> ## 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.
# Agent Builder • Rust AI Agent SDK
> AgentBuilder: Builder for creating agents
# AgentBuilder
> Defined in the [**builder**](../modules/builder) module.
Rust AI Agent SDK
Builder for creating agents
```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: AgentBuilder"]
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 |
| --------------- | -------------------------------- | ----------- |
| `name` | `Option<String>` | - |
| `instructions` | `Option<String>` | - |
| `llm_config` | `LlmConfig` | - |
| `tools` | `Vec<Box<dyn Tool>>` | - |
| `memory_config` | `MemoryConfig` | - |
| `config` | `AgentConfig` | - |
## Methods
### `new`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn new() -> Self
```
Create a new agent builder
### `name`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn name(mut self, name: impl Into) -> Self
```
Set the agent name
**Parameters:**
| Name | Type |
| ------ | ------------------------- |
| `name` | `impl Into<String>` |
### `instructions`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn instructions(mut self, instructions: impl Into) -> Self
```
Set the system instructions
**Parameters:**
| Name | Type |
| -------------- | ------------------------- |
| `instructions` | `impl Into<String>` |
### `model`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn model(mut self, model: impl Into) -> Self
```
Set the LLM model
**Parameters:**
| Name | Type |
| ------- | ------------------------- |
| `model` | `impl Into<String>` |
### `llm`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn llm(self, model: impl Into) -> Self
```
Alias for model() - matches Python SDK
**Parameters:**
| Name | Type |
| ------- | ------------------------- |
| `model` | `impl Into<String>` |
### `api_key`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn api_key(mut self, key: impl Into) -> Self
```
Set the API key
**Parameters:**
| Name | Type |
| ----- | ------------------------- |
| `key` | `impl Into<String>` |
### `base_url`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn base_url(mut self, url: impl Into) -> Self
```
Set the base URL for the LLM API
**Parameters:**
| Name | Type |
| ----- | ------------------------- |
| `url` | `impl Into<String>` |
### `temperature`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn temperature(mut self, temp: f32) -> Self
```
Set the temperature
**Parameters:**
| Name | Type |
| ------ | ----- |
| `temp` | `f32` |
### `max_tokens`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn max_tokens(mut self, max: u32) -> Self
```
Set max tokens
**Parameters:**
| Name | Type |
| ----- | ----- |
| `max` | `u32` |
### `tool`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn tool(mut self, tool: impl Tool + 'static) -> Self
```
Add a tool
**Parameters:**
| Name | Type |
| ------ | --------------------- |
| `tool` | `impl Tool + 'static` |
### `tools`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn tools(mut self, tools: impl IntoIterator- ) -> Self
```
Add multiple tools
**Parameters:**
| Name | Type |
| ------- | --------------------------- |
| `tools` | `impl IntoIterator<Item` |
### `memory`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn memory(mut self, enabled: bool) -> Self
```
Enable memory
**Parameters:**
| Name | Type |
| --------- | ------ |
| `enabled` | `bool` |
### `memory_config`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn memory_config(mut self, config: MemoryConfig) -> Self
```
Set memory configuration
**Parameters:**
| Name | Type |
| -------- | -------------- |
| `config` | `MemoryConfig` |
### `max_iterations`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn max_iterations(mut self, max: usize) -> Self
```
Set max iterations for tool calling
**Parameters:**
| Name | Type |
| ----- | ------- |
| `max` | `usize` |
### `verbose`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn verbose(mut self, enabled: bool) -> Self
```
Enable verbose output
**Parameters:**
| Name | Type |
| --------- | ------ |
| `enabled` | `bool` |
### `stream`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn stream(mut self, enabled: bool) -> Self
```
Enable/disable streaming
**Parameters:**
| Name | Type |
| --------- | ------ |
| `enabled` | `bool` |
### `build`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn build(self) -> Result
```
Build the agent
## Usage
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
let agent = Agent::new()
.name("assistant")
.instructions("You are helpful")
.model("gpt-4o-mini")
.build()?;
```
## Source
`praisonai/src/agent/builder.rs` at line 47
***
## Related Documentation