Memory & process radar
RAM, swap and CPU deltas by process group, with a rolling 4-minute chart — find the one tab hoarding 4 GB and end the whole group safely.
A Windows guardian, not a cleaner
Cairn watches memory and disk in real time, finds the dev caches quietly eating your drive, locks the folders you can’t afford to lose at the NTFS level — and archives every change one-way to your cloud. Small, native, always on.
Free & open source (MIT) · ~45 MB resident · no account, no telemetry
One small tray app covers the four ways work actually disappears: memory pressure, runaway caches, accidental deletion, and the day a drive just… empties.
RAM, swap and CPU deltas by process group, with a rolling 4-minute chart — find the one tab hoarding 4 GB and end the whole group safely.
A single-pass parallel scan maps your drive into a clickable treemap and tags
node_modules,
target/, venvs and WSL disks as rebuildable
— never your source.
Protected folders refuse deletion at the filesystem layer — Explorer, scripts and WSL all get Access denied. Timed unlocks re-lock themselves.
More than 20 deletions in 3 seconds trips the alarm and re-locks every vault folder. One-way rclone backup archives every change — never a mirror.
Drop folders into the vault — code, keys, photos, the directory you’d rebuild your life from. A cairn marks the route; Cairn marks the assets.
Deny-delete ACLs intercept deletes before they happen — not a recycle-bin trick, an NTFS rule the OS itself enforces.
Every change copies to your rclone remote — Google Drive, OneDrive, S3 — with replaced files tucked into a dated archive. Deleting locally never deletes the cloud.
Open core · pay once
The guardian is MIT open source — audit every line, build it yourself. Pro is a one-time unlock for the disaster-prevention layer: bring-your-own-cloud backup, the kill switch, unlimited vaults. No subscription, no server fees — your cloud, your files.
$0 forever
$19 one-time · lifetime unlock
.env keys, big media librariesSecure checkout via Stripe · license key emailed instantly
“It never mirrors. It never deletes remotely. It never lets go.”
Windows 10 / 11 · x64 · free & open source