The short version
Silo Skills collects no data. None.
No analytics. No telemetry. No account. No personal data. No usage metrics. No error beacons. No advertising IDs. No fingerprinting. No crash reports. No data of any kind is collected, stored, transmitted, or shared by Silo Skills about you, your Mac, or your files.
It has no network access at all
This is stronger than a promise not to transmit. Silo Skills ships with three sandbox entitlements and none of them is a networking entitlement:
com.apple.security.app-sandbox— required for Mac App Store distribution.com.apple.security.files.user-selected.read-write— read and write the folders you pick yourself.com.apple.security.files.bookmarks.app-scope— remember that choice across launches, so you are not asked again.
Without com.apple.security.network.client the App Sandbox refuses outbound connections, and without com.apple.security.network.server it cannot listen for inbound ones. There is no local runtime, no loopback service, and no bundled server. The app is a single native process that reads and writes files.
What it reads, and only when you say so
Silo Skills starts with access to nothing. You grant a folder through the standard macOS open panel, and macOS hands the app a security-scoped bookmark limited to that folder. Inside it, the app reads agent skill definitions, instruction files, custom prompts and Model Context Protocol server configurations in order to index and compare them. Those files stay where they are. Reading is automatic; writing, moving and deleting happen only when you initiate them, and a snapshot is written first.
On-device data it creates
The index, your granted-folder bookmarks, and the snapshot archive live inside the app sandbox at ~/Library/Containers/com.silosystems.siloskills/Data/. They are yours; there is no copy anywhere else, because there is nowhere else. Removing the app bundle may leave sandbox data in place, so use the in-app delete controls first if you want it gone.
Outbound traffic you initiate
There is none from the app. Two things touch the network on your behalf and neither involves Silo Skills:
- App Store updates. When Apple ships an update, the App Store delivers it. That traffic is between your Mac and Apple.
- Links you click. A link opens in your default browser, which is a separate application.
Third-party components
Silo Skills uses Apple system frameworks only. There are no third-party SDKs, no analytics libraries, no crash reporters, and no bundled models.
Children's privacy
Silo Skills is rated 4+. Because no personal data is collected from any user, no special treatment is required for users under 13. The same policy applies regardless of age: nothing collected.
Changes
If we ever materially change how Silo Skills handles data, we will publish an updated version of this page, announce the change prominently in the release notes, and require explicit consent in-app before any new collection begins. The current policy is: nothing is collected.
Contact
Questions about this policy: admin@ohmslaw.net