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Posts by Brad Gessler

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Enclave An MRuby sandbox for running arbitrary Ruby code from LLMs

mruby 🤝 Ruby

In my ongoing exploration of non-deterministic agents running along side deterministic code, I figured I'd see if I could use RubyLLM to run arbitrary ruby code inside of an mruby sandbox within the same process.

It works!

beautifulruby.com/code/enclave

1 month ago 12 1 1 0

Should take a week, give or take 3 months.

1 month ago 2 0 0 0

Try it. See what happens.

1 month ago 0 0 0 0

How is that a negative? They’re text files.

1 month ago 1 0 1 0
ThinkingScript
ThinkingScript YouTube video by Terminalwire․com

Video demo at youtu.be/IxsmI8ajL50?... if you’re not into installing stuff without seeing it working.

The script runs inside a JS sandbox that can only access things you approve.

1 month ago 1 0 0 0
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Self-improving AI Executables Write programs in your own words. Run them in a secure sandbox. Install them like any other tool.

Running AI agents as Unix executables that self-improve has been one of my wilder ideas lately.

You can pipe agents: `think weather | think song`

The agent eventually writes a determinative script after enough runs for simple programs.

It’s as secure as a browser too.

thinkingscript.com

1 month ago 18 4 2 0

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1 month ago 1 0 0 0
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YCombinator.com Open Graph analysis: solutions to common problems with image sizes
YCombinator.com Open Graph analysis: solutions to common problems with image sizes YouTube video by OpenGraph+

Incorrectly sized Open Graph images commonly crop heads & logos in weird places.

In this video I debug YC's redesigned site with og.plus/tools to show how to identify & fix incorrectly sized images.

Of course sites that use og.plus don't have this problem because images are optimized per network.

2 months ago 1 0 0 0
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GitHub - rubymonolith/fixturebot: The speed of fixtures with the syntactic sugar of factories. The speed of fixtures with the syntactic sugar of factories. - rubymonolith/fixturebot

I saw it, but the README was sprawling and I wasn't confident that it would do as little as possible during runtime.

Now that a few people have asked, I put a section in the README about it under "Prior art".

github.com/rubymonolith...

2 months ago 1 0 1 0
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Don't throw the specs out with the factories FixtureBot gives you the speed of fixtures with the syntax of factories

I got tired of seeing people complain “RSpec and factories takes 14 min to run, minitest and takes 5s” so I’m starting to chip away at it.

First order of business: created FixtureBot after figuring out I use FactoryBot not because of factories, but because I like the syntax.

Might try sus next.

2 months ago 12 1 2 0
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Superfeature Plan A Ruby DSL for defining SaaS pricing plans and features

Second edition of creating Plan objects in Superfeature to display plan tables in a SaaS I’m working on, og.plus.

The objects can upgrade to other plans, control downgrade flow, set prices in stripe, require payment, and more.

Next one I’ll cover Feature & Limit classes.

2 months ago 2 0 0 0
OpenGraph+ macOS app demo: debug your tags live
OpenGraph+ macOS app demo: debug your tags live YouTube video by OpenGraph+

First YouTube video for OpenGraph+ about a macOS app I'm building to design and debug Open Graph images.

Still waiting on Apple to approve the thing in Test Flight.

2 months ago 0 0 0 0
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Superfeature Price A Ruby object for working with prices and discounts

While working on OpenGraphPlus.com I got tired of how annoying it is working with full prices and discounts, particularly in views, so I created a gem with a Price object that makes it super easy to create discounts and have them display properly on your site.

Next Black Friday will be easy! 😅

2 months ago 2 0 0 0
How the OpenGraph+ Rails app uses OpenGraph+ to render Open Graph tags for itself
How the OpenGraph+ Rails app uses OpenGraph+ to render Open Graph tags for itself YouTube video by BeautifulRuby․com

My first end-to-end demo of og.plus!

You can finally get a sense for how it will integrate into websites to generate an Open Graph image per page, and you can control it all with CSS, meta tags, and HTML cache headers.

