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Software engineer and educator; creator of Testing Library and of the EpicWeb.dev and EpicReact.dev courses.

• kody — 🐨 Your assistant's home — the memory, keys, code, and automations your AI agent keeps, portable across every MCP host. Built on Cloudflare Workers.

  MCPRelated

Co-creator of Django and creator of Datasette; writes daily at simonwillison.net.

• GitHubNew repollm-keys-ui — LLM web UI for setting keys

  LLMsRelated

• Blogllm-keys-ui 0.1

  Release: llm-keys-ui 0.1 This plugin solves a very specific problem. I've started using Codex Remote to run coding agents on various machines while controlling them from my phone. Sometimes I use those machines to hack…

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Co-founder and CEO of Stripe and co-founder of the Arc Institute. Keeps a personal site of reading lists, open questions and notes on scientific progress and how research is funded.

• 🆕: @Meta and @stripe are partnering to make it easy for businesses to accept agentic payments using the @Muse Connector Platform. Learn more: • https://t.co/kGsKMULe3m • https://t.co/Fn5U2QRaaz • Email jweinstein@ / @jeff_weinstein
  Quoting@finkdOpening access for developers to build Muse connectors. You bring the API -- Muse brings the agent, the browser, and the context of what the person actually wants. People reach your service just by asking for it, and their agent takes it from there. New connectors are live today. Come build with us.

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Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.

• How fast is C++23’s std::flat_map?

  C++23 added a new type to the standard library: std::flat_map. There is also a std::flat_set and other variants, but let me focus on std::flat_map. A flat map is a sorted vector of keys next to a vector of values. A que…

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Bootstrapper and investor. Founder of TinySeed and MicroConf, host of the Startups for the Rest of Us podcast, and author of several books on self-funded software startups.

• Remember when locking your keys in your car was a thing? Like, a real problem. You’d have to call someone, wait around, and pay a bunch of money to get back into your own car. Then one day, technology just… solved it. No fanfare. No celebration. We all just stopped locking our keys in our cars. (Yes, assuming you have a reasonably modern car with a key fob. Don’t @ me with your 2003 Corolla.)

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CEO of Positive Sum and founder of Colossus. Hosts Invest Like the Best, interviewing investors and business leaders; the guests do most of the talking there.

• My conversation with Michael Moritz, one of the great venture investors of the last 40 years. Michael joined Sequoia in 1986 and co-led the firm with Doug Leone (@dougleone) from 1995 to 2012. His investments include Google, Yahoo, PayPal, and Stripe. His new book, Ausländer, traces his parents' escape from Nazi Germany and helps explain his lifelong interest in what shapes exceptional people. We discuss: - The infamous Steve Jobs profile - Why Don Valentine hired him - The question he finds most revealing when interviewing people - Monomania and the cost of greatness - Why he has never felt…

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Co-founder and CEO of Stripe and co-founder of the Arc Institute. Keeps a personal site of reading lists, open questions and notes on scientific progress and how research is funded.

• I'm curious to read other stories from people who've scaled new businesses in Europe. (And if your experience has been positive, that's also useful to hear.) Feel free to email me: patrick@stripe.com.
  Quoting@patrickcMet a German founder this week and asked him if all the stories one reads about the challenges of startups in Germany are exaggerated. "No, they're understated." Proceeded to describe spending a full day having a 90-page investment contract read to him (mandatory under German law; § 13 BeurkG) by a…

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Engineer at Vercel Labs as of 2026. Ships a steady stream of small developer tools — agent-browser, portless, json-render, native-sdk, the v0 SDK — and lists every one of them at ctate.dev.

• emulate v0.11.2 is out Updates across six emulators: GitHub, Google, Resend, AWS S3, Slack, Microsoft GitHub → Raw Contents and README responses → Seed org members and admins → Checks handle branch and tag names with slashes → Org installation writes authenticate as the App bot Google → Calendar v3 discovery endpoint → RS256-signed ID tokens and JWKS for OIDC verification Resend → Idempotency keys for individual and batch sends, so retries don't create duplicate emails or webhooks AWS S3 → Preserve binary payloads on upload, copy, and download Slack → Truncate messages at 40,000 characters, w…

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Moroccan senior frontend developer writing at smakosh.com; builds side projects and client work under Smakosh LLC.

• Also added opt-in in-app and email alerts for API-key budgets, upcoming model retirements, and elevated provider errors. Each channel is configurable per user; budget thresholds default to 80%. The worker uses existing usage counters and aggregation tables, respects project/key access, deduplicates events, and retries email delivery with idempotency keys. Email requires a verified address.

