Stealth-release forensics
A four-stage protocol fingerprints anonymous API models using archived launch configs, tokenizer diffs, and behavioral probes, no weight access required. Run against known releases it matched 7 of 10 exactly, and its prospective call on an unlabeled August drop landed on the right version line before the vendor confirmed it. Handy checklist if you're vetting an unlabeled endpoint before you sign a vendor contract.