swift-security-expert

The fragment is security guidance with mostly defensive intent and no clear malware, backdoor, credential harvesting, or sabotage behavior. It contains important implementation weaknesses: missing OAuth state validation, non-atomic delete/add token replacement, unencoded token request bodies, unimplemented App Attest, unsafe forced casts/unwraps, and a potentially unsafe runtime secret path. Example hardcoded secrets should remain outside shipped artifacts. Review and correct these issues before using the code in production.