Config Schema Migrator Skill

When to Use This Skill

Activate this skill when you need to:

• Evolve Pydantic configuration schemas (add fields, change types, restructure sections)
• Maintain backward compatibility with existing config files
• Write migration scripts to automate config updates
• Implement environment variable substitution in config fields
• Add deprecation warnings for old config patterns
• Validate config schemas with field validators
• Create discriminated unions for config type discrimination

Key Principles