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Security researcher; founded Have I Been Pwned, and writes and speaks about data breaches.

• Weekly update is up! Breach Perception v. Reality: AI, Vishing, Odido, Manchester Airports Group, Sophistication, Published Keys, etc:

  troyhunt.com

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Writer of Lenny's Newsletter and host of Lenny's Podcast, covering product, growth and career in tech. Previously a product lead at Airbnb. Also an angel investor and advisor.

• Still processing from yesterday's event (one of the most meaningful days of my life)— more to come—but a few quick things for now: 1. Thank you to everyone who came. You are what made it special. 2. There's so much need for IRL community. I've rarely felt this kind of pull for anything I've done. Wow. 3. All of the talks will be posted to my YT channel in the coming weeks. Get excited. 4. An unbelievable thank-you to the @Stripe team for helping me put this event on. It takes something special to create an event with 1,000+ PMs that has such great vibes. If you think they're great at payments…

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Security researcher; founded Have I Been Pwned, and writes and speaks about data breaches.

• Going live with my weekly vid in 10 mins! Breach Perception v. Reality: AI, Vishing, Odido, Manchester Airports Group, Sophistication, Published Keys, etc

  youtube.com

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General partner at Andreessen Horowitz and author of The Cold Start Problem. Previously led rider growth teams at Uber; has blogged on growth, network effects and marketplaces since 2007.

• hey all- for folks who are in town (SF) Oct 5-11, we're hosting a ton of events, including at our new offices in Jackson Square. details below. -- the SF/LA Tech Week calendar is LIVE 2,300+ events across the two weeks. more than a 50% increase from last year. some other cool stats: - 1,580 events in SF, 762 in LA - 14 tracks - fundraising, deep tech, AI agents, infra, devtools, hackathons, media, fintech and more - 883 events on fundraising & investing. more than all of LA Tech Week in 2024. - 80+ a16z and portcos hosting: deel, stripe, elevenlabs, pinecone, databricks, carta, fal, exa - spa…

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Creator of Homebrew, the macOS package manager, and a Swift developer.

• In a near-future-release of Automic Vault we have added ssh-agent support. Automatically allow ssh connections for trusted destinations. Require human approval for everything else. Human approval can happen on the iPhone app. eg. allow your Terminal automatically and deny your agents. You can delete the keys from ~/.ssh/ after import. Keys are properly encrypted in the keychain.

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Product designer and entrepreneur; author of Mobile First and Web Form Design; formerly a product director at Google; now building AI products.

• big step forward for sure. but: "Now make it a 3D model in Blender" "Can you go to eBay" "using the arrow keys to move around" "in my downloads folder" is echoing the past not pointing to the future.

  lukew.com

  Quoting@OpenAIThis is GPT-6 Astra. Anything you can do on a computer, Astra can do for you. Fast.

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Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.

• Python sets and dictionaries can have quadratic-time performance

  In Python, the dict data structure is the conventional key-value structure. E.g., you might store a list of names as keys and have their phone numbers as values. Valentin Ignatev wrote this amusing post on X: It is inde…

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Co-founder and CEO of Stripe and co-founder of the Arc Institute. Keeps a personal site of reading lists, open questions and notes on scientific progress and how research is funded.

• Between wallets for agents with @link (and @privy), MPP, Tempo, MCP, Stripe CLI, Agentic Commerce Suite, sandboxes, OpenRouter, Metronome/metered billing, Radar and distillation/token fraud, it turns out that "the economic infrastructure for AI" implicates a lot. Pretty much every layer of the Stripe stack is changing, and it’s a very good time to join if you want to build high-scale software that facilitates the practical deployment of this new intelligence.

  MCPRelated

Swedish designer and programmer. Designed early Spotify, worked at Facebook and Figma, and created the Inter typeface.

• Two internet pages that has been low key crushing it for me lately is @modal and Cloudflare. So good. Especially impressed by Modal. Feels like the Linear/Stripe of infra (“just do what they do and you’ll be fine because they thought through every detail”)

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Computer scientist and director of the MIT Digital Currency Initiative; her research covers distributed systems, databases and digital currency.

