Seal every backup at the source, exactly once.
A back-office PC is the worst place to lose a backup and the easiest place to lose one. at1 sealagent is one small executable that watches the backup folder, hash-chains each nightly file into a per-site ledger, and ships it exactly once — surviving power cuts and dropped links by resuming, never double-sending, and reporting a heartbeat.
- one tiny .exe
- no database, no service sprawl — drop it on the PC and go
- exactly-once
- each nightly file is hash-chained and shipped a single time
- offline-tolerant
- power cut or dropped link mid-run — resumes, never double-sends
- heartbeat
- each site reports in, so a silent PC is visible from the console
Watch & seal
Point it at the folders your nightly backup writes. Each new file is hashed, chained onto the site's ledger, and queued to ship — sealed the moment it lands.
Power-cut tolerant
The back-office PC loses power or the link drops mid-upload. On restart the agent picks up exactly where it stopped — no gap, no duplicate.
Heartbeat & status
Every site checks in on a schedule. A PC that goes dark stops reporting, so a missed backup is something you can see instead of discover later.
On the back-office PC
# one-time: point the agent at the backup folder and the upload target at1 sealagent init-config # run it as a watcher: seal + ship each new nightly file, exactly once at1 sealagent run # or process whatever is already sitting there, once, and exit at1 sealagent once # check what's been sealed / shipped, and confirm the chain is intact at1 sealagent status at1 sealagent verify
Honest scope
The agent seals and ships what already lands in the folder — it is not itself the backup job, and it can only vouch for files it saw. Exactly-once, resume-after-crash and tamper-evident chaining are designed to hold through power loss and dropped links; the right proof is your acceptance test on real data — pull the plug mid-run on your own PC and confirm the ledger reconciles. Validated on synthetic nightly workloads; partner acceptance on live sites is pending.