JOJO
哈哈，试试，正在使用gstack开发一个小工具，整体体验下来商业逻辑清晰很多
Xiao Tan: 同时体验了 @dontbesilent 商业诊断 skills和 YC CEO 的 gstack ，来诊断我的app的定位。
结论：
质疑力度，逻辑清晰度上，don哥的更狠一点。
gstack让我不得劲的一点在于，它有点朝着我的输入做妥协，被我的输入影响。don哥的skill是严厉且自洽的。
很有意思，大家可以去体验下。
It is indeed crazy! considering how many more startups have been funded, the fact that survival rates didn’t drop off a cliff is remarkable
Patrick OShaughnessy: A crazy image
Many such cases
Andres Trevino: I am working on a new project this weekend with Claude Code and of course the first thing I had to do was add gstack. @garrytan
Many such cases
vibe cooker: This project went from a mess of an idea to something that works all thanks to @garrytan ‘s gstack!
Many such cases
But you should get a good MacBook Pro
Jonathan: @karpathy autosearch and @garrytan GStack got me feeling like I’m building the empire on a MacBook Air.
This is what I’ve been open sourcing with gstack.
This is my CLI toolset. There are many like it but this one is mine.
Jeffrey Emanuel: It's also so powerful to take learnings from agent sessions where your custom CLI tools are used by agents and then feed them back into the skills the agents use to help them operate those tools.
This is sort of "in-context recursive self-improvement" if you will, cyborg style:
gabriel
start a company assuming:
1) models will become 10x better
2) the only bottleneck for humans is making as many well informed decisions as fast as possible in a great interface
lovable are so impressive, they understood this at gpt 3.5 and the same logic still holds
gabriel
Re 2) is not a model intelligence problem. there will be 10k+ new verticals for ai, and each individual vertical need a founders attention to build the right interfaces and sell to the right companies. labs can only do so many interface bets
Yuri Sagalov
This is actually amazing in a positive way. It means that despite more startups being founded and funded than ever before, success rates haven’t decreased.
It means that in absolute numbers we have way more successful startups than ever before.
Patrick OShaughnessy: A crazy image
Is Project Hail Mary appropriate for a 7 year old to watch?
Xiao Tan
Gstack continues to grow stronger!
I didn't expect my minor feedback to be taken so seriously. I'm truly grateful!
For small indie founders, it's like having a startup mentor, brings much more stability and certainty to your early-stage projects and keeps you grounded in business logic, rather than acting blindly on pure passion.
Huge thanks to Garry for open-sourcing such an amazing tool and bringing so much inspiration to the world!
Garry Tan: Chinese Twitter said that /office-hours in gstack was not hard enough on founders, so I made them harder
What is your preferred interface/process to switch between Claude and Codex?
Composer? Cursor? Terminal?
Tom Blomfield: Having Claude ask Codex for a second opinion when it gets stuck is mindblowing.
I watch along as they have a little a conversation and the bug is fixed.
I am firmly relegated to third place.
subagents in codex are very powerful
Diego | AI 🚀 - e/acc: Codex subagents game changer
Yeah we have an AI addiction and it’s awesome
Orange AI: 刚看完 Andrej Karpathy 的播客，他说他病了，得了严重的 AI 精神病。
他说从12月开始就没手写过一行代码了。每天对着 Agent 说话16小时，同时开十几个 Agent 并行跑任务，token 没花完就焦虑。他管这叫"AI精神病"。
他说 App 该消失了。智能家居不应该有六个 App，设备只需要暴露 API，Agent
Chris Arnade 🐢🐱🚌
Every transit nerd — the urbanist who tell us over and over how much they love public transportation— has to realize until you stop this sort of crap, and make stopping it your number one goal, you and all your train love are doing nothing but annoying everyone else.
Breaking911: Insane Chicago train rider swinging what looks like 2 hammers says he is going to kill white people, and adds that he got out two days ago.
GStack is useful for non-coders too. The beauty of open source: someone ported it to Claude web app skills
https://github.com/HruthikKommuru/CaludeSkills-Web-Gstack
Peter Yang
A designer who can ship code is one of the most valuable hires in tech today.
