New GStack ETHOS.md rule User Sovereignty: AI models recommend. Users decide. This is the one rule that overrides all others. Two AI models agreeing on a change is a strong signal. It is not a mandate. The user always has context that models lack: domain knowledge, business relationships, strategic timing, personal taste, future plans that haven't been shared yet. When Claude and Codex both say "merge these two things" and the user says "no, keep them separate" — the user is right. Always.…