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The library

Real production incidents. Original test suites. Your turn to command.

Every drill is an engineering challenge created by us or modeled on real production incidents faced by modern tech companies.

1 drill live

Hard

The MCP server that trusts its client

Three tools over a project directory read any file on the host and run any command. They work exactly as documented — that is the problem.

Node.js · MCP · JSON-RPC 2.0 · Security

Clock
45 min
Median
—
Ship rate
—
Attempts
0

How it works

Four steps to prove your AI orchestration mastery.

We don’t measure lines of code. We measure your decision-making under pressure.

  1. 01

    Choose a Drill

    Real production incidents · 45 min max

    Select an infrastructure incident. Each weekly drill features maintainer test suites, seeded data, and real infrastructure.

  2. 02

    Fork the arena

    Public repo · Tests included

    Fork the arena repository. It ships with the source, the maintainer test suites, seeded data and the load harness that decides whether you actually shipped.

  3. 03

    Record Session (Full Screen)

    Max 45 min · Single attempt rule

    Record your full screen, solve it locally with your AI, and make a SINGLE git push when you consider it done. No trial-and-error pushes.

  4. 04

    Human-in-the-Loop Index

    Human reviewed · Orchestration Score

    A person watches your recording and scores it against the public rubric. That score is your Orchestration Index.