Alex Klarfeld

[Alex Klarfeld @AlexKlarfeld]

pretty creative and interesting interpretation of a codebase

[Liran @lsharir]

Nobody is reviewing your pull requests.

AI made code cheap to write, and review the bottleneck.

I re-imagined codebases as cities, where pending changes are activity, and contributors are the inhabitants. (see it below on openclaw's repo)

[Alex Klarfeld @AlexKlarfeld]

@irl_danB 100% agree. I don’t know why all roads lead to email but they definitely do. Every time I design my ideal agent management experience, it looks like an email inbox.

[Alex Klarfeld @AlexKlarfeld]

@googrish This is awesome - congrats Girish!

[Alex Klarfeld @AlexKlarfeld]

Extremely cool product. Especially with token costs continuing to skyrocket and general-purpose models taking a ridiculous amount of time to "think" about very specific tasks.

Congrats to @googrish and Castform on the launch!!!

[girish @googrish]

“don’t train your own model” is common ai advice. it's wrong. your token bill's the proof.

today, we’re excited to launch castform into open preview. castform is the easiest way for you to train your own model, on your own data.

open-weights models are performant and much cheaper. when trained on your task & proprietary data, they beat closed models. the thing standing between you and that was weeks of plumbing & years of ml expertise.

with castform, model training is as simple as prompt engineering. @castformai

bring your agent traces or raw corpora. castform turns it into training data, picks the right algorithmic recipes, manages gpus, and gives you an ide to watch and chat with your model as it learns.

see what you can build with castform👇

[Alex Klarfeld @AlexKlarfeld]

@zeeg @ThePrimeagen The Bobiverse is truly one of the best

[Alex Klarfeld @AlexKlarfeld]

Video is 13 minutes long sped up to 17 seconds.

Who’s got time for a 13 minute “API call”?

[Browser Use @browser_use]

APIs are dead

[Alex Klarfeld @AlexKlarfeld]

wtf I gave Claude access to my MGM Rewards account and all I got was comped rooms at Excalibur

[Kamryn Ohly @KamrynOhly]

Our team is stunned.

We gave Claude Opus 4.6 by @AnthropicAI $10k to trade on @Polymarket.

It’s now has an account value of $70,614.59.

This is a new era of model performance in trading and predicting outcomes in the face of uncertainty.

@predictionbench

[Alex Klarfeld @AlexKlarfeld]

@mastra is extremely dope. @sh_reya, @calcsam, and the whole team have been absolutely excellent to work with.

I can't imagine building agents on any other framework.

[Sam Bhagwat @calcsam]

We’re excited to announce today that @mastra has raised a $22M Series A led by Spark Capital.

This brings our total capital raised to $35M:

[Alex Klarfeld @AlexKlarfeld]

@amyquispe I'm mad they're trying to pass Dana off as a Yinzer

[Alex Klarfeld @AlexKlarfeld]

the @MonacoGTM poker tournament was sick, thanks for having me @samdblond and co.

[Alex Klarfeld @AlexKlarfeld]

@pk_iv @MonacoGTM 👏

[Alex Klarfeld @AlexKlarfeld]

this is cool and all, but didn't Ross Ulbricht do this like 15 years ago (allegedly)

@RealRossU

[Alex Klarfeld @AlexKlarfeld]

Browser automation as an agent tool sucks at high volume or high value tasks.

We know this, and our customers know this.

First batch of hoodies is for existing customers, but DM if you want in on the second batch.

[Alex Klarfeld @AlexKlarfeld]

Legacy software was built for humans, not agents.

We're fixing that.

https://t.co/KAdgvcezOJ

[Alex Klarfeld @AlexKlarfeld]

@9th insanely well done

[Alex Klarfeld @AlexKlarfeld]

@shwicicle that’s a close one

[Alex Klarfeld @AlexKlarfeld]

shout out to the dude who had to tell our HS English class his email was [email protected]

[Sundar Pichai @sundarpichai]

2004 was a good year, but your Gmail address doesn't need to be stuck in it.

To say goodbye to [email protected] or [email protected] (or whatever you were into at the time), go to your Google Account settings and choose any name available. You'll keep your old username and you can sign in with both.

[Alex Klarfeld @AlexKlarfeld]

Deploying our new site and @vercel hit me with a Clippy jump scare. Genuinely thought Claude Code somehow accidentally injected Clippy.

You got me.