> ## 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.
# Thinking Tracker • Rust AI Agent SDK
> ThinkingTracker: Tracks thinking usage across multiple sessions. Provides aggregate statistics and reporting.
# ThinkingTracker
> Defined in the [**thinking**](../modules/thinking) module.
Rust AI Agent SDK
Tracks thinking usage across multiple sessions. Provides aggregate statistics and reporting.
## Fields
| Name | Type | Description |
| -------------------- | -------------------------- | ------------------------------------- |
| `sessions` | `Vec<ThinkingUsage>` | All tracked sessions |
| `total_tokens_used` | `usize` | Total tokens used across all sessions |
| `total_time_seconds` | `f64` | Total time across all sessions |
## Methods
### `new`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn new() -> Self
```
Create a new tracker.
### `start_session`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn start_session(
&mut self,
budget_tokens: usize,
budget_time: Option,
complexity: f64,
) -> usize
```
Start a new thinking session. # Arguments \* `budget_tokens` - Token budget for this session \* `budget_time` - Optional time budget \* `complexity` - Task complexity (0.0 to 1.0) # Returns Index of the new session
**Parameters:**
| Name | Type |
| --------------- | ------------------- |
| `budget_tokens` | `usize` |
| `budget_time` | `Option<f64>` |
| `complexity` | `f64` |
### `end_session`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn end_session(&mut self, session_idx: usize, tokens_used: usize, time_seconds: f64) -> ()
```
End a thinking session. # Arguments \* `session_idx` - Index of the session to end \* `tokens_used` - Actual tokens used \* `time_seconds` - Actual time taken
**Parameters:**
| Name | Type |
| -------------- | ------- |
| `session_idx` | `usize` |
| `tokens_used` | `usize` |
| `time_seconds` | `f64` |
### `session_count`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn session_count(&self) -> usize
```
Get the number of sessions.
### `average_tokens_per_session`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn average_tokens_per_session(&self) -> f64
```
Get average tokens per session.
### `average_time_per_session`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn average_time_per_session(&self) -> f64
```
Get average time per session.
### `average_utilization`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn average_utilization(&self) -> f64
```
Get average budget utilization.
### `over_budget_count`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn over_budget_count(&self) -> usize
```
Get number of sessions that went over budget.
### `get_summary`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn get_summary(&self) -> HashMap
```
Get summary statistics.
### `clear`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn clear(&mut self) -> ()
```
Clear all tracking data.
## Source
`praisonai/src/thinking/mod.rs` at line 389
***
## Related Documentation