Interviews and Capstone
Answer the questions that AI frontend interviews ask, design a chat UI on a whiteboard, review real buggy code, and assemble Mitra, the whole assistant, step by step.
This is the last phase. It does not teach a new tool. It ties the other fourteen together in the four ways you will be tested: interview questions about streaming, state, safety, tools and cost; a frontend system design round ("design a chat UI"); a code review of buggy AI frontend code; and a capstone where you assemble Mitra, the shop assistant, from its parts and watch it work.
Every interview answer names the topic that teaches the mechanism ("Topic 3.1"), so you can go back and practise it. Every claim the browser can show is backed by a live example that runs here, with a failure case next to the happy path, because interviewers like to ask "and what if it goes wrong?".
The capstone is built in five steps and ends with a review checklist. Three live examples carry the steps: the drawing pieces, the chat loop, and the whole app in one file with a scripted visitor who uses it, stops an answer, refuses a cancellation, approves one and runs into a daily limit. Use it as the checklist for your own project.
Practise this phase
Hands-on exercises: write the code, see your page live, and press Check to have it tested automatically.