Here's my new episode with @felixleezd (CEO of @ADPList) where he showed me how to use Claude Code and Figma MCP to go from:
✅ Figma → Code: Design to website in 15 min
✅ Code → Figma: App back to editable design
Felix also demoed a few apps he's designed and built in Claude Code, including a 3D globe website and a landing page analyzer.
Some takeaways from Felix:
1. Stop pasting screenshots into Claude Code. Instead, use Figma MCP to pull in all your assets, icons, and images automatically.
2. You can use the same MCP to convert code back into editable Figma layers to explore more variations.
3. An underrated way to build: Use FigJam to plan a flowchart of your app first, then paste the link into Claude Code with the MCP.
📌 Watch now: https://youtu.be/ydiMKfljb-I
Thanks to our sponsors:
@Replit: Plan, design, and build with AI agents https://replit.com/?utm_source=creator&utm_medium=organic&utm_campaign=creator_program&utm_content=peteryang
@linear: The AI agent platform for modern teams http://linear.app/behind-the-craft
Many such cases
Chris Hammond: @garrytan Not a coder, just an immigration lawyer in Texas. Gstack has been very helpful building out a legal database and legal research tools (using agents, .md files and MCP tools) that I must say are already transforming how I work. http://Biaedge.com
i think it's great to have Claude or other coding agents listed as a developer on PRs—and i think this will get more common with OpenClaws that develop their own personality and perspective.
we also do this with writing @every, listing Claude and our Claws as co-writers:
GStack slowly climbing to level 7.1 or so on the 'autonomous software factory' - one plan mode and PR at a time
Every 📧
This week's Context Window: @cursor_ai bets on fast and cheap over frontier, teaching AI to write like you, and what happens when your vibe-coded app goes viral then crashes.
– @hammer_mt vibe checks Cursor's Composer 2 with @kieranklaassen—blazing fast, a fraction of the cost, but design quality and reasoning lag behind.
– @kplikethebird on how to build an AI style guide so models stop sounding like nobody.
– 🎧 @katelaurielee with @danshipper on editing AI writing and the moment AI tools clicked for her.
– @danshipper on what happens when your vibe-coded app goes viral and then goes down.
– @misssaxbys on why resumes are dead and knowledge workers need portfolios.
– @jackcheng hired an AI to handle his chores—now he maintains the AI.
– @Ashwinreads on the n-of-1 problem: A man used AI to design a cancer vaccine for his dying dog, and what it means for evidence-based medicine.
Weird realization: The best AI coding is in the morning when you are fresh from a night full of dreaming about latent space. Sleep early. Wake up early. The best ideas are in the morning.
It's not just about raw token maxxing. It is about teaching the machines the right abstraction that comes out of your own personal experience and the synthesis that comes from a good night's sleep.
Agarwal for Congress
80 seconds worth watching.
It’s infuriating.
@MishalHusain appropriately calls out the key flaw in the wealth tax:
the wealthy leave, and the middle class is left holding the bag.
He answers that the AI revolution won’t happen anywhere else???
1. He’s being trying to do everything he can to slow down AI progress
2. He hates the people building AI
3. He’s not dumb. He knows the AI revolution has nothing to do with the wealth tax, and he has no answer for the real question.
It’s his favorite strategy: criticize wealth to seem populist, lean on others innovation when helpful.
As if he’s done anything to spur innovation in the district.
Infuriating.
Bloomberg: "We need a modest wealth tax on these billions of dollars"
California Representative Ro Khanna tells Mishal Husain why taxing billionaires doesn't risk a Silicon Valley exodus
Subscribe to The Mishal Husain Show wherever you get your podcasts http://bloom.bg/4bAVWQF
Karri Saarinen
The way we did this at Linear was:
- no paid marketing or marketers or sales at all, focus on product and brand
- once product had organic growth and some level of PMF across the board target market start sales and marketing
- start testing out various paid channels
- keep scaling channels, invest more in video, brand etc
Idea is to develop the core and amplify it later with marketing and sales.
