Documentation Index
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Z3rno
The database for AI agent memory. Not a framework. Not a feature. Not a bolt-on. A purpose-built database that any agent framework can plug into.
What is Z3rno?
Every AI agent needs persistent memory — to learn, personalise, and maintain context across sessions. Today, agent memory is fragmented across incompatible frameworks with zero compliance. Z3rno is the open-source, PostgreSQL-based memory database that any agent framework can plug into, with enterprise compliance built in from day one.Why PostgreSQL?
- Trusted. 35+ years of production use. Every enterprise already runs PostgreSQL.
- Unified. Vector search (pgvector), graph relationships (Apache AGE), and temporal versioning (SCD Type 2) — all in one database, one query, one transaction.
- Compliant. Row-Level Security, WAL-based point-in-time recovery, audit trails — compliance teams already approve PostgreSQL.
- Familiar. Every DBA knows it. Zero new infrastructure to learn.
The four memory types
Z3rno implements a biologically-inspired four-tier memory model:| Tier | Description | Example |
|---|---|---|
| Working | In-context information for the current task | ”User just asked about pricing” |
| Episodic | Conversation history, event sequences | ”User had a detailed pricing chat on March 15” |
| Semantic | Facts, preferences, learned knowledge | ”User is on the Pro plan, price-sensitive” |
| Procedural | Learned behaviours, workflow patterns | ”When user asks about pricing, emphasise value over cost” |
Get started
Quickstart
Install the SDK, connect to a self-hosted or managed Z3rno instance, and store your first memory in under 5 minutes.