# demo-bad-input > A skill that requires a missing input file to trigger validation failure. - Author: Joshua Reed - Repository: leike0813/Skill-Runner - Version: 20260126103248 - Stars: 1 - Forks: 0 - Last Updated: 2026-02-06 - Source: https://github.com/leike0813/Skill-Runner - Web: https://mule.run/skillshub/@@leike0813/Skill-Runner~demo-bad-input:20260126103248 --- --- name: demo-bad-input description: A skill that requires a missing input file to trigger validation failure. --- # Demo: Bad Input This skill requires an input file. ## Inputs - `{{ input.input_file }}`: Required input file. ## Instructions 1. Attempt to read the input file. 2. If the file is missing, stop immediately. ## Result Format Output any JSON object.