feat: recreate remaining missing agent smart contracts from docs

contracts/contracts/AgentCommunication.sol

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+import "@openzeppelin/contracts/access/Ownable.sol";
+
+contract AgentCommunication is Ownable {
+    struct Message {
+        address sender;
+        address recipient;
+        string encryptedContent;
+        uint256 timestamp;
+    }
+
+    mapping(address => Message[]) public inbox;
+
+    event MessageSent(address indexed sender, address indexed recipient);
+
+    function sendMessage(address _recipient, string calldata _encryptedContent) external {
+        inbox[_recipient].push(Message(msg.sender, _recipient, _encryptedContent, block.timestamp));
+        emit MessageSent(msg.sender, _recipient);
+    }
+
+    function getMessages() external view returns (Message[] memory) {
+        return inbox[msg.sender];
+    }
+}

contracts/contracts/AgentMemory.sol

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
+
+contract AgentMemory is Ownable, ReentrancyGuard {
+    struct MemoryAnchor {
+        string cid;
+        uint256 timestamp;
+        uint256 version;
+    }
+
+    mapping(address => MemoryAnchor[]) public agentMemories;
+    mapping(address => uint256) public agentMemoryVersions;
+
+    event MemoryAnchored(address indexed agent, string cid, uint256 version, uint256 timestamp);
+
+    function anchorMemory(string calldata _cid) external nonReentrant {
+        require(bytes(_cid).length > 0, "Invalid CID");
+        
+        uint256 nextVersion = agentMemoryVersions[msg.sender] + 1;
+        
+        agentMemories[msg.sender].push(MemoryAnchor({
+            cid: _cid,
+            timestamp: block.timestamp,
+            version: nextVersion
+        }));
+        
+        agentMemoryVersions[msg.sender] = nextVersion;
+        
+        emit MemoryAnchored(msg.sender, _cid, nextVersion, block.timestamp);
+    }
+
+    function getLatestMemory(address _agent) external view returns (MemoryAnchor memory) {
+        require(agentMemories[_agent].length > 0, "No memory anchored");
+        return agentMemories[_agent][agentMemories[_agent].length - 1];
+    }
+}

contracts/contracts/CrossChainReputation.sol

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+import "@openzeppelin/contracts/access/Ownable.sol";
+
+contract CrossChainReputation is Ownable {
+    struct Reputation {
+        uint256 score;
+        uint256 taskCompleted;
+        uint256 disputeLost;
+        uint256 lastUpdated;
+    }
+
+    mapping(address => Reputation) public reputations;
+
+    event ReputationUpdated(address indexed agent, uint256 newScore);
+
+    function updateReputation(address _agent, uint256 _score, uint256 _tasks, uint256 _disputes) external onlyOwner {
+        reputations[_agent] = Reputation(_score, _tasks, _disputes, block.timestamp);
+        emit ReputationUpdated(_agent, _score);
+    }
+
+    function getReputation(address _agent) external view returns (uint256) {
+        return reputations[_agent].score;
+    }
+}

contracts/contracts/KnowledgeGraphMarket.sol

@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
+
+contract KnowledgeGraphMarket is Ownable, ReentrancyGuard {
+    using SafeERC20 for IERC20;
+
+    IERC20 public aitbcToken;
+    uint256 public graphCounter;
+    uint256 public platformFeePercentage = 250; // 2.5%
+
+    struct KnowledgeGraph {
+        uint256 id;
+        address creator;
+        string cid;
+        uint256 price;
+        uint256 totalSales;
+        bool isActive;
+    }
+
+    mapping(uint256 => KnowledgeGraph) public graphs;
+    mapping(uint256 => mapping(address => bool)) public hasPurchased;
+
+    event GraphListed(uint256 indexed id, address indexed creator, string cid, uint256 price);
+    event GraphPurchased(uint256 indexed id, address indexed buyer, uint256 price);
+
+    constructor(address _aitbcToken) {
+        aitbcToken = IERC20(_aitbcToken);
+    }
+
+    function listGraph(string calldata _cid, uint256 _price) external returns (uint256) {
+        uint256 id = graphCounter++;
+        graphs[id] = KnowledgeGraph(id, msg.sender, _cid, _price, 0, true);
+        emit GraphListed(id, msg.sender, _cid, _price);
+        return id;
+    }
+
+    function purchaseGraph(uint256 _id) external nonReentrant {
+        KnowledgeGraph storage graph = graphs[_id];
+        require(graph.isActive, "Graph inactive");
+        require(!hasPurchased[_id][msg.sender], "Already purchased");
+
+        uint256 fee = (graph.price * platformFeePercentage) / 10000;
+        uint256 creatorAmount = graph.price - fee;
+
+        aitbcToken.safeTransferFrom(msg.sender, address(this), graph.price);
+        aitbcToken.safeTransfer(graph.creator, creatorAmount);
+
+        graph.totalSales++;
+        hasPurchased[_id][msg.sender] = true;
+
+        emit GraphPurchased(_id, msg.sender, graph.price);
+    }
+}

contracts/contracts/MemoryVerifier.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "./ZKReceiptVerifier.sol";
+
+contract MemoryVerifier is Ownable {
+    ZKReceiptVerifier public zkVerifier;
+
+    event MemoryVerified(address indexed agent, string cid, bool isValid);
+
+    constructor(address _zkVerifier) {
+        zkVerifier = ZKReceiptVerifier(_zkVerifier);
+    }
+
+    function verifyMemoryIntegrity(address _agent, string calldata _cid, bytes calldata _zkProof) external {
+        // Pseudo-implementation to fulfill interface requirements
+        bool isValid = _zkProof.length > 0;
+        emit MemoryVerified(_agent, _cid, isValid);
+    }
+}