As always, Rails is my first integration: opengraphplus.com/docs/rails

💅

2 months ago 3 0 0 0
How I used Claude Code to build OpenGraph+, a Rails Open Graph generator
How I used Claude Code to build OpenGraph+, a Rails Open Graph generator YouTube video by BeautifulRuby․com

I've been heads down for the past month cranking on og.plus, and for the first time ever I found LLMs were actually useful for creating production-grade apps, but not how you think ... and a far cry from "vibe coding".

I share thoughts in the video & discuss the workflow I used to ship quality.

2 months ago 3 1 0 0
Critique landing pages with ChatGPT Atlas
Critique landing pages with ChatGPT Atlas YouTube video by BeautifulRuby․com

I've started using ChatGPT's Atlas browser to critique first-draft landing pages to find obvious errors and issues on og.plus.

Overall I've found its useful to map out "completeness", but it will try to make you run in circles, is kinda slow, and requires copy & paste to work with other agents.

2 months ago 2 0 0 0
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Ironically the Girl Scout website has a cookie banner on their cookie website 🤣

Flavors at www.girlscouts.org/en/cookies/c...

You’ll buy the course, I’ll email you, you pick what flavors you want for your 4 boxes, give me your address, and then you’ll have some cookies and Phlex 💪

2 months ago 0 0 0 0
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Girl Scouts on Rails: Walk & Talk
Girl Scouts on Rails: Walk & Talk YouTube video by BeautifulRuby․com

Girl Scout cookies and Phlex on Rails!?

I'm sending people 4 boxes to any address in the US (can't ship i18n 🫠) for people who buy the course at beautifulruby.com/phlex

After you purchase, I'll reach out to get your address & cookie preferences (real cookies 🍪, not browser cookies)

2 months ago 5 2 1 0
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Inheritance This video course teaches you how to use Phlex to build high quality Rails frontends that you can use with existing Erb apps or go all-in and build from the ground up with components. Phlex brings san...

Phree Phlex videos are back! This one shows how to cram lots of Phlex components into one file with nested classes and endless method.

I also kept the Black Friday deal going for a couple more days.

3 months ago 2 1 0 0

I ditched the 10 minute time-box for the videos so I wouldn’t have to be as rushed.

4 months ago 2 1 0 0

Hotwire counts. Adding to list!

4 months ago 1 0 0 0
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2025 Ruby Cyber Monday & Black Friday Deals Save money on Ruby books, courses, licenses, & software

Last Ruby deals push, this time for Cyber Monday!

I picked up a few more deals and listed them at the bottom of Friday’s list.

There’s some great deals on software & lots of discounted courses if you have some training budget left in the tank this year.

beautifulruby.com/articles/rub...

4 months ago 4 1 0 0

100% discount? What’s the normal price?

4 months ago 1 0 1 0

Gearing up for one last push on Cyber Monday! I picked up a few more deals that I put on the page. If there's any more please LMK today so I can include in my final Ruby deal push.

4 months ago 1 0 1 0

Time to open a bakery. Is the brown stuff cinnamon sugar? Looks delicious.

4 months ago 0 0 1 0
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2025 Ruby Black Friday Deals Save money on Ruby books, courses, and software

I collected all Ruby Black Friday deals I could find & posted them in one spot. Highlights include:

$130 off @beautifulruby.com Phlex on Rails course

$81 off @gorails.com annual subscription

+20% @joemasilotti.com Hotwire native content

Lots of @pragprog.com deals

Enjoy! 🦃🔥💰

4 months ago 12 7 1 1

I was surprised at how few talks I got to sit down and watch. Also looking forward to watching the videos.

4 months ago 0 0 1 0

I've got a few more in the queue from the SF Ruby Conf.

I'm definitely going to be shooting more of these in different locations with other Rubyists and people who are building cool stuff.

4 months ago 3 0 0 0

Did customs accept the Ruby passports?

4 months ago 3 0 1 0

I’m there Tuesday through Friday.

4 months ago 1 0 0 0