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<div style="display: none; max-height: 0px; overflow: hidden;">Avoid scheduling cron jobs at 2:00 or 3:00 am, especially on Sundays, to prevent issues caused by daylight saving time changes </div>
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<h1><strong> TLDR Dev <span id="date">2025-10-28</span></strong></h1>
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<strong>Build real-time talking avatars with Decart (Sponsor)</strong>
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Give your avatar a voice, using Real-Time Lip Sync API powered by Decart.<p></p><p>Stream audio in → get perfectly synced video + speech out.</p><p>Fully <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fcookbook.decart.ai%2Fsidekick%3Futm_source=tldr/1/0100019a2a7ff797-acb138d6-94f7-43cf-8150-d7103bdd38d0-000000/rI-R-aZ-VjMrxFwNRQzL3TaQYA7D0VissPeJt5eZ2gg=429" rel="noopener noreferrer nofollow" target="_blank"><span>open-source</span></a>, in collaboration with ElevenLabs.</p>
<p>Your avatar talks, pauses, and reacts in real time, just like a person on the other side of the screen.</p>
<p>Use any voice engine. Bring your own character. Plug it into your stack.</p>
<p>Build multimodal agents, virtual humans, or real-time AI interfaces - all from one pipeline.</p>
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<p><strong>Congrats, your code has opinions now.</strong>
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<strong>When 'perfect' code fails (6 minute read)</strong>
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A critical security bug found in this dev's Next.js application was caused by a seemingly perfect one-line equality check. Due to Next.js's server function implementation, the synchronous function was unexpectedly converted to an asynchronous function returning a Promise. In JavaScript, a Promise evaluates to true in an `if` statement, effectively bypassing the security check and granting access to everyone.
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<strong>Importing vs fetching JSON (4 minute read)</strong>
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Using fetch() over the newly available JSON module imports in browsers is preferred as it has better error handling with response.status and the ability to access source text even when JSON parsing fails. The main concern with imported modules is that they are cached for the page's lifetime, creating memory leaks when importing dynamic data like search results, while fetch() allows garbage collection of unused data.
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<strong>The New Calculus of AI-based Coding (12 minute read)</strong>
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This team used AI agents to write code, resulting in a 10x increase in coding throughput. This agentic coding requires a shift in traditional software development practices, especially in testing, deployment, and team coordination, to avoid increased bugs and bottlenecks. AI agents can also be used to reduce the costs of implementing testing approaches and improving the infrastructure needed to sustain high velocity.
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<strong>AI can code, but it can't build software (3 minute read)</strong>
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An increase in requests for technical cofounders suggests a gap in what AI can currently accomplish. While AI is great at coding specific, isolated tasks, it struggles with the complexities of building and maintaining production-ready software. Software engineering is different from mere coding, as it involves integration, expansion, and long-term maintainability, which AI currently doesn't have.
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<strong>AI Native DevCon: Managing agent fleets, spec-driven development goes multiplayer, and more (Sponsor)</strong>
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On November 18-19, 2025, Tessl's AI Native DevCon is coming to Brooklyn, NYC! Speakers from Snyk, Thoughtworks, Netlify, and AWS will cover what's possible today - as well as what's still emerging: MCP security, open source tool, high-voltage developer workflows, and more. <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fainativedev.io%2Fdevcon%3Futm_source=newsletter%26utm_medium=tldr%26utm_campaign=devcon%2Bfall%2B25%26utm_id=devcon%26utm_term=ainativedev/2/0100019a2a7ff797-acb138d6-94f7-43cf-8150-d7103bdd38d0-000000/KUtlYNzHaboVsawR8d-KAOOuPPTnCjY8crH292vMz3w=429" rel="noopener noreferrer nofollow" target="_blank"><span><strong>Get 50% off with code TLDR</strong></span></a> or <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fainativedev.io%2Fdevcon%3Futm_source=newsletter%26utm_medium=tldr%26utm_campaign=devcon%2Bfall%2B25%26utm_id=devcon%26utm_term=ainativedev/3/0100019a2a7ff797-acb138d6-94f7-43cf-8150-d7103bdd38d0-000000/CbsAP7TmoJCFz_85jz25FbXaWLlq6f4G4Ib-fZaC22c=429" rel="noopener noreferrer nofollow" target="_blank"><span>watch the action online (free)</span></a>.
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<strong>GPUI Component (GitHub Repo)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
GPUI Component is a Rust library that offers a set of over 60 cross-platform UI components for building desktop applications with a modern design inspired by macOS, Windows, and shadcn/ui. It provides features like customizable themes, flexible layouts, high-performance virtualized lists and tables, a code editor with syntax highlighting and LSP support, and native Markdown and HTML rendering.
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<strong>JSON Query (Website)</strong>
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JSON Query is a small, flexible language for querying JSON data that allows filtering, sorting, and picking properties.
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<strong>Using Model Context Protocol (MCP) with Expo (7 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
The Expo MCP Server connects AI coding agents to your Expo projects so they can access docs, automate workflows, and verify your app visually. It integrates with tools like Claude Code, Cursor, and VS Code, teaching them about the Expo SDK and enabling interaction with mobile simulators and React Native DevTools. Some local capabilities include taking screenshots, opening DevTools, and automation features like tapping views and finding elements.
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<div style="text-align: center;"><strong><h1>Miscellaneous</h1></strong></div>
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A survey found that image generation has stronger personal adoption, with Google's Gemini leading in image model adoption and Veo leading in video. Organizations are seeing fast ROI, with 65% reporting returns within 12 months, and are making changes to their processes and budgets to integrate media generation models. Quality is the top factor for model selection, but cost is important for video generation APIs.
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According to leaked documents, Amazon plans to replace 600,000 US workers with robots by 2033 to automate 75% of their operations, potentially saving 30 cents per item by 2027. Amazon considered using different terminology to downplay potential job losses and improve its public image. Amazon disputes the documents, stating that they don't reflect the company's overall hiring strategy.
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Easy RISC-V is an interactive tutorial introducing RISC-V assembly programming that covers instruction syntax, computational instructions, jumps and branches, memory access, functions, privilege levels, exception handling, and a bare-bones operating system.
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Avoid scheduling cron jobs at 2:00 or 3:00 am, especially on Sundays, to prevent issues caused by daylight saving time changes, or better yet, use the UTC timezone.
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<strong>Simplify Your Code: Functional Core, Imperative Shell (2 minute read)</strong>
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Structuring code with a "functional core, imperative shell" pattern separates pure business logic from side effects (like database calls and email sending) to improve testability, maintainability, and adaptability.
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