gstack 1.57.10.0

One switch governs it, and it falls back to Claude when Codex is missing or unauthed. Codex cross-model review used to be inconsistent. /review and /ship ran it automatically, but plan reviews hid it behind a "Want an outside voice?" question you had to say yes to every time, /document-release never ran it at all, and every entry point only checked whether the codex binary existed, not whether it was logged in. Now codex_reviews is one master switch (default enabled) that governs Codex review across /review, /ship, /plan-ceo-review, /plan-eng-review, /plan-design-review, /plan-devex-review, /document-release, and /autoplan. The plan-review outside voice runs automatically. /document-release gets a new Codex pass that checks your docs against what actually shipped. Every call site now detects install AND auth separately, and degrades to a Claude subagent with a clear one-line reason instead of silently skipping. Turn the whole thing off with one command: gstack-config set codex_reviews disabled. Added: codex_reviews as the master switch. Added: /document-release Codex doc audit. Added: codexPreflight() shared helper. Changed: Plan-review outside voice is default-on. Adversarial review detects auth, not just install. /autoplan honors codex_reviews=disabled. Fixed: Three gstack-config tests asserted behavior that did not match real output.