To me it always a waste to go too early in marketing. Your focus suffers, you have growth that you/product didn’t earn and you might get the wrong signals/customers
Deedy: Bill Gurley’s article doesn’t conclude “paid marketing bad”, just “be very careful”.
Big outcomes have clearly come from paid marketing: Monday, Grammarly, Squarespace.
He himself concludes that it “has a very important place in business… that requires.. thoroughness in its
some of the best career advice you’ll hear
Frank Y
Here is the list of 31 Claw variation from China. @steipete XD
http://x.com/i/article/2035755945507360768
Debora Allen
“80% of those arrested for crimes on BART hadn’t even paid their fare.” @GarryTan quoted it in his recent #transitcrime piece in @garryslist.
But where did that number come from?
It came from ME — after years of fighting the @SFBART execs and board over an awful rider experience. 🧵1/
codex hackathons have such great builder energy
Gabriel Chua: Congrats to the Top 5 Codex teams
Out of 200+, they cooked🧑🍳
From C++ firmware for brainwave readers to orchestrating fleets of coding agents from different providers.
One team took it further:
> “We’d be exploring HCMC & eating in cafes while Codex was just running beside
shirish
Palantir AI + Claude was used to detect, prioritize, and strike over 1,000 targets in the first 24 hours of Operation against IRAN.
The success was so ridiculous, so game-changing, that the Pentagon didn’t even wait.
What used to be just a pilot project, just something they were testing out… suddenly became official, permanent, and everywhere.
Palantir is now the core AI brain of the entire U.S. military. It’s getting rolled out across ALL branches.
unusual_whales: Pentagon to adopt Palantir AI as core US military system, per Reuters.
We are so unbelievably early with agents right now. The majority of companies aren’t even using coding agents at scale, let alone for the rest of knowledge work. We’re still mostly in the chatbot era of work for most of AI right now.
Diffusion of tech takes time, even in the most breakneck of markets, because there are major workflows that need to be reinvented, any regulated or large business has huge governance processes for deploying new tech or agents, data needs to get into well-organized environments, and there’s technical literacy that needs to be established. All things that get solved, but takes time nonetheless.
A point of comparison for technology diffusion: in 2010, a time by which every person in silicon valley knew that cloud was the future, AWS revenue was $500 million, Azure had only launched that year, and GCP was called Google App Engine. By 2025, these 3 platforms generated around $225 billion in revenue. And that’s only about 60% of the cloud market.
So from the moment the tech industry saw the future of cloud to today, the market is nearly 1,000 times bigger. And it’s still growing at an insane rate.
The same will happen for agents. Coding agents are like the early days of cloud computing when developers got on board for initial use cases. Then came the bigger workloads. This gives you a sense for how early we actually are in this transformation.
Rohan Varma: A couple of times a week, I find myself convincing a CTO to try coding agents. We’re very early.
Someone was telling me that it took over 10 years for most enterprises to adopt the cloud, and there are still holdouts.
We’re only 1 year into AI coding agents.
I do think coding
Justine Moore
Incredible clip on how @karpathy uses OpenClaw to run his house via texts.
You can ask agents to find connected hardware at your home (like Sonos speaker), and they'll search the network + hack in for you 🤯
You can control music, lights, HVAC, security...w/o writing any code.
Alex Volkov
Tix booked for @aiDotEngineer first Europe event! 🔥 Looking forward to meet new friends!
See you there @swyx @MilksandMatcha @osanseviero @badlogicgames @vincent_koc @Prince_Canuma @Whats_AI @tldraw @patrickdebois @WolframRvnwlf and tons of other amazing folks!
dax
you're probably underestimating how crazy things are
brexton
The @cognition team called their shot over two years ago before the market even had the terms for “tool-calling” and “harnesses”, and way before “sandboxes” and “dev workspaces” became the hot craze
The market finally caught up to their vision: fully async background agents
Ryan Carson: Paid $500 for @DevinAI - liking it so far.
You can tell this team is much further than other agent labs when it comes to being truly remote-first.
Very mature, advanced tooling and it just works across all surfaces (iPhone, Slack, Browser, GitHub, Linear).
