# Jesse Liberty > Senior AI Engineer/ Author/ Podcaster/ Videocaster ## Core Content - [YouTube Player - Open Source](https://jesseliberty.com/2026/10/21/youtube-player-open-source/): Today I took my YouTube Player open source under the MIT license. Looking forward to the community contributions and opinions. - [RAG and Microsoft Agent Framework Step By Step (2)](https://jesseliberty.com/2026/10/20/rag-and-microsoft-agent-framework-step-by-step-2/): In a previous blog post I walked through a RAG example using Microsoft Agent Framework so that we could do - [Agentic Table of Contents (so far)](https://jesseliberty.com/2026/07/30/agentic-table-of-contents-so-far/): 1 RAG - A quick example 2 RAG in detail 3 Deeper into RAG 4 The R in RAG 5 - [Adding Cosmos with Spec Kit & Copilot](https://jesseliberty.com/2026/09/18/adding-cosmos-with-spec-kit-copilot/): Yesterday I set out to add Cosmos to my demonstration project. The goal was to keep track of all queries, - [Spec Kit Phases](https://jesseliberty.com/2026/09/20/spec-kit-phases/): I've been writing quite a bit about Spec Kit. Mostly because I can't get over how effective it is when ## Key Topics - [z Silverlight Archives](https://jesseliberty.com/Topics/sl/) - [Essentials](https://jesseliberty.com/Topics/essentials/) - [YapCast](https://jesseliberty.com/Tags/yapcast/) - [Patterns & Skills](https://jesseliberty.com/Topics/patternsandskills/) - [Mini-Tutorial](https://jesseliberty.com/Topics/mini-tutorial/) # Last updated: 2026-10-22T07:30:44+00:00