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<div style="display: none; max-height: 0px; overflow: hidden;">Codex CLI is a cross-platform local software agent. The core agent loop orchestrates interactions between the user, the model, and various tools </div>
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<h1><strong> TLDR Dev <span id="date">2026-02-03</span></strong></h1>
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<p>They secretly power every meeting bot and desktop recording app, from Cluely to Hubspot to Clickup.</p>
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<strong>Unrolling the Codex agent loop (20 minute read)</strong>
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OpenAI's Codex CLI is a cross-platform local software agent. The core agent loop orchestrates interactions between the user, the model, and various tools, iteratively building prompts from user input, system instructions, and tool definitions, querying the model, executing requested tool calls, and appending results to the prompt. To manage performance and context window limitations, Codex uses prompt caching and conversation compaction to summarize past interactions.
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<strong>Claude Code's renderer is more complex than a game engine (12 minute read)</strong>
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Through profiling, Claude Code was found to spend 70% of its time on `futex` calls and make 89,000 `sched_yield` calls, showing inefficient thread spinning rather than proper I/O waiting. Quantitatively, Claude Code executes billions of instructions per "frame" for text rendering and network I/O, an order of magnitude more than SM64 uses for its 3D world.
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There's a common issue in responsive web design where layouts switch to mobile versions prematurely, leading to awkward designs. To address this, it's best to implement more breakpoints, use container queries, and use modern CSS features like Grid and Flex.
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<strong>Being “Just a Developer” Isn't Enough Anymore (7 minute read)</strong>
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For a decade, being "just a developer" focused only on writing code was a lucrative and stable career. However, the rise of AI is making pure technical execution less valuable and more accessible. To remain valuable, developers must evolve by acquiring deep business domain knowledge and broadening their skills beyond coding to include areas like product, operations, and marketing.
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<strong>What I learned building an opinionated and minimal coding agent (40 minute read)</strong>
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This dev got frustrated with Claude Code constantly changing and adding features he didn't need, so he built his own minimal coding agent called “pi” with just 4 tools (read, write, edit, and bash) and a tiny system prompt under 1,000 tokens. He deliberately skipped everything that other agents have (no MCP servers, no permission prompts, and no plan modes). Despite being so simple, it scored competitively on Terminal-Bench, proving that less can actually be more at times.
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<strong>AI agents get current Clerk patterns now (Sponsor)</strong>
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AI coding tools like Cursor and Copilot generate outdated patterns. Clerk Skills gives agents current authentication knowledge via installable packages. One command: <em>npx skills add clerk/skills</em>. Handles custom flows, B2B auth setup, database syncing, and more. Works with Claude Code, Cursor, Windsurf, and Copilot.<p></p><p><a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fgo.clerk.com%2Fs01u1Iw/1/0100019c2366bd50-b0ffb11c-2399-44c6-b9e9-bda7a29fc1bf-000000/SHNaNpLXWVbHCcj23FQagLiVNKMOzDwE3C-PgM0pErc=443" rel="noopener noreferrer nofollow" target="_blank"><span>Install Clerk Skills</span></a>
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OpenAI has launched the Codex app for macOS for managing multiple AI agents, running work in parallel, and collaborating on long-running tasks. It also includes AI agent skill management and the ability to create automations for scheduled background work.
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Shorlabs makes the deployment, management, and scaling of Python or Node.js backend apps easier. It uses AWS Lambda to offer a pay-per-use, automatically scalable solution, and also has one-click GitHub deployments, automatic runtime detection, custom subdomains, configurable compute resources, and real-time logs.
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Moltworker is an experimental project that enables OpenClaw, a personal AI assistant, to run within a Cloudflare Sandbox on Cloudflare Workers. This AI assistant has a web-based control UI, supports multiple chat platforms like Telegram and Discord, and has persistent conversations with extensible AI agent capabilities.
</span>
</span>
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<div style="text-align: center;"><strong><h1>Miscellaneous</h1></strong></div>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fengineering.monday.com%2Fhow-we-use-ai-to-turn-figma-designs-into-production-code%2F%3Futm_source=tldrdev/1/0100019c2366bd50-b0ffb11c-2399-44c6-b9e9-bda7a29fc1bf-000000/36G-bEMy-qaI8Obpxg-JDqtuOWw0G3qEFyF-3KtojYw=443">
<span>
<strong>How We Use AI to Turn Figma Designs into Production Code (8 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
Monday discovered that asking AI to directly generate code from Figma produced messy output with hard-coded values that didn't follow their design system. Instead, its team built an MCP that made their design system machine-readable and a LangGraph agent that analyzes the design through 11 steps (figuring out which components to use, resolving design tokens, and planning accessibility), then returns a structured context that the coding model uses to generate production-ready code.
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<span>
<strong>Context Management and MCP (11 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
MCP's primary value is "steering" the LLM agent by exposing well-described, always-on tools that generate LLM-catered responses and hints. While CLIs can offer some steering, they don't have this persistent context, and common workarounds like "Skills" or progressive disclosure are not as reliable due to context rot. Using subagents may be the solution.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fwww.wiz.io%2Fblog%2Fexposed-moltbook-database-reveals-millions-of-api-keys%3Futm_source=tldrdev/1/0100019c2366bd50-b0ffb11c-2399-44c6-b9e9-bda7a29fc1bf-000000/qRKxMrFhwvVMBy3eO_d1hamPCvmknBxde3_VeMoCaiY=443">
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<strong>Hacking Moltbook: AI Social Network Reveals 1.5M API Keys (13 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
Wiz researchers found security flaws in Moltbook, a new AI social network, due to a misconfigured Supabase database. This vulnerability granted full read and write access, exposing 1.5 million API authentication tokens, 35,000 user emails, private messages, and even third-party credentials. The vibe-coded platform, initially claiming 1.5 million AI agents, was largely made of only 17,000 human owners controlling fleets of bots.
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<h1><strong>Quick Links</strong></h1>
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<strong>I Hate Fish (15 minute read)</strong>
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Effective methods must be "hostile" by aggressively pruning irrelevant tasks and relying on simple, consistent habits rather than complex features.
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<strong>The RAG Flywheel (6 minute read)</strong>
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The RAG Flywheel is a systematic, data-driven framework for building AI applications using RAG that continuously improve in production through ongoing measurement, feedback, and optimization.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2F80.lv%2Farticles%2Fhow-to-create-a-monster-collector-game-with-farming-elements%3Futm_source=tldrdev/1/0100019c2366bd50-b0ffb11c-2399-44c6-b9e9-bda7a29fc1bf-000000/RkOcE2IenW3nGdbxUX_HBc4P-rCo_J7Ma9EQK4oaPrQ=443">
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<strong>Creating a Monster Collector Game with Farming Elements (10 minute read)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
An end-to-end walkthrough of the inspiration, design, and Godot-driven development of "Bloomies," a pixel-art desktop monster collector game combining farming elements with automatic monster battles.
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<span>
<strong>The AI Consulting Playbook (Website)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
This is a playbook for technical engineers to start AI consulting for companies that want an AI transformation for their business.
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