← All demos

Build, the coding surface — a Citadel-inspired C++ matching engine, taught line by line

The AI teaching IDE walked end to end on the most-enrolled coding project in the catalog: a price-time-priority order matching engine inspired by Citadel Securities. A Socratic tutor and a scripted student argue through the actual code while the editor highlights the exact lines under discussion; understanding is checked in-line with multiple-choice, free-form, and write-the-code-yourself questions graded by the tutor; a wrong answer gets called out and retried; and the learner can interrupt at any time to ask the tutor anything, grounded in the real files. Closes on the built-in narrated voice-over and the XP ladder. Narrated.

4:582026-08-13Narrated

Chapters

What this demo covers

  • The catalog — real projects tagged to real employers
  • Socratic dialogue: a tutor and a student voice, streaming
  • The editor highlights the exact lines the tutor is teaching
  • In-line checks: wrong answer → honest feedback → retry
  • Write the method yourself before seeing the tutor's version
  • A hint ladder when you want it, an AI grade when you submit
  • Ask the tutor anything — @-mention any project file
  • Built-in voice-over with word-by-word karaoke
  • XP, levels and streaks as the project grows