Letter.md
ChatGPT pluginReview Markdown with AI
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Movement
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Rank by placement
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Rank in Productivity
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In its category
How this plugin compares with others in the same category. Positions are counted within the category, not across the whole directory.
Productivity1,323rd of 1,393 by placement
Letter.md lets people read, search, and review Markdown documents from ChatGPT. It can create traceable comments and reviewable edit suggestions, inspect document images, compare versions, and open the complete realtime collaborative editor. With an explicit user request and publication permission, it can publish a document or update its public page; publishing never changes the private source document automatically. Users can also save generated Markdown as a new unpublished document in a writable Letter.md workspace or create a derivative document. Access is limited to the workspaces and scopes approved through OAuth.
Example prompts
- “Review my Q3 Product Brief.”
- “Suggest edits to my document.”
- “Compare my document versions.”
Skills
letter-document-authoring
Use when the user wants to create, find, open, read, or revise a Letter.md document. Guides safe document selection, creation, editor opening, and reviewable suggestions with Letter.md MCP tools.
letter-document-review
Use when the user wants to review, comment on, improve, or check publication readiness for a Letter.md document. Guides evidence-based review, comment reconciliation, and reviewable suggestions without silently editing the document.
- Categories
- Made by
- GUANXUN HUANG · Website
- Sign-in
- On Install
- Availability
- Available
- Version
- 1.0.0
- Created
- July 22, 2026
- More info