01 / Writing

Notes from the build.

Architecture, .NET, cloud, AI, and graph databases — written from production, not theory.

All.NET 8.Net Core 6AI 5C# 4ASP.NET Core 3Graph Databases 3NebulaGraph 3nGQL 3ArangoDB 2Architecture 2Azure 2Graph Database 2Knowledge Graph 2LLM 2MCP 2Postgresql 2Semantic Search 2Tech 2Vector Search 2.Net Core Push Notification 1AWS Deployment 1AWS Lambda 1Access Management 1Agent Framework 1Agents 1Authentication 1Blazor 1CDK 1CORS 1CQRS 1Custom Claim 1EF Core 1Embeddings 1EntraId 1IAC 1IBM MQ 1Infrastructure as Code 1JWT 1MediatR 1Message Queue 1Observability 1OpenAI 1OpenTelemetry 1Postgres 1RAG 1Raspberry Pi 1Rust 1Semantic Kernel 1Windows Universal App 1pgvector 1

Featured · September 23, 2026 · 7 min

Building an Agentic System in .NET, Part 3 — Durable Memory with Postgres and pgvector

Give your .NET agent a long-term memory it can actually recall: model MemoryItem in EF Core, generate embeddings with Microsoft.Extensions.AI, store them in Postgres with pgvector, and build an HNSW cosine index with a ranked recall query that blends similarity, recency, and importance.

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