Verification substrate for AI coding agents
Cairn is a small Go binary that gives AI coding agents durable memory, append-only verdicts, content-addressed evidence, and safe concurrency — the primitives they need to actually finish work without having every claim re-checked. It composes with Superpowers (or any methodology layer) to give agent work a verdict-backed audit trail.
| Publisher | ProductOfAmerica |
|---|---|
| Version | 0.5.0 |
| Release date | 2026-04-21 |
| License | MIT |
| Installer type | zip |
| Architecture | x64 |
| Package ID | ProductOfAmerica.cairn |
winget install --id=ProductOfAmerica.cairn -ewinget upgrade --id=ProductOfAmerica.cairn -ewinget uninstall --id=ProductOfAmerica.cairn -ecairn adds this command to the command line: cairn.
Yes. cairn is free and open-source software released under the MIT license.
The latest version is 0.5.0, released on Apr 21, 2026.
The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with f57571100a9454a922f798a93663ba56dc4b3ede1d4e50a950f9cb3817d2f3d6.
cairn runs on Windows and is available for 64-bit (x64) systems.
Open Settings › Apps › Installed apps, find cairn and select Uninstall. From the command line, run winget uninstall --id=ProductOfAmerica.cairn -e.
Yes. cairn is available as a portable ZIP archive (cairn_0.5.0_windows_amd64.zip, 64-bit (x64)) that runs without installation. Copy it to any folder or USB drive and run it from there.
Other AI for Productivity programs for Windows from different developers.
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