Component licences
You may use, copy, modify, build, and redistribute the components on this page for any purpose, including inside your own products and Marketplace listings, except a Competing Use. This page names the licence for each component and the first version that carries it. The contracts for the Liskov service are separate, on the legal documents page.
Which licence applies
| Component | Licence | First version under it |
|---|---|---|
Runtime helper, liskov-runtime-contact (liskov-runtime-cargo) | FSL-1.1-Apache-2.0 | v0.11.0. v0.10.43 and earlier stay Apache-2.0. |
Runtime images (liskov-runtime-images) | FSL-1.1-Apache-2.0 for repository-authored build code. Operating-system packages keep the upstream licence of each package. | The next promoted revision. |
Runtime SDK, @proof-computer/liskov-runtime | FSL-1.1-Apache-2.0 | v0.3.34. v0.3.33 and earlier were declared MIT. |
Ingress adapter (liskov-baran-js) | FSL-1.1-Apache-2.0 | From the next release. That release publishes the repository LICENSE file. |
proof CLI and plugins (proof-cli-liskov) | FSL-1.1-Apache-2.0 | From the next release. Each plugin repository publishes its LICENSE file with that release. |
GitHub actions (liskov-github-actions) | FSL-1.1-Apache-2.0 | v2.0.0. |
Self-custody signer (liskov-self-custody-signer) | FSL-1.1-Apache-2.0 | From the next release. v0.2.0 and earlier stay Apache-2.0. |
Secret broker (liskov-secret-broker-js), agent skills (liskov-skills), and Marketplace reference offerings (liskov-marketplace-offerings) | Apache-2.0 | Unchanged. |
The runtime helper is the program inside your image that keeps contact with Liskov. It is separate from the runtime-contact status shown on a deployment.
FSL-1.1-Apache-2.0 is the Functional Source License, Version 1.1, with Apache-2.0 as the future licence. The licensor is Moose Labs Ltd. Read the licence text at fsl.software.
What you may do
You may use, copy, modify, build, and redistribute a component for any purpose other than a Competing Use. That includes running it in your own products and Marketplace listings. Publishing a Marketplace item that bundles the runtime helper or the runtime SDK is permitted. It is not a Competing Use.
The licence defines Competing Use in these words:
A Competing Use means making the Software available to others in a commercial product or service that:
substitutes for the Software;
substitutes for any other product or service we offer using the Software that exists as of the date we make the Software available; or
offers the same or substantially similar functionality as the Software.
Each version becomes available under the Apache License, Version 2.0 two years after it is released. A version released before the move to FSL keeps the licence it shipped with. The two-year period is not shortened or extended.
The published wire contracts stay public. The licence covers the code, not the protocol.