I was tired of
Debora Allen
They tried to have me recalled in 2020, then spent hundreds of thousand of dollars to unelect me in 2020.
I won reelection that year by 64% of the vote in a three-way race.
Who's Voting for RFK: @debora_allen1 Kind of insane someone with common sense was even allowed to serve on the BART board.
Thank you for your work.
Antonio García Martínez (agm.eth)
It's funny watching all these consumer VCs doxxing how little they know about how even their own portcos achieved 'generational' scale.
The common thread: none of them have actually grown a consumer app, and they conflate spectatoring as an investor with actual experience.
Ok bro I have some news for you
Vikram Subbiah: First day in SF and already met Garry Tan at Chipotle on his birthday
Told him what I was building and the guy invited me for an interview
SF is truly the greatest city on Earth
The SF Standard is hiring. They have done a lot to bring a new voice to SF that is more common sense and I admire them for it.
https://jobs.sfstandard.com/p/11845b557433-open-call-for-tinkerers-hackers-and-community-leaders
RLHF bros should keep upvoting “hits different” in their evals, LLMs gotta really know that we humans love being told everything hits different, it is such incredible feedback that hits differently from everything else i have been differentially hit with
Damn @grok got an upgrade
Grok: @JohnTammiAnalyz @TTrimoreau One SaaS people genuinely love paying for is Linear. Teams swear by its blazing-fast issue tracking, keyboard shortcuts, and seamless collaboration—making the subscription feel like a steal for the productivity gains.
What about you?
It makes sense
secemp: btw codex is autism and claude is adhd
John Kennedy
If it's not obvious, all builders should be trying out gstack. It is great and fun, but also it describes a new way to imbue knowledge on others. @garrytan is codifying his builder knowledge into a process that executes elegantly inside @claudeai Code, turning Claude Code into an operating system.
Garry Tan: I'm getting closer to more and more automated smart decision making on the right kind of product/dev rails that I learned from Palantir, Posterous, and 100s of YC successful engineer-first startups.
Currently testing the newest idea: /autoplan which speeds through
baba
Windows users, we got CodexBar too now 🎚️
Claude Code + Codex usage tracking right from the taskbar.
Free, open source, zero config.
Peter Steinberger 🦞: CodexBar 🎚️ 0.18 is out:
- New providers: Kilo, Ollama, OpenRouter
- Codex historical pace + risk forecasting + backfill
- merged-menu Overview tab
- fewer Claude keychain prompt annoyances
- lower CPU/energy use, faster JSONL scanning
thx @RatulSarna 🙏 https://github.com/steipete/CodexBar/releases/tag/v0.18.0
If I have a bunch of local projects in Claude Code do I need to turn on remote control for each one to be able to prompt it from my phone?
Wish it would just work instead as long as I have my computer on.
Believe it or not I came up with it while using /office-hours on building /office-hours in GStack
Kevin Rose: possibly the sharpest VC marketing move I've seen... @garrytan ships 15 claude code skills, the repo hits 37k stars and 4.6k forks, then -- only after delivering real value - drops the pitch, bravo 👏:
Companies (generally) need capital to grow.
But every founder's relationship to this capital is quite varied.
Some founders need money to feel secure.
And for others, you realize that the company is going to get built whether or not the capital comes along.
As an investor, you can choose to be along for the ride.....or not. It doesn't matter.
One special callout here: the founder who wants to plan out every detail of how to use their seed capital. This is insane. In this day and age of AI, you just need to use your capital as (smartly) aggressively as possible.
kitze 🛠️ tinkerer.club
ppl think i switched to codex now lol
i switched to codex around august-september idk when it was released and i've been using it since, you are just very late
i tried slopus a bit for ui here and there, then a bit of komposer 1 for a week, but i'm mostly a codexboi
it feels like talking to a serious adult and coding with a senior, not with a golden retriever
Rithvik Chuppala
Re @alexfmac YC is probably gonna have a pretty large concentration of winners in the coming years. the sheer # of YC-backed AI-natives that are at/near unicorn rn is already huge.
Hope Dealer
Re @garrytan Building the thing that builds the thing.
