Observed arrival · 2026-10-27
dotPen: Reviewing AI-Written Markdown on Mac
A free Mac Markdown viewer for following what Claude Code, Codex, and Cursor write, tracking edits, and sending inline comments back.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Mac users reviewing coding-agent plans and handoffs
- Worth noticing
- Comments can be sent as one prompt with the exact lines they reference; MCP-capable agents can also read and resolve them.
Field notes
The described workflow watches folders where agents work and surfaces activity through file indicators and the menu bar. Users can step through edits, accept selected changes, or attach comments to specific lines; the page says those comments can be bundled into a prompt or read through MCP by compatible agents. The homepage specifies macOS 15 or later and presents the app as free, open-source, and account-free.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue