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

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  <div class="mdx-content prose prose-gray dark:prose-invert mx-4 pt-10">
    <h1 class="flex whitespace-pre-wrap group font-semibold text-2xl sm:text-3xl mt-8">The platform for agent engineering</h1>

    One platform to improve every step of the agent development lifecycle, so you can ship reliable agents faster.
    <h2 class="flex whitespace-pre-wrap group font-semibold">Agent development lifecycle</h2>

    <CardGroup cols={2}>
      <Card title="Build" icon="hammer" href="/build-overview" cta="Get started">
        Build agents with code using LangChain, LangGraph, and Deep Agents.
      </Card>

      <Card title="Test" icon="flask" href="/langsmith/evaluation" cta="Get started">
        Evaluate agents with datasets, evaluations, and prompt engineering.
      </Card>

      <Card title="Deploy" icon="rocket" href="/langsmith/deployment" cta="Get started">
        Deploy and serve agents at scale.
      </Card>

      <Card title="Monitor" icon="chart-line" href="/langsmith/observability" cta="Get started">
        Trace, debug, and observe agents in production.
      </Card>
    </CardGroup>

    <h2 class="flex whitespace-pre-wrap group font-semibold">Platform</h2>

    <CardGroup cols={3}>
      <Card title="Platform setup" icon="server" href="/langsmith/platform-setup" cta="Get started">
        Set up Cloud, BYOC, or Self-hosted LangSmith, and govern users and compliance.
      </Card>

      <Card title="LLM Gateway" icon="route" href="/langsmith/llm-gateway" cta="Get started">
        Route, control, and observe LLM traffic across providers.
      </Card>

      <Card title="No-code agents" icon="wand" href="/langsmith/fleet" cta="Get started">
        Build and run agents without code using LangSmith Fleet.
      </Card>

      <Card title="Engine" icon="https://mintcdn.com/langchain-5e9cc07a/auWE6_dMRp183OCf/images/brand/engine-icon-no-bg-dark.svg?fit=max&auto=format&n=auWE6_dMRp183OCf&q=85&s=dd41aef3ce789c1a04ea3c37b5903eac" href="/langsmith/engine-overview" cta="Get started" width="63" height="63" data-path="images/brand/engine-icon-no-bg-dark.svg">
        Find and fix recurring agent issues automatically with LangSmith Engine.
      </Card>

      <Card title="Deep Agents Code" icon="code" href="/oss/deepagents/code/overview" cta="Get started">
        Code with an AI agent in your terminal using the open source `dcode` CLI.
      </Card>
    </CardGroup>

    <h2 class="flex whitespace-pre-wrap group font-semibold">Resources</h2>

    <CardGroup cols={3}>
      <Card title="LangChain Academy" icon="school" href="https://academy.langchain.com/" cta="Enroll">
        Take free courses on building and improving agents with LangSmith and our open-source frameworks.
      </Card>

      <Card title="Community forum" icon="messages" href="https://forum.langchain.com/" cta="Join">
        Ask questions, share solutions, and discuss best practices.
      </Card>

      <Card title="Support portal" icon="message-circle-question" href="https://support.langchain.com/" cta="Visit">
        Submit tickets and track support requests.
      </Card>

      <Card title="Sign up for LangSmith" icon="tools" href="https://smith.langchain.com/" cta="Sign up">
        Start with LangSmith for free.
      </Card>

      <Card title="LangSmith status" icon="activity-heartbeat" href="https://status.smith.langchain.com/" cta="View">
        Real-time status of LangSmith services and APIs.
      </Card>

      <Card title="Trust Center" icon="shield-lock" href="https://trust.langchain.com/" cta="View">
        HIPAA, SOC 2 Type 2, and GDPR compliance details.
      </Card>
    </CardGroup>
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