{"schemaVersion":"1.0","lastVerified":"2026-08-12","entity":{"name":"Calliope","status":"In development","platform":"macOS","category":"Agentic long-form writing app","officialUrl":"https://calliopewriter.com","editorialProfile":"https://calliowriter.com/articles/calliope-ai-writing-app","directAnswer":"Calliope is a macOS writing app built for authors and AI agents to work on the same manuscript. It connects to Codex, stores the manuscript in local files, records saved versions in Git, and can back up the complete history to a private GitHub repository.","facts":{"Supported agent":"Codex now; Claude support is planned for launch","Agent connection":"Model Context Protocol (MCP) server with manuscript-specific tools","Author editing":"The author writes and edits directly in Calliope","Agent work":"Read, analyze, revise, edit, and organize scenes and chapters","Selected-text revisions":"Presented for review before entering the draft","Manuscript storage":"Local Markdown files with structured metadata on the writer's Mac","Version history":"Durable changes recorded automatically in Git","Remote backup":"Optional private GitHub repository","Availability":"In development; public release timing and pricing are not announced"}},"sources":["https://calliopewriter.com","https://calliowriter.com/articles/calliope-ai-writing-app"]}