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prvnsmpth

126 karma · joined June 4, 2015

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prvnsmpth··on Kimi K2.6 just beat Claude, GPT-5.5, and Gemini in a coding challenge
Use kimi 2.6 for planning and a cheap model (preferably local) for execution, and then kimi once again for reviewing it. Then finally I review the code. Saves a lot on tokens.
prvnsmpth··on Kimi K2.6 just beat Claude, GPT-5.5, and Gemini in a coding challenge
You can sign up for a plan on the kimi code platform and use it via the pi.dev coding agent, or opencode. In planning, I’d say it’s almost on par with Claude Opus.
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
Thanks Philippe! You guys have been super helpful on slack!
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
So it depends on the app - e.g., Google has domain-wide delegation where the workspace admin can provide service account creds that allow us to impersonate all users in the workspace and index all their files/email. During indexing, we determine the users/groups who have permissions file and persist that in the db. (It's not perfect, because Google Drive permission model is a bit complex, but I'm working on it.) This model is much simpler than doing per-user OAuth.

In general, the goal is to use an org-wide installation method wherever possible, and record the identify of the user we are impersonating when ingesting data in the ACL. There are some gaps in the permission-gathering step in some of the connectors, I'm still working on fixing those.

prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
Fair point, although I think we have OpenAI to blame for that - for buying chat.com and pointing it to the most popular textual AI interface of them all :)
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
So far both projects are quite similar… the only major difference being the search index. Onyx uses vespa.ai for BM25 and vector search, I decided to go down the Postgres-only route.
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
That's a good point, it might make sense to clarify that for individuals who want to self-host. I'll make the change, thanks!
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
Exactly, enterprise customers almost always use private model endpoints on their cloud provider for any serious deployments. Data stays within the customer's VPC, data security and privacy is guaranteed by the cloud providers.
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
Thank you!

Typical RAG implementations I’ve seen take the user query and directly run it against the full-text search and embedding indexes. This produces sub-par results because the query embedding doesn’t really capture fully what the user is really looking for.

A better solution is to send the user query to the LLM, and let it construct and run queries against the index via tool calling. Nothing too ground-breaking tbh, pretty much every AI search agent does this now. But it produces much better results.

prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
Not yet, there’s a Microsoft connector implementation, but it only does Sharepoint, OneDrive, Outlook etc. and I haven’t tested it thoroughly yet. Teams required some special setup to work IIRC, so I skipped it. Will keep it on the roadmap though!
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
Thanks for sharing! Big part of the reason why I decided on postgres, everything I've read about people using it in prod tells me that most organizations never really grow beyond requiring anything more than what it offers.
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
Yeah, Omni uses Postgres and pgvector for search. ParadeDB is essentially just Postgres with the pgsearch extension that brings in Tantivy, a full-text search engine (like Apache Lucene).
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
Oops, sorry! That page is still a WIP, haven't pushed it yet. The plan was to expose the main search and chat APIs so that users can build integrations with third-party messaging apps (e.g. Slack), but haven't gotten around to properly documenting all the APIs yet.
prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
I've done small scale experiments with up to 100-500k rows, and did not notice any significant degradation in search query latency - p95 still well under 1s.

I haven't directly compared against Elasticsearch yet, but I plan to do that next and publish some numbers. There's a benchmark harness setup already: https://github.com/getomnico/omni/tree/master/benchmarks, but there's a couple issues with it right now that I need to address first before I do a large scale run (the ParadeDB index settings need some tuning).

prvnsmpth··on Show HN: Omni – Open-source workplace search and chat, built on Postgres
Thank you!

Currently permissions are handled in the app layer - it's simply a WHERE clause filter that restricts access to only those records that the user has read permissions for in the source. But I plan to upgrade this to use RLS in Postgres eventually.

For Slack specifically, right now the connector only indexes public channels. For private channels, I'm still working on full permission inheritance - capturing all channel members, and giving them read permissions to messages indexed from that channel. It's a bit challenging because channel members can change over time, and you'll have to keep permissions updated in real-time.

prvnsmpth··on Ask HN: What are you working on? (May 2025)
https://casepro.club

A platform for consulting aspirants to practice business case interviews.

Finding case prep partners is a major pain point for B-school students/consulting aspirants. Fortunately, frontier AI models are now good enough to function as surprisingly competent case interviewers.

prvnsmpth··on The Animated Transformer: An Intuitive Explanation of the Transformer Model
I wrote a short article explaining the Transformer model and how it works, using the Manim library for generating animations. Please read through if the topic interests you, and leave your thoughts and feedback!
prvnsmpth··on Show HN: Beast – A Build System
It doesn’t make sense to have your build tool call another build tool to actually perform the build. In that case, why I would not just use Gradle directly?
prvnsmpth··on Show HN: A tool to make strong passwords that are easy to remember
Congrats on building and launching your project!

That said, let me just go ahead and share the obvious: https://xkcd.com/936/

prvnsmpth··on Soybean oil affects hypothalamus, causes genetic changes in mice: study (2020)
The botanical classification doesn’t matter - coconut oil is primarily saturated fat which is what makes it better for you over the PUFA that comes from seed oils.
prvnsmpth··on Show HN: A mastermind-like version of Wordle
There should be an 'X' at the top right, is it missing for you?
prvnsmpth··on Show HN: A mastermind-like version of Wordle
Thanks for pointing it out! Gotta fix this on Android...
prvnsmpth··on Show HN: A mastermind-like version of Wordle
Yes! I plan to add that next.
prvnsmpth··on Show HN: A mastermind-like version of Wordle
Thanks :) I'm going to update the dictionary to use the same one as Wordle's, so that should be fixed.
prvnsmpth··on Show HN: A mastermind-like version of Wordle
Yeah I guess so! It isn't too much work :)
prvnsmpth··on Show HN: A mastermind-like version of Wordle
Agreed, tracking time is an interesting idea!
prvnsmpth··on Show HN: A mastermind-like version of Wordle
That's right, wouldn't want to make it too easy!
prvnsmpth··on Show HN: A mastermind-like version of Wordle
Ah, yes I should have done that to begin with. Thanks!
prvnsmpth··on Show HN: A mastermind-like version of Wordle
Ah, yes, I think the instructions should be a bit clearer about that.
prvnsmpth··on Show HN: A mastermind-like version of Wordle
Well, you can blame my bad programming for that :)

When you press backspace, the focus shifts to the previous cell, deleting the contents of the current cell. When you've entered < 5 characters in the current row, the focus is on the next empty cell. So the first backspace only takes you back to the previous cell, and the second backspace clears the last entered character.

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