Jason Liu
Machine learning engineer and consultant focused on RAG and retrieval systems. He writes about applied AI engineering at jxnl.co and is the author of the instructor library.
Jason Liu did not write this page. ppll compiled it from their own words, each linked to the source. Is this you? · Report a mistake
Latest x.com
What they believe
-
AI has made ability nearly free, making taste the main bottleneck separating good creators from mediocre ones.
As AI has allowed more and more people to create things, the biggest differentiation, the biggest skill people are lacking, is taste itself.
jxnl.coSaid 5 Jul 2026This on korrents
-
Good automation design starts from whether context must persist between runs, not from building a complex system.
The best automations do not start with a complicated system. They start with knowing whether the next run needs a clean slate or the same thread.
jxnl.coSaid 28 Jun 2026This on korrents
The bold line is korrents’ wording; the quote is theirs. These 2: what they wrote before what they said aloud, one per source, newest first.
Feed
As its own page →Hiding
16 October
15 October
14 October
13 October
11 October
10 October
8 October
2 October
11 September
29 July
14 July
5 July
From one piece If You Want Taste, You're Gonna Have to Eat 3 beliefs · jxnl.co
-
korrents.com
Taste is not about consensus or criticism, but the courage to value what genuinely resonates with you.Their words
Taste isn't consensus. It's not judgment first, either. It's easy to be a critic. Curiosity has to come first, because without curiosity you never broaden your horizons.
-
korrents.com
AI can hand you the end result of a skill without the attentive practice that used to build it.Their words
It gives you the destination without the hours of noticing that used to get you there.
-
korrents.com
AI has made ability nearly free, making taste the main bottleneck separating good creators from mediocre ones.Their words
As AI has allowed more and more people to create things, the biggest differentiation, the biggest skill people are lacking, is taste itself.
28 June
-
korrents.com
Good automation design starts from whether context must persist between runs, not from building a complex system.Their words
The best automations do not start with a complicated system. They start with knowing whether the next run needs a clean slate or the same thread.
22 June
16 June
18 May
From one piece Six levels of complexity in a Codex morning brief 2 beliefs · jxnl.co
-
korrents.com
A recurring AI workflow improves more through ongoing user feedback than by being fully specified upfront.Their words
This is why I like the thread version more than a generic scheduled report. The brief improves as you complain about it.
-
korrents.com
AI agents should draft work on a person's behalf but never send or act as if they were that person.Their words
Level 5 teaches the trust boundary I actually care about: draft the work, do not impersonate me.
10 May
From one piece Codex-maxxing 2 beliefs · jxnl.co
-
Their words
Files force the agent to compress experience into a form that can survive the thread.
-
Their words
Execution is only as good as the goal and the verification you give it. Ambition without verification is just a wish.
13 April
12 April
2 April
2 February
24 January
-
Their words
One good Yohji piece annihilates three seasons of hype drops.
-
Usesaffiliate linkrcmnd.app
Purple MattressTheir words
I've always stuck with Purple Mattress
-
Lovedaffiliate linkrcmnd.app
Manta Sleep eye maskTheir words
For travel, Manta Sleep eye mask — they have hot and cold versions which I love.
-
Likedaffiliate linkrcmnd.app
CeraVe Ultra-Light GelTheir words
lightweight moisturizer with ceramides and hyaluronic acid. After a week, I received compliments on my skin.
+ 11 more
-
Lovedaffiliate linkrcmnd.app
Harman Kardon Aura Studio 3Their words
the single best speaker I've ever owned, perfect for hosting parties.
-
Usesaffiliate linkrcmnd.app
Herman Miller EmbodyTheir words
Herman Miller Embody chair and Kinesis Advantage 360 keyboard.
-
Usesaffiliate linkrcmnd.app
Kinesis Advantage 360Their words
Herman Miller Embody chair and Kinesis Advantage 360 keyboard.
-
Lovedaffiliate linkrcmnd.app
Philips HueTheir words
Philips Hue lights and Noguchi lamps — pricey but I love them.
