--- title: Building Reviewable Mobile QA Agents With Vercel Eve description: Callstack engineers migrated a mobile QA agent from a monolithic AI SDK TypeScript loop to Vercel Eve, a new filesystem-first TypeScript framework for durable... canonical: https://daily.dev/posts/building-reviewable-mobile-qa-agents-with-vercel-eve-olg9jk6le twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Building Reviewable Mobile QA Agents With Vercel Eve | daily.dev og:description: Callstack engineers migrated a mobile QA agent from a monolithic AI SDK TypeScript loop to Vercel Eve, a new filesystem-first TypeScript framework for durable... og:url: https://daily.dev/posts/building-reviewable-mobile-qa-agents-with-vercel-eve-olg9jk6le og:image: https://api.daily.dev/og/posts/OLg9JK6lE.png og:image:alt: Building Reviewable Mobile QA Agents With Vercel Eve 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. # Building Reviewable Mobile QA Agents With Vercel Eve **[Callstack Blog](https://daily.dev/sources/callstack-blog)** · 10 min read · 2 upvotes · 0 comments ## Summary Callstack engineers migrated a mobile QA agent from a monolithic AI SDK TypeScript loop to Vercel Eve, a new filesystem-first TypeScript framework for durable agents. The agent runs on every pull request via EAS Workflows, infers a verification plan from PR metadata, controls iOS simulators and Android emulators via agent-device, and posts results with screenshots back to GitHub. The Eve migration separates concerns into distinct files (instructions.md for behavior, agent.ts for model config, typed tools), replaces a write_report tool with structured outputSchema, and reduces scaffolding code by ~130 lines. The post notes Eve is still in beta and this use case doesn't exercise its full durability features (no human-in-the-loop pausing), but the framework makes the agent more reviewable and maintainable within an existing CI pipeline. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Introducing eve](https://daily.dev/posts/introducing-eve-at3krhctw) · Vercel · 41 upvotes · 3 comments - [Introducing eve, an open-source agent framework](https://daily.dev/posts/introducing-eve-an-open-source-agent-framework-fdo6n1gyy) · Vercel · 180 upvotes · 4 comments --- Tags: [#testing](https://daily.dev/tags/testing), [#typescript](https://daily.dev/tags/typescript), [#cicd](https://daily.dev/tags/cicd), [#ai-agents](https://daily.dev/tags/ai-agents) [View this post on daily.dev](https://daily.dev/posts/building-reviewable-mobile-qa-agents-with-vercel-eve-olg9jk6le) ```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":"Building Reviewable Mobile QA Agents With Vercel Eve","url":"https://daily.dev/posts/building-reviewable-mobile-qa-agents-with-vercel-eve-olg9jk6le","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/building-reviewable-mobile-qa-agents-with-vercel-eve-olg9jk6le"},"datePublished":"2026-06-19T11:08:03.566Z","dateModified":"2026-06-20T08:20:24.642Z","description":"Callstack engineers migrated a mobile QA agent from a monolithic AI SDK TypeScript loop to Vercel Eve, a new filesystem-first TypeScript framework for durable...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/44075331fd66c982ba99c583ea9dcaf2?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/44075331fd66c982ba99c583ea9dcaf2?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Callstack Blog","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":"Callstack Blog","logo":"https://media.daily.dev/image/upload/s--3qItoroi--/f_auto,q_auto/v1774179048/logos/callstack-blog?_a=BAMAMiWQ0","url":"https://daily.dev/sources/callstack-blog"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/building-reviewable-mobile-qa-agents-with-vercel-eve-olg9jk6le","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"testing,typescript,cicd,ai-agents","timeRequired":"PT10M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Callstack Blog","item":"https://daily.dev/sources/callstack-blog"},{"@type":"ListItem","position":3,"name":"Building Reviewable Mobile QA Agents With Vercel Eve"}]} ```