Learnhttps://blog.felesh.ai/https://blog.felesh.ai/foundations/probabilistic-frame/https://blog.felesh.ai/foundations/probabilistic-frame/You trusted a confident AI answer the way you'd trust a calculator. Then you discovered it was wrong. Here's why that keeps happening, and what to do about it.Fri, 10 Jul 2026 00:00:00 GMThttps://blog.felesh.ai/foundations/three-eras/https://blog.felesh.ai/foundations/three-eras/People have heard 'AI is here' before — and watched the wave break. Here is what actually changed this time, told as a story of who does the learning.Fri, 10 Jul 2026 00:00:00 GMThttps://blog.felesh.ai/foundations/words-map/https://blog.felesh.ai/foundations/words-map/When someone says 'let's just use AI,' they might mean five different things — and building on the wrong one wastes months.Fri, 10 Jul 2026 00:00:00 GMThttps://blog.felesh.ai/model-selection/grading-what-you-cant-exact-match/https://blog.felesh.ai/model-selection/grading-what-you-cant-exact-match/Your assistant gave the right answer. The test marked it wrong. Exact-match scoring breaks the moment output becomes open-ended — here's what to use instead, and where it also fails.Thu, 09 Jul 2026 00:00:00 GMThttps://blog.felesh.ai/agent-architecture/how-agent-teams-coordinate/https://blog.felesh.ai/agent-architecture/how-agent-teams-coordinate/When several specialists must cooperate, the wiring between them is the whole problem. Here are the shapes available, and how to choose.Thu, 09 Jul 2026 00:00:00 GMThttps://blog.felesh.ai/fine-tuning/how-rag-actually-works/https://blog.felesh.ai/fine-tuning/how-rag-actually-works/Your RAG demo answered beautifully in the meeting. In production it confidently cited a document from three quarters ago. Here is what is really happening under the hood.Thu, 09 Jul 2026 00:00:00 GMThttps://blog.felesh.ai/doors/what-agentic-actually-means/https://blog.felesh.ai/doors/what-agentic-actually-means/The word "agentic" is now on everything — chatbots, if-statements, RAG pipelines. Before you can evaluate any of it, you need the distinction.Thu, 09 Jul 2026 00:00:00 GMThttps://blog.felesh.ai/agent-architecture/you-might-not-need-an-agent/https://blog.felesh.ai/agent-architecture/you-might-not-need-an-agent/Reaching for an autonomous agent when the path is already known is the most common way to build something expensive that a simpler workflow would have handled better.Thu, 09 Jul 2026 00:00:00 GMThttps://blog.felesh.ai/foundations/from-llms-to-agents/https://blog.felesh.ai/foundations/from-llms-to-agents/A language model, at heart, just guesses the next word. Here's how that simple guess becomes an agent once you add tools, memory, and planning — and where you actually need one.Sun, 21 Jun 2026 00:00:00 GMThttps://blog.felesh.ai/prompting/how-agents-remember/https://blog.felesh.ai/prompting/how-agents-remember/A language model has no memory of its own and begins each conversation from scratch. What gives an agent memory is the layers built around the model.Sun, 21 Jun 2026 00:00:00 GMThttps://blog.felesh.ai/agent-architecture/how-agents-think/https://blog.felesh.ai/agent-architecture/how-agents-think/An agent takes a goal, reasons, acts, and observes the result — repeating that loop until it's done. A simple mental model for how agents reason and decide.Sun, 21 Jun 2026 00:00:00 GMThttps://blog.felesh.ai/prompting/prompt-engineering-from-zero/https://blog.felesh.ai/prompting/prompt-engineering-from-zero/A language model can't read your mind. Everything you'd take for granted in a casual chat has to be stated outright in the prompt — the six components that make a good one, and the five mistakes beginners make.Sun, 21 Jun 2026 00:00:00 GMThttps://blog.felesh.ai/agent-architecture/single-agent-vs-multi-agent/https://blog.felesh.ai/agent-architecture/single-agent-vs-multi-agent/Sometimes a single agent is the best answer, and sometimes the work should be split across several. The deciding factor is the complexity of the task, not how advanced the architecture looks.Sun, 21 Jun 2026 00:00:00 GMT