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<div style="display: none; max-height: 0px; overflow: hidden;">ChatKit is a framework from OpenAI to help create AI-powered chat experiences by providing a ready-to-use chat interface with advanced features </div>
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<h1><strong> TLDR Dev <span id="date">2025-10-07</span></strong></h1>
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<strong>Not actively job hunting? Great, most engineers on Dex aren't (Sponsor)</strong>
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Dex works with leading AI labs and quant funds to hire engineers on salaries that can exceed $1m per year.<p></p><p>After a 15-20 minutes phone conversation with our AI career matchmaker, <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fmeetdex.ai%3Fseg=257%26utm_source=TLDR%26utm_medium=Newsletters%26utm_campaign=TLDR_SE_Newsletter/1/01000199be5acb2a-4fe1fc3c-8179-47bd-9770-beef33cbd438-000000/D2awqkowIEFphwyFPOGpAlOswJ2VXP1m0yXRgyf-FUg=425" rel="noopener noreferrer nofollow" target="_blank"><span>Dex, scans thousands of roles and companies</span></a> to identify the most interesting and compatible opportunities. </p>
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<p>Don't waste another day at a job you hate. Speak with Dex today.</p>
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<div style="text-align: center;"><span style="font-size: 36px;">🧑💻</span></div>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fblog.logrocket.com%2Fwhen-use-zod-typescript-both-developers-guide%3Futm_source=tldrwebdev/1/01000199be5acb2a-4fe1fc3c-8179-47bd-9770-beef33cbd438-000000/NLRaaCmdOiOMbKLGlZnkkZxJmSUj8Yl3lgQ0hg7pg98=425">
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<strong>TypeScript vs Zod: Clearing up validation confusion (8 minute read)</strong>
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TypeScript and Zod serve complementary rather than competing roles in development. TypeScript provides compile-time type safety during development and building, while Zod validates untrusted data at runtime. This is very useful for external inputs like API requests, user forms, and third-party data.
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<strong>The nuance of React rendering behaviour as it relates to children (7 minute read)</strong>
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React child components behave differently when rendered directly versus passed through the `children` prop. The main difference is in object reference equality: when components are rendered directly, React creates new object references on each render, causing child components to re-render, but when passed via `children`, the same object reference is reused, preventing unnecessary re-renders.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fbui.app%2Fwhy-reactive-programming-hasnt-taken-off-in-python-and-how-signals-can-change-that%2F%3Futm_source=tldrwebdev/1/01000199be5acb2a-4fe1fc3c-8179-47bd-9770-beef33cbd438-000000/HG89Kaf71SQQ8CyFzJugr-AtGkH3plhKow0LnqzD_d8=425">
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<strong>Why Reactive Programming Hasn't Taken Off in Python (And How Signals Can Change That) (11 minute read)</strong>
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Reactive programming hasn't gained traction in Python due to the complexity of existing tools like RxPY, which are better suited for event streams than state management. New libraries like reaktiv simplify state management similar to spreadsheet formulas. reaktiv uses signals, computed values, and effects to automatically manage dependencies and update values, removing manual coordination and reducing bugs.
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<div style="text-align: center;"><span style="font-size: 36px;">🧠</span></div>
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<h1><strong>Opinions & Advice</strong></h1>
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<strong>Structured Procrastination (6 minute read)</strong>
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Procrastination can be a beneficial strategy. Procrastinators can become productive by prioritizing tasks and working on less important ones to avoid the most urgent ones. The key is to have a list topped with seemingly crucial but flexible deadlines, thus motivating action on other valuable activities.
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<strong>You're Only Using 20% of Claude Code - Here's How to Unlock the Rest (6 minute read)</strong>
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Most developers are only using a small fraction of Claude Code's capabilities. To fully use it, devs should use Model Context Protocols (MCPs) correctly, set up a good CLAUDE.md configuration file, use Planning Mode for better project structure, and integrate the IDE plugin for real-time error detection and fixes.
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<strong>Build your engineering team like a dungeon party (7 minute read)</strong>
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Building engineering teams should be like building dungeon parties, with combinations of complementary roles rather than hiring only high-performing, code-output engineers. Include a warrior (senior problem-solver), tank (reliable junior executor), healer (people-focused team connector), wizard (technical architect), and rogue (versatile full-stack developer) to create a balanced team that can handle any challenge that comes their way.
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<h1><strong>Launches & Tools</strong></h1>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fdevelopers.openai.com%2Fapps-sdk%2F%3Futm_source=tldrwebdev/1/01000199be5acb2a-4fe1fc3c-8179-47bd-9770-beef33cbd438-000000/LeWB7Q7AVKL_liZaxYW3EwBl77ISAElSzA7iLNdV78U=425">
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<strong>ChatGPT Apps SDK (Website)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
OpenAI's Apps SDK is a framework that allows developers to build, test, and deploy custom apps within ChatGPT.
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<strong>OpenAI ChatKit (GitHub Repo)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
ChatKit is a framework from OpenAI to help create AI-powered chat experiences by providing a ready-to-use chat interface with advanced features. It allows devs to easily integrate conversational intelligence into their applications with a quick setup, offering deep UI customization, built-in response streaming, and interactive widgets.
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<div style="text-align: center;"><span style="font-size: 36px;">🎁</span></div></div>
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<div style="text-align: center;"><strong><h1>Miscellaneous</h1></strong></div>
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<span>
<strong>Why do LLMs freak out over the seahorse emoji? (11 minute read)</strong>
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</a>
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<br>
<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
LLMs confidently believe a seahorse emoji exists, even though it doesn't. The author demonstrates this phenomenon across various models and notes that many people also mistakenly remember a seahorse emoji. By using a logit lens, the article shows that LLMs construct a "seahorse + emoji" residual, similar to how they handle real emojis, but because there's no actual seahorse emoji, the model selects a related but incorrect emoji and then can get stuck in a loop.
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<h1><strong>Quick Links</strong></h1>
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