{"id":"hexspeak-string-input-contract","text":"`to_hexspeak` takes `num` as a string (not int) matching the LeetCode signature, converting internally via `int(num)` with no input validation.","truth_value":"IN","source":"entries/2026/06/06/hexspeak-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"hexspeak-string-input-contract","truth_value":"IN","reason":"premise"}]}}