RTBLint 0.14.7 Matches 75 of 77 In-Scope OpenRTB Test Cases and 84 of 140 Prebid Expectations

A new preprint evaluates RTBLint 0.14.7, a tool that checks OpenRTB bid messages against versioned contracts. The author argues that a bid response can pass schema checks yet still be invalid, such as when its id or impid does not match the originating request. The checker separates the original payload bytes, declared context such as specification snapshot and encoding, and available evidence like the originating request. Profiles can add requirements or authorize documented exceptions, as shown with a Google fixed-price request. The frozen release agreed with 75 of 77 original in-scope cases, with the two disagreements being malformed Native JSON reported as warnings, while a seeded challenge set exposed failures traced to two omitted protobuf root flags. The paper is an unarchived author-review preprint available on OpenAdTech, and its directed tests are not presented as estimates of production accuracy.