LatticeDB puts graph, vector, and full-text search in one embedded file
LatticeDB is a single-file, single-writer graph database written in Zig. Its Cypher-like query layer combines graph traversal, HNSW vector search, and BM25 full-text search, while a WAL-backed event log and graph changefeed keep local agent-memory and RAG workloads in one transactional substrate.
The project is explicit about its boundary: it targets one owning process on one machine, not multi-client or distributed deployment. HN commenters focused on subtree permissions and concurrent writers; the author acknowledged that cross-process file locking still needed work and described the single-writer model as deliberate.