Calvin Grunewald

Founder. Ex-Stripe, Ex-Facebook Engineering Leadership. Building agentic platforms for the future of communication.

[GeekWire @geekwire]

Meet ArchAstro: Ex-Stripe, Microsoft and Meta vets assemble powerhouse team for cross-company AI agents https://t.co/9XdEXfJl3U

[Calvin Grunewald @CalvinGrunewald]

@patrickc We have a lot of the pieces of this over at https://t.co/zgb7yFm9o0 . I’ll use this as input for our next batch of workflow features!

[Calvin Grunewald @CalvinGrunewald]

Happy 6/7 day to all you parents of Gen Alphas.

[Calvin Grunewald @CalvinGrunewald]

@kunchenguid This all comes down to whether you believe models will be commoditized or not.

[Calvin Grunewald @CalvinGrunewald]

@kunchenguid @karpathy Congrats Kun! I will have to give it a try!

[Calvin Grunewald @CalvinGrunewald]

Opus 4.7. Let's go!!

[Calvin Grunewald @CalvinGrunewald]

@systemdesignone M5 Max, 128GB - only thing that seems to not get destroyed with my AI workflow. Constantly running out of RAM on other machines.

[Calvin Grunewald @CalvinGrunewald]

Start with the PR description to understand problem/intent. Then, I mostly focus on module design and abstractions. Good abstractions should help you review the code without knowing much about the rest of the system. Bad abstractions/lack of abstractions make this impossible. So my number one reason for requesting changes for AI gen’d PRs is bad abstractions and lack of design. Separately, I also find tests helpful to review to understand what is going on.

[Calvin Grunewald @CalvinGrunewald]

Me: Codex, fix the dialyzer issues.
Codex: [Adds .@dialyzer :no_match]
Me: Sigh

[Calvin Grunewald @CalvinGrunewald]

@romxdev Just 1 with a good layout manager to have many virtual screens with easy key bindings.

[Calvin Grunewald @CalvinGrunewald]

@CodeWithAmann I learned C++ from Accelerated C++ by Addison Wesley - so I guess books?

[Calvin Grunewald @CalvinGrunewald]

@ashoKumar89 AI abstracts a lot of the complexity away. It’s still there, but much more manageable.

[Calvin Grunewald @CalvinGrunewald]

Just saw the new Mario Galaxy movie with my daughter. We loved it. Every moment of it was a throwback to my childhood spent playing Nintendo games. So many delightful surprises sprinkled throughout.

[Calvin Grunewald @CalvinGrunewald]

@KaiXCreator This is literally the best time to build. You can get an amazing amount done with a small cracked team. And the moat was and will always be more than the software itself (ecosystem, disribution, partnerships, solving super hard problems no one else is solving).

[Calvin Grunewald @CalvinGrunewald]

@bluewmist Better on what metric? And is that the right metric?

[Calvin Grunewald @CalvinGrunewald]

@vivoplt That “profit gap” ideally pays for great judgement and ability to maximize use of the tools while producing quality work. The best devs I know that now write 90%+ of their code with these tools would happily admit that. But that’s the minority..

[Calvin Grunewald @CalvinGrunewald]

Great article. My startup has a pretty simple knowledge system right now - RAG + BM25. Been doing a lot of reading on KGs and how Indexed based retrieval outperform RAG. But after reading this, it seems like the a framework for knowledge systems is:

1. Design semantic memory representation and retrieval
2. Design the full storage solution for raw memory data and retrieval
3. Design the system that uses the latter to verify and potentially augment the former

? Any tips on the design space for these?

[Calvin Grunewald @CalvinGrunewald]

Felt the same way till we decided to sell a house in a price range where others down the street were sitting for months and months. We got our desired price in 2 weeks thanks to the experience of the realtor. Totally worth their percentage thanks to experience and marketing skills. I’m sure there is a ton of variance here, but when you get a good agent, they can be worth.

[Calvin Grunewald @CalvinGrunewald]

@GenAI_is_real These subs are still an incredible deal. I’m surprised price hiking hasn’t been more aggressive.