Constantin Rusu

build 👨‍💻| ex-Klarna | Living in London 🇬🇧
WIP Blog at

[Constantin Rusu @constantin_e21]

@LimitDossou Why buy new hardware when you can have fun building some software!

[Constantin Rusu @constantin_e21]

@0xInuarashi THIS is the kind of content I’m here for. Using a pixelated strip to communicate something to codex from inside the game is genius

[Constantin Rusu @constantin_e21]

If you're doing any sort of work with agents or harness engineering, Jev must have come up on your timeline.

It's been described as a low cost generalized classifier. @typesafeai themselves are calling it a "decision model". I'm calling it a "blazing fast opinion machine" (where the "state" and context you provide is incredibly important, of course).

A straightforward use case to implement in your agent and harness is auto-routing: "Which of the available models in the roster are best fit for the user's question and this task?". Where things could get really exciting is using it live in between tool calls to check if the model's trajectory and thinking is steering away from the objective or keeping on track - exactly the kind of situation where you want a quick opinion from a strong model but don't want to waste latency and cost on another LLM at runtime. Needs thorough testing for your agent and use cases though!

[Constantin Rusu @constantin_e21]

@hwchase17 "blazing fast opinion machine"

[Constantin Rusu @constantin_e21]

@theemozilla

[Constantin Rusu @constantin_e21]

@mitchellh @charles_irl sane and legit take

[Constantin Rusu @constantin_e21]

@mattpocockuk @dexhorthy this is the way

[Constantin Rusu @constantin_e21]

@Mappletons Will defo join!

[Constantin Rusu @constantin_e21]

@pamir_ai what I was thinking of hacking and building on my own you guys are putting out as a product, and with great design, I love it!

[Constantin Rusu @constantin_e21]

A lot of AI video that’s widely shared unfortunately has nothing to say. It’s certainly got frames and characters and environments and lighting but nothing to communicate beneath it all.

It’s very technically cool and output is impressive (and getting better) but the only thing it has to say is “look at how impressive and technically cool I am”.

[Constantin Rusu @constantin_e21]

@josephdelong I call this performative pixels

[Constantin Rusu @constantin_e21]

@juliarturc @inworld new julia video, rejoice! 🙌🙌🙌

[Constantin Rusu @constantin_e21]

@juliarturc But the question I’m wondering about is: have these agentic civilisations updated their Jira tickets?

[Constantin Rusu @constantin_e21]

@ccatalini “any unenforced and unmeasurable constraint is a degree of freedom for the agents. There's no evil intent. They're solving the problem we repeatedly benchmaxxed them on!”

Well said. People are too quick to assign intent to LLMs in the way that we define intent for humans.

[Constantin Rusu @constantin_e21]

@Thom_Wolf best invention of 2026, calling it now

[Constantin Rusu @constantin_e21]

@adamdotdev would love to find out

[Constantin Rusu @constantin_e21]

@martyamark agents on eink

[Constantin Rusu @constantin_e21]

@yatharthmann Straight up sci

[Constantin Rusu @constantin_e21]

@kentcdodds Cloud agents are out! Software factories are in! Inevitably the direction of agentic coding overall tbh

[Constantin Rusu @constantin_e21]

@jerrrrrrryyyyy import pandas as pd must hit different there