What’s new.
Every new tool, course, guide, and post, newest first. Want it delivered? It’s the same stream as our RSS feed, so subscribe in any reader and new launches show up automatically.
Subscribe via RSS- New on KB Cafe: Practice in Every Lesson, Capstones, and a Path Builder
Our biggest update yet: interactive practice interleaved into lessons (try it live in the post), build-this capstones on every path, a streak and XP system, a learning path builder that composes real vetted pages, and two new guides. All free, no account, in your browser.
- What Actually Happens When Anthropic Goes Down?
When Claude has an outage, dozens of AI tools degrade at once while their own status pages stay green. What an upstream provider outage looks like, why it's so confusing to debug, and how to tell in seconds whether it's you, your tool, or the model underneath.
- New on KB Cafe: Flashcards, TIL, and Free Resources
Three new ways to make AI knowledge stick: spaced-repetition flashcards built from the dictionary, a Today I Learned stream of bite-size snippets, and free downloadable templates with no email wall. All client-side, no account.
- Learn to Code With AI, Hands-On
New: a Coding with AI track with an interactive prompt builder and a spot-the-hallucination exercise, an MCP servers lesson with a match-the-server quiz, and a CSS starter with a live editor. Built to be used, not just read.
- Meet the Study Window: Read Two Pages at Once
A resizable second window that docks on the right so you can keep the knowledge map, a reference, or a tool open beside whatever you are reading. How it works, how to open it, and when it earns its keep.
- New to AI? We Built a Beginner's Guide That Starts From Zero
A complete, no-jargon guide to AI for people with zero background, plus an easy way to share it with anyone who wants to learn the simplest way possible.
- How an AI Agent Blanked 26 Files, and the One Question That Saved Me
A postmortem: an AI coding agent null-wrote 26 of my source files. Why git only saved half, how I rebuilt the rest from build output and verified every byte, and the rule I locked in.
- Feed Preview
Paste an RSS or Atom feed and read it as a clean, human-friendly list, fully in your browser.
- RSS → JSON
Turn any RSS or Atom feed into clean JSON for your app, no server round-trip.
- How We Built the Prompt Optimizer: Six Tools Into One
We turned six focused prompt tools into one flagship, without deleting any of them. The real product decision behind composing tools into a mega-tool.
- Introducing AI Business, and Building in Public
We've opened a new section, AI Business, to cover the half of the journey nobody teaches honestly: getting traffic and making money. Plus our first case study is live.
- The Blog That Used to Live at This Address
Before KB Cafe was an AI knowledge base, this domain ran one of the early web's RSS blogs. The story of iBLOGthere4iM, and where it lives on.
- KB Cafe has its own RSS feed
Fitting for an RSS-era domain: subscribe in any reader and new tools, courses, and posts arrive automatically.
- Learn AI Agents
A free, hands-on path from idea to a working agent architecture, each step pairing a concept with a tool.
- Learn AI Infrastructure
The building blocks of modern AI, from context windows to agents, in order.
- Knowledge Map
An interactive graph of every concept, tool, and lesson, and how they connect.
- Context Budget Analyzer
See exactly what fills a model’s context window, ranked by the biggest offenders.
- The Return of KB Cafe
kbcafe.com was a go-to developer resource in the early 2000s. Here's what it is now, and why we brought it back.
- AI Explained
Plain-English explainers for MCP, RAG, embeddings, tool calling, structured outputs, and more.
- RSS Didn't Die, The Open Web Just Got Quiet
Everyone declared RSS dead a decade ago. It's quietly running newsletters, podcasts, and the fediverse the whole time.
- Feeds for Machines: RSS as the Structured Layer for AI
LLMs are starving for clean, structured, permissioned content. A 25-year-old format turns out to be a good answer.