dont-break-prod
agents are shipping more code than ever

A New Way to Train
for Prod

Sharpen the one skill AI can't automate: judgment. Read the contract, read the agent's PR, and decide — ship it or don't. Get an instant verdict.

Start practicingEnter arcade

how it works

Four moves. One call.

01

Read the contract

The spec, the invariants, the guarantees the code must uphold.

02

Read the PR

The agent's diff. Terse commit message. Confident tone.

03

Compare them

Line by line. Does the change actually honor the contract?

04

Ship it or don't

Instant verdict. See where you were right — or hilariously wrong.

two ways to play

Pick your battle.

Practice

Browse the full library. No timer, no stakes. Reveal the answer whenever you want and dig into the reasoning.

  • · Filter by difficulty and category
  • · Play at your own pace
  • · Ideal for warm-ups and study
Open library
weekly

Arcade

Five scenarios served back-to-back. No browsing, no rerolls. Speed and accuracy both count.

  • · 5 fresh scenarios each week
  • · Live weekly leaderboard
  • · One attempt. Make it count.
Enter arcade

why dont-break-prod

Built for the review, not the write.

Real PRs

Scenarios drawn from the diffs agents actually open. Off-by-ones, missed contracts, plausible-looking regressions.

Instant verdict

Ship or block, then see the reasoning. No waiting for the CI-check-of-truth.

Your record

Track accuracy, streaks, and weekly rank. Prove you can spot a bad PR at 100 paces.