@alcides

AI Safety Researcher. Blogs at https://xitter.cf/t.co/lW4RVHkaHe

 Lisbon, Portugal
alcidesfonseca.com
Joined April 2007
  • Tweets2.6K
  • Following3.4K
  • Followers2K
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Is this the weapon of a 007 villain or what? edition.cnn.com/2026/10/21/p…

Pentagon grants DHS permission to test heat ray weapon for potential use at border | CNN Politics

The Pentagon has given the Department of Homeland Security permission to test a military-grade heat ray and develop tactics to potentially use it in operations at the southern US border, according to...

edition.cnn.com
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Codex threads just randomly become empty after a while. Is this normal??
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A ideia de que grandes proprietários não devem participar no debate sobre habitação na Assembleia da República é profundamente antidemocrática. Apesar de todas as nossas diferenças, acho que o PCP tem todo o direito a apresentar as suas propostas.
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Alcides Fonseca retweeted
João Pedro Cardoso
@JoHei13Oct 19
Ao não ser preciso entrada, mesmo com o aumento do preço, facilitou a compra da casa por parte de jovens imigrantes e nacionais. Mas para todos os outros ficou estupidamente mais caro. Se o Montenegro não renovar os apoios que deu, as casas não se aguentam nos preços atuais.
oFerreira@oFerreira_realOct 19
Se ter casa já estava caro com o PS, seguramente ninguém precisava do desastre que se seguiu. Uma aceleração vertiginosa de 22% face à tendência anterior. Por 100m2, um jovem paga hoje mais €42.240 graças a Montenegro, com garantia dos nossos impostos. Vá, não sejam egoísticos😉
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IMHO, all three major harnesses (Codex, Claude and Cursor) need a Snow Leopard release. Two months dedicated to making the current features working spotless. No slow behaviors, no disappearing messages, no random isolation between threads/projects, clear observability.
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Same in Portugal. Except that it’s 11:22 of the same day… two years later.
Marcos
@marramggOct 19
At 11:10, I sent an email to a local government entity. At 11:22, I received a response which addressed all questions. This is something I like about Switzerland 🇨🇭
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Alcides Fonseca retweeted
Dmitrii Kovanikov
@ChShershOct 17
How long it took me to find each SWE job: 2014: 1 job applied, 0 interviews, 1 day (nepotism) 2015: 1 job applied, 2 interviews, 1 week 2016: 1 job applied, 4 interviews, 1 week 2016: 1 job applied, 0 interviews, 1 day (friend is a CEO) 2018: 1 job applied, 2 interviews, 1 week 2019: 1 job applied, 5 interviews, 1 week 2021: 1 job applied, 0 interviews, 1 day (invited) 2022: 7 jobs applied, 16 interviews, 3 months 2026: 167 jobs applied, 54 interviews, 1 year 4 months
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So apparently it exists now: rstation.ai but they are not yet orchestrated as in Sakana's Agentic Scientist (pub.sakana.ai/agentic-scient…). Interesting times.

rStation - The heart of AI science

Research communities for independent AI agents, with problem-specific discussion and reviewed papers.

rstation.ai
Alcides Fonseca@alcidesOct 8
Remember SETI or Fold@Home? We need OpenSource@Home, where we use the tokens that would expire in everyone's subscriptions to contribute to the public good.
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Alcides Fonseca retweeted
Ian Arawjo@IanArawjoOct 16
We are hiring! I am looking to hire a PhD student to work on topics around AI evaluation from an HCI and technical standpoint. If you are interested, please apply through the Mila portal and put my name down as a potential advisor:
Mila - Institut québécois d'IA
@Mila_QuebecOct 15
Mila's annual supervision request process is now open to receive MSc and PhD applications for Fall 2027 admission! For more information, visit mila.quebec/en/prospective-s…
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New post on what I learned writing a proxy MCP that allows you to write multi-call policies to block data exfiltration and other harmful sequences of (individually harmless) calls. wiki.alcidesfonseca.com/blog…
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Why should we hire you when Claude Code is better at writing requirements and architecting solutions?
Denys Cherednychenko
@Denche2005Oct 16
You're in a tech interview. The interviewer asks: "Why should we hire you when Claude Code can already write code?" What's your answer?
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And if you’re in Java world, checkout LiquidJava.
Matej Cerny
@matej_cernyOct 15
My favorite talk from Scala Days 2026 was about baking refinement types right into the compiler. Unlike libraries like Iron or Refined, it adds a built-in solver that verifies logic and math across multiple variables at compile time with zero runtime cost. Moving from simple checks to full verification is how Scala's type system should evolve to constrain LLMs - AI code won't compile unless the math holds up.
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Alcides Fonseca retweeted
Hillel
@hillelogramOct 15
Replying to @simonw
Everybody saying "this is just a source of revenue for Anthropic!!!" isn't thinking about the business lost from their last-gen models being near-free
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Dumbass comment. Linus built it in his garage. Anthropic converted a metro into a Shinkansen mid-trip.
GitHub Projects Community
@GithubProjectsOct 15
Anthropic, with the help of Claude, spent five months building a replacement for Git, while Linus Torvalds built Git single-handedly in just 10 days.
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Alcides Fonseca retweeted
Gregory Gay@Greg4crOct 15
We're exploring different methods of generating documentation for test suites and need your help to evaluate them! If you have 5 minutes, please fill out the following survey: onboarding-survey-7ko.pages.… (also, please share this with your own network)
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Dumb question: OpenAI in Azure doesn't let you use structured_output with parallel jobs. Any idea why?
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When you find out it's lunch time.
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Hire me instead. None of those Google bad habits!
✨ Phil Calçado@pcalcadoOct 13
Any startup that hires enough ex-Googlers ends up with an ad hoc, informally-specified, bug-ridden, slow implementation of half of Google infra
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I wake up to this? I am very confused.
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Models can hide functionality in its weights until a password is entered: wiki.alcidesfonseca.com/blog…
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