Lesson of the dayCRS-06 · 10 min
Set Up Cowork
From Claude Cowork: AI for Everyday Work · Meet Your AI Coworker. Get Cowork running on your machine, give it a workspace folder, and verify it can actually work.
The Daily
Vibe
One lesson, one term, one build prompt, one app check — a small fresh slice of the school, same for everyone, new every day. Show up daily and keep your streak alive.
Term of the day01
Perplexity
“How confused the model is”
The exponential of the average cross-entropy loss. Lower is better. A perplexity of 10 means the model is as uncertain as if it were choosing uniformly among 10 tokens at each step.
App check of the day02
Firebase
🔴 Not really. Google's app backend — realtime database, auth, hosting, and functions. — can you vibe code it in multi-day (and you inherit the ops)?
Prompt of the day03
Build a portfolio site
Build my portfolio site as a static Next.js app. Content (real, included below): identity line, bio paragraph, three case studies (each: title, problem, what I did, outcome), and contact links — case studies as markdown files in /content. Aesthetic direction: [name a specific direction + one reference site]. Requirements: semantic HTML, responsive, dark mode following system, real meta/OG tags with a generated OG image, sitemap, and a Lighthouse-100 target (image optimization, no layout shift). No contact form — mailto and socials only. Deployable to Vercel. [paste your content]
Game of the day04
🔄 Loop Order
The steps are scrambled. Drag them into the right sequence — the agentic loop, a red→green fix, a safe refactor. Get the whole run clean for the badge. 4 puzzles. Clear it for XP — flawless runs earn a badge.
Field note pick05
How to Vibe Code a Website: Blank Folder to Live URL (2026)
The complete afternoon project: one agent, one folder, one live URL. Every prompt included, no prior coding required.
Dictionary word of the day06
Memory system
§06 · Memory & Steering
Whatever lets an agent carry information across sessions: notes on disk, a memory directory, a store it reads at startup.