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Dan Federman

@dfed.me

Infrastructure. Urbanism. Biking. Mobile apps & frameworks.

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Latest posts by Dan Federman @dfed.me

Now that’s what I’m talking about!

04.03.2026 16:57 👍 1 🔁 0 💬 0 📌 0
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We can’t clean up Washington without restoring integrity to the Supreme Court.

That’s why I believe we should expand the Supreme Court to 13 justices. And then, institute term limits.

Because an appointment to the Supreme Court shouldn’t mean a lifetime lack of accountability.

04.03.2026 02:35 👍 9938 🔁 1956 💬 275 📌 201

Assassinating a head of state of a country we haven’t declared war with feels like a new bridge, though, no?

01.03.2026 13:08 👍 0 🔁 0 💬 1 📌 0

So we’re doing assassinations now? This doesn’t seem like good precedent

28.02.2026 22:22 👍 4 🔁 0 💬 1 📌 0

I would expect no further recipients will be named

28.02.2026 19:57 👍 0 🔁 0 💬 0 📌 0

Your framing is off. It’s not about convenience. It’s about a theory of power. If you have none, your values are worthless.

Ethics only matter in context.

28.02.2026 17:31 👍 0 🔁 0 💬 1 📌 0

what is the point of working ethically if your work is irrelevant

28.02.2026 17:22 👍 0 🔁 0 💬 1 📌 0

There’s a lot of uncertainty right now, but I can confidently predict that the FIFA Peace Prize committee will never recover from this.

28.02.2026 17:20 👍 6 🔁 0 💬 1 📌 0

What? The ethics of a non-competitive company literally do not matter. The reason the feds threw a shit fit at Anthropic this week is they wanted to use Claude, presumably because it offered the better model

28.02.2026 16:04 👍 0 🔁 0 💬 1 📌 0

This move was arguably in service of their mission. If Anthropic’s models can’t compete on capability then it doesn’t matter if they have strong alignment.

28.02.2026 15:42 👍 0 🔁 0 💬 1 📌 0

Pretty impressed with Anthropic today. Less so by their competition.

28.02.2026 04:46 👍 3 🔁 0 💬 1 📌 0
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So I had Claude analyze if there was a statistically significant correlation between the day an app was submitted and review times, and the results are somewhat interesting.

Ship on Sunday or Wednesday for the best results.

26.02.2026 06:37 👍 0 🔁 0 💬 0 📌 0

every tool in my stack that requires manual intervention to paper over an API gap is friction that compounds. make things seamless. I'm increasingly willing to swap out dependencies that don't support agentic workflows in favour ones that do.

25.02.2026 02:32 👍 19 🔁 2 💬 2 📌 0

For sure. But would be curious to put that graph next to funding levels for the traffic enforcement division

22.02.2026 16:50 👍 2 🔁 0 💬 0 📌 0
A chart showing traffic tickets issued in San Francisco, with a sharp drop that began in 2014, hit bottom in 2022 when just a few tickets were issued, and has now rebounded almost to 2014 levels.

A chart showing traffic tickets issued in San Francisco, with a sharp drop that began in 2014, hit bottom in 2022 when just a few tickets were issued, and has now rebounded almost to 2014 levels.

We’re back, baby!

21.02.2026 23:10 👍 329 🔁 40 💬 8 📌 12

The reason no one can explain how this works is because it is pure snake oil.

21.02.2026 17:16 👍 75 🔁 9 💬 3 📌 0
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I’m pretty confident in calling this fake. The user who posted it seems to be part of a substantial network of accounts with similar usernames all posting and commenting on each other’s content. Ironically it’s a great example of an AI agent making stuff up to tell you what you want to hear

15.02.2026 09:50 👍 361 🔁 110 💬 14 📌 20
Preview
CocoaHeads x Swift Language User Group (SLUG) | February 19th Meetup · Luma Please join us for this month's session together learning about Swift with talks by local members of the Swift community. We are so excited to see you all…

📢 CocoaHeads x SLUG Update!

Thrilled to announce @dfed.me is now leading the AI session at @sentry.io! 🎤

He joins @saagarjha.com (Swift Concurrency) for a night of incredible tech talks. Feb 19—grab your spot! 👇

luma.com/tqb3l8w6

11.02.2026 03:53 👍 1 🔁 2 💬 0 📌 0

My point is that your policy prescriptions are based on incorrect numbers and effectively amount to wishcasting.

Meanwhile you’re attacking YIMBY folk, who are actually doing the work of creating housing and making it easier to build supportive housing.

What is your goal here?

08.02.2026 21:28 👍 2 🔁 0 💬 2 📌 0
For rent 34,278 31.4%
Rented, not occupied 9,998 9.2%
For sale only 5,636 5.2%
Sold, not occupied 4,500 4.1%
For seasonal, recreational, or occasional use 13,850 12.7%
For migrant workers 92 0.1%
Other vacant 40,885 37.4%
Total 109,239 100%

For rent 34,278 31.4% Rented, not occupied 9,998 9.2% For sale only 5,636 5.2% Sold, not occupied 4,500 4.1% For seasonal, recreational, or occasional use 13,850 12.7% For migrant workers 92 0.1% Other vacant 40,885 37.4% Total 109,239 100%

Yeah the majority of these homes are not actually long-term vacant. These are mostly homes that are in the process of changing owners/tenants. There are still some long-term vacant homes, sure, but… far fewer than you suggest.

08.02.2026 21:22 👍 2 🔁 0 💬 1 📌 0

And what is your evidence that these homes would be filled by homeless? You’re making wild and baseless assertions here

08.02.2026 20:08 👍 2 🔁 0 💬 1 📌 0

What? No. If they’re paying the tax the units are empty

08.02.2026 20:08 👍 2 🔁 0 💬 1 📌 0

Your point? SF has some of the strongest restrictions on short term rentals in the nation. You seem under-informed

08.02.2026 19:56 👍 1 🔁 0 💬 0 📌 0

We’ve built more homes per year since that tax was passed than have gone to market due to Prop M. Truly barely making a dent given how anemic our home construction industry has been.

08.02.2026 19:44 👍 2 🔁 0 💬 1 📌 0

4000 homes. Out of 400,000

Big whoop?

08.02.2026 19:41 👍 2 🔁 0 💬 2 📌 0

The city literally exempted SFH and duplexes in that bill. The income from the bill was projected to be well under $20MM annually even after the full vacancy tax went into effect.

Drop in the bucket. Pretty useless stuff.

08.02.2026 19:36 👍 7 🔁 0 💬 1 📌 0

Have you bothered to look into the breakdown on those vacant residences?

I’m guessing no. Otherwise you’d know the vast majority of those homes are in the process of turning over (between renters or owners). Only ~10k homes are long-term vacant, out of 400+k homes in the city.

08.02.2026 19:24 👍 7 🔁 0 💬 1 📌 0

Resolved! Solid sleuthing btw

07.02.2026 19:02 👍 0 🔁 0 💬 0 📌 0

Not who you would expect

06.02.2026 04:04 👍 1 🔁 0 💬 0 📌 0

Wait they haven’t re-run this on Opus 4.5 or Codex 5.2? That’s a huge miss

30.01.2026 15:43 👍 5 🔁 0 💬 0 📌 0