Amazon vs USPS 📪, Google's vibe designer 🧑‍🎨, how Codex works 🤖

Amazon's negotiations with the US Postal Service have fallen apart. Amazon last year committed triple the size of its rural delivery network. ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌  ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ 

Sign Up |Advertise|View Online TLDR Together With TLDR 2026-03-19 Inside Reddit's IT playbook for AI and scale (Sponsor) Under pressure to modernize and get AI-ready fast, but unsure where to start? In this fireside chat, Reddit CISO and Head of Corporate Engineering Sean Joerg shares the playbook his team used to unify work and build an AI‑ready foundation. Join to learn how Reddit: Led change management, gained cross-functional buy-in, and set up guardrails to safely unlock Al and automation, while also keeping one of the world's busiest websites working as intended. Sean will share his top recommendations for anyone embarking on a modernization drive. Join live on April 6, 2026 📱 Big Tech & Startups Stitch by Google (5 minute read) Stitch is a vibe design tool with an AI-native canvas that can hold and reason across images, code, and text simultaneously. The design agent understands users' entire canvas context, allowing them to swap images, generate product briefs, or mix mobile and desktop screens on the same canvas. Users can vibe design with just their voice, and also ask for design critiques and variations. The tool creates instant prototypes so users can preview the interactive app flow. Amazon says US Postal Service 'walked away at the eleventh hour' in negotiations (3 minute read) Amazon's contract renewal negotiations with the US Postal Service have fallen apart. The company plans to sharply reduce the number of packages it sends through the Postal Service when the contract expires at the end of September. It has submitted a bid as part of the Postal Service's auction process with the hope of continuing the partnership, even at a reduced level. Amazon last year committed to spending roughly $4 billion by the end of 2026 to triple the size of its rural delivery network. 🚀 Science & Futuristic Technology A private space company has a radical new plan to bag an asteroid (4 minute read) TransAstra, a Los Angeles-based company, plans to fly out to a smallish, near-Earth asteroid, throw a large bag around it, and bring the body back to a safe gathering point near Earth. One of its customers has agreed to fund a feasibility study of the mission. The study will be completed by May, after which the company will further refine its mission plan. If fully funded, the mission could rendezvous with an asteroid as early as 2028. Why is Starlink on planes so good? (6 minute read) Starlink is a true technological leap over every other form of airline Wi-Fi. The older forms of satellite Wi-Fi are fundamentally constrained by the laws of physics. Starlink's network can provide global coverage, and its lower orbit means that planes are much closer. However, the lower orbit also means much more damage to the satellites, causing them to degrade in about five years. 💻 Programming, Design & Data Science Get the CRM that automatically captures every email, call, and meeting — FREE for 3 months (Sponsor) Every deal you've lost to a forgotten follow-up was preventable. Lightfield is the first AI-native CRM with complete customer memory — it updates itself, drives next steps, and answers questions so you stop losing deals. TLDR readers get 3 months free with code: TLDRTS23 How OpenAI Codex Works (12 minute read) OpenAI Codex is a coding agent that can write features, fix bugs, answer questions about codebases, and propose pull requests. Each task runs in its own isolated cloud sandbox, and users can assign multiple tasks in parallel while monitoring progress in real time. The system has three layers: the agent loop, prompt and context management, and the multisurface architecture that lets one agent serve many different interfaces. Understanding how the system works helps users work more effectively. Machine Payments Protocol (Website) The Machine Payments Protocol is an open protocol for machine-to-machine payments. It allows developers to charge for API requests, tool calls, or content. Agents and apps pay per request in the same HTTP call. The protocol works with stablecoins, cards, and bank transfers in any currency. 🎁 Miscellaneous Ask HN: What is it like being in a CS major program these days? (Hacker News Thread) The field of computer science is changing as AI is now able to perform many of the tasks expected of junior developers. This is causing some students to feel apathetic about their career potential in the field. Teachers face challenges with figuring out how to teach the fundamentals that students will need to become senior engineers without the experience that working as a junior provides. The Robotic Tortoise & the Robotic Hare (1 minute read) Local models can often run faster than large proprietary models, and without much decline in performance. Faster responses mean quicker and more revision cycles. Some tasks need the increased performance of larger models, but many everyday tasks will benefit more from tighter feedback loops. The smartest AI is not always the best AI to get the job done. ⚡ Quick Links 6 Hidden Productivity Gaps Costing You 30% Dev Capacity (Sponsor) Your metrics may look healthy, but hidden inefficiencies are slowing your team down. Download the guide We've been building an internal Claude Code plugin system (4 minute read) Intercom's internal Claude Code plugin system has 13 plugins, over 100 skills, and hooks that turn Claude into a full-stack engineering platform. Software is eating itself (3 minute read) Software has always wanted to be free, and it eventually will be, so the business of software needs a different approach. A sufficiently detailed spec is code (11 minute read) Coding agents can't reliably fill in missing clarity and detail as they aren't mind readers, and even if they were, there's not much they can do if your own thoughts are confused. TLDR is hiring a Senior Software Engineer, Applied AI ($250k-$350k, Fully Remote) As the first engineer on TLDR's new Applied AI team, you'll build AI agents to automate end-to-end workflows and lead our context engineering project to allow non-technical teammates create their own AI workflows. Learn more. Google Engineers Launch "Sashiko" For Agentic AI Code Review Of The Linux Kernel (1 minute read) Sashiko ingests patches from mailing lists, analyzes them using AI-powered prompts, and provides feedback to help maintainers and developers ensure code quality and adherence to kernel standards. Meta will pay Instagram, TikTok, and YouTube creators with big followings to post on Facebook (2 minute read) Meta's new Creator Fast Track program offers creators with an established following guaranteed monthly payments and increased reach on Facebook. We Have Learned Nothing (28 minute read) Any time someone insists on a method for how to build a successful startup, you should do something different. Love TLDR? Tell your friends and get rewards! Share your referral link below with friends to get free TLDR swag! https://refer.tldr.tech/7c97ce4b/ Track your referrals here. Want to advertise in TLDR? 📰 If your company is interested in reaching an audience of tech executives, decision-makers and engineers, you may want to advertise with us. Want to work at TLDR? 💼 Apply here, create your own role or send a friend's resume to jobs@tldr.tech and get $1k if we hire them! TLDR is one of Inc.'s Best Bootstrapped businesses of 2025. 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