Cairn — Tab Manager, Workspaces & Session Saver

Cairn is a tab manager for what you're working on right now. Save everything you have open as a named workspace, close it all, and restore the whole session in one click. You have 30 tabs open and can't close them, because closing them means losing them. Cairn turns that pile into workspaces you can put down and pick back up — close everything guilt-free, then get it all back exactly as it was. **HOW IT WORKS** Save what you have open as a named workspace (groups, pinned state, and order all preserved) → close your browser or move on to something else → click Continue whenever you're ready, and every page reopens exactly where you left off. **WHAT ELSE IT DOES** - Universal search — one search box across your open pages, saved workspaces, browsing history, bookmarks, and notes at once. Press / to jump straight to it. - Notes — a workspace carries its own notes, and any saved tab can carry one line saying why you kept it ("password is in the launch doc"). It shows where the address would be, and search finds the tab by it. A week later you still know what that tab was for. - Read later — right-click any page or link to put it on one list, and tick things off as you read them. - Reminders — ask Cairn to bring a workspace back to you later today, tomorrow morning, this weekend, or at a time you pick. It waits for you in the panel and counts on the toolbar icon. - Share a workspace — save it as a file and send it to anyone. They import it and get their own copy, tabs and notes included. Nothing is uploaded anywhere. - Automatic backups — a copy of your workspaces and notes into your own downloads folder, daily or weekly, keeping the last ten. Plain JSON you can read or import anywhere. - Browser cleanup — finds duplicates and stale pages, points out links saved twice in the same workspace, and suggests groups from shared domains and keywords. Nothing closes or rearranges without your explicit confirmation, every time. - Temporary tabs — mark one to expire in an hour, today, tomorrow, or a time you pick, and get a reminder instead of forgetting it in the pile. - Optional AI — summarize a workspace, find themes across it, or spot contradictions. - Crash recovery — Cairn quietly keeps track of what you have open, so if the browser restarts and your tabs don't come back — after a crash, or because Chrome isn't set to reopen them — it can offer them back, including the ones you never saved. Stays on your device, never uploaded, and can be switched off. - A character who reads the room — a small illustrated figure whose expression reflects what's going on: hopeful before you've saved anything, unbothered when things are tidy, and visibly overwhelmed when the tabs pile up. He never speaks, never interrupts, and can be switched off in Settings. **YOUR DATA STAYS ON YOUR DEVICE** No account. No server. No telemetry. Everything Cairn saves lives in Chrome's local storage on your device. Your history and bookmarks are read locally to power search and are never transmitted anywhere. Nothing extra is asked of you at install. Saving backup files and showing reminder notifications are asked for only if you switch those features on, and both work entirely on your own machine. The one exception is the optional AI feature, which is off until you turn it on. It uses your own API key (Anthropic, OpenAI, or a custom or local endpoint), and before any request goes out you are shown the exact text that will be sent — the titles, URLs, and page text from the pages you selected. Nothing is ever sent automatically or in the background. **WHY NOT JUST BOOKMARKS** Bookmarks are for pages you'll want someday. They save one link at a time and lose all arrangement. Cairn saves everything open right now — every page, with its groups, pinned state, and order — restorable in one click. And a bookmark can't tell you why you saved it; a tab note can. **WHY NOT "REOPEN CLOSED TAB"** That only covers the last few minutes. Cairn is named, intentional, and permanent.