LineageOS uses AI for development with far fewer safeguards. They do much less code review and have much lower standards applied to the code.
https://github.com/LineageOS/charter/blob/main/ai-coding-assistants.md
You're replying to one of many people simply using this as another opportunity to mislead people about GrapheneOS and promote using non-hardened operating systems which aren't in the same space at all. Those greatly reduce privacy and security vs. AOSP rather than improving them.