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psadri

1,332 karma · joined August 28, 2012

Creator of Y! Pipes and Polyvore.
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psadri··on Hey, n00b, we didn't hire you to complete tasks
It’s interesting that you have to be an A to tell the rest apart.

And good luck if you have a lot Bs that believe they are As.

psadri··on Emacs 31 is around the corner: The changes I'm daily driving
Claude: configure my Emacs such that … has worked pretty well for me lately.
psadri··on πFS
This is part of the plot in Murakamui's Hard Boiled Wonderland and the End of the World.
psadri··on I'm skeptical about efforts to revolutionize schooling
I believe 1:1 is fundamentally different than ever 1:2 ratio. So, even if you can have 3 person classrooms, I don't think it would be the same as 1:1 time.

As soon as you are working with more than one student, you have to teach the common denominator, which may or may not (more often not) be the thing that will most help any of the students.

In 1:1, you can identify were the specific gaps in skill, knowledge are and tailor the session to close them. Personalized.

psadri··on I'm skeptical about efforts to revolutionize schooling
This is even a more interesting idea! I guess similar to the teacher assistant system in higher education. One version of this could be students a year ahead teaching the previous year's students. In elementary school it might be tricky, because besides interest, there are issues are classroom discipline and behavior which might be beyond the capabilities of an 8th year old.
psadri··on I'm skeptical about efforts to revolutionize schooling
If you had the budget for two teachers, I’d utilize them as one teaching in the traditional way, and the other spending 1:1 times with each student (20 students in a class → 1-1:30 hr / student).
psadri··on What British people mean when they say 'sorry'
Separately, I love the word “bloke”. I wish it would take off here in the US.
psadri··on Show HN: Honker – Postgres NOTIFY/LISTEN Semantics for SQLite
You are correct. I apologize. I seemed to have read the next pragma’s depreciation notice!

Aside from this - SQLite has tons of cool features, like the session extension.

psadri··on Show HN: Honker – Postgres NOTIFY/LISTEN Semantics for SQLite
For one it seems to be deprecated.
psadri··on ggsql: A Grammar of Graphics for SQL
What do you think is missing? I'm a big SQL fan and the idea of direct SQL to X seems appealing at least on the surface.
psadri··on Claude Design
Most of the software we interact with is at the end of the day some db tables, queries to read/write, and some ui to read/write. There have been so many times I wished I could just do my own db joins on the underlying db to get the views I wanted. But I can’t - because the app has pre-defined ui/query paths.

With AI, I should be able to ask for things the product designers didn’t anticipate or left out and the system could query, create ui on the fly, etc…

psadri··on Claude Design
What’s interesting here is that with AI, all our interfaces should evolve away from previous generation rigid forms / buttons / tables etc. towards something more fluid / dynamic / “natural”. Yet all the AI coding is geared towards producing more of the former.
psadri··on Inside Nepal's Fake Rescue Racket
I did the EBC trek last year and at ~4400 meters, we heard about a local Nepalese woman dying from complications of AMS in the local clinic. There might be fishy things going on with the rescues, but the health risks are real.
psadri··on Beagle, a source code management system that stores AST trees
Related, I’d love an editor that’d let me view/edit identifier names in snake_case and save them as camelCase on disk. If anyone knows of such a thing - please let me know!
psadri··on LLM Structured Outputs Handbook
Could you share some samples / pointers on how you do this?
psadri··on ManusAI Joins Meta
They launched March 2025. It’s great that’s considered a long time ago.
psadri··on Prompt caching for cheaper LLM tokens
Does anyone actually compute / use this key feature? Or do you rely on implicit caching? I wish HN had a comment with a poll feature.
psadri··on How Google Maps allocates survival across London's restaurants
Google Maps or any other aggregator has an inherent interest in market participant diversity. A lot of suppliers would mean competition, which results in ad spend, which result in higher revenue for the aggregator. Same with Google Search.

It's an interesting equilibrium point. They want local businesses to suffer enough to pay up for ads. But also not too much that they die. A good local business that does not need to advertise because it is simply good is actually a burden to the aggregator even though it is exactly what the end users want to see.

