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## Summary - adds macOS Seatbelt deny rules for unreadable glob patterns - expands unreadable glob matches on Linux and masks them in bwrap, including canonical symlink targets - keeps Linux glob expansion robust when `rg` is unavailable in minimal or Bazel test environments - adds sandbox integration coverage that runs `shell` and `exec_command` with a `**/*.env = none` policy and verifies the secret contents do not reach the model ## Linux glob expansion ```text Prefer: rg --files --hidden --no-ignore --glob <pattern> -- <search-root> Fallback: internal globset walker when rg is not installed Failure: any other rg failure aborts sandbox construction ``` ``` [permissions.workspace.filesystem] glob_scan_max_depth = 2 [permissions.workspace.filesystem.":project_roots"] "**/*.env" = "none" ``` This keeps the common path fast without making sandbox construction depend on an ambient `rg` binary. If `rg` is present but fails for another reason, the sandbox setup fails closed instead of silently omitting deny-read masks. ## Platform support - macOS: subprocess sandbox enforcement is handled by Seatbelt regex deny rules - Linux: subprocess sandbox enforcement is handled by expanding existing glob matches and masking them in bwrap - Windows: policy/config/direct-tool glob support is already on `main` from #15979; Windows subprocess sandbox paths continue to fail closed when unreadable split filesystem carveouts require runtime enforcement, rather than silently running unsandboxed ## Stack 1. #15979 - merged: cross-platform glob deny-read policy/config/direct-tool support for macOS, Linux, and Windows 2. This PR - macOS/Linux subprocess sandbox enforcement plus Windows fail-closed clarification 3. #17740 - managed deny-read requirements ## Verification - Added integration coverage for `shell` and `exec_command` glob deny-read enforcement - `cargo check -p codex-sandboxing -p codex-linux-sandbox --tests` - `cargo check -p codex-core --test all` - `cargo clippy -p codex-linux-sandbox -p codex-sandboxing --tests` - `just bazel-lock-check` --------- Co-authored-by: Codex <noreply@openai.com>