CartaStudio is a desktop workbench for creating and publishing "Cartas" β curated, sourced knowledge graphs in plain, portable markdown that AI agents read deterministically and that you publish as queryable MCP endpoints. Capture your org's expertise as typed, scoped, sourced decision graphs you own and version in Git β every node tied to a book, DOI, or canonical article. Not auto-extracted, not RAG guesswork: curated, sourced, deterministic.