Graphiti

The open-source temporal knowledge-graph engine that powers Zep. Real-time knowledge-graph construction for AI agents — stores entities as nodes, relationships as time-bounded edges, and semantic facts as edge attributes. Repository: [github.com/getzep/graphiti](https://github.com/getzep/graphiti). Apache 2.0 license. Designed to be embedded into agent memory pipelines as the relational substrate underneath retrieval, so it can be adopted independently of Zep's full platform.

Most "memory" libraries store retrieval-time semantic vectors but discard the relationship structure that gives memory its discriminative power. Graphiti is the inverse — it preserves the relational structure as first-class data, then layers semantic-vector retrieval on top of the graph rather than instead of it. Agents can ask "what depends on X" and get a deterministic subgraph rather than a vector-similarity guess.

Embedded temporal knowledge graph for agent memory, real-time graph construction from text, time-aware fact storage with `valid_at` / `invalid_at` semantics, Zep's underlying engine for organizations that want graph memory without the full Zep platform.