diff --git a/KIPs/kip-290.md b/KIPs/kip-290.md
index d221085..e08e12b 100644
--- a/KIPs/kip-290.md
+++ b/KIPs/kip-290.md
@@ -84,6 +84,8 @@ struct NodeInfo {
     uint256 gcId;
     /// @dev BLS public key and proof-of-possession (immutable)
     BlsPublicKeyInfo blsInfo;
+    /// @dev Human-readable node name (mutable)
+    string name;
     /// @dev Validator metadata in JSON format (mutable)
     string metadata;
     /// @dev Current state of the node
@@ -118,9 +120,10 @@ enum State {
 
 The `metadata` field in `NodeInfo` is a JSON-encoded string. All fields are optional. Unrecognized fields SHOULD be ignored by readers.
 
+> **Note**: The node operator name is stored as the top-level `name` field in `NodeInfo` (a required parameter of `createNode`), not inside `metadata`.
+
 | Field         | Type     | Description                        |
 | ------------- | -------- | ---------------------------------- |
-| `name`        | string   | Human-readable node operator name  |
 | `thumbnail`   | string   | URL to operator thumbnail/logo     |
 | `summary`     | string   | Short description                  |
 | `description` | string   | Long description                   |
@@ -132,7 +135,6 @@ Example:
 
 ```json
 {
-    "name": "Kaia Foundation",
     "thumbnail": "https://cdn.prod.website-files.com/66a8ba5239a3fbe8e678da2a/69866193d03bf54b81aa0283_66ce395e60f880698890073dcc91fa28_kaia-logo.svg",
     "summary": "The organization behind the Kaia blockchain.",
     "description": "The Kaia Foundation is the organization behind the Kaia blockchain, an EVM-compatible Layer 1 built for stablecoin settlement and onchain finance across Asia.",
@@ -144,7 +146,7 @@ Example:
 
 #### Interface
 
-AddressBookV2 replaces the existing AddressBook at `0x0000000000000000000000000000000000000400` starting from `FORK_BLOCK`. The interface is divided into user functions (called by node manager), system functions (called by core client via system transaction following [EIP-4788](https://eips.ethereum.org/EIPS/eip-4788) convention), and admin functions (called by contract owner).
+AddressBookV2 replaces the existing AddressBook at `0x0000000000000000000000000000000000000400` starting from `FORK_BLOCK`. The interface is divided into user functions (called by node manager), system functions (called by core client via system transaction following [EIP-4788](https://eips.ethereum.org/EIPS/eip-4788) convention), and admin functions (called by contract owner or designated roles).
 
 ```solidity
 pragma solidity ^0.8.0;
@@ -152,19 +154,45 @@ pragma solidity ^0.8.0;
 import {State, BlsPublicKeyInfo, NodeInfo, Profile} from "./types/Node.sol";
 
 interface IAddressBookV2 {
+    // ── Errors ──
+    error OnlySuspender();
+    error OnlyConfigurator();
+    error InvalidState();
+    error SlotsFull();
+    error InvalidInput();
+    error StakingTooLow();
+    error NodeAlreadyExists();
+    error NodeNotFound();
+    error TimeoutExpired();
+    error AlreadySuspended();
+    error NotSuspended();
+    error PDEnabled();
+    error InsufficientNodeBalance();
+    error GcIdAlreadyAssigned();
+    error GcIdNotAssigned();
+
     // ── Events ──
     event StateChanged(address indexed nodeId, State indexed fromState, State indexed toState);
-    event NodeCreated(address indexed nodeId, uint256 gcId);
+    event NodeCreated(address indexed nodeId);
+    event GcIdAssigned(address indexed nodeId, uint256 gcId);
     event NodeDeleted(address indexed nodeId);
+    event ValidatorSuspended(address indexed nodeId);
+    event ValidatorUnsuspended(address indexed nodeId);
+    event CandidateReadied(address indexed nodeId);
+    event CandidateUnreadied(address indexed nodeId);
+    event ValidatorsInitialized(address[] nodeIds);
     event SystemTransitionProcessed(address[] nodeIds, State[] newStates);
     event EpochTransitionProcessed(uint256 epochVACount);
+    event UintConfigUpdated(uint8 indexed configId, uint256 oldValue, uint256 newValue);
+    event AddressConfigUpdated(uint8 indexed configId, address oldValue, address newValue);
 
     // ── User Functions (called by node manager) ──
 
-    /// @notice Register a new node in Registered state
+    /// @notice Register a new node in Registered state; name must be non-empty
     function createNode(
         address nodeId, address stakingContract, address rewardAddress,
-        address voterAddress, BlsPublicKeyInfo memory blsInfo, string memory metadata
+        address voterAddress, BlsPublicKeyInfo memory blsInfo,
+        string memory name, string memory metadata
     ) external;
 
     /// @notice Remove a Registered node entirely
@@ -207,10 +235,21 @@ interface IAddressBookV2 {
         uint256 epochVACount
     ) external;
 
-    // ── Admin Functions (called by contract owner) ──
+    // ── Admin Functions ──
 
+    /// @notice Emergency suspension (called by suspender)
     function suspendValidator(address nodeId) external;
+    /// @notice Lift suspension (called by suspender)
     function unsuspendValidator(address nodeId) external;
+    /// @notice Update suspender address (called by owner)
+    function updateSuspender(address newSuspender) external;
+    /// @notice Update configurator address (called by owner)
+    function updateConfigurator(address newConfigurator) external;
+    /// @notice Assign auto-incremented gcId to a node (called by configurator)
+    function assignGcId(address nodeId) external;
+    /// @notice Revoke gcId from a node, setting it back to 0 (called by configurator)
+    function revokeGcId(address nodeId) external;
+
     function updatePauseTimeout(uint256 newPauseTimeout) external;
     function updateIdleTimeout(uint256 newIdleTimeout) external;
     function updateMaxNodeCount(uint256 newMaxNodeCount) external;
@@ -221,6 +260,8 @@ interface IAddressBookV2 {
 
     // ── Getters ──
 
+    function getSuspender() external view returns (address);
+    function getConfigurator() external view returns (address);
     function getNodeInfo(address nodeId) external view returns (NodeInfo memory);
     function getNodeInfos(address[] calldata nodeIds) external view returns (NodeInfo[] memory);
     function getAllProfiles() external view returns (Profile[] memory);