chore: add AGENTS.md for opencode agents

# Agents

This role contains simple ad-hoc tasks for system maintenance operations.

## Role Analysis

- **Type**: Utility/operations role

- **OS Support**: Alpine 3.22, Debian 13

- **Deployment Method**: Direct execution

## Available Tags

| Tag | Function |

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

| `chrony` | Force update time via Chrony |

| `reboot` | Reboot the system |

| `update` | Install system updates |

## Tasks

- **update** - System package updates

- **reboot** - System reboot

- **chrony** - Force time sync

## Testing

```bash

ansible-lint

molecule test

```