What Builders Are Saying Today

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Daily Recap

Tuesday, September 15, 2026

Boris Cherny on what's top of mind: Fable solved the Cyphral Distich (a 370 year old cypher). Super cool way to use Claude

Peter Steinberger: Next release (or dev channel) does worktrees ~80% faster via apfs/brtfs/xfs/ReFS folder clones. Also saves lots of disk space.

Matt Turck: Seed investor when a company he forgot about years ago gets acquired out of nowhere

Garry Tan: The content about startups we do is merely the teaser for the specific advice we give 1:1 when you actually are a YC startup

Today's featured podcast: No PriorsRedefining Chip Architecture with Arm CEO Rene Haas

12 builders 1 podcast

Builder Updates

12 people
Boris Cherny

Boris Cherny

@bcherny

Claude Code @anthropicai

Fable solved the Cyphral Distich (a 370 year old cypher). Super cool way to use Claude https://t.co/0fgTdITSfO

1.9k
86
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Peter Yang

Peter Yang

@petergyang

Practical AI tutorials and interviews for busy people | Get my best AI skills and guides at https://t.co/6VAA6p81x6

I'm really curious who's actually managing this account https://t.co/BWu6Imtxuy

Nan Yu

Nan Yu

@thenanyu

(soon) member of product staff @openai. prev head of product @linear. I am grader.

37 signals would have called the the Nuse Feed https://t.co/RigssbRcMo

Madhu Guru

Madhu Guru

@realmadhuguru

Sr Director, AI at Meta; Prev: Google - Led Gemini, Veo, Nano Banana.

Stud traders like Kaushik love Muse! https://t.co/UPhEaGi5g6

Amjad Masad

Amjad Masad

@amasad

ceo @replit. civilizationist

Nominal determinism strikes again. https://t.co/rFD1V1y2D9

Guillermo Rauch

Guillermo Rauch

@rauchg

@vercel CEO

You don't get it, I build software to relax

2.5k
213
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Aaron Levie

Aaron Levie

@levie

ceo @box - your business lives in content. unleash it with AI

“Pacing” can be somewhat of a trigger word because it sounds like an arbitrary slow down of capability or a way to hobble competitors through undue regulation. However, the specific improvement goals laid out in Dario’s are absolute necessities in AI development. We expect equivalent in areas like aerospace, life sciences, health care, and other industries, and AI development likely shouldn’t be that different. AI is going to be the technology underpinning our financial trading systems, our medical devices, our biotech breakthroughs, defense systems, government workflows, and many more mission critical domains. So it completely stands to reason that we want these systems to be safe and “aligned”. How we get there -without meaningfully slowing down innovation progress or reducing competition- is one of the most complex questions in the 21st century, but the need is clearly real.

Garry Tan

Garry Tan

@garrytan

President & CEO @ycombinator —Founder @garryslist—Creator of GStack & GBrain—designer/engineer who helps founders—SF Dem accelerating the boom loop

The content about startups we do is merely the teaser for the specific advice we give 1:1 when you actually are a YC startup https://t.co/MZ2tMlxLzJ

Matt Turck

Matt Turck

@mattturck

VC at @FirstMarkCap. Host: MAD Podcast; Organizer: Data Driven NYC, Author: MAD Landscape.

Seed investor when a company he forgot about years ago gets acquired out of nowhere https://t.co/X6NWlHRNle

Zara Zhang

Zara Zhang

@zarazhangrui

Builder. Make something people want, then make people want it. Harvard’17. GitHub: https://t.co/KCuEaje1wd YouTube: https://t.co/8xzbGWsHgY

Anyone else notices this problem with Astra? Astra: I have done X Me: This is wrong, you should do Y instead Astra: You're right. I should do Y Me: ... Why doesn't it just go and do Y, like the other models??

Nikunj Kothari

Nikunj Kothari

@nikunj

partner @fpvventures - investing in seed/A. previous: early hire @meter, @opendoor, @atlassian & others. love @shimoleejhaveri + 👦👧

All the questions to ask when you’re joining a startup https://t.co/m3c5GRQ7kI

Peter Steinberger

Peter Steinberger

@steipete

Polyagentmorous ClawFather. Came back from retirement to mess with AI and help a lobster take over the world. @OpenClaw🦞 + @OpenAI

And yes, I'll test this for a few weeks and if we see that this helps the majority of users I'll try to get this into codex!

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