The whole menu.
Everything we’ve added to KB Cafe, tools, lessons, guides, and posts, newest first. The homepage shows what’s freshly brewed; this is the full history. All free, no account, all in your browser.
22 items and counting
July 2026
- →New tool
Learning Path Builder
Say a goal, get a custom route through KB Cafe’s real guides, tools, and hands-on exercises. No signup.
- →Blog
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.
- →Lesson
How to prompt Claude Fable 5
Fable 5 rewards fewer instructions, not more. Effort as the main dial, and the migration gotcha that quietly falls back to Opus.
June 2026
- →Lesson
How to build an AI agent
A chatbot answers; an agent acts. The five parts, the loop, the security, and a spec builder.
- →Blog
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.
- →Lesson
Prompt injection & AI security
Why an agent cannot tell your instructions from text it just read, and how to contain it.
- →Lesson
What are AI evals?
Measure whether AI output is actually good. The verify gate, applied at scale.
- →Reference
Build your own agentic OS
A local-first command center for a coding agent: the real primitives, no hype.
- →Lesson
What are AI loops?
Let AI plan, do, and check its own work, with a build-your-own-loop tool.
- →Study tool
AI Flashcards
Spaced-repetition decks built from the dictionary. Free, no account.
- →Downloads
Free resources
Prompt libraries and agent-rule templates. No email wall.
- →Blog
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.
- →Blog
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.
- →Blog
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.
- →Blog
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.
- →Blog
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.
- →Blog
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.
- →Blog
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.
- →Blog
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.
- →Blog
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.
- →Blog
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.
- →Blog
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.
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