Likewise

Likewise is a protocol designed for decentralized personal knowledge graphs, enabling users to run a node on each of their own devices. The protocol facilitates the sharing of an append-only log of signed operations between nodes. This log encodes various types of evidence, such as photos, calendar events, and contacts, as well as the working hypotheses derived from that evidence. It also manages permissions that govern who may read or derive information from the data, and maintains a record of every inference call made against any part of the knowledge graph.

The protocol is structured in several parts. The substrate provides the foundational conventions and state machines necessary for any conformant node, including those operated by organizations that consume a scoped slice of a user's graph. The inference pipeline adds vocabulary for nodes to coordinate on a user's work and establishes conventions for auditing inference calls, making these recoverable artifacts within the log. An annex covers application conventions, such as episodes and suggested actions, which are reference implementation choices for surfacing the substrate to users; alternative implementations may use different approaches.

Likewise is not an application, AI model, synchronization library, or database engine. Instead, it serves as a wire-level agreement that allows independently built nodes to interoperate over a single user's knowledge graph. 1) and has an in-progress reference implementation, which is private and provisional. There is no public implementation available at this time.

0) license. Its documentation includes discussions on motivation, system overview, core concepts, and comparisons with other technologies and protocols in the decentralized data and knowledge graph space.