MPCoreDeveloper 

Munarium pure kernel: the append-only fact ledger, governance gates and context composition, with storage, retrieval and model providers behind interfaces. No HTTP, no provider calls, no database.

Hybrid (lexical + vector) retrieval for SharpCoreDB: runs the BM25 lexical leg and the vector leg and fuses them by rank with reciprocal-rank fusion. Pure managed C# 15 / .NET 11.