Cristian Olaru ☕

[Cristian Olaru ☕ @colaru]

Celebrating 30 years of Java at JavaOne 2025 conference.

[Morten Punnerud-Engelstad @m_punnerud]

I build a route optimization engine, 100% in Rust and can run 100% offline. Live demo in browser for San Francisco. Easily calculates 100.000 stops on a laptop https://t.co/MLXPOzf6df (never possible before? And on a laptop). MIT Licence

[Julien Dubois @juliendubois]

Do you wish you knew which SQL query is causing trouble? Did you ever set up p6spy or datasource-proxy? Now it's all automatic, with a nice UI!

Documentation at https://t.co/YZwBt3ZdmU

Here are 2 screenshots!

[Julien Dubois @juliendubois]

Many thanks to @thomaswue for adding GraalVM reachability metadata repository lookup to BootUI!!

➡️ PR at https://t.co/5VopSBXEAe

Here's a nice screenshot, this will be in our next release!

[Julien Dubois @juliendubois]

Spring Boot 4.1.0 was released 15 minutes ago 🚀

Already updating BootUI with it, thanks GitHub for giving us GitHub Copilot, its Auto-merge agent and GitHub Actions ❤️

➡️ Look at the screenshot, no more vulnerability!!!
➡️ PR at https://t.co/xr79JyhbsD

[Spring AI @SpringAICentral]

🚀 Spring AI 2.0.0-RC2 is out and one more step to GA!
✅Configurable HTTP clients for OpenAI & Anthropic
✅ Restored Spring Framework < 7.0.4 compatibility
✅ Multi-turn thinking fixed for Ollama & OpenAI, bug fixes and more on https://t.co/piCrsbrjwS

[Andrej Karpathy @karpathy]

This is a super exciting release - Claude Fable 5 is the same underlying model as Mythos but with added safeguards. The benchmarks are great and it's SOTA on everything by a margin but I'll add that *qualitatively* also, this is a major-version-bump-deserving step change forward (imo of the same order as Claude 4.5 was in November), peaking especially for long problem-solving sessions on very difficult problems. You can give it a lot more ambitious tasks than what you're used to, the model "gets it" and it will just go, and it's never felt this tempting to stop looking at the code at all (but don't do this in prod!). The model still has quirks that people will run into and the safeguards are configured to be a little too trigger happy for launch, which can hopefully be tuned over time.

I feel a lot of things changing as working software increasingly comes out on a tap. The Jevon's paradox kicks in and I feel my own demand for software growing substantially. You can ask for anything - explainers, visualizers, dashboards, bespoke single-use apps (e.g. a full wandb that is hyper-specific just for your project), you can 10X your test suite, auto-optimize code, run giant research projects with custom HTML for the results, anything! "Free your mind" (Matrix ref). Really looking forward to all the things people build!

[Polymarket @Polymarket]

JUST IN: Claude Fable 5 will redirect “high risk” prompts to Opus 4.8.

[Polymarket @Polymarket]

NEW: Claude Fable 5 is only included in paid plans through June 22, after which access will move to usage credits.

[Julien Dubois @juliendubois]

Wow it does have some security filtering!!! First time I see this!
Very cool to see this safety feature working for real (even if here I would have loved to benefit more from the model)

[Bindu Reddy @bindureddy]

The entire engineering team does nothing but interact with AI all day 😅

-~ 100% of the code written by our AI
- all PRs have AI code reviews
- AI routinely writes tests
- AI is in charge of prod pushes

I submit 10-12 PRs for bug fixes and changes every day

[Julien Dubois @juliendubois]

Not 1, but 4 new panels are coming up in the next BootUI https://t.co/ozJQpwafPu release ...

Here they are, put a ❤️ on the ones you prefer ⬇️

[Julien Dubois @juliendubois]

BootUI 0.3.0 is released 🎉

This release focuses on better local Spring Boot 4 diagnostics, JVM tuning, and AI telemetry.

Changelog: https://t.co/aVpWQY8q7Q

Main details below ⬇️

[Uncle Bob Martin @unclebobmartin]

There is no way to get the human out of the loop. The Agents simply do not understand obvious user expectations.

[Shanaka Anslem Perera ⚡ @shanaka86]

JUST IN: Berkshire just bought $10 billion of Alphabet at a discount to Monday’s close.

