Build Cython Extensions

This skill provides guidance for building Cython extensions and resolving compatibility issues, with particular focus on numpy version compatibility problems.

When to Use This Skill

• Building or compiling Cython extensions (.pyx files)
• Fixing numpy compatibility issues in Cython code
• Migrating Cython projects to work with numpy 2.0+
• Resolving deprecated numpy type errors (np.int, np.float, np.bool, etc.)
• Troubleshooting Cython compilation failures

Key File Types to Examine

When working with Cython projects, always examine ALL relevant file types: