---
title: Communication Style
description: Define how an agent talks — tone, formality, and output preferences.
---

**Communication Style** defines how an agent communicates with users. It controls tone, verbosity, technical level, and output format preferences.

## Structure

```go
type Style struct {
    Tone            string  // e.g., "professional", "friendly", "casual"
    Formality       float64 // 0.0 = casual, 1.0 = formal
    Verbosity       float64 // 0.0 = terse, 1.0 = verbose
    TechnicalLevel  float64 // 0.0 = layperson, 1.0 = expert
    EmojiUsage      bool    // whether to use emojis
    PreferredFormat string  // e.g., "markdown", "plain", "structured"
    AdaptToUser     bool    // adjust style based on user's language
}
```

## Fields

| Field | Type | Range | Description |
|-------|------|-------|-------------|
| `Tone` | `string` | — | Descriptive tone label |
| `Formality` | `float64` | 0.0–1.0 | Casual to formal spectrum |
| `Verbosity` | `float64` | 0.0–1.0 | Terse to verbose spectrum |
| `TechnicalLevel` | `float64` | 0.0–1.0 | Layperson to expert spectrum |
| `EmojiUsage` | `bool` | — | Include emojis in responses |
| `PreferredFormat` | `string` | — | Output format preference |
| `AdaptToUser` | `bool` | — | Dynamically adjust to user's style |

## Example personas

### Technical lead

```go
communication.Style{
    Tone:           "professional",
    Formality:      0.7,
    Verbosity:      0.4,
    TechnicalLevel: 0.9,
    PreferredFormat: "markdown",
    AdaptToUser:    true,
}
```

### Customer support

```go
communication.Style{
    Tone:           "friendly",
    Formality:      0.3,
    Verbosity:      0.6,
    TechnicalLevel: 0.2,
    EmojiUsage:     true,
    PreferredFormat: "plain",
    AdaptToUser:    true,
}
```

## Embedding in a persona

Communication style is a value object embedded directly in the persona:

```go
persona := &persona.Persona{
    CommunicationStyle: communication.Style{
        Tone:      "professional",
        Formality: 0.7,
    },
}
```