MCP
Connect your manuscript to your agent
Calliope and Codex work on the same manuscript.
Files on your Mac · Git-backed · Built for macOS
A writing app built for you and your AI agent.
Write your manuscript, ask AI agents to analyze or revise it, review their changes, and return to any earlier version.
Chapter 07 · Working draft
The crossing
At dawn the ferry wore a veil of river fog. Mara kept one hand on the letter in her coat, as if the paper itself might choose to leave.
The bell rang once. Behind her, the town reduced itself to roofs, smoke, and a promise she had not made.
Revision proposal ready · Review 3 changes before applying
MCP + Git
Work with your agent. Keep the full history.
Calliope connects your manuscript to Codex and records every saved change in Git.
Git
Return to any earlier version
Calliope records each saved change in the manuscript’s Git history. Compare versions, restore earlier work, and keep a private backup on GitHub.
Take your manuscript further.
Work with an agent to solve problems in your draft, revise prose, and keep an evolving manuscript organized.
Work with an agent across your manuscript
Codex can read, edit, and organize scenes and chapters through Calliope.
Review your agent’s edits
Your agent proposes an edit, and you choose what goes into your draft.
Local files with Git history
Your manuscript stays on your Mac, every version is saved, and you can keep a private backup on GitHub.
The working rhythm
Write, ask, inspect, decide.
Write your manuscript
Draft scenes and arrange them into chapters.
Prompt your agent on any selection
Select any text and tell your agent what to change.
Review your agent’s edits
Your agent proposes an edit, and you choose what goes into your draft.
A small, thoughtful first group
Help shape Calliope.
Join the list for early access, launch discounts, and an invitation to the Calliope Discord.