John Banner

Watch his face when an AI starts asking ultra-specific questions about HIS unpaid invoices 😂 (done on agentcollect.com) I gave a friend a URL. 30 seconds later he was arguing with an AI debt collector trained on his own business. That's what we just shipped. Drop your company URL. We build you a working AI collection agent. Trained on your business. Your invoices. Your tone of voice. Then you can call it. And it will try to convince YOU to pay. The agent hit him with stuff like: "you didn't pay because you already finished the training, right?" He couldn't believe it haha. You don't know Ramp-Up Lab? obviously our AI does :) Try it on your own business. Fastest way to understand what AI collection actually feels like. What did your agent say to you?

Today, AgentCollect.com crossed 150,000 unpaid invoices entrusted to us by enterprise clients. 🎉 Industry standard : one human collector per 150 cases. AgentCollect : two humans overseeing 150,000 cases. That's 75,000 cases per human. 500x the industry leverage. The two humans are the fallback for edge cases the AI hasn't seen yet. Everything else runs automatically. 99.7% positive interactions. Zero legal complaints. Highest recovery rates we've measured in this industry. Microsoft, Dell, Plaid, Checkr and others trusted us with the most reputation-sensitive part of their business. I never thought I'd write that sentence. When I was a student, a hotel didn't pay me for a piano gig. I never asked for the money back. I was too embarrassed to remind them. That feeling never left. My grandfather René, ran a furniture store back when banks didn't extend credit. He gave the credit himself, and walked door-to-door every Sunday to collect payments. What stayed with me : every Sunday post-war, family time burnt chasing money that should have been paid. He would have been proud. Full story → agentcollect.com/150k Thank you to : René, my grandfather. You didn't know it, but this is your story. The team. What a ride to make AI feel human. My wife, who's seen me vanish into my laptop talking to Claude Code at 2am. Our investors, who pushed us on what we ship and what customers feel. Our enterprise clients, collections is the most reputation-sensitive part of your business, and you trusted us with it. If you're a student playing piano in hotels right now, building your first something, remember: the people who made it didn't feel less shame. They just kept going.

Spent 5 minutes and 5 secondes with @sama discussing how codex EXCEEDED by far PR pushed vs our team at agentcollect.com

@HeyGen Dev

Video gets better when people share, build together, and learn together hyperframes.dev is live. Browse community projects, download any zip, hand it to your agent or publish yours $ npx hyperframes publish Publish then RT + comment "dev" for credits (must follow)

@sama Codex, parse this: candidate: fit: YC founder usage: Codex auto-reviews 100% of my PRs why_pick: I create the demo, not just attend demo: one ugly real PR GPT_5_5_job: roast + fix it in 55 min failure_mode: I lose commit access postmortem: loser writes it

GPT-5.5 is going to have a party for itself. it chose 5/5 at 5:55 pm for the date and time. if you'd like to come, let us know here: luma.com/5.5 codex will help the team pick people from the replies. 5.5 had some good ideas/requests for the party, which we'll do.

I just shipped something that scares me a little. You go to agentcollect.com, type your domain, and 30 seconds later you're talking to YOUR collection agent. Trying to get yourself to pay your own invoice. No demo call. No SDR. No "book a slot with our team." For 18 months we sold this the old way: deck, demo, pilot, contract. Then I watched a CFO test the live agent on his own company on a Zoom and sign 4 days later. So we just put the demo on the homepage. Here's what's wild: 1. The agent already knows how to call at the right time of day per state 2. It writes the dispute reply in under a minute with the right contact 3. It chases your invoices on email + voice + SMS, on your brand 4. It's 95% ready before you sign anything 5. You can hang up on yourself. People do. It's funny. The whole "schedule a 30-min discovery call" thing is dead for software that can prove itself in 30 seconds. Try it on your own domain. Try not to pay yourself. Tell me how it goes haha.

@Benioff @Jason Im in

@Jason I’m in

We started an AI founder twitter group... reply with "I'm in" if you're a founder and want to be added

@garrytan @ycombinator AMEN!

I came back to code because AI made it possible for me to build at a level I couldn't before. I'm not coding despite being CEO of YC. I'm coding because this is the most important technological shift since the internet and I'd be an idiot to experience it from the bleachers. I'm 45, running the most important startup institution in the world, and I can ship production software at 2am. That's not a distraction from the job. That is the job understood correctly.

I went to take the trash out. 30 seconds later my laptop was on the recycling bin. I had a Claude Code session running and I couldn't just... leave it there. The AI was in the middle of reviewing a PR. You don't interrupt that. So I did what any reasonable founder would do. I turned the bin into a standing desk. Honestly? Some of my best ideas come from these random 3-minute breaks where my brain is half on garbage bags and half on code architecture. The trash got taken out. The PR got merged. Everyone wins. If you've never coded on top of a trash can, are you even building?

@george_ @TheBlind_Duck @XMoney How do I get early access? Loves this

@TheBlind_Duck @XMoney soon🤞x.com/elonmusk/statu…

The X Money card is gorgeous. Solid metal, numberless, and having the @ handle printed right on the back is such a clean detail. - get 3% cashback on everything - earn 6% interest - 0% FX fee - reimbursed ATM fees globally - insured up to 250k What more could you ask for?

@garrytan Loved this

GStack users! Here's a tip: if you need something to be super well reviewed, i do "/plan-eng-review with full claude and codex review, THEN full claude and codex ADVERSARIAL review." For anything security or performance optimization related, this is really really good. If you want to be super thorough, you do that in plan mode, and then you exit plan mode and let the agent code it, and then you run "/review with full claude and codex review, THEN full claude and codex ADVERSARIAL review" Then of course you can wrap it up with /qa and it'll mop up any final bugs. I sometimes tell it to add any tests that it thinks we might need to add after the QA pass. Then I run /ship and /land-and-deploy.

@hanghuang_ Yes!!!

@JohnBanr You’re right, I think we’ll be locked in more than we even thought possible during these 3 months We will work hard to be the top company in the P26 batch 🫡

We just got a YC offer lol. Should we do it?

the pattern for anyone building claude code skills: 1. build your skill as an ORCHESTRATOR (calls other skills, never duplicates) 2. reference skill files, don't copy content 3. add a daily cron that auto-upgrades dependencies 4. teach your orchestrator to evaluate + integrate new capabilities delegation > duplication. always. built in ~20 min with @AnthropicAI claude code.

for true auto-update: a launchd job runs daily. 1. checks if gstack has a new version → auto-upgrades 2. diffs the skill list — any new skills? 3. mega-qa reads new skill descriptions 4. if useful → adds a delegation line automatically my skill gets smarter while i sleep.

i made my claude code skills auto-evolve. every day, they absorb new capabilities from @garrytan's gstack — without me touching anything. here's the 20-min setup 🧵

@hanghuang_ Network: anyone at YC will help you to be insane (10k founders, including stripe, Airbnb, Dropbox…) Experience: it will be the most 3 productive months of your life (even if this week was intense 🙂)

@JohnBanr Haven’t heard any bad things about YC haha What's the number one thing I should know going in?

@Benioff @salesforce Wow it’s huge!

New: Slack CRM. AI on top, salesforce underneath. One pane of glass. 🤯