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

# Laminar

Laminar is an [**open-source**](https://github.com/lmnr-ai/lmnr) observability platform purpose-built for AI agents. You can trace every call to an LLM, tool execution and custom functions.

Laminar goes beyond tracing and is deeply focused on helping you properly use captured data and extract insights from it:

* **During development**, Laminar allows you to rollout and replay agents from different parts of the captured trace significantly speeding up the development process.

* **In production**, with Laminar you can describe patterns and errors in natural language and track it across all your traces, to measure real behavior and user interactions with your agents.

<CardGroup cols={2}>
  <Card title="Tracing" icon="list-tree" href="/tracing/introduction">
    Trace LLM calls, tool use, and custom functions. First-class support for **AI SDK, LangChain, Browser Use, Stagehand**, and more.
  </Card>

  <Card title="Signals" icon="radio" href="/signals/introduction">
    Describe outcomes and failures in plain language. Laminar reads every trace and produces structured events you can query, cluster, and alert on.
  </Card>

  <Card title="Evaluations" icon="chart-line" href="/evaluations">
    Run evals against datasets locally or in CI. Catch regressions before they ship.
  </Card>

  <Card title="Datasets & Labeling" icon="database" href="/datasets">
    Build evaluation datasets from production traces.
  </Card>

  <Card title="Playground" icon="play" href="/playground">
    Replay any traced span. Swap prompts or models and compare results side by side.
  </Card>

  <Card title="Platform" icon="layers" href="/platform">
    Realtime traces, full-text search, raw SQL access to all your data, and dashboards for exploring traces however you need to.
  </Card>
</CardGroup>