I feel my main velocity limitation lately isn't token speed anymore, it's compute. Running tests in parallel is taxing; can't wait for better cloud worker integration.
OK fine
EloPhanto: @garrytan the real attack surface isn't your code — it's your dependencies. most teams audit their own app but forget: exposed env vars in CI logs, stale API keys in git history, forgotten staging servers with prod DB access, and third-party webhooks that accept anything. an automated CSO
GStack is only 10% power of what it's like to actually come and go through a Y Combinator batch
Rohan: gstack taught me more about clarity in software than any mentor I ever had.
Wish @garrytan was my mentor :)
Thanks for putting this together.
Anyone starting - just read this - and then try gstack
https://garryslist.org/posts/boil-the-ocean
Vivian Midha Shen
perfect day for an alumni demo day at YC
Y Combinator
Alumni Demo Day
today was a good day
Code is an output. Nature is healing.
For too long we treated code as input. We glorified it, hand-formatted it, prettified it, obsessed over it.
We built sophisticated GUIs to write it in: IDEs. We syntax-highlit, tree-sat, mini-mapped the code. Keyboard triggers, inline autocompletes, ghost text. “What color scheme is that?”
We stayed up debating the ideal length of APIs and function bodies. Is this API going to look nice enough for another human to read?
We’re now turning our attention to the true inputs. Requirements, specs, feedback, design inspiration. Crucially: production inputs. Our coding agents need to understand how your users are experiencing your application, what errors they’re running into, and turn *that* into code.
We will inevitably glorify code less, as well as coders. The best engineers I’ve worked with always saw code as a means to an end anyway. An output that’s bound to soon be transformed again.
Matt Mullenweg
Happy birthday to @garrytan ! You're on a generational run right now. :)
Kevin Rose: possibly the sharpest VC marketing move I've seen... @garrytan ships 15 claude code skills, the repo hits 37k stars and 4.6k forks, then -- only after delivering real value - drops the pitch, bravo 👏:
Jed White 💥♻️
YC's Alum network is one of the best bits of YC.
Somehow, there are a bunch of YC and Garry haters who totally miss that the YC partners are just founders too.
Many successful alum go on to help others by becoming angel investors and YC partners and VCs. But it is just one version of the pattern.
YC is all about founders helping other founders.
Y Combinator: Alumni Demo Day
today was a good day
Ben Kamens
currently in my pirate mode, but beware I’m a switch
Dan Shipper 📧: new model for engineering team structure in 2026:
2 people only
one pirate and one architect
the pirate's job is to move as fast as possible to develop valuable, shipped product features by vibe coding.
the architect's job is to turn the product surface discovered by the
Chris K
Yarr
Dan Shipper 📧: new model for engineering team structure in 2026:
2 people only
one pirate and one architect
the pirate's job is to move as fast as possible to develop valuable, shipped product features by vibe coding.
the architect's job is to turn the product surface discovered by the
Mario Zechner
Re @micLivs it's funny, because one of the reasons i wrote pi is to get rid of those system reminders that CC injected behind my back. full circle :D
Jayme Hoffman
The level of traction in this @ycombinator batch is insane
Thanks Gus
Gus: @garrytan Garry, if you are rewriting the /cso skill, the current v1 has blind spots worth knowing about. It runs Ruby, Java, PHP, C# patterns on every project without detecting the stack first. Uses raw grep in Bash instead of Claude Code's Grep tool. | head -20 on every grep means a
yuj
Back at @ycombinator again for alumni demo day. Debunking a few recent takes on yc companies:
- 4m at 40m is not the norm. Most people I talked to are doing 30m or 25m cap
- yc companies don’t sell to each other to bump up traction. Only a minority of companies even sell within yc
- no one is actually doing open-claw clones
Interesting bits:
- there’s one nonprofit co at the demo day
- a few companies are already profitable (!)
- there are more e hardware demo booths than from my batch
Eric Litman
🏴☠️
Dan Shipper 📧: new model for engineering team structure in 2026:
2 people only
one pirate and one architect
the pirate's job is to move as fast as possible to develop valuable, shipped product features by vibe coding.
the architect's job is to turn the product surface discovered by the