook fails on Windows with a path formatting error.

Environment:

• Claude Code version: 2.1.29
• OS: Windows
• Shell: Git Bash (bash)
• Plugin: superpowers@claude-plugins-official v4.1.1

Error observed:

SessionStart:startup hook error
\bin\bash: C:Users[username].claudepluginscacheclaude-plugins-officialsuperpowers4.1.1/hooks/session-start.sh: No such file or directory

Debug log excerpt:

2026-02-01T07:59:59.389Z [DEBUG] Hook SessionStart:startup (SessionStart) error:
\bin\bash: C:Users[username].claudepluginscacheclaude-plugins-officialsuperpowers4.1.1/hooks/session-start.sh: No such file or directory

Root cause:
The path is malformed - missing backslashes after the drive letter. The correct path should be:
C:\Users\[username]\.claude\plugins\cache\claude-plugins-official\superpowers\4.1.1\hooks\session-start.sh

But bash is receiving:
C:Users[username].claudepluginscacheclaude-plugins-officialsuperpowers4.1.1/hooks/session-start.sh

Impact:

• Error message displayed on every Claude Code startup
• SessionStart hook functionality from superpowers plugin doesn't work on Windows

Workaround:
Add "disableAllHooks": true to settings.json (but this also disables other hooks and statusLine)

Expected behavior:
The hook should execute successfully on Windows with proper path handling.