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python-error-handling

Python error handling patterns including input validation

python-error-handling is an agent skill from the wshobson/agents collection for building robust Python applications that validate their input, raise meaningful exceptions and fail gracefully. Good error handling makes problems easier to debug and systems more reliable, and the skill is organized around that goal. Its core idea is fail fast: validate inputs early, before expensive work starts, and where possible report all validation errors together rather than one at a time. The skill covers designing exception hierarchies so an application can tell its own errors apart, handling partial failures in batch operations, where some items succeed and others do not, converting external data into domain types so bad input is caught at the boundary, and building error messages that a user can act on. It applies when validating user input and API parameters, designing exception hierarchies, handling partial failures in batch work, converting external data to domain types, building user-friendly error messages, and implementing fail-fast validation. The guidance is for application code that people depend on, where an unhandled or vague error costs time during an incident. The agent applies the patterns to the code it writes or reviews, and the team confirms that the chosen exceptions and messages fit its own conventions. The skill is installed with the skills CLI from the wshobson/agents repository. Its skills.sh page showed about 13.8K installs and passing results from three security audits at the time of the scan.