Darin Cassler

Making computers do neato internet magic since ‘99.

[Darin Cassler @cassler]

No big deal, just the federal government publishing infra credentials in plain text in public. The ellipses make me pretty sure this is just vibe code. Gross.

[Darin Cassler @cassler]

@mitsuhiko Can I interest you in a toolkit of scripts and commands with this thinking in mind? https://t.co/bf7543UTYH

[Nozz @NoahEpstein_]

Just leaked 110+ plug-and-play n8n templates that multiple industries are paying me $10K+ for.

Your weekend project: Pick any industry, copy-paste a workflow, start printing money.

The vault includes:
- Real estate lead machines (sold to 2 companies)
- Automotive inventory bots
- YouTube-to-TikTok content farms
- E-commerce customer journey automations
- SDR agents that close without you
- Healthcare patient follow-ups
- Legal document processors
- Social media engagement bots

From study agents (because fuck school) to manufacturing systems - every industry that prints money is covered.

The difference: These aren't broken templates with outdated nodes. They're battle-tested, profitable, and actually work in 2025.

Half sold for serious cash. Half are experiments that became goldmines. All are ready to deploy.

Follow, RT + Comment "vault" and I'll drop the entire collection before my accountant kills me for giving away the farm.

(Sorry to every consultant charging $10K for basic automations)

[Darin Cassler @cassler]

@NoahEpstein_ Vault

[Omar Khattab @lateinteraction]

After ~6 years of building these types of architectures (starting with BERT, eg see Baleen), I think calling these multi-agent systems is a distraction.

This is just software. Happens to be AI software.

It doesn’t seem so complicated once you internalize it’s just a program.

[cat @_catwu]

New in Claude Code: Plan mode.

Review implementation plans before making changes. Perfect for complex changes where you want to nail the approach before diving in.

[Darin Cassler @cassler]

@AstorAaron It’s not just a tactical decision, it’s a message. A deeply partisan one. It telegraphs that dissent will be met with force, while loyalty earns protection or indifference. That’s not governance; that’s retribution.

[Darin Cassler @cassler]

@AstorAaron And if the redlined exceptions are rural and conservative, the full brunt of that enforcement necessarily shifts to the most visible, accessible, and surveilled areas: cities, transit hubs, hospitals, schools, shelters. Public space becomes a trap.

[Darin Cassler @cassler]

@kevinkern Here ya go https://t.co/bf7543UTYH

[Luca Beurer-Kellner @lbeurerkellner]

😈 BEWARE: Claude 4 + GitHub MCP will leak your private GitHub repositories, no questions asked.

We discovered a new attack on agents using GitHub’s official MCP server, which can be exploited by attackers to access your private repositories.

creds to @marco_milanta

(1/n) 👇

[Darin Cassler @cassler]

@bryanhelmig @OpenAIDevs @zapier Well, this was right on time... https://t.co/Ro3UBM5J1O

[Soren Iverson @soren_iverson]

Slack feature to require a response by a certain time or get fired

[Santiago @svpino]

Software estimates are one of the oldest lies we tell ourselves.

We all know they don't work, but pretend they mean something and later feel enraged when shit hits the fan.

I focused a big part of my undergrad on software estimation.

After graduating, I wrote plenty about the topic.

Then, I started working for a company where I spent years researching how to make better estimates. We sold multiple millions of dollars of software using the tools I built.

I read everything there's to read. I could recite Steve McConnel's "Software Estimation" book from top to bottom.

Here is the most important lesson I learned:

People can't estimate software. It doesn't matter who they are or how much experience they have.

Estimating software reliably is science fiction.

And the best part:

They will ask you to estimate something. They will tell you they understand it's not exact. They will promise they won't hold you accountable.

And then they will. They always do.

There are two solutions for this. Let's start with my recommendations for those who don't have a choice:

1. Remove "quick," "simple," "straightforward," "easy," and every similar word from your dictionary. Never use them. Don't let others use them when referring to your work.

2. Never volunteer an estimate. Everything you say will be used against you.

3. When forced, estimate work you know you can complete today. Always estimate with a range: "It will take me 2 - 4 hours."

4. Estimate anything you won't do today in days and weeks. Say, "I should finish that feature sometime this week." Do not estimate future work in hours.

But we all know your manager will force you to give an estimate. Here is what you should do:

1. Estimate how long you think it will take you to complete the task.

2. Multiply the number by 3. This will be the lower range of your estimate.

3. Double the lower range of the estimate. This will be the upper range.

Example: If you think something will take you 1 day of work, say "between 3 and 6 days."

Here is the funny part:

It won't take you between 3 - 6 days. This is as much bullshit as any other method you can think of.

The true solution for this problem:

Work for a company that doesn't care about estimates.

[Fireship @fireship_dev]

I literally told people NOT to star this repo, wtf

[jhey ʕ•ᴥ•ʔ @jh3yy]

CSS Tip! ✨

You can create icon sprite animations using the steps() animation-timing function 🤙

You could use this to create little icon button animations, etc. 😎

But how do you do it? Like this 👇

button img {
object-fit: cover;
object-position: 0 0;
}

The image is a sprite strip of the frames in the animation. To animate the frames, you do something like this:

[aria-pressed=true] img {
animation: play 0.5s steps(20) forwards;
}

@ keyframes play {
to {
object-position: 100% 0;
}
}

We are toggling aria-pressed in our scripts to show a pressed state and we can then fire the animation to play our sprite 🎉

Check out the video that breaks things down a little bit

@CodePen link blow! 👇

[Darin Cassler @cassler]

@Madisonkanna Full stack developers: I replaced all my coworkers by accident.

[Darin Cassler @cassler]

Came back to say that iOS needs a setting for “allow notifications for 1 hour after using app”. Yes, I want to know my food is here. No, I don’t want constant ads mainlined into my prefrontal cortex the other 29 days of the month. @AppleSupport

[Darin Cassler @cassler]

So much for asking it business advice

[Ben Levinstein @ben_levinstein]

Somehow missed this the first time I looked, but GPT-4 got *significantly worse* at microeconomics after it was trained to tell you what you want to hear.