> ## Documentation Index
> Fetch the complete documentation index at: https://laminarai-docs-lam-1786-dataset-cli-lmnr-cli.mintlify.site/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), OpenTelemetry-native observability and debugging platform built for AI agents. Trace, debug, and monitor every LLM call, tool call, and sub-agent your agent runs, whether it finishes in one turn or works through hundreds of steps across parallel sub-agents. Use managed Laminar Cloud or [self-host](/self-hosting/overview) the whole platform.

Agents produce enormous amounts of data, and a tree of span names tells you little about what the agent actually did. Laminar is built to turn that data into answers:

* **During development**, the [debugger](/debugger/introduction) records a run and replays it with everything before your change served from cache, so each iteration takes seconds instead of a full live run. Your coding agent can drive the whole loop.

* **In production**, [Signals](/signals/introduction) let you describe outcomes and failures in plain language and extract structured events across all your traces, so you're notified when your agent breaks and know why in seconds.

<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, Claude Agent SDK, LangChain, Browser Use**, and more.
  </Card>

  <Card title="Viewing traces" icon="message-square-text" href="/platform/viewing-traces">
    Read each trace as a transcript: agent inputs, LLM turns, tool calls, and sub-agents collapsed into cards. Not a span tree.
  </Card>

  <Card title="Debugger" icon="bug" href="/debugger/introduction">
    Record a run, replay it from cache up to the point you're testing, and prove the fix with an eval. Built for a coding agent to run.
  </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/introduction">
    Run evals against datasets locally or in CI. Catch regressions before they ship.
  </Card>

  <Card title="Datasets & Labeling" icon="database" href="/datasets/introduction">
    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 from the UI, CLI, or MCP, and custom dashboards.
  </Card>
</CardGroup>