--- title: "React & React Native Blog | AI Engineering | Callstack (page 5 of 33)" description: "Read practical articles on React, React Native, cross-platform development, and AI workflows from Callstack engineers building the tools and products." url: https://www.callstack.com/blog/5 updated: 2026-11-06T10:13:51.208Z --- # React & React Native Blog | AI Engineering | Callstack (page 5 of 33) Read practical articles on React, React Native, cross-platform development, and AI workflows from Callstack engineers building the tools and products. Articles ## Articles for developers, by developers Technical articles on React, React Native, and AI engineering. We share what we learn from building products, maintaining open source, and putting agents to work across software delivery. ### Featured - [Building a Software Factory: Write Specs an Agent Can Build From](https://www.callstack.com/blog/building-a-software-factory-write-specs-an-agent-can-build-from) (AI, 11/6/2026): Szymon Chmal uses a Simlock device-cleanup feature to explain how he plans work for coding agents. Follow the process from code research and product decisions to testable tasks, independent specification checks, and human approval. (by Szymon Chmal) ### Articles, page 5 - [Unlocking Expo Updates in an Isolated Brownfield Architecture with SDK 55](https://www.callstack.com/blog/unlocking-expo-updates-in-an-isolated-brownfield-architecture-with-sdk-55) (Brownfield, 5/18/2026): Expo Updates used to be a pain point for teams running an Isolated Brownfield architecture. This guide shows how to get it working with Expo SDK 55, including iOS packaging, the current Android workaround, and end-to-end OTA update testing. If you're shipping React Native inside an existing native app, this walkthrough helps you get setup faster without guessing through the hard parts. (by Hur Ali) - [Codex Ambassador: Q1 Recap Across 5 Cities](https://www.callstack.com/blog/codex-ambassador-q1-recap-across-5-cities) (Developer Experience, 5/5/2026): Over the past few months, we got to host Codex events across 5 cities and 2 continents. Each one had a different format and a different crowd, from big meetup energy in Berlin to one-on-one sessions in Miami. This recap covers what happened and what we want to do next. (by Mike Grabowski) - [React Native production lessons from React Universe Meetup x Zalando](https://www.callstack.com/blog/react-native-production-lessons-from-react-universe-meetup-x-zalando) (React Native, 4/28/2026): React Native has already proven it can ship production apps. The harder question is how it performs in brownfield migrations, feed-heavy interfaces, native API integrations, and hardware-constrained environments. This article shares four practical lessons from React Universe Meetup x Zalando in Berlin. (by Mike Grabowski) - [When to Use Apple Foundation Models on Mobile](https://www.callstack.com/blog/when-to-use-apple-foundation-models-on-mobile) (AI, 4/27/2026): Apple Foundation Models are most useful on mobile when the task is small, fast, local, and not worth a cloud round trip. The real value is not replacing cloud models entirely, but using on-device AI where latency, privacy, and frequency matter most. (by Lech Kalinowski) - [How Skillgym Helps You Verify Agent Skills Still Work After Every Change](https://www.callstack.com/blog/how-skillgym-helps-you-verify-agent-skills-still-work) (AI, 4/17/2026): Small edits to a SKILL.md can change agent behavior in ways that are hard to spot manually. This article shows how skillgym helps you test skills against real agent runners, validate the right behavior, and catch regressions before they reach production. (by Szymon Chmal) - [Agent React DevTools: Give AI Agents Access to React Internals](https://www.callstack.com/blog/agent-react-devtools-give-ai-agents-access-to-react-internals) (Testing, 4/14/2026): Agent React DevTools gives AI agents direct access to the React component tree, state, and performance data. Instead of relying only on UI snapshots, agents can now inspect what happens inside React and debug issues with proper context. This enables more reliable QA, better performance analysis, and deeper automation for React and React Native apps. (by Mike Grabowski) - [How We Optimized Agent Device for Mobile App Automation](https://www.callstack.com/blog/how-we-optimized-agent-device-for-mobile-app-automation) (Testing, 4/3/2026): AI agents are powerful tools for mobile automation, but running them can get expensive and slow if they consume too many tokens. In this post, we break down how we optimized Agent Device to cut LLM token