-
Usesaffiliate linkrcmnd.app
Rimowa luggageTheir words
Rimowa luggage with Amazon packing cubes
-
Lovedaffiliate linkrcmnd.app
Wyatt harness bootsTheir words
I've worn my Wyatt harness boots for years and they're still pristine.
-
Lovedaffiliate linkrcmnd.app
Yohji YamamotoTheir words
My favorite brand is Yohji Yamamoto
-
Likedaffiliate linkrcmnd.app
Extreme CashmereTheir words
Extreme Cashmere — Dutch brand making oversized, genderless cashmere knits. Their pieces are numbered instead of named.
-
Likedaffiliate linkrcmnd.app
Milbon Curl MousseTheir words
Milbon Curl Mousse keeps curls hydrated and defined.
-
Usesaffiliate linkrcmnd.app
Muji storageTheir words
Muji storage for organization.
-
Recommendsaffiliate linkrcmnd.app
USM Haller storageTheir words
USM Haller storage — long-term investment worth saving for.
16 January
11 September 2025
Nothing matches.
Beliefs
Korrents What they believe 9 beliefs — each backed by an exact quote.
Each is a — compiled by korrents.com, not by them: the one-line wordings are korrents', the quotes are theirs.
Recent
AI has made ability nearly free, making taste the main bottleneck separating good creators from mediocre ones.
As AI has allowed more and more people to create things, the biggest differentiation, the biggest skill people are lacking, is taste itself.
If You Want Taste, You're Gonna Have to Eat Said 5 Jul 2026
AI can hand you the end result of a skill without the attentive practice that used to build it.
It gives you the destination without the hours of noticing that used to get you there.
If You Want Taste, You're Gonna Have to Eat Said 5 Jul 2026
Taste is not about consensus or criticism, but the courage to value what genuinely resonates with you.
Taste isn't consensus. It's not judgment first, either. It's easy to be a critic. Curiosity has to come first, because without curiosity you never broaden your horizons.
If You Want Taste, You're Gonna Have to Eat Said 5 Jul 2026
Show 6 more
Good automation design starts from whether context must persist between runs, not from building a complex system.
The best automations do not start with a complicated system. They start with knowing whether the next run needs a clean slate or the same thread.
Two kinds of scheduled work in Codex Said 28 Jun 2026
AI agents should draft work on a person's behalf but never send or act as if they were that person.
Level 5 teaches the trust boundary I actually care about: draft the work, do not impersonate me.
Six levels of complexity in a Codex morning brief Said 18 May 2026
A recurring AI workflow improves more through ongoing user feedback than by being fully specified upfront.
This is why I like the thread version more than a generic scheduled report. The brief improves as you complain about it.
Six levels of complexity in a Codex morning brief Said 18 May 2026
An AI agent's execution is only as good as the goal and the verification criteria given to it; ambition without verification is just a wish.
Execution is only as good as the goal and the verification you give it. Ambition without verification is just a wish.
Codex-maxxing Said 10 May 2026
Storing an AI agent's memory as files forces it to compress what it learns into a form that survives even when the conversation itself doesn't.
Files force the agent to compress experience into a form that can survive the thread.
Codex-maxxing Said 10 May 2026
One well-made garment outperforms multiple seasons of trend-driven fashion purchases.
One good Yohji piece annihilates three seasons of hype drops.
Things Said 24 Jan 2026
What is a korrent?
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.
Recommends rcmnd
rcmnd What they recommend 14 things — each backed by an exact quote.
Compiled by rcmnd.app, not by them: the quotes are theirs, and each links to the post it was copied from.
