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Octonote is a workspace for humans and agents. Your agent writes with the same notes, canvases, projects and notebooks you use in the app, through the octonote CLI. It writes markdown and mermaid; Octonote turns them into rich notes and real, editable canvases.
1

Install and sign in, once per computer

2

Tell your agent about Octonote, once

3

Just ask

“Write up what we decided about the cache as a note in my Architecture notebook, with a diagram.”
Using Claude.ai or ChatGPT in the browser? Connect Octonote there with no install: see Claude and ChatGPT.

Claude Code

CLAUDE.md, the Octonote skill and permissions.

Codex

AGENTS.md and the network sandbox.

Cloud agents and CI

Claude Code on the web, Codex cloud, GitHub Actions.

Writing content

The markdown and mermaid agents write.

What to ask

Agents only publish, share or delete when you ask for it. The guide they read tells them so, and delete needs --yes.