Codex Advisor automatically adds a fresh, read-only second opinion when Codex identifies a material technical decision. Standard remains Terra/high for ordinary bounded architecture, interface, data-model, and generic-advisor decisions. Specialist remains Sol/high only when targeted evidence still leaves a cross-system design, compatibility or concurrency boundary, competing diagnosis, security or trust boundary, recovery, irreversible migration, or data-loss decision unresolved. Project importance, security adjacency, or an ordinary architecture question alone stays Standard. A separate advisor-astra role offers explicit-only Astra/high consultation for the most complex uses; it is never selected automatically, uses more Codex allowance, and remains subject to account and runtime availability. Every consultation runs in a separate read-only, tool-free process. It cannot change your files, run commands, browse the web, or make decisions for you. You remain in control: Advisor does not implement, deploy, or perform final review.