CTF Flag Validator

The tool provides a structured model for CTF challenges and a deterministic evaluation method. It accepts a set of challenges with id, name, points, and a flag_pattern that defines valid submissions. When user_attempts are provided, each submission is checked against its corresponding flag_pattern using regex matching. Correct matches award the assigned points, while repeated correct submissions do not accrue additional points. The result is a per-challenge verdict and a total score for the run. This approach ensures repeatable scoring across sessions and events. Benefits include rapid feedback for learners, clear auditing for instructors, and scalable scoring for large teams. Use cases cover classroom practice, online training, and tournament preparation, where consistent evaluation and challenge catalog management are essential. Unique differentiators include strict pattern-based validation, explicit non-credit for duplicates, and a clean separation between challenge metadata and evaluation logic, enabling easy imports/exports and reproducible runs.