Margin

Your coding agent writes HTML. Now your team can comment on it — like Notion or Google Docs. Claude Code, Codex, and the rest now ship your plans, specs, ADRs, and reports straight to HTML — not a Notion doc, not a Google Doc. Margin is a browser extension that drops inline, anchored comments onto any of those pages. Highlight a line, @mention a teammate, resolve the thread. Zero changes to the page. And it isn't only for AI output — Margin works on ANY web page your browser can open: a local file:// the agent wrote, a preview deploy, an internal dashboard, an article, a competitor's page. If you can see it in a tab, your team can comment on it. WHAT YOU GET • Anchored comments — threads stick to the exact line and float beside it • @mentions & email invites — scoped to your organization, never a public link • Resolve workflow — close the loop and move handled threads to History • My Inbox — mentions, replies, and unread comments in one place • History & full-text search across your organization • Browser & Web Push notifications out of the box — get pinged even when the tab is closed NO CODE ON THE PAGE Unlike a website comment widget, the page author changes nothing. The browser extension is the entry point — even pages you don't own become commentable. It's a web annotation layer that lives in your browser, not a script the site has to embed. ORGANIZATION IS THE BOUNDARY The same URL in two organizations is two completely separate sets of threads. @mentions and invites stay inside your organization. Client A's feedback never lands in client B's space. This is what a generic web annotator (and most "Hypothesis alternative" tools) miss: real team review needs a private boundary, not a public layer. PERFECT FOR • Reviewing implementation plans & specs from Claude Code / Codex • ADRs and architecture docs your agent generated • PRD, design, and QA walkthroughs as a team • Preview deploys, internal tools, and any page in a tab HOW IT WORKS 1. Add to Chrome and pick your organization. 2. Open any page — a local HTML file, a preview URL, anything. 3. Highlight a line and leave an anchored comment. 4. @mention a teammate (or their email to invite them) and resolve when it's handled. Free to start. Add to Chrome and comment on your first page in under a minute. Learn more: https://margindoc.dev/?utm_source=chrome_store&utm_medium=listing&utm_campaign=cws_launch