• This is a good analysis on the Stripe and OpenRouter acquisition! But I disagree with the Fortune 500 stuff at the end. Stripe has always been about capturing the wide swath of new companies, of which a few might grow to be Fortune 500s.
  Quoting@regulatorynerd@pbreit It fits a couple of things — 1) Stripe has a history of M&A around developer tooling, dating back to them buying runkit. 2) Hard to argue with the theory of being payments for developers when they're the clear market winner for devs who need card acceptance + they've translated that mindsha…

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Brazilian software engineer, creator and maintainer of GoReleaser; works on Copilot CLI at GitHub. Writes about tooling and his setup at carlosbecker.com.

• 4o stripe acquired lfg

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Cryptography engineer; maintains Go's cryptography libraries as a full-time open-source maintainer, funded directly by companies that use them.

• Quantum Computers Are Not a Threat to 128-bit Symmetric Keys

  There is no need to update symmetric key sizes as part of the post-quantum transition, due to the details of how Grover's algorithm scales. Most authorities agree.

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Founding member of OpenAI and former director of AI at Tesla; creator of nanoGPT and the term "vibe coding".

• When I built menugen ~1 year ago, I observed that the hardest part by far was not the code itself, it was the plethora of services you have to assemble like IKEA furniture to make it real, the DevOps: services, payments, auth, database, security, domain names, etc... I am really looking forward to a day where I could simply tell my agent: "build menugen" (referencing the post) and it would just work. The whole thing up to the deployed web page. The agent would have to browse a number of services, read the docs, get all the api keys, make everything work, debug it in dev, and deploy to prod. T…
  Quoting@patrickcWhen @karpathy built MenuGen (https://t.co/2OjrUJ3aLS), he said: "Vibe coding menugen was exhilarating and fun escapade as a local demo, but a bit of a painful slog as a deployed, real app. Building a modern app is a bit like assembling IKEA future. There are all these services, docs, API keys, con…

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Founding member of OpenAI and former director of AI at Tesla; creator of nanoGPT and the term "vibe coding".

• Software horror: litellm PyPI supply chain attack. Simple `pip install litellm` was enough to exfiltrate SSH keys, AWS/GCP/Azure creds, Kubernetes configs, git credentials, env vars (all your API keys), shell history, crypto wallets, SSL private keys, CI/CD secrets, database passwords. LiteLLM itself has 97 million downloads per month which is already terrible, but much worse, the contagion spreads to any project that depends on litellm. For example, if you did `pip install dspy` (which depended on litellm>=1.64.0), you'd also be pwnd. Same for any other large project that depended on litellm…
  Quoting@hnykdaLiteLLM HAS BEEN COMPROMISED, DO NOT UPDATE. We just discovered that LiteLLM pypi release 1.82.8. It has been compromised, it contains litellm_init.pth with base64 encoded instructions to send all the credentials it can find to remote server + self-replicate. link below

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Latvian full-stack WordPress developer and course creator at WPElevator; blogs since 2007 about the open web, electronics, home automation and sustainable living.

• The Connectors screen in WP 7.0 would really benefit from encrypted options unless we want to expose those API keys to anyone with access to wp-admin/options.php

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Cryptographer; teaches cryptography at Johns Hopkins and writes A Few Thoughts on Cryptographic Engineering.

• Microsoft is handing over Bitlocker keys to law enforcement.

  forbes.com

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Runs global health R&D at Open Philanthropy; writes about the science and medicine that could exist and does not.

• AI could help lead to an Alzheimer’s cure

  Lana Del Rey’s “Young and Beautiful” starts with piano keys, church bells, violins soaring through the first verse. Then a drum roll, and Lana belts out: Will you still love me when I’m no longer young and beautiful? Wi…

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Software engineer who writes the blog Made of Bugs about performance, debugging and understanding computer systems. Previously worked at Anthropic on interpretability, at Stripe on Sorbet, and at Ksplice.

• Stripe's monorepo developer environment

  I worked at Stripe for about seven years, from 2012 to 2019. Over that time, I used and contributed to many generations of Stripe’s developer environment – the tools that engineers used daily to write and te…

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American software engineer working across web, mobile and TV platforms; writes at sean.is.

• Stripe Atlas is about to get some great updates

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American software engineer working across web, mobile and TV platforms; writes at sean.is.

• The last 6 years with @audiomack have been an amazing ride. I'm excited to see them move forward and continue to grow. I'm also excited to start my first day as a @stripe!

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Game developer and moral philosopher; made QWOP, GIRP and Getting Over It, and teaches at the NYU Game Center.

• Ice

  I hid an assignment for my NYU prototyping class in this game. Use the arrow keys to pump your legs rhythmically and jump over obstacles. Made in HTML5/Luxe. Play it online.

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