pragma solidity ^0.8.13;

contract CooldownCapabilityManifest {
    error ZeroHash();
    error Cooldown();

    mapping(address => uint256) private _records;

    event ManifestUpdated(address indexed agent, uint224 manifestHash, uint32 updatedAt, uint256 blockNumber);

    function set(uint224 manifestHash) external {
        if (manifestHash == 0) revert ZeroHash();
        uint256 record = _records[msg.sender];
        if (record != 0 && block.timestamp < uint256(uint32(record)) + 3600) revert Cooldown();
        uint32 now32 = uint32(block.timestamp);
        _records[msg.sender] = (uint256(manifestHash) << 32) | now32;
        emit ManifestUpdated(msg.sender, manifestHash, now32, block.number);
    }

    function resolve(address agent) external view returns (uint224 manifestHash, uint32 lastUpdate, uint256 blockNumber) {
        uint256 record = _records[agent];
        manifestHash = uint224(record >> 32);
        lastUpdate = uint32(record);
        blockNumber = block.number;
    }
}