Rescue cursor pagination contract
Extreme APIs arena: cursor design, stable ordering, and backward compatibility
Log in and clear the lower tiers to unlock this mission.
Missing prerequisites: apis-easy-pagination-contract
A mobile client drops items when new records arrive during pagination. You are working inside an API platform team, and the arena only clears when the result is safe, deterministic, and explainable.
Learn to apply cursor design, stable ordering, and backward compatibility in an API platform team while explaining the invariant, safety constraints, and hidden edge cases.
- Demonstrates cursor design, stable ordering, and backward compatibility
- Handles the visible sample and hidden edge cases
- Keeps output deterministic and explainable
- Avoids unsafe dynamic execution
Clear the route first
You can read the mission brief, but the editor, hints, tests, and submit flow stay locked until progression or plan access catches up.
Test Results
Run the visible checks when your first pass is ready.
Clear Protocol
Rewards
Mission Route
Hints
Hints are metered and logged for No Hint Hero runs.
Genie Mentor Core
Hint protocol / contextual guardrails active