New on KB Cafe: Flashcards, TIL, and Free Resources
Reading something once is where learning starts, not where it ends. The hard part is remembering it a week later, when you actually need it. KB Cafe’s whole bet is learn by doing, so this batch is about the part most sites skip: helping the ideas stick and giving you something to take with you. Three new things went live, all free, all running entirely in your browser.
Flashcards, with spaced repetition
The headliner is AI Flashcards: 51 cards across five decks, covering the core vocabulary of AI and modern development, from tokens and RAG to MCP, vibe coding, and the startup shorthand every builder hears. The decks are built straight from our plain-English dictionary, so the answers are the same clear, one-sentence definitions, no jargon.
What makes it more than a pretty card stack is spaced repetition. Flip a card, rate whether you knew it, and the deck schedules it to come back: a card you nailed reappears in a few days, then a week, then weeks later, while one you missed comes straight back. It is the difference between cramming and actually keeping something. The homepage and Learn hub will quietly tell you when cards are due, so review fits into a minute here and there instead of one doomed marathon session.
A real card. Click it to flip, then rate yourself.
Try all 51 cards, free and no account →It is built the way everything here is: 100% in your browser, no account, nothing uploaded. Your progress and review schedule live in this device’s storage and go nowhere else. You can link straight to a single deck, and every card is also on the page as plain text, so you can just read through a set without studying if that is what you want.
Today I Learned
Not everything needs to be a full guide. Today I Learned is a stream of small, practical things worth knowing: one idea, a little code, no preamble. The kind of thing you wish someone had told you before you spent an afternoon on it.
The first few cover estimating tokens without calling an API, making a model return JSON you can actually trust, streaming a response in the browser, and the two habits that stop you leaking an API key. New ones land at the top, and each has its own link so you can share just the one.
Free resources, no email wall
Some things are more useful as a file you keep than a page you read. The new Free Resources
page has downloadable, evergreen starting points we actually use: a
system prompt library of reusable roles, a
prompt patterns cheat sheet, and an
AI coding agent rules starter you can save as your
CLAUDE.md or .cursorrules. No email wall, no account, no tracking. Download it, open it, copy
from it.
Quietly, under the hood
A couple of changes you will not see but search engines will: the section hubs now ship structured data describing what they list, and the sitemap carries an accurate last-updated date for every page, so fresh content gets noticed faster. None of it changed how anything looks. The promise stays the same as day one: no signups, no cookies, nothing leaves your browser.
Where to start
Open a deck and run through it once; the schedule starts the moment you rate your first card. Skim Today I Learned for something you can use today, and grab a template while you are at it. Same idea as always: you keep this stuff by using it, so we built things to use.