koehr

@koehr.ing

Programmer, open-source enthusiast and hacker based in Berlin, Germany.

If you have a Bluesky account, you can use mu.social with the same account, with all your connections and content the same. Mu has additional functions like post editing and a configurable news section - and we'll be adding new features all the time.

mu.social

This is an actual line that was added to the official system prompt for Codex for GPT-5.5 by OpenAI. Usually the system prompt is as minimal as possible, so I assume it would otherwise mention goblins a lot. AIs are weird.

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BREAKING: A Closer Look at the King of Planets. 🪐🛰️ NASA has just released a new perspective of Jupiter so sharp it’s almost impossible to comprehend. Those intricate, marble-like swirls aren't just clouds—they are colossal storms, many of which could swallow Earth whole. 🌍🌪️

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So we're back to security through obscurity? Sorry, but this is wrong. Our OSS apps and libs will be more secure thanks to the new models, not less. They are being released to researchers responsibly. Let's help maintainers avoid burnout. Let's fund them. Let's welcome more eyes checking our code.

Bailey Pumfleet @pumfleet (1h ago) post in X:

Open source is dead.

That’s not a statement we ever thought we’d make.

@calcom was built on open source. It shaped our product, our community, and our growth. But the world has changed faster than our principles could keep up.

AI has fundamentally altered the security landscape. What once required time, expertise, and intent can now be automated at scale. Code is no longer just read. It is scanned, mapped, and exploited. Near zero cost.

In that world, transparency becomes exposure. Especially at scale.

After a lot of deliberation, we’ve made the decision to close the core @calcom codebase.