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Kun Chen
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kun — Think and build like a principal engineer. Leverage Kun's experience, knowledge, tools, workflows, and skills to help you get shit done.
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20 September
Founded PSPDFKit in 2011 and ran it for a decade. Came back from a break to work on AI agents — the OpenClaw project, and OpenAI, joined in February 2026. Writes at steipete.me.
14 September
Former L8 engineer at Meta, Microsoft and Atlassian, now writing and building solo on agentic engineering. Writes Kun's Field Notes and posts a lot about AI coding agents on X.
sharing an emotional milestone plus some tips for growing a social media presence if you came across my youtube channel, you might have seen i always had “ex-meta” or “L8 principal” mentioned in the title of my videos i hated doing it, and every time i published a video i always a/b tested removing that title unfortunately, every single time, removing it would destroy the reach and the videos simply wouldn’t be seen nearly as much the latest video was the first one i ever had where the “ex-Meta L8” title no longer made any difference. and i have now picked the variant that’s just “with Kun” i… Related
12 September
Former L8 engineer at Meta, Microsoft and Atlassian, now writing and building solo on agentic engineering. Writes Kun's Field Notes and posts a lot about AI coding agents on X.
github actions in my oss repos suddenly stopped running today i had opus 4.8 look into it, it spent ~$10 worth of tokens and insisted that either i haven't paid my bills or there's a github outage switched to grok 4.5 and just 3 minutes in with $1.2 worth of tokens, it found there's a surge of CI runs in my firstmate repos starving all the allowed runners across my account, cancelled a bunch of them, and everything's back on track this is just an anecdotal example but i've had many positive experiences like this. people ask me why i default to grok and this is why Related
2 September
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.
Their words
We use Portless in our largest monorepo Highly recommend it if you work with worktrees, parallel agents or multi-app repos
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x.com
22 August
AI research engineer working on large language models. He writes the Ahead of AI newsletter and is the author of Build a Large Language Model (From Scratch).
A couple of days ago, I did a quick explainer on Claude’s new watermarking process and implementation. Since it’s such a popular topic and sparked such a lively discussion, I thought it might be interesting to go into a bit more detail when explaining how it works. So, instead of the usual text article, I recorded a little lecture on the topic (to change it up a bit from my usual articles). It ended up a bit longer than intended, but I hope it clarifies a lot of things: - Sampling the next token in an LLM and pseudorandom number generators - How watermarking relates to the regular LLM samplin… LLMs Anthropic Related
27 June
AI research engineer working on large language models. He writes the Ahead of AI newsletter and is the author of Build a Large Language Model (From Scratch).
26 May
General partner at Andreessen Horowitz from 2013 to 2018 and CTO of Coinbase from 2018 to 2019; co-founder of Counsyl and Earn.com. Wrote The Network State (2022), free in full at thenetworkstate.com, and founded the Network School.
13 May
Indian value investor who taught Behavioural Finance and Business Valuation as an adjunct professor at MDI Gurgaon. He writes the Fundoo Professor blog about investing, moats and mental models.
📌 SEBI EoDI Disclosure (effective 1 May 2026) I am Founder & Principal of ValueQuest Capital LLP: — SEBI Registered Investment Adviser: INA100002032 (valid till 26 July 2029) — Category III AIF Manager: IN/AIF3/25-26/1988 — BASL Membership No. 1532 All posts on this handle are personal and educational. Nothing here is investment advice or a solicitation to buy/sell any security. Full disclosures: valuequestcapital.com
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7 May
Software engineer; co-founder and former CTO of Tailscale, previously on the Go team at Google.
From one piece
The agent principal-agent problem
2 beliefs, in the piece's order there
24 April
Novelist and critic, author of The Body Scout and Metallic Realms; writes the newsletter Counter Craft on fiction craft and the publishing industry.
2 April
Founding member of OpenAI and former director of AI at Tesla; creator of nanoGPT and the term "vibe coding".
