--- title: QCon London 2026: Rewriting All of Spotify's Code Base,... description: Spotify engineers presented Honk, an internal AI-powered coding agent that performs continuous large-scale code migrations across Spotify's entire codebase.... canonical: https://daily.dev/posts/qcon-london-2026-rewriting-all-of-spotify-s-code-base-all-the-time-b8yyom3nt twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: QCon London 2026: Rewriting All of Spotify's Code Base, All the Time | daily.dev og:description: Spotify engineers presented Honk, an internal AI-powered coding agent that performs continuous large-scale code migrations across Spotify's entire codebase.... og:url: https://daily.dev/posts/qcon-london-2026-rewriting-all-of-spotify-s-code-base-all-the-time-b8yyom3nt og:image: https://api.daily.dev/og/posts/b8yYOM3Nt.png og:image:alt: QCon London 2026: Rewriting All of Spotify's Code Base, All the Time 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. # QCon London 2026: Rewriting All of Spotify's Code Base, All the Time **[InfoQ](https://daily.dev/sources/infoq)** · 4 min read · 1 upvotes · 0 comments ## Summary Spotify engineers presented Honk, an internal AI-powered coding agent that performs continuous large-scale code migrations across Spotify's entire codebase. Before Honk, deterministic scripts could handle 70% of migrations, reducing timelines from nearly a year to under a week, but the remaining 30% required LLM-based reasoning to handle edge cases. Honk packages the full software development lifecycle — requirements, code generation, building, testing, and iteration — and now achieves 1,000 merged pull requests every 10 days. Key architectural decisions include separating agent runtime from verification runtime and integrating with Slack for a 'code from anywhere' workflow. The new bottleneck is PR review rather than code generation, prompting strategies around culture shifts, tooling improvements, and codebase standardization to create a virtuous cycle of higher-quality agent output and easier reviews. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Spotify says its best developers haven’t written a line of code since December, thanks to AI](https://daily.dev/posts/spotify-says-its-best-developers-haven-t-written-a-line-of-code-since-december-thanks-to-ai-iks6izphn) · TechCrunch · 44 upvotes · 14 comments - [Coding Is No Longer the Constraint: Scaling Developer Experience to Teams and Agents at Spotify](https://daily.dev/posts/coding-is-no-longer-the-constraint-scaling-developer-experience-to-teams-and-agents-at-spotify-fas1vty9a) · Spotify Labs · 1 upvotes · 0 comments - [Let’s Talk Agentic Development: Spotify x Anthropic Live](https://daily.dev/posts/let-s-talk-agentic-development-spotify-x-anthropic-live-k2o9xlzz4) · Spotify Labs · 1 upvotes · 0 comments - [QCon London 2026: From Prompt to Production: How Spotify Builds Internal Tools in Days with AI](https://daily.dev/posts/qcon-london-2026-from-prompt-to-production-how-spotify-builds-internal-tools-in-days-with-ai-lznlsnyby) · InfoQ · 0 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm), [#spotify](https://daily.dev/tags/spotify) [View this post on daily.dev](https://daily.dev/posts/qcon-london-2026-rewriting-all-of-spotify-s-code-base-all-the-time-b8yyom3nt) ```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":"QCon London 2026: Rewriting All of Spotify's Code Base, All the Time","url":"https://daily.dev/posts/qcon-london-2026-rewriting-all-of-spotify-s-code-base-all-the-time-b8yyom3nt","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/qcon-london-2026-rewriting-all-of-spotify-s-code-base-all-the-time-b8yyom3nt"},"datePublished":"2026-03-18T15:07:48.078Z","dateModified":"2026-03-18T15:08:09.576Z","description":"Spotify engineers presented Honk, an internal AI-powered coding agent that performs continuous large-scale code migrations across Spotify's entire codebase....","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/26136dd1332e4a77417d7f3e49bc732c?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/26136dd1332e4a77417d7f3e49bc732c?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"InfoQ","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"InfoQ","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/afc3bced3e1e4b188dd9127017a60e0c","url":"https://daily.dev/sources/infoq"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/qcon-london-2026-rewriting-all-of-spotify-s-code-base-all-the-time-b8yyom3nt","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"llm,spotify","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"InfoQ","item":"https://daily.dev/sources/infoq"},{"@type":"ListItem","position":3,"name":"QCon London 2026: Rewriting All of Spotify's Code Base, All the Time"}]} ```