Buffett spent a decade publicly saying he missed Google.

Greg Abel made the call in his first six months.

The structure is a private placement, adding to a position Berkshire built quietly from Q3 2025 and tripled to roughly $17 billion by Q1. $5 billion in Class A at $351.81 and $5 billion in Class C at $348.20, both below the close. It is part of an $80 billion Alphabet equity raise to fund AI compute. $30 billion in underwritten offerings. $40 billion in an at-the-market program beginning in Q3. And the $10 billion Berkshire anchor.

This is not a portfolio move. This is anchor capital. One of the largest equity raises in tech history needed Buffett’s seat at the table before the rest of the book could clear.

Sit with what that means.

Alphabet did $110 billion in revenue last quarter. Free cash flow was $10 billion. Capex was $36 billion. The 2026 full year guides to $180 to $190 billion in capital spend, roughly double 2025. Even Google cannot self-fund the AI buildout. It is selling itself piece by piece to keep up with the next two years of Nvidia orders.

Yesterday, Berkshire agreed to buy Taylor Morrison for $6.8 billion. A homebuilder. The slowest verification clock in the market.

Today, they anchored Alphabet for $10 billion. The fastest.

In 48 hours, Abel has deployed almost $17 billion across the two opposite ends of the cycle. That is not a sequence of trades. That is a barbell.

Berkshire under Abel is positioning on both sides of the AI capex tsunami. The homebuilder catches the slow demographic shortage of houses that demographics keep widening. The Alphabet anchor catches the fast compute buildout that the same demographics keep paying for. The two positions will outlast whatever cycle hits in between.

There is one more layer. Berkshire took the discount because Alphabet wrote the discount as the price of credibility. Without the name on the round, the dilution story would have hit the stock harder. With it, the public market reads “Berkshire is in” and absorbs the other $70 billion that funds the chip orders.

This is what the AI capex cycle looks like at the top of the stack. Big Tech raises equity. Patient capital takes the discount as the price of underwriting the round. The capex flows into Nvidia. The Nvidia revenue flows into the same special purpose vehicles, private credit pipes, and insurance balance sheets that have been routing residual risk into retirement annuities for months.

Watch the next move. Berkshire still has around $380 billion left.

[amit @amitisinvesting]

Google just opened up the floodgates for the Mag 7 to begin doing ATM offerings.

The Mag 7 used to buy back stock. Now they are dumping shares in the open market.

Why? AI infrastructure.

As long as the capex delivers an ROI, the market may reward it, but it looks like Google feels they have tapped the debt markets enough and now need to visit the equity markets.

They also got Berkshire to buy $10B at $350, showing that Berkshire is supporting the move.

This is incredible to witness...but my question is...will this give the other Mag 7 companies the freedom to do ATM offerings if the market is willing to let them?

This incredible to witness.

$GOOGL $META $AMZN $MSFT

[Julien Dubois @juliendubois]

And BootUI 0.2.0 is released, with tons of new features!

➡️ Changelog is at https://t.co/7bXRMTpXam
🚀 There are now 25 panels, see https://t.co/G53LoSJVey

Don't miss the new application scanners: Architecture scan with ArchUnit, Pentesting, and vulnerability testing!

[Julien Dubois @juliendubois]

Got Claude Opus 4.8 yesterday evening in GitHub Copilot App, I did this simple prompt on my project and I got a nice PR this morning, with 14 clean commits!

Here is the PR: https://t.co/PDqdiMIKul

[Vlad Mihalcea @vlad_mihalcea]

5 years later, I'm not so sure about this.

[Siva @sivalabs]

Boot UI (https://t.co/mzfhfsUbqY) created by @juliendubois is awesome 🚀

Integrated into my Spring Modulith sample (https://t.co/OJ9Fgwwgfv)

[Uncle Bob Martin @unclebobmartin]

As little as five years ago, I publicly stated that self driving cars were not in the imminent future. I was dead wrong about that. I am now a happy owner of a cyber truck, and I let it drive me everywhere I go. I trust it’s tactical skill more than I trust my own. Of course I still supervise it, but it sees more than I do, and its reaction time is much better. All I can offer it is my human ability to be far more strategic than it is.