Initial Meridian Protocol implementation

- Complete MeridianToken standard with compliance & reserve checks
- Multi-custodian ReserveAggregator supporting bank/crypto/fund admin
- Comprehensive Compliance engine with KYC/AML/sanctions
- Full interface definitions and deployment scripts
- Test suite for core functionality
- Ready for GBP launch with Anchorage custody integration

contracts/interfaces/ICompliance.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+/**
+ * @title ICompliance
+ * @dev Interface for KYC, sanctions screening, and AML compliance
+ */
+interface ICompliance {
+    struct KYCRecord {
+        bool isWhitelisted;
+        uint256 kycLevel; // 1=basic, 2=enhanced, 3=institutional
+        uint256 whitelistTime;
+        uint256 expiryTime;
+        string jurisdiction;
+    }
+
+    struct VelocityLimits {
+        uint256 dailyLimit;
+        uint256 monthlyLimit;
+        uint256 dailySpent;
+        uint256 monthlySpent;
+        uint256 lastDayReset;
+        uint256 lastMonthReset;
+    }
+
+    /**
+     * @dev Check if address is whitelisted for KYC
+     * @param account Address to check
+     * @return isWhitelisted True if account passed KYC
+     */
+    function isWhitelisted(address account) external view returns (bool);
+
+    /**
+     * @dev Check if address is on sanctions list
+     * @param account Address to check
+     * @return isSanctioned True if account is sanctioned
+     */
+    function isSanctioned(address account) external view returns (bool);
+
+    /**
+     * @dev Check velocity limits for transaction
+     * @param account Address making transaction
+     * @param amount Transaction amount
+     * @return withinLimits True if transaction is within velocity limits
+     */
+    function checkVelocityLimits(address account, uint256 amount) external view returns (bool withinLimits);
+
+    /**
+     * @dev Get KYC record for address
+     * @param account Address to query
+     */
+    function getKYCRecord(address account) external view returns (KYCRecord memory);
+
+    /**
+     * @dev Get velocity limits for address
+     * @param account Address to query
+     */
+    function getVelocityLimits(address account) external view returns (VelocityLimits memory);
+
+    /**
+     * @dev Update velocity tracking after transaction
+     * @param account Address that made transaction
+     * @param amount Transaction amount
+     */
+    function updateVelocityTracking(address account, uint256 amount) external;
+
+    /**
+     * @dev Check if transaction should trigger AML reporting
+     * @param from Sender address
+     * @param to Recipient address  
+     * @param amount Transaction amount
+     * @return shouldReport True if transaction exceeds reporting thresholds
+     * @return reportType Type of report needed (1=CTR, 2=SAR, etc.)
+     */
+    function checkReportingThresholds(
+        address from,
+        address to,
+        uint256 amount
+    ) external view returns (bool shouldReport, uint8 reportType);
+
+    // Events
+    event AccountWhitelisted(address indexed account, uint256 kycLevel, string jurisdiction);
+    event AccountBlacklisted(address indexed account, string reason);
+    event SanctionsListUpdated(uint256 newListHash);
+    event VelocityLimitsUpdated(address indexed account, uint256 dailyLimit, uint256 monthlyLimit);
+    event ReportingThresholdTriggered(address indexed from, address indexed to, uint256 amount, uint8 reportType);
+    event VelocityLimitExceeded(address indexed account, uint256 attempted, uint256 remaining);
+}