OpenAgentSkill Registry Manifest
Skill: Mustangproject
Slug: zugferd-mustangproject
Category: document-processing
Description: Open Source Java e-Invoicing library, validator and tool (Factur-X/ZUGFeRD, UNCEFACT/CII XRechnung)

Agent fit:
- Decision: 83/100 Strong shortlist
- Primary fit: Document processing
- Role: Companion skill

Supply profile:
- Track: Research and knowledge work
- Scenario: Document processing
- Applicable agents: Claude Code, CLI, Codex, Cursor, XSLT
- Maintenance: 1d since push
- Risk: Safe to try

Trust:
- Trust score: 85/100 Strong shortlist
- Audit: 88/100 Safe to try

Attribution:
- Status: Community indexed
- Source: GitHub star discovery
- Creator: ZUGFeRD
- Claim URL: https://www.openagentskill.com/skills/zugferd-mustangproject#claim-this-skill

Install:
npx skills add ZUGFeRD/mustangproject

URLs:
- Web: https://www.openagentskill.com/skills/zugferd-mustangproject
- API: https://www.openagentskill.com/api/agent/skills/zugferd-mustangproject
- Install API: https://www.openagentskill.com/api/skills/zugferd-mustangproject/install
- Repository: https://github.com/ZUGFeRD/mustangproject