Why I Don't Use LangChain (and What I Do Instead)

I'm a .NET developer. When I started building LLM-powered systems, everyone pointed me toward LangChain. "It's the standard," they said. "All the examples use it." And they were right - if you're in the Python ecosystem, LangChain is everywhere. But here's the…

Multiplatform AOT with SQLite: How to get it working!

Native AOT promises to turn your .NET applications into tiny, self-contained executables that start instantly and run anywhere—no runtime installation required. It's magic when it works. But add SQLite to the mix and suddenly you're debugging cryptic…

Building a "Lawyer GPT" for Your Blog - Part 9: Document Ingestion with Docling

Welcome to Part 9! In previous parts, we've built a robust RAG system that processes markdown blog posts and makes them searchable through semantic embeddings. Now it's time to expand our capabilities with Docling - a powerful document processing library that…

mostlylucid.ephemeral.complete; a strange concurrent systems pattern system in an LRU cache.

Well this has been my obsession for the past week. See the previous parts and what led to this; 'What if an LRU was an execution context.'. Now it's a set of 30 Nuget packages covering most major concurrent execution patterns (in TINY 5-10 line packages). Get…

Building a Frontend Before the API is Ready: Without Brittle Fixtures

How many times have you been blocked waiting for backend APIs to be ready? Or spent hours maintaining brittle mock data that becomes stale the moment requirements change? Enter mostlylucid.mockllmapi - a production-ready ASP.NET Core mocking platform that uses…