Skill Claude CodeCodex
This skill should be used when the user wants to check whether an EU electronic invoice is compliant: validating an XRechnung, ZUGFeRD, Factur-X, Peppol BIS, or other UBL/CII invoice against authority-pinned rules, and explaining what fails and why. Triggers on phrases like "validate this invoice", "is this XRechnung…
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original MIT