Recent
Recommends USM Haller storage
Uses Muji storage
Liked Milbon Curl Mousse
Show 11 more
Liked Extreme Cashmere
Extreme Cashmere — Dutch brand making oversized, genderless cashmere knits. Their pieces are numbered instead of named.
jxnl.co 24 Jan 2026
affiliate link
Loved Yohji Yamamoto
Loved Wyatt harness boots
I've worn my Wyatt harness boots for years and they're still pristine.
jxnl.co 24 Jan 2026
affiliate link
Uses Rimowa luggage
Loved Philips Hue
Uses Kinesis Advantage 360
Uses Herman Miller Embody
Loved Harman Kardon Aura Studio 3
the single best speaker I've ever owned, perfect for hosting parties.
jxnl.co 24 Jan 2026
affiliate link
Liked CeraVe Ultra-Light Gel
lightweight moisturizer with ceramides and hyaluronic acid. After a week, I received compliments on my skin.
jxnl.co 24 Jan 2026
affiliate link
Loved Manta Sleep eye mask
For travel, Manta Sleep eye mask — they have hot and cold versions which I love.
jxnl.co 24 Jan 2026
affiliate link
Uses Purple Mattress
Where they publish
Site jxnl.co His writing on RAG, retrieval systems, coding agents and AI engineering practice.
Recent
- If You Want Taste, You're Gonna Have to Eat 5 Jul 2026 A reflection on taste, style, attention, and why AI makes the ability to notice matter more than ever.
- Two kinds of scheduled work in Codex 28 Jun 2026 A simple rule for choosing between Scheduled Tasks and Scheduled Messages in Codex.
- Three Ways Codex Can Use a Computer 16 Jun 2026 When to use Computer Use, Chrome, or the in-app browser in Codex.
Show 17 more
- Six levels of complexity in a Codex morning brief 18 May 2026 A simple way to teach Codex through an AI-powered morning brief that grows into automations, project threads, drafted work, and memory vaults.
- Codex-maxxing 10 May 2026 How I use Codex as a place where long-running work can live.
- What Music Do You Listen To? 2 Apr 2026 My top albums and artists from Spotify — and what the mix actually says about taste.
- Sunsetting 567 Labs and Open Sourcing the Course Content 2 Feb 2026 Sunsetting 567 Labs, closing the courses today, and open sourcing the written content from transcripts as ebooks.
- Things 24 Jan 2026 A list of things I've been using and plan to use.
- Do Your Engineers Know How to Leverage AI? 11 Sept 2025 A letter to the readers of the AI Coding Accelerator.
- Coding Agents Speaker Series: Lessons from Industry Leaders 11 Sept 2025 Deep insights from the teams behind Devin, Amp, Cline, and Augment on building effective coding agents. Learn why simple approaches are winning over complex architectures in autonomous coding systems.
- RAG Master Series: Complete Guide to Retrieval-Augmented Generation 11 Sept 2025 Comprehensive guide to building, improving, and scaling RAG systems. From fundamentals to advanced enterprise implementations with real-world examples and proven strategies.
- Domain Experts: The Lever for Vertical AI 11 Sept 2025 How to successfully apply LLMs in specialized industries by building domain‑expert review loops, augmenting prompts with expert knowledge, and earning customer trust.
- Text Chunking Strategies for RAG Applications 11 Sept 2025 Technical session with Anton from ChromaDB on text chunking fundamentals, evaluation methods, and practical tips for improving retrieval performance
- Why Grep Beat Embeddings in Our SWE-Bench Agent (Lessons from Augment) 11 Sept 2025 Insights from Colin Flaherty on building autonomous coding agents and how agentic approaches reshape retrieval-augmented generation systems.
- Why Cognition does not use multi-agent systems 11 Sept 2025 A deep dive into why multi-agent systems might not be the optimal approach for coding contexts, exploring context engineering, challenges of context passing between agents, and how single agents with proper context mana…
- Stop Trusting MTEB Rankings (Kelly Hong, Chroma) 11 Sept 2025 A deep dive into generative benchmarking - creating custom evaluation sets from your own data to better assess embedding model performance.
- How Extend Achieves 95%+ Document Automation (Lessons from Eli Badgio) 11 Sept 2025 Insights from Eli Badgio, CTO of Extend, on mapping document workflows, building task-specific evaluations, and implementing partial automation with human-in-the-loop approaches for 95%+ extraction accuracy.
- The 12% RAG Performance Boost You're Missing (Ayush, LanceDB) 11 Sept 2025 Practical approaches to enhancing retrieval quality through fine-tuning, re-ranking, and understanding trade-offs in RAG systems
- Why Glean Builds Custom Embedding Models for Every Customer 11 Sept 2025 How Glean achieves 20% search performance improvements through customer-specific embedding models, unified data architecture, and smart feedback loops that most enterprise AI companies are missing.
