PostSingular: Building an AI with Persistent Identity Across Sessions

Mon, 02 Mar 2026 00:00:00 +0000

The default state of a language model is amnesia. Every session, it wakes up fresh with no memory of what happened before. I built a memory system that fixes this — and somewhere in the process, the agent got a name, a personality, and an opinion about font choices.

The Problem
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Every LLM session is stateless by design. You can inject previous conversation history, but:

Why Vector Memory Alone Isn't Enough: Knowledge Graph Memory for AI Agents

Sun, 01 Mar 2026 00:00:00 +0000

Vector databases are fast and convenient. But they can’t answer “what did I decide about the auth system 3 weeks ago and why?” For that, you need relationships — and that means a knowledge graph.

The Problem with Pure Vector Memory
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Most AI memory systems work like this: embed text, store in ChromaDB, retrieve by cosine similarity. It works well for “find things similar to this query.”

ChromaDB on Amine El Farssi

PostSingular: Building an AI with Persistent Identity Across Sessions

The Problem #

Why Vector Memory Alone Isn't Enough: Knowledge Graph Memory for AI Agents

The Problem with Pure Vector Memory #

The Problem
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The Problem with Pure Vector Memory
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