chore: add AGENTS.md for opencode agents

# Agents

This role configures [Atuin](https://atuin.sh/) server - a modern replacement for shell history with encrypted sync and cloud support.

## Role Analysis

- **Type**: Application server role

- **OS Support**: Debian 12

- **Deployment Method**: Docker (inferred from structure)

- **Dependencies**: Docker must be installed on the target host

## Key Variables

| Variable | Default | Description |

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

| `atuin_version` | `18.11.0` | Atuin server version |

| `atuin_db_host` | `localhost` | Database host |

| `atuin_db_name` | `atuin` | Database name |

| `atuin_db_user` | `atuin` | Database user |

| `atuin_db_pass` | `atuin` | Database password |

## Tasks

1. **install** - Installs Atuin via Docker

2. **config** - Configures Atuin settings

## Testing

```bash

ansible-lint

molecule test

```