Developed and delivered Kommune API v2 in the Skatteetaten/api-dokumentasjon repository, focusing on enhancing the decision model schema for municipal claims processing. The work centered on designing a comprehensive JSON schema that clearly defines required fields and relationships, supporting accuracy and scalability in municipal integrations. Updated API documentation and onboarding materials were provided in Markdown to facilitate developer adoption and integration. The approach emphasized schema-driven design and explicit versioning, improving maintainability and future-proofing for municipal claims workflows. Technical efforts combined API documentation, JSON schema design, and technical writing, resulting in a robust, well-documented foundation for municipal API integrations.