usage in half and speed up execution by 33%. (by Michał Pierzchala) - [Agents Commander: A Lightweight Interface for Multi-Agent CLI Workflows](https://www.callstack.com/blog/agents-commander-a-lightweight-interface-for-multi-agent-cli-workflows) (AI, 4/1/2026): Agents Commander introduces a practical way to manage multi-agent environments directly in the CLI. With a minimal communication protocol, it enables agents to collaborate without complex infrastructure or rigid APIs. (by Lech Kalinowski) - [Brownie: A Type-Safe Shared-State Workflow for Brownfield React Native](https://www.callstack.com/blog/brownie-a-type-safe-shared-state-workflow-for-brownfield-react-native) (Brownfield, 3/31/2026): For teams embedding React Native into existing native apps, Brownie reduces state-management glue code at the integration boundary. One TypeScript schema drives shared state across React Native, iOS, and Android with a workflow built for production use. (by Hur Ali) - [Announcing Codex Plugins for React Native Development](https://www.callstack.com/blog/announcing-codex-plugins-for-react-native-development) (AI, 3/27/2026): Skills work well in isolation, but most React Native work spans multiple concerns at once. This post covers how plugins bundle related skills into a single installable package, and walks through two we're releasing today: one for React Native development, one for testing with device automation. (by Mike Grabowski) [Previous](https://www.callstack.com/blog/4) · Page 5 of 33 · [Next](https://www.callstack.com/blog/6) Hire us ## Need React, React Native, or AI engineering expertise? Bring in senior engineers to build your product, solve technical challenges, or put agents to work across delivery. [Book consultation](https://www.callstack.com/contact) Insights ## Your next read or watch starts here Explore articles, interviews, and demos on React, React Native, and AI engineering, with lessons from the people building the tools. [View all](https://www.callstack.com/insights) - [Building a Software Factory: Write Specs an Agent Can Build From](https://www.callstack.com/blog/building-a-software-factory-write-specs-an-agent-can-build-from) (Nov 6 · Article): Learn how to research requirements, resolve open decisions, and write testable specs that AI coding agents can implement without the planning conversation. - [ Large-Scale Migrations With Coding Agents: Planning, Verification, and Rollback](https://www.callstack.com/blog/large-scale-migrations-with-coding-agents-planning-verification-and-rollback) (Nov 4 · Article): Plan codebase migrations with coding agents using reviewable requirements, verification checks, staged rollouts, and defined rollback criteria. - [Conversational Banking: From Customer Questions to Authorized Actions](https://www.callstack.com/blog/conversational-banking-from-customer-questions-to-authorized-actions) (Nov 2 · Article): Explore conversational banking architecture through a card-dispute example, covering tool access, authorization, execution, observability, and human handoff. - [How AI Agents Can Cut Manual QA by 30%](https://www.callstack.com/blog/how-ai-agents-can-cut-manual-qa-by-30) (Oct 30 · Article): Explore an agentic QA workflow targeting 30% less manual effort across mobile, web, and TV, with test selection, failure triage, and validation. - [Building a Software Factory: The Night My Agents Waited for Me](https://www.callstack.com/blog/building-a-software-factory-the-night-my-agents-waited-for-me) (Oct 28 · Article): Learn how permissions, review limits, and missing product decisions stalled two overnight coding agent runs, and how their maintainer revised the workflow. - [Your AI Coding Agent Still Needs an Architecture](https://www.callstack.com/blog/your-ai-coding-agent-still-needs-an-architecture) (Oct 22 · Article): Use explicit contracts, behavior tests, and dependency checks to guide AI coding agents and review their changes through a TypeScript favorites example. - [Who Left the Agents Running? React Native Software Factories](https://www.callstack.com/events/who-left-the-agents-running-react-native-software-factories) (Oct 15 · Live Stream): Join Kewin Wereszczyński and Szymon Chmal to explore what can go wrong in a React Native software factory overnight and the controls that keep agents on track. - [When Coding Gets Faster, What Breaks Next?](https://www.callstack.com/podcasts/when-coding-gets-faster-what-breaks-next) (Oct 14 · Podcast): Matt Hargett explains how AI moves bottlenecks across testing, deployment, infrastructure, support, and the rest of software delivery. - [MCP and Supervisor Agents