chore: add AGENTS.md for opencode agents

# Agents

This role installs and configures Zabbix Agent 2 for host monitoring.

## Role Analysis

- **Type**: Monitoring agent role

- **OS Support**: Debian 12, SLES 15, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS

- **Deployment Method**: Direct (package installation)

- **Scope**: Zabbix agent installation and configuration

## Key Variables

| Variable | Default | Description |

|----------|---------|-------------|

| `zabbix_agent_hostinterface` | `inventory_hostname` | Agent interface |

| `zabbix_agent_hostname` | `inventory_hostname` | Host name in Zabbix |

| `zabbix_agent_listen_port` | `10050` | Listen port |

| `zabbix_agent_psk_enable` | `true` | Enable PSK encryption |

| `zabbix_agent_psk_id` | (required if PSK enabled) | PSK identity |

| `zabbix_agent_psk` | (required if PSK enabled) | PSK secret |

| `zabbix_proxy_address` | `shared.proxy.monitor.itcreation.tools` | Zabbix proxy |

| `zabbix_proxy_port` | `10051` | Proxy port |

| `zabbix_user_sudo` | `true` | Enable sudo for agent |

## Tags

| Tag | Purpose |

|-----|---------|

| `zabbix_agent_config` | Manage agent configuration |

| `zabbix_agent_install` | Manage agent installation |

| `zabbix_agent_prereq` | Manage prerequisites |

## Testing

```bash

ansible-lint

molecule test

```