Margin Editor
Author: OpenAI
A local note-taking app for collaborating with your agent.
Description
Create notes and discuss changes with Codex in the same document. The agent can leave its own comments without impersonating you.
How it uses WebMCP
Codex can create notes, read your comments, and join the discussion under its own identity. WebMCP lets the agent work inside the document you are reviewing, so feedback stays attached to the writing.
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