- Lexical Search in RAG Applications 11 Sept 2025 Guest lecture with John Berryman on traditional search techniques, their application in RAG systems, and how lexical search complements semantic search
Link verified 4 Sept 2026. Recent items update automatically from the channel.
x.com @jxnlco Day-to-day posting on RAG and AI engineering.
Recent
- Me and ChatGPT 16 Oct 2026
- Going to start buying more 3d printers for myself now. 16 Oct 2026
- People don’t understand. This is chat on web accessing your actual tabs on chrome via the extension. 15 Oct 2026
Show 17 more
- best advice nick every told me was that if you own one real eames, you can buy a fake second one and no on will ever doubt you. 15 Oct 2026
- Man, @trq212 always knows what to say. 15 Oct 2026
- so far this past 2 batches of yc founders have 1. tried to enter my apartment by following me and making small talk at 11pm 2. hit me with a car outside of my house 3. doxxed my gf's tiktok 4. tried to talk to me while i was at the bottom of a squat 5. grabbed my arm before getting into an uber to pitch me their startup please guys be normal 15 Oct 2026
- Dm me if you work here 14 Oct 2026
- taste is the moat 14 Oct 2026
- Maybe I’ll buy an Xbox instead of another play station I’ve been Sony boy since ps1 14 Oct 2026
- its called RSI only when it comes from the A\ region of SCM, when i do it its they just call it slop city 13 Oct 2026
- it was with sol 5.6 ._. 13 Oct 2026
- Not all the wood of a temple needs to be unknotted. You can use the best pillows at the entrance and the walls. As they worse. You move them to the back. And worse you use as shingles and roofing. Knowing next season they may be used as firewood. This is true of software and slop as well. 11 Oct 2026
- This happens even at labs I think 11 Oct 2026
- when is premier pro mcp? 10 Oct 2026
- anyone a freediver in Monterey area? I'm trying to do a few kelp forest dives this year 8 Oct 2026
- i lacked the spells and incantations these past couple of days, i’ve been trying to do a little more cad design, making things i eventually want to 3d print. i didn’t lack the ambition. i didn’t lack the desire to make something and will it into existence. i just didn’t have the spells and incantations i needed to make it at the level i wanted to. i lacked the vocabulary. and for the first time in a while, i really had to learn. i had to learn about what makes 3d printing possible, how to make parts more efficient and durable, and how to think about the real world. i had to develop the words… 8 Oct 2026
- Intelligent UI slaps. 1) scheduled task finds a workout slot for me 2) shows me the workout with a visualization. 3 saves it to a space. 8 Oct 2026
- devday 2026: from single player to multiplayer agents 8 Oct 2026
- my dev day talk is live enjoy! I make peace signs cause people were taking my photo, not cause im super awkward on stage let me know how it was, i have not watched this yet. 7 Oct 2026 youtube.com
- gf lost her bike and then found it again i designed a discrete AirTag mount for her bike that also acts as a reflector can you tell how it works? 7 Oct 2026
Link verified 4 Sept 2026. Recent items update automatically from the channel.
LinkedIn linkedin.com/in/jxnlco His professional profile.
Link verified 4 Sept 2026.
GitHub github.com/jxnl His open-source work, including the instructor library and the source of jxnl.co.
Recent
- instructor-go — structured outputs for llms 2 Oct 2026
- resume-nextjs 11 Sept 2026
- lmsys-query-analysis 11 Sept 2026
Show 10 more
- ragas-alt 11 Sept 2026
- systematically-improving-rag 11 Sept 2026
- blog 11 Sept 2026
- meetings 11 Sept 2026
- jxnl 29 Jul 2026
- dots 14 Jul 2026
- personal-monorepo-template 22 Jun 2026
- tao-te-ching 13 Apr 2026
- book-of-disquiet 12 Apr 2026
- presentations 16 Jan 2026
Link verified 4 Sept 2026. Recent items update automatically from the channel.
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.