Daily Brief

Laurie Voss reran a year old benchmark and the models walked straight through its ceiling without noticing it was there. IFScale asks a model to write a business report containing a list of exact words, then counts how many actually appear. A year ago frontier models started dropping instructions somewhere around 200 to 300, which is a hard limit on how much you can put in a skills file. Voss, head of developer relations at Arize AI and a cofounder of npm, first replicated that result on the three models from the original paper still reachable by API, then pointed the same test at the current

Adding a nice interface made the product worse. With plain text results the model would run ten or fifteen job searches, filter them, and assemble a table. Once a rendering widget was attached, it called the tool once, saw results already on screen, and stopped exploring. Dustin Mihalik is a technical fellow at Indeed working on AI platform and guardrails, and this is a lessons from the trenches account of building MCP apps for Claude, ChatGPT, and Indeed's own job seeker agent. He starts with why a UI is worth having. A text response carries no branding, and getting a host chat app to link ou

Alex Hancock built one of the clients in this talk the night before he gave it, which is roughly the point. Hancock is a software engineer at Block, works on the open source agent harness Goose, now donated to the Linux Foundation, and maintains the Rust SDK for MCP. His argument is that the agentic stack already has a good standard for agents reaching outward to do things, which is MCP, and that the strongest thing about MCP is not its design but the fact that everyone uses it. What is missing is the other direction, a standard way for client software to tell a harness what to work on and to

Full episode: https://youtu.be/X50zezLFWWI Me on twitter: https://x.com/dwarkesh_sp

Why porting a massive codebase from Python to TypeScript was the right move. Mike Krieger, co-lead of Anthropic and founder of Instagram, breaks down the unconventional engineering decision behind this switch. He details how integrating Bun and a new deployment strategy justified the migration despite the scale of the project. Subscribe for more deep dives into complex engineering choices.

The instruction Impeccable loads when you type "bolder" ends with a challenge: show someone your work, say AI made this bolder, and if they believe you, you failed. Bakaus has built tools for more than twenty years. Impeccable is a design skill that rides on top of a coding harness rather than replacing it, working across Claude Code, Copilot, Cursor, and Codex. He opens by running the same prompt on the same bland page twice, with the skill and without, and lets the room judge. His observation is that the tells of generated design keep moving. The purple gradients are gone from frontier model

Taste Labs analyzed more than two million websites going back a decade, and the finding that complicates the usual story is that the internet was homogenizing before AI arrived: palettes converging, layouts converging, trends spreading faster than they once did. AI did not start the collapse. It accelerated it and made it context blind, so a pet shop and a finance firm end up with the same page. Thais Castello Branco founded Taste Labs, out of stealth weeks before this talk, to attack that. She names three signatures of slop: repetition, lack of fit, and low intent. She is careful about the wo

Because only the agent can reach an MCP server, a naive file upload tool makes the agent retype the file into the server character by character. Jeremiah Lowin calls it the world's most expensive copy paste operation, and it is the problem MCP apps exist to remove. Lowin is founder and CEO of Prefect and the author of FastMCP. MCP apps, a protocol extension added this year, let a tool result skip the agent and arrive at the user as HTML, CSS, and JavaScript: a real interface a person can click. That solves one problem and creates another, because FastMCP's users are overwhelmingly Python engin

Vincent Wendy pointed an agent at the sponsor banner in the lobby, a wall carrying more than 140 logos, and asked it which ones were missing. It caught every omission in the checks he ran, and he used the same trick on the conference shirt. Wendy is the senior creative designer at AI Engineer, a company of roughly twelve to fifteen people, and he is its only designer. The conference he designs for grew to 7,000 attendees, more than 140 sponsors, more than 300 speakers, and more than 600 sessions, and all of it needs something drawn: stickers, signage, landing pages, wayfinding. A thousand deta

本篇为神奇组织之1977纽约大停电。

法律虽然无法强迫夫妻之间的彼此尊重，但是必须要捍卫底线的道德。

教师节，祝老师们节日快乐，也感谢那些给我托举，给我祝福，给我无私帮助的师长。