Antigravity and Codex security: stopping secret leaks with hooks and sandboxes
Originally published at ReclaimLLM . How Google Antigravity and OpenAI Codex agents read, print, and send secrets; what hooks and sandboxes cover; and where vendor docs leave failure modes undocumented. Antigravity and Codex security: stopping secret leaks with hooks and sandboxes Executive summary Side-by-side of Antigravity and Codex: where secrets leak, what each vendor’s hooks/sandbox cover,…
Antigravity and OpenAI Codex provide hooks that can deny tool calls before execution, along with sandboxes or approval boundaries to restrict shell command capabilities. However, neither stack offers default secret protection as post-tool hooks cannot undo side effects, and hook failures often do not block underlying actions. To secure data for a team rolling out either agent in 2026, it is advised to combine pre-tool hooks, network limits, environment file controls, and session capture for post-fact review.
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