![Weekly Recap: EF Core Specifications, RAG Security, and C# Pipelines [Sep 2026]](https://devleader-d2f9ggbjfpdqcka7.z01.azurefd.net/media/SquareBanner.webp)
Test EF Core specifications, secure and observe RAG systems in .NET, and build bounded C# pipelines. Plus videos on career choices, leadership, and AI startups.
Learn RAG prompt injection .NET defenses for hostile retrieved content: source admission, provenance, delimiters, least privilege, scanning limits, and tests.
This week covers .NET pipeline design, EF Core specifications, and practical RAG evaluation. Plus videos on AI-assisted development, agentic workflows, and software engineering careers.
Build a trustworthy RAG golden dataset in .NET with versioned evidence, synthetic-case review, human sentinel calibration, and drift-driven refreshes.
Learn RAG evaluation metrics in .NET with Precision@K, Recall@K, MRR, nDCG, groundedness, and answer relevance for clearer, repeatable offline RAG diagnostics.
Learn RAG query transformation in .NET through baseline retrieval, HyDE, step-back abstraction, decomposition, candidate merging, and retrieval evaluation.
This week covers NLog performance and routing, practical C# design patterns, and a stable .NET architecture for RAG and embeddings. New videos dig into AI-assisted workflows, navigating large codebases, burnout, and the path beyond senior engineer.
Learn a stable architecture for RAG and embeddings in .NET, connecting ingestion, retrieval, citations, authorization, evaluation, observability, and deletion.
