> ## Documentation Index
> Fetch the complete documentation index at: https://traceroot.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Understand what TraceRoot traces and why it matters

Tracing records what your AI agent does — every LLM call, tool invocation, and function execution — so you can debug individual runs and understand behavior over time.

Once tracing is active, TraceRoot gives you:

* **Full span hierarchy** — see exactly how your agent executes, call by call
* **Token usage and cost** — per LLM call and aggregated per trace
* **Source code correlation** — every span links back to the file and line that produced it

<Frame>
  <img src="https://mintcdn.com/tracerootai/4zVNm0JX6EXIYr5i/images/traces_v1.png?fit=max&auto=format&n=4zVNm0JX6EXIYr5i&q=85&s=926837c24c3b0628d5a32595ca475120" alt="TraceRoot trace viewer showing span hierarchy and LLM calls" width="3444" height="1852" data-path="images/traces_v1.png" />
</Frame>

## Where to start

<CardGroup cols={2}>
  <Card title="Get Started" icon="rocket" href="/tracing/get-started">
    Instrument your agent and send your first trace in minutes.
  </Card>

  <Card title="Features" icon="sparkles" href="/tracing/overview">
    Attach users, sessions, tags, metadata, and more to your traces.
  </Card>
</CardGroup>