Your code works on your machine, but the Moulinette says "KO" (Fail). Usually, this is because:

Phase 1 — Core MVP (6–9 months)

Phase 2 — Expansion (9–18 months)

Phase 3 — Maturity (18–36 months)

When a student is in the assignment screen, they can type a new command:

trace

This launches the student’s compiled code in a "Sandbox Visualizer" (a lightweight Ncurses-based UI overlay within the terminal).

The UI displays three panes:

Halfway through the exam, your screen will freeze, or you will get an "Operation not permitted" error. Do not reboot.

42 Examshell Here

Your code works on your machine, but the Moulinette says "KO" (Fail). Usually, this is because:

Phase 1 — Core MVP (6–9 months)

Phase 2 — Expansion (9–18 months)

Phase 3 — Maturity (18–36 months)

When a student is in the assignment screen, they can type a new command:

trace

This launches the student’s compiled code in a "Sandbox Visualizer" (a lightweight Ncurses-based UI overlay within the terminal).

The UI displays three panes:

Halfway through the exam, your screen will freeze, or you will get an "Operation not permitted" error. Do not reboot.

42 Examshell

Mastermind, 2225 N Scottsdale Rd,
Scottsdale, Arizona, United States.



© 2025 Mastermind.com, LLC. All rights reserved.