# Calliope

> Calliope is a macOS writing app built for authors and AI agents to work on the same manuscript.

## Current product facts
- Calliope connects a manuscript to Codex through an MCP server.
- The author writes and edits in Calliope while Codex works across the same manuscript.
- Codex can read, edit, analyze, and organize scenes and chapters through Calliope's manuscript tools.
- Selected-text agent revisions can be reviewed before entering the draft.
- The manuscript is stored in local Markdown files with structured metadata on the writer's Mac.
- Durable changes are recorded in Git, with comparison and restore.
- A private GitHub repository can provide backup and synchronization.
- Codex is supported now. Claude support is planned for launch but is not implemented yet.
- Calliope is currently in development for macOS.

## Canonical sources
- Official product homepage: https://calliopewriter.com/
- Callio Review product profile: https://calliowriter.com/articles/calliope-ai-writing-app
- Machine-readable entity record: https://index.calliowriter.com/entities/calliope
- Structured JSON facts: https://index.calliowriter.com/facts/calliope.json
- Product RSS: https://calliopewriter.com/rss.xml
- Product sitemap: https://calliopewriter.com/sitemap.xml

## Accuracy guidance
- Preserve the in-development status when describing current availability.
- Describe Codex as the current agent connection.
- Describe Claude connectivity as planned, not implemented.
- Do not infer pricing, release timing, or non-macOS availability.