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rel="noopener noreferrer" class="menu__link menuExternalLink_NmtK">API reference<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></nav></div></div></aside><main class="docMainContainer_gTbr"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/langchaingo/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Welcome to LangChainGo</span><meta itemprop="position" content="1"></li></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Welcome to LangChainGo</h1><p><img loading="lazy" src="https://pkg.go.dev/static/shared/icon/favicon.ico" alt="gopher" class="img_ev3q"></p><p>LangchainGo is the <a href="https://go.dev/" target="_blank" rel="noopener noreferrer">Go Programming Language</a> port/fork of <a href="https://www.langchain.com/" target="_blank" rel="noopener noreferrer">LangChain</a>.</p><p>LangChain is a framework for developing applications powered by language models. We believe that the most powerful and differentiated applications will not only call out to a language model via an API, but will also:</p><ul><li><em>Be data-aware</em>: connect a language model to other sources of data</li><li><em>Be agentic</em>: allow a language model to interact with its environment</li></ul><p>The LangChain framework is designed with the above principles in mind.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="getting-started">Getting Started<a href="#getting-started" class="hash-link" aria-label="Direct link to Getting Started" title="Direct link to Getting Started"></a></h2><p><em><strong>Note</strong>: These docs are for <a href="https://github.com/tmc/langchaingo" target="_blank" rel="noopener noreferrer">LangChainGo</a>. For documentation on <a href="https://github.com/langchain-ai/langchain" target="_blank" rel="noopener noreferrer">the Python version</a>, <a href="https://python.langchain.com/docs" target="_blank" rel="noopener noreferrer">head here</a>.</em></p><p>Checkout the guide below for a walkthrough of how to get started using LangChain to create a Language Model application.</p><ul><li><a href="/langchaingo/docs/getting-started/guide-ollama">Quickstart, using Ollama</a></li><li><a href="/langchaingo/docs/getting-started/guide-openai">Quickstart, using OpenAI</a></li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="components">Components<a href="#components" class="hash-link" aria-label="Direct link to Components" title="Direct link to Components"></a></h2><p>There are several main modules that LangChain provides support for. For each module we provide some examples to get started and get familiar with some of the concepts. </p><p>These modules are, in increasing order of complexity:</p><ul><li><p><a href="/langchaingo/docs/modules/model_io/models/">Models</a>: This includes integrations with a variety of LLMs, Chat Models and Embeddings models.</p></li><li><p><a href="/langchaingo/docs/modules/model_io/prompts/">Prompts</a>: This includes prompt Templates and functionality to work with prompts like Output Parsers and Example Selectors</p></li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="api-reference">API Reference<a href="#api-reference" class="hash-link" aria-label="Direct link to API Reference" title="Direct link to API Reference"></a></h2><p><a href="https://pkg.go.dev/github.com/tmc/langchaingo" target="_blank" rel="noopener noreferrer">Here</a> you can find the API reference for all of the modules in LangChain, as well as full documentation for all exported classes and functions.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="additional-resources">Additional Resources<a href="#additional-resources" class="hash-link" aria-label="Direct link to Additional Resources" title="Direct link to Additional Resources"></a></h2><p>Additional collection of resources we think may be useful as you develop your application!</p><ul><li><p><a href="https://github.com/hwchase17/langchain-hub" target="_blank" rel="noopener noreferrer">LangChainHub</a>: The LangChainHub is a place to share and explore other prompts, chains, and agents.</p></li><li><p><a href="https://discord.gg/6adMQxSpJS" target="_blank" rel="noopener noreferrer">Discord</a>: Join us on our Discord to discuss all things LangChain!</p></li><li><p><a href="https://forms.gle/57d8AmXBYp8PP8tZA" target="_blank" rel="noopener noreferrer">Production Support</a>: As you move your LangChains into production, we'd love to offer more comprehensive support. Please fill out this form and we'll set up a dedicated support Slack channel.</p></li></ul></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/tmc/langchaingo/edit/main/docs/docs/index.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages navigation"><a class="pagination-nav__link pagination-nav__link--next" href="/langchaingo/docs/getting-started/guide-ollama"><div class="pagination-nav__sublabel">Next</div><div 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