TypeGraph – Type-safe graphs on Postgres/SQLite (no graph DB required)
Hi HN, I built TypeGraph, a type-safe knowledge graph library that runs on your existing Postgres or SQLite. After years of building knowledge graphs and other graphy things, I had the same issues whenever an application’s relationship modeling (permissions, RAG context, recommendations) outgrew standard ORMs: deploy a dedicated graph database (heavy ops, separate infra, data syncing headaches), or roll a graph-in-SQL implementation by hand. I've hand-rolled enough of these to know the drill: same table structures, same traversal boilerplate, same performance surprises. I wanted graph…
TypeGraph – Type-safe graphs on Postgres/SQLite (no graph DB required) launched on February 24, 2026 with 5 votes, #1,883 of 16,628 launches that month and more than 75% of that year's launches.
What it does
Embedded knowledge graph for TypeScript. Define your ontology with Zod, query with a fluent builder, blend BM25 fulltext with vector similarity, and extend the schema at runtime when your agents need more. Runs on SQLite or PostgreSQL.
Define your ontology with Zod. Query with a fluent builder. Extend it at runtime when your agents need more. import { defineNode, defineEdge, defineGraph, createStore } from "@nicia-ai/typegraph" ; import { z } from "zod" ; // 1. Define your ontology const Person = defineNode( "Person" , { schema: z.object({ name: z.string(), role: z.string() }) }); const Project = defineNode( "Project" , { schema: z.object({ name: z.string(), status: z.string() }) }); const worksOn = defineEdge( "worksOn" ); const graph = defineGraph({ id: "my_app" , nodes: { Person: { type: Person }, Project: { type: Project } }, edges: { worksOn: { type: worksOn, from: [Person], to: [Project] } } }); // 2. Query with…from typegraph.dev
In the maker’s words, at launch
Hi HN, I built TypeGraph, a type-safe knowledge graph library that runs on your existing Postgres or SQLite. After years of building knowledge graphs and other graphy things, I had the same issues whenever an application’s relationship modeling (permissions, RAG context, recommendations) outgrew standard ORMs: deploy…
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