Update: Using this tool is as simply as, at https://claude.ai/settings/capabilities, adding api.exopriors.com to the allowed URLs and pasting in the prompt. That will give you full SQL+vector algebra search functionality over arXiv, LessWrong, community-archive.org tweets, etc. MCP connector incoming.

Howdy. I've built exopriors.com/scry, a powerful search tool over LessWrong, arXiv, HackerNews, community-archive.org, and more.

You and your agent can now query this rich dataset with the full expressive power of SQL + vector algebra.

Some example usage:
> what is Eliezer's most Eliezer post?

> find the 4 posts over 200 karma that are most distant from each other in every way (not the average of them). we want to create 4 quadrants.

> I need posts with the seriousness and quality of list of lethalities, but that's maybe not AI AND doom pilled (one or the other is okay).

As you can see, this is a very powerful paradigm of search. Structured Query Language is a real OG, embeddings and arbitrary vector composition takes it to the next level, and agents are very good at working with this stuff.

Some cool aspects of this project:

hardening up a SQL database enough to let the public run queries. There's so much collective trauma about SQL injection attacks that most people have forgotten that this is possible.
I've built on syntactic sugar for using custom vectors. Agents can embed arbitrary queries and refer to them with @vector_handle syntax. This compactness helps agents reason efficiently, and let's us not have to pass around 8kb vectors.
Opus 4.5 and GPT-5.2 allowed me to ship this in a couple weeks. The software intelligence explosion is here.
product-as-a-prompt, agent-copilot-targeted UX as a paradigm. It was pretty cool realizing I could e.g. just describe my /feedback API endpoint in the prompt, to open up the easy communication channel with users and help me iterate on the project better.
The affordability of Hetzner dedicated machines is worth mentioning. I was really feeling constrained with my very limited budget trying to build something real with DigitalOcean. I discovered Hetzner late Nov and just bought (started renting) a monster machine before I knew what to do with it, knowing something had to happen. The breathing room with the machine specs has really allowed the project to expand scope, with currently over 400 GB of indexes (for

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