TLDR AI

TLDR AI 2026-02-12

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01GENERAL

Sponsored

CODE?

Legacy systems don't just age. They collapse into the "legacy black hole" - where complexity compounds until the system actively resists understanding. The architects have left. The documentation never existed. Looking for source code? Good luck.

thoughtworks.comSponsor

02HEADLINES & LAUNCHES

GLM-5: FROM VIBE CODING TO AGENTIC ENGINEERING

GLM-5 is a new MIT-licensed model with 754 billion parameters. It delivers significant improvement compared to GLM-4.7 across a wide range of academic benchmarks and achieves best-in-class performance among all open-source models on reasoning, coding, and agentic tasks. GLM-5 is designed for complex systems engineering and long-horizon agentic tasks. It has been open-sourced on Hugging Face and ModelScope and can be tried for free on Z.ai.

simonwillison.net1 min read

OPENAI WORKS ON CHATGPT SKILLS, UPGRADES DEEP RESEARCH

OpenAI's revamped Deep Research in ChatGPT introduces interactive sessions, allowing constraints on specific websites and app contexts, powered by GPT-5.2. The update benefits analysts, researchers, and professionals by enhancing source control, mid-process intervention, and report clarity. Anticipation grows for GPT-5.3, and potential ChatGPT "Skills" could standardize workflows with installable instructions for repeatable procedures.

testingcatalog.com3 min read

03DEEP DIVES & ANALYSIS

HOW CODEX BUILT AN INTERNAL PRODUCT

OpenAI described an internal experiment where a small team shipped a product whose codebase—app logic, tests, CI, docs, and tooling—was generated entirely by Codex agents rather than written by humans.

links.tldrnewsletter.com15 min read

HOW COGNITION USES DEVIN TO BUILD DEVIN

Cognition's Devin is a cloud agent platform for engineering teams. It acts like a teammate, handling tasks and creating PRs. Cognition uses Devin for tasks like targeted refactors, bug fixes, PR review, writing unit tests, modernizations and migrations, and more. As a general rule, if a junior engineer could figure it out with sufficient instructions, it's a task Devin can likely complete. However, Devin still struggles with large-scale challenges, UI aesthetics, mobile development, and anything requiring extensive testing and validation.

nader.substack.com11 min read

PERPLEXITY COMET: A REVERSING STORY

Comet is an agentic browser that features an AI model that can interact with web pages autonomously. This post details Comet's architecture and explains how the model communicates with the browser, which tools are available, and how the model perceives and interacts with web page content. The browser's architecture is mature and thoughtful. It exposes the model to access to downloads, form filling, file uploads, and arbitrary navigation.

labs.zenity.io12 min read

04ENGINEERING & RESEARCH

SKILLS IN OPENAI API

The OpenAI API now supports skills, reusable bundles of files that detail repeatable workflows. Agent Skills lets developers upload and reuse versioned skills in hosted and local shell environments. Skills should be used when developers want models to follow a repeatable workflow, use scripts or templates, or execute code in a sandbox. This post details how to create skills via API.

developers.openai.com14 min read

THE LLM CONTEXT TAX: BEST TIPS FOR TAX AVOIDANCE

The best teams building sustainable agentic products are obsessing over token efficiency. Every wasted token is setting money on fire. The context tax can be avoided with the right architecture. While context engineering isn't glamorous, it is the difference between a demo that impresses and a product that scales with decent gross margin.

nicolasbustamante.com18 min read

THE TWO PATTERNS BY WHICH AGENTS CONNECT SANDBOXES

Sandboxes provide a workspace where agents can run code, install packages, and access files. There are two architectural patterns for integrating agents with sandboxes. The first is where an agent runs inside the sandbox, and the developer communicates with it over the network. The other is when an agent runs locally on a developer's server and then calls a sandbox remotely for execution. deepagents, an open-source agent framework with built-in sandbox support, supports both patterns with a simple configuration.

links.tldrnewsletter.com8 min read

QWEN-IMAGE-2.0

Qwen-Image-2.0 is a foundation image model aimed at high-fidelity infographics and realistic 2K outputs with stronger prompt adherence.

qwen.ai9 min read

05MISCELLANEOUS

TOWARDS AUTONOMOUS MATHEMATICS RESEARCH

Alethia is a math research agent that iteratively generates, verifies, and revises solutions end-to-end in natural language. It is powered by an advanced version of Gemini Deep Think. The model can solve Olympiad problems and PhD-level exercises. This paper presents and reflects on the initial wave of mathematical research papers achieved by Alethia in collaboration with mathematicians.

github.com34 min read

CLAWDBOT AND MOLTBOOK ARE A FALSE ALARM – FOR NOW

OpenClaw and Moltbook, recent AI experiments, promise independent AI agents but fall short due to reliability and security issues. OpenClaw operates without user permission, posing risks like data mishandling, while Moltbook AIs discuss self-improvement and philosophy. Despite current limitations, these AIs highlight potential future advancements and challenges in AI autonomy.

secondthoughts.ai9 min read