The setup script only installed requirements.txt dependencies but not the local package itself, causing MCP servers to fail with ModuleNotFoundError. Changes: - Add `pip install -e .` for servers with pyproject.toml - Add viz-platform and contract-validator to MCP server setup - Add symlink verification for new plugins - Update version banner to v5.0.0 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>