In the past, when I was a in position to build a search engine, we took the trouble of always including organically ranked results that were genuinely good, regardless of whether we got paid or not. I felt it was a long term investment into creating real value for our end users and therefore our service.

psadri··on Perl's decline was cultural
25 years ago Perl allowed you to express what was in your head 10x more concisely as in other mainstream language (which have since caught up with some of the features).

This was not the best when it came to others (or even yourself 6 months later) reading the code. But it was great for cranking stuff out that was simply too tedious in other languages.

psadri··on Structured outputs on the Claude Developer Platform
What are some examples that you can’t express in json schema?
psadri··on Can you save on LLM tokens using images instead of text?
I wonder if these stay in the prefix cache?
psadri··on Show HN: Why write code if the LLM can just do the thing? (web app experiment)
Awesome experiment!!

I did a version of this where the AI writes tools on the fly but gets to reuse them on future calls, trying to address the cost / performance issues. Migrations are challenging because they require some notion of an atomic update across the db and the tools.

This is a nice model of organically building software on the fly and even letting end users customize it on the fly.

psadri··on Do you know that there is an HTML tables API?
The trouble is not populating it. The trouble is that tables, even though structured semantically, give you absolutely no functionality. There are no search, filter, sort, or selection features that you get.
psadri··on Kafka is Fast – I'll use Postgres
A resource that would benefit the entire community is a set of ballpark figures for what kind of performance is "normal" given a particular hardware + data volume. I know this is a hard problem because there is so much variation across workloads, but I think even order of magnitude ballparks would be useful. For example, it could say things like:

task: msg queue

software: kafka

hardware: m7i.xlarge (vCPUs: 4 Memory: 16 GiB)

payload: 2kb / msg

possible performance: ### - #### msgs / second

etc…

So many times I've found myself wondering: is this thing behaving within an order of magnitude of a correctly setup version so that I can decide whether I should leave it alone or spend more time on it.

psadri··on Karpathy on DeepSeek-OCR paper: Are pixels better inputs to LLMs than text?
The pixel to sounds would pass through “reading” so there might be information loss. It is no longer just pixels.
psadri··on The case for the return of fine-tuning
Lots of caveats here in the following statement: if your application is not fully leaning in to frontier model capabilities, you are probably building a previous generation product.
psadri··on Andrej Karpathy – It will take a decade to work through the issues with agents
When I think about a problem, I consciously explore a tree (or graph) of possibility chains. This requires a mental space to keep track of “state”. Sometimes jotting things down on paper helps if I can’t keep it all in my head. The process is: - generate some possibilities - rank them based on intuition (this might happen subconsciously!) - ask what if we follow possibility Pn - push Pn on to the stack. - recourse or pop stack if deadened

I feel LLMs are fairly capable when it comes to doing each of those steps in isolation. But not when it is all put together as a process.

psadri··on A few things to know before stealing my 914 (2022)
That’s funny. Yeah. I wrote this on the fly. It can use multiple passes to add layers of self reference / depth.
psadri··on A few things to know before stealing my 914 (2022)
I feel like this could be adopted for your homegrown "whatever" framework (eg: UI framework, Auth framework, …)

Congratulations on getting hired to this team! You probably count yourself lucky, but don't. We had been trying to fill this role for the past 5 months and every candidate would run away as soon as we showed them our homegrown auth framework. But don't run yet please, do give it a try.

So, you are still here? It must be a bad job market out there. Looks like you found the documentation for the project. Let me save you the trouble, it has not be updated since 3 years ago (about the time John quit). No worries, there are lots of usage examples in the Perforce repo. Perforce is like Git but that's for another day.

So you managed to checkout the code. Before you type "make", let me remind you to install this particular version of Python and set up your LD paths. Make sure you don't have anything else relying on Python because they will probably never work again.

If you hit the dreaded "std::vector<std::__cxx11::basic_string<char> > >'} is not derived from 'const char*'" error, ask Joe (if he is still around) to show you which header file you need to tweak. That's not checked in because it breaks the build on a legacy server we still have running for one of the customers.

… someone else please take over… :-)

psadri··on ProofOfThought: LLM-based reasoning using Z3 theorem proving
Watch the movie “The Thirteenth Floor”
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