[BUG] tooluniverse plugin MCPB fails to extract in Claude Code

## Environment
- **Claude Code version:** 2.1.5
- **OS:** macOS Darwin 25.2.0
- **Plugin:** tooluniverse@life-sciences v1.0.0

## Description
The tooluniverse plugin fails to load - Claude Code cannot extract the MCPB file.

## Error Message
```
Failed to extract MCPB
https://github.com/mims-harvard/ToolUniverse/releases/download/mcpb/tooluniverse.mcpb:
Failed to read or unzip file: Failed to unzip file: undefined is not an object (evaluating 'T.length')
```

## Steps to Reproduce
1. `/plugin marketplace add anthropics/life-sciences`
2. `/plugin install tooluniverse@life-sciences`
3. Restart Claude Code
4. Plugin shows error in `/plugin` menu

## Verification
- MCPB file downloads successfully (3.2MB)
- Manual `unzip -l tooluniverse.mcpb` works - file is valid
- Other MCPB plugins from different marketplaces work fine
- Issue appears specific to this MCPB file's structure/compression

## Questions
1. Is there something unique about how this MCPB was built?
2. Can the MCPB be regenerated with different compression settings?
3. Are other users experiencing the same issue?

## Related
- Claude Code issue: https://github.com/anthropics/claude-code/issues/17697
- MCPB source: https://github.com/mims-harvard/ToolUniverse/releases/tag/mcpb