> ## Documentation Index
> Fetch the complete documentation index at: https://praison.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Prompt Expander Agent • Rust AI Agent SDK
> PromptExpanderAgent: Agent for expanding prompts
# PromptExpanderAgent
> Defined in the [**Specialized Agents**](../modules/specialized_agents) module.
Rust AI Agent SDK
Agent for expanding prompts
```mermaid theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
%%{init: {'theme': 'base', 'themeVariables': { 'primaryColor': '#8B0000', 'primaryTextColor': '#fff', 'primaryBorderColor': '#710101', 'lineColor': '#189AB4', 'secondaryColor': '#189AB4', 'tertiaryColor': '#fff' }}}%%
graph LR
input["Input Data"] --> agent["Agent: PromptExpanderAgent"]
agent --> output["Output Result"]
style agent fill:#8B0000,color:#fff
style input fill:#8B0000,color:#fff
style output fill:#8B0000,color:#fff
```
## Fields
| Name | Type | Description |
| -------- | ---------------------- | ----------- |
| `config` | `PromptExpanderConfig` | - |
## Methods
### `new`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn new() -> PromptExpanderAgentBuilder
```
Create a new builder
### `name`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn name(&self) -> &str
```
Get agent name
### `model`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn model(&self) -> &str
```
Get model
### `detect_strategy`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn detect_strategy(&self, prompt: &str) -> ExpandStrategy
```
Detect the best expansion strategy for a prompt
**Parameters:**
| Name | Type |
| -------- | ------ |
| `prompt` | `&str` |
### `expand_sync`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn expand_sync(
&self,
prompt: &str,
strategy: ExpandStrategy,
context: Option<&str>,
) -> ExpandResult
```
Expand a prompt (sync placeholder - actual implementation would use LLM)
**Parameters:**
| Name | Type |
| ---------- | -------------------- |
| `prompt` | `&str` |
| `strategy` | `ExpandStrategy` |
| `context` | `Option<&str>` |
## Source
`praisonai/src/specialized_agents.rs` at line 280
***
## Related Documentation