--- title: How to Build a Research Assistant using Deep Agents description: Step-by-step guide to building a real-time research assistant using LangChain's Deep Agents framework, Tavily web search, and CopilotKit. Covers the full... canonical: https://daily.dev/posts/lxuqtl3m0 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How to Build a Research Assistant using Deep Agents | daily.dev og:description: Step-by-step guide to building a real-time research assistant using LangChain's Deep Agents framework, Tavily web search, and CopilotKit. Covers the full... og:url: https://daily.dev/posts/lxuqtl3m0 og:image: https://api.daily.dev/og/posts/lxUqtl3m0.png og:image:alt: Post cover image 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. # How to Build a Research Assistant using Deep Agents **[Anmol Baranwal](https://daily.dev/sources/iwzfqwgzjuz3tmf4zw9az)** · [@anmolbaranwal](https://daily.dev/anmolbaranwal) · 3 upvotes · 0 comments ## Summary Step-by-step guide to building a real-time research assistant using LangChain's Deep Agents framework, Tavily web search, and CopilotKit. Covers the full stack: a Next.js frontend with live streaming of agent state (todos, files, sources) via AG-UI, and a FastAPI backend hosting a multi-step Deep Agent that plans, delegates to sub-agents, and writes research reports. Key patterns include thread-isolated sub-agents to prevent event stream leakage, CopilotKit middleware for frontend-agent state sync, and a two-panel UI showing the agent's work in real time. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [How I Built an Agentic AI Research Assistant Using LangGraph and Large Language Models](https://daily.dev/posts/how-i-built-an-agentic-ai-research-assistant-using-langgraph-and-large-language-models-dg5wempfs) · Medium · 0 upvotes · 0 comments - [The complete guide to LiveKit Agents](https://daily.dev/posts/the-complete-guide-to-livekit-agents-jauxhrspu) · Flavio Copes · 0 upvotes · 0 comments - [Deep Agents v0.5](https://daily.dev/posts/deep-agents-v0-5-x8sraelyt) · LangChain · 1 upvotes · 0 comments - [How to Build a Multi-Agent Research Assistant in Python](https://daily.dev/posts/how-to-build-a-multi-agent-research-assistant-in-python-tywqotoko) · Machine Learning Mastery · 2 upvotes · 0 comments --- Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#fastapi](https://daily.dev/tags/fastapi), [#langgraph](https://daily.dev/tags/langgraph), [#nextjs](https://daily.dev/tags/nextjs) [View this post on daily.dev](https://daily.dev/posts/lxuqtl3m0) ```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":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/lxuqtl3m0","headline":"How to Build a Research Assistant using Deep Agents","text":"Shared: How to Build a Research Assistant using Deep Agents","url":"https://daily.dev/posts/lxuqtl3m0","datePublished":"2026-02-26T08:59:13.424Z","dateModified":"2026-03-15T08:35:10.192Z","author":{"@type":"Person","name":"Anmol Baranwal","url":"https://daily.dev/anmolbaranwal","image":"https://avatars.githubusercontent.com/u/74038190?v=4","description":"Just a tech guy who loves writing and building cool stuff","interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"EndorseAction"},"userInteractionCount":21420}},"image":"https://media.daily.dev/image/upload/s--VDukGCjf--/f_auto/v1722860399/public/Placeholder%2002","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"sharedContent":{"@type":"WebPage","url":"https://api.daily.dev/r/E4Tesgf3O"},"isPartOf":{"@type":"WebPage","url":"https://daily.dev/sources/iwzfqwgzjuz3tmf4zw9az","name":"Anmol Baranwal"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Anmol Baranwal","item":"https://daily.dev/sources/iwzfqwgzjuz3tmf4zw9az"},{"@type":"ListItem","position":3,"name":"How to Build a Research Assistant using Deep Agents"}]} ```