Python Error Handling skill: what it does and how to install it

What it does. Guides Python error-handling design with early input validation, domain-type conversion, Pydantic models and specific exception types. It also covers preserving exception context, processing batches with partial failures, documenting failure modes and testing error paths.

When to use it. When validating inputs, designing exception hierarchies, converting external data, building APIs or handling batch-operation failures. Detailed worked examples are available separately when the summary patterns are insufficient.