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How does this differ to Mastra?

Mastra is a business, this seems to be a helpful lib

One big difference seems to be Mastra has tests and this project doesn't.

As the entire planet now knows, the Claude Code source leaked on March 31.

The engineering-focused findings have been covered extensively (fake tool injection, Undercover Mode, KAIROS, etc).

This piece focuses on what these findings mean if you're using Claude Code to build AI systems subject to the EU AI Act.

TL;DR / spoiler:

Claude Code isn't a high-risk AI system in and of itself.

The EU AI Act regulates your deployed system and your process, not your tool vendor's internal engineering practices.


How does this differ to Open Code Desktop?


This doesn't support Linux where Open Code does.


Open Code has been the backbone of our entire operation (we used Claude Code before it, and Cursor before that).

Hugely grateful for what they do.


What caused the switch? Also, are you still trying to use Claude models in OpenCode?


Sorry, I missed part of your question:

What caused the switch was that we're building AI solutions for sometimes price-conscious customers, so I was already familiar with the pattern of "Use a superior model for setting a standard, then fine-tuning a cheaper one to do that same work".

So I brought that into my own workflows (kind of) by using Opus 4.6 to do detailed planning and one 'exemplar' execution (with 'over documentation' of the choices), then after that, use Opus 4.6 only for planning, then "throw a load of MiniMax M2.5s at the problem".

They tend to do 90% of the job well, then I sometimes do a final pass with Opus 4.6 again to mop up any issues, this saves me a lot of tokens/money.

This pattern wasn't possible with Claude Code, thus my move to Open Code.


You can access anthropic models with subscription pricing via a copilot license.


Pretty sure that's against TOS.

Edit: it's not. https://github.blog/changelog/2026-01-16-github-copilot-now-...

They must be eating insane amounts of $$$ for this. I wouldn't expect it to last


No, Claude on GitHub Copilot is billed at 3X the usage rate of the other models e.g. GPT-5.4 and you get an extremely truncated context window.

See https://models.dev for a comparison against the normal "vanilla" API.


Yes I regularly plan in Opus 4.6 and execute in “lesser” models ie MiniMax


I agree.

In my experience, this correlates more with soft skills and “one man band” founder/maker companies that tend to sell training products or (if they do exist in a company environment at all) invariably work in DevRel and aren’t pushing code.


The whole point is to reinforce the track record of someone applying to said founding engineering role which you can look up what they have presented and see how well they answer questions from the audience which are soft skills applicable in founding engineer / CTO / senior roles which goes beyond AI-generated CVs or cover letters.

This can be found all the time, from many tech talks or conferences large or small and 99% of the time, the person presenting already covers most of the requirements and makes the selection process easier, not harder.

One part I did miss in my post was to require at least 2 out of 3 of them so, I added that in. But I'd rather optimize for hiring candidates who are builders and know what they are talking and what to build even with AI and can easily answer deep technical questions (because they have experience and have done it), than those studying for the interview and need constant hand-holding and are over-reliant on AI.

Remember, this is for recruiting founding engineers and the bar has to be high way above the noise.


Thank you — Excellent points. Will think about them.


Follow what Nick Clegg has been saying post-Meta. He might give a big clue.


.. do you think you could quote it here to save time please?


"But there is an obvious solution: mandate the operating systems (iOS and Android) to share device users' ages when they download apps from the app stores – data the operating systems get as part of the hardware acquisition already. This would be a simple one-step way for parents to control all the different apps that their kids use (in the US, the average teen uses forty different apps per month) and would remedy the fractured app-by-app approach we have today. We should make a societal judgement about whether to set these age limits for smartphones or social media use at thirteen, fourteen, fifteen or sixteen, then write it into law." in How to Save the Internet by Nick Clegg


Everything else aside, this naive belief system is right up there with "10 Myths every programmer should know about X" where X is email addresses, legal names, postal addresses, dates, timestamps, etc.

Or perhaps they are envisioning a "hardware acquisition" process where the purchaser is forced to take some oath and sign an attestation about all future users of the device...


I don’t think it’s that.

I think it’s more about setting a norm and precedent that “Age verification is not our responsibility; the App Store layer does that and it’s an established truth now”.

Which itself conveniently helps as a defence in lawsuits when a teenager kills themselves over harmful content etc.


Luckily Facebook has a web site, so it can be used without downloading an app.


Obviously, the device will share the age with the browser app.



Impressive! Well done


Respectfully, this is not really engaging withe content of the post.


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