in eBay's Monitoring Workflow With Leonel Candido da Silva](https://www.callstack.com/podcasts/mcp-and-supervisor-agents-in-ebays-monitoring-workflow-with-leonel-candido-da-silva) (Oct 13 · Podcast): Leonel Candido da Silva explains eBay's agentic monitoring workflow: specialized agents, MCP, PagerDuty reports, and plans to learn from past incidents. - [AI Agent Observability With Ivana Huckova and Sven Großmann](https://www.callstack.com/podcasts/ai-agent-observability-with-ivana-huckova-and-sven-grossmann) (Oct 12 · Podcast): Grafana's Ivana Huckova and Sven Großmann discuss AI agent observability, coding-agent costs, PR analytics, secret redaction, and local guardrails. - [Automating Mobile QA with Cloud Agents](https://www.callstack.com/events/automating-mobile-qa-with-cloud-agents-2) (Oct 7 · Talk): Michał Pierzchała shows how cloud-based QA agents can test real iOS and Android user flows and bring screenshots, recordings, and logs into pull requests. - [Can Jev Make AI Agent Decisions Faster?](https://www.callstack.com/events/can-jev-make-ai-agent-decisions-faster) (Oct 1 · Live Stream): Explore Jev with Kewin Wereszczyński and Szymon Chmal: how it works, its approach to faster agent decisions, and possible local alternatives. - [The Hard Way vs. The React Native AI SDK Way: Stop Writing Custom Modules for Every Model](https://www.callstack.com/tutorials/the-hard-way-vs-the-react-native-ai-sdk-way-stop-writing-custom-modules-for-every-model) (Mar 19 · Tutorial): Learn how React Native AI uses a unified provider model to switch between cloud and on-device LLMs without rewriting application logic, enabling reliable AI experiences online and offline. - [Build Smarter Apps: Tool Calling & AI Orchestration Explained](https://www.callstack.com/tutorials/build-smarter-apps-tool-calling-ai-orchestration-explained) (Mar 12 · Tutorial): Learn how on-device models in React Native can call tools, interact with external APIs, and return structured outputs you can use directly in application logic. - [MLC LLM + React Native: On-Device AI Without the Pain](https://www.callstack.com/tutorials/mlc-llm-react-native-on-device-ai-without-the-pain) (Mar 5 · Tutorial): Learn how to run third-party on-device LLMs in React Native using MLC LLM. Choose your models, run them efficiently across platforms, and keep a unified JavaScript API with React Native AI. - [Intelligent Fallbacks with Apple Intelligence in React Native](https://www.callstack.com/tutorials/intelligent-fallbacks-with-apple-intelligence-in-react-native) (Feb 24 · Tutorial): Learn how to use Apple’s built-in Foundation Models in React Native apps, reduce memory usage, and enable fast, fully on-device AI with React Native AI Apple. - [What Is the React Native AI SDK? A Complete Intro & Quickstart](https://www.callstack.com/tutorials/what-is-the-react-native-ai-sdk-a-complete-intro-quickstart) (Feb 10 · Tutorial): Learn why on-device AI matters for React Native apps, how local LLMs behave offline, and what problems React Native AI is designed to solve from day one. - [Implementing an Android TurboModule with Kotlin](https://www.callstack.com/tutorials/implementing-an-android-turbomodule-with-kotlin) (Jan 29 · Tutorial): Learn how to implement a React Native TurboModule on Android, from the TypeScript spec and Codegen to the Kotlin implementation and package registration. - [Working with Different Threads in Swift TurboModules](https://www.callstack.com/tutorials/working-with-different-threads-in-swift-turbomodules) (Jan 19 · Tutorial): Learn how JavaScript, native module, background, and main threads interact in React Native TurboModules, and how to use GCD queues to run async work safely in Swift. - [How to Add Type-Safe Constants to Swift TurboModules](https://www.callstack.com/tutorials/how-to-add-type-safe-constants-to-swift-turbomodules) (Jan 9 · Tutorial): Learn how to expose typed, immutable constants from a Swift TurboModule using Codegen, and get full end-to-end type safety between native and JavaScript. - [Adding Event Emitters to Your TurboModule in Swift](https://www.callstack.com/tutorials/adding-event-emitters-to-your-turbomodule-in-swift) (Dec 30 · Tutorial): Learn how to emit native events from a Swift TurboModule and subscribe to them in JavaScript, including proper memory management and Codegen integration. - [Writing Your First TurboModule in Swift](https://www.callstack.com/tutorials/writing-your-first-turbomodule-in-swift) (Dec 22 · Tutorial): Learn how to build a fully working TurboModule in Swift, integrate it with Codegen, and bridge it through Objective‑C inside an Expo app.