Stabilize lookaround token scanner
Medium Regex arena: lookarounds, boundaries, and context-sensitive matches
Log in and clear the lower tiers to unlock this mission.
Missing prerequisites: regex-easy-lookaround-token
A security scanner must find tokens only when they appear in assignment contexts. You are working inside a text-processing challenge room, and the arena only clears when the result is safe, deterministic, and explainable.
Learn to apply lookarounds, boundaries, and context-sensitive matches in a text-processing challenge room while explaining the invariant, safety constraints, and hidden edge cases.
- Demonstrates lookarounds, boundaries, and context-sensitive matches
- 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