SafeDiamondCutStorage

struct SafeDiamondCutStorage {
    /// @dev The pinned Safe multisig that is the sole authority for cuts / freezes / rotation. The
    ///      facet trusts `msg.sender == _safe`; the Safe verifies its M-of-N owner signatures off-chain
    ///      and on-chain in `execTransaction` and MUST dispatch with `operation = Call`.
    address _safe;
    /// @dev Monotonic counter of cuts applied; doubles as the latest registry version. The value
    ///      assigned to a cut (post-increment) IS that cut's `version`.
    uint256 _cutCount;
    /// @dev Append-only registry: version (1-indexed) => immutable {IUpgradeRegistry.CutRecord}.
    ///      Written once per successful cut and never mutated thereafter.
    mapping(uint256 version => IUpgradeRegistry.CutRecord record) _cutRegistry;
    /// @dev Append-only set of frozen function selectors. A selector in this set can never be the
    ///      target of a `Replace` or `Remove` in any future cut (the guard checks this set BEFORE
    ///      delegating to diamond-lib). There is deliberately no unfreeze.
    EnumerableSet.Bytes4Set _frozenSelectors;
}