Marcio retweeted
So I was trying to understand why pull requests speeding up the Elixir version were being denied by the clankers while they were being accepted to Go/Express/Rust.
It turns out that, not only each project had a different starting point and a different prompt, but also each project also has a different set of verifications that they are required to pass!
For example, Elixir is the only guided to "preserve the pinned Rails reference behaviour", the only with a explicit verification that we are using Redis and draining its queue (so we cannot remove it while others can), and the only one actively enforcing it.
So it turns out that the people telling you to not read the code cannot even use AI to set up fair benchmarks (probably because they would have to read the code in order to do that).
You don't have to believe me, you can do your own research or ask your agent to do it for you. E.g. here is what Claude Code came back with: gist.github.com/josevalim/ae…
Replying to @dhh
Also extracted a separate verification project that's responsible for the benchmarking and checking of new implementations and improvements to the existing ones. The full report from the latest runs is there too. github.com/basecamp/once-cam…
Had GPT-6.1 Sol work on a promotional video for my app and the result is quite nice! apps.apple.com/app/apple-sto…
Marcio retweeted
I’m thinking about banning Claude code at Shopify until they change their mind and read AGENTS.md and .agents/skills etc.
Insisting on only reading CLAUDE.md sometimes leads to split brain problems when different team members use different tools. Just unnecessary.
Me looking at my desk: This looks fine...
Me looking at my desk through my phone to take a picture of it: WTF is this mess ?!
Marcio retweeted
The EU Commission in Brussels has shut off airco, but only for the lower floors, where the lower ranks work:
“It’s like feudalism,” a Commission official working on a lower level of the Berlaymont, granted anonymity to speak freely, told POLITICO on Friday, referring to the fact that upper floors housing commissioners got to keep their AC on. A second official agreed it was a “disgrace.” politico.eu/article/eu-commi…
Be Anthropic,
Repeatedly cry wolf saying their AI models are too dangerous and regulators need to do something about it, before releasing them a few months later.
Then being surprised when the models get an export ban...
Marcio retweeted
Woot! hex.pm will now serve llms.txt for Elixir/Erlang packages if the accept header is text/markdown. If you have a package and you use ExDoc, update to the latest version (which generates .md files by default) and republish your docs.
Link to the study: anthropic.com/research/AI-as…
Anthropic themselves found that vibecoding hinders SWEs ability to read, write, debug, and understand code.
not only that, but AI generated code doesn’t result in a statistically significant increase in speed
don’t let your managers scare you into increased productivity. show them this paper straight from Anthropic.

















