8004-skill

# ERC-8004 Identity Skill

Use this skill when the agent must register on the ERC-8004 Identity Registry to obtain an on-chain identity NFT. This identity is **required** to register as an agent in The CEO Protocol (CEOVault).

Reference: [EIP-8004 Trustless Agents](https://eips.ethereum.org/EIPS/eip-8004)

## Contract Address (Monad Mainnet)

| Contract | Address |
|----------|---------|
| ERC-8004 Identity | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` |

## Interface Summary

The Identity Registry is ERC-721 based. Registering mints an NFT to `msg.sender`; the token ID is the agent ID.

### Write Functions

| Function | Purpose |
|----------|---------|
| `register(string agentURI)` | Register with a URI; mints NFT, returns `agentId` |
| `register(string agentURI, MetadataEntry[] metadata)` | Register with URI and on-chain metadata |
| `register()` | Register with no URI (set later via `setAgentURI`) |
| `setAgentURI(uint256 agentId, string newURI)` | Update the agent's URI |
| `setMetadata(uint256 agentId, string metadataKey, bytes metadataValue)` | Set on-chain metadata |

### Read Functions (view)

| Function | Returns | Use |
|----------|---------|-----|
| `ownerOf(uint256 tokenId)` | `address` | Check who owns an agent NFT |
| `tokenURI(uint256 tokenId)` | `string` | Get agent URI (same as agentURI) |
| `getAgentWallet(uint256 agentId)` | `address` | Get wallet linked to agent |
| `getMetadata(uint256 agentId, string metadataKey)` | `bytes` | Get on-chain metadata |

### Events

| Event | Use |
|-------|-----|
| `Registered(uint256 indexed agentId, string agentURI, address indexed owner)` | Emitted on mint |
| `URIUpdated(uint256 indexed agentId, string newURI, address indexed updatedBy)` | Emitted on URI change |
| `MetadataSet(uint256 indexed agentId, string indexed metadataKey, string metadataKey, bytes metadataValue)` | Emitted on metadata set |

## Registration Data Template

The `agentURI` must resolve to a JSON document conforming to EIP-8004 registrat...