--- title: Claude Opus 4 + RAG: Build an AI App with Embeddings &... description: Michael, a Microsoft MVP, demonstrates AI Story Builders — an open-source app for writing novels with AI assistance. The app structures stories around... canonical: https://daily.dev/posts/claude-opus-4-rag-build-an-ai-app-with-embeddings-knowledge-graphs-mvp-unplugged-hfudqwg1l twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Claude Opus 4 + RAG: Build an AI App with Embeddings & Knowledge Graphs | MVP Unplugged | daily.dev og:description: Michael, a Microsoft MVP, demonstrates AI Story Builders — an open-source app for writing novels with AI assistance. The app structures stories around... og:url: https://daily.dev/posts/claude-opus-4-rag-build-an-ai-app-with-embeddings-knowledge-graphs-mvp-unplugged-hfudqwg1l og:image: https://api.daily.dev/og/posts/HFUdqWg1l.png og:image:alt: Claude Opus 4 + RAG: Build an AI App with Embeddings & Knowledge Graphs | MVP Unplugged og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Claude Opus 4 + RAG: Build an AI App with Embeddings & Knowledge Graphs | MVP Unplugged **[Microsoft Developer](https://daily.dev/sources/microsoftdeveloper)** · 23 min read · 0 upvotes · 0 comments ## Summary Michael, a Microsoft MVP, demonstrates AI Story Builders — an open-source app for writing novels with AI assistance. The app structures stories around timeline, location, and character data stored in text files, using embeddings and cosine similarity (RAG) to surface relevant context for Claude Opus 4 to write one paragraph at a time. A new feature adds knowledge graphs exposed as AI tools, enabling richer querying of story elements beyond what plain RAG can surface, and allowing the AI to update story files based on identified inconsistencies. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Opus 4.5 is going to change everything](https://daily.dev/posts/opus-4-5-is-going-to-change-everything-x6ymvhmnl) · Hacker News · 0 upvotes · 0 comments --- Tags: [#claude](https://daily.dev/tags/claude), [#rag](https://daily.dev/tags/rag), [#embeddings](https://daily.dev/tags/embeddings) [View this post on daily.dev](https://daily.dev/posts/claude-opus-4-rag-build-an-ai-app-with-embeddings-knowledge-graphs-mvp-unplugged-hfudqwg1l) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Claude Opus 4 + RAG: Build an AI App with Embeddings & Knowledge Graphs | MVP Unplugged","url":"https://daily.dev/posts/claude-opus-4-rag-build-an-ai-app-with-embeddings-knowledge-graphs-mvp-unplugged-hfudqwg1l","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/claude-opus-4-rag-build-an-ai-app-with-embeddings-knowledge-graphs-mvp-unplugged-hfudqwg1l"},"datePublished":"2026-07-14T16:18:01.845Z","dateModified":"2026-07-14T16:18:20.697Z","description":"Michael, a Microsoft MVP, demonstrates AI Story Builders — an open-source app for writing novels with AI assistance. 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