LLM Knowledge Bases Something I'm finding very useful recently: using LLMs to build personal knowledge bases for various topics of research interest. In this way, a large fraction of my recent token throughput is going less into manipulating code, and more into manipulating knowledge (stored as markdown and images). The latest LLMs are quite good at it. So: Data ingest: I index source documents (articles, papers, repos, datasets, images, etc.) into a raw/ directory, then I use an LLM to incrementally "compile" a wiki, which is just a collection of .md files in a directory structure. The wiki… LLMs Related
20 March
Founding member of OpenAI and former director of AI at Tesla; creator of nanoGPT and the term "vibe coding".
Their words
But okay, they shouldn't actually be enacting these ideas. There is a queue of ideas and there's maybe an automated scientist that comes up with ideas based on all the archive papers and GitHub repos and it funnels ideas in or researchers can contribute ideas, but it's a single queue and there is workers that pull items and they try them out.
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youtube.com
15 March
Indian software engineer working on Android and React; writes about his setup and side projects at ishubhamsingh.dev.
19 October 2025
Member of technical staff at Anthropic. He has led ML/AI teams at Amazon, Alibaba and Lazada, and writes about LLMs, recommender systems and engineering at eugeneyan.com.
Their words
To get to principal, you need to put yourself on the critical path. To be effective as a principal and go beyond it, you need to actively remove yourself from it.
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eugeneyan.com
Member of technical staff at Anthropic. He has led ML/AI teams at Amazon, Alibaba and Lazada, and writes about LLMs, recommender systems and engineering at eugeneyan.com.
20 August 2025
American open-source program lead working on WordPress; a WordPress core contributor and release lead who writes at jeffpaul.com.
18 March 2025
Full-stack Laravel developer based in Madison, Wisconsin; maintains open-source Laravel, Livewire and Alpine.js packages and writes at randallwilk.dev.
13 January 2025
Writer and education-technology critic; published Hack Education for a decade and wrote Teaching Machines.
17 November 2023
Political scientist at the University of Chicago and the leading exponent of offensive realism; wrote The Tragedy of Great Power Politics.
Their words
And of course, what they were negotiating about was NATO expansion into Ukraine, which was the principal cause of the war. People in the West don't want to hear that argument because if it is true, which it is, then the West is principally responsible for this bloodbath that's now taking place.
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youtube.com
15 June 2022
Writer and education-technology critic; published Hack Education for a decade and wrote Teaching Machines.
3 September 2020
Founder of Pinboard; writes Idle Words — talks and essays on the web, aviation, politics and travel.
Effective Political Giving With less than two months left before the election, this is an explainer for the politically panicked. You're anxious, you feel the need to do something, and you have a little money to spare. Who should you give it to?…
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17 July 2020
Programmer known online as technomancy; author of Leiningen, the Clojure build tool, and a maintainer of the Fennel programming language.
3 January 2020
Writer and education-technology critic; published Hack Education for a decade and wrote Teaching Machines.
12 May 2014
Software developer; created Firebug, helped create Firefox on the Netscape browser team, and built the original Facebook iPhone app.
8 December 2011
Software developer; created Firebug, helped create Firefox on the Netscape browser team, and built the original Facebook iPhone app.
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A korrent is a belief a person has stated in their own words: one
sentence stating the claim, backed by a quote and a source, kept at
korrents.com .
Under a name here, the quoted block is what they actually said.
The korrent beneath it is the claim those words support, in
korrents' wording — tap it to see the record, its source, and who
else holds it.
Nobody here wrote their own korrents. They are compiled from public
statements, and a person can change their mind, which is recorded too.
Got it
About the English under a post
Some people here publish in a language other than English. Where they
do, this site shows a machine translation beneath the post, in
this typeface — the site's own, not theirs.
The post itself is never changed, moved or hidden: what is set in the
serif above is exactly what the person published, and it is what to
quote them on. A translation can be wrong in ways that matter,
especially about tone.
Only the post's own words are translated. A quoted post, a linked
article and a belief on korrents.com
are left in their original language.
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