Innovating on what software collaboration and understanding could be! Ex-Google, Ex-Airbnb
Joined June 2025
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Starting a new open source project with the aim of developing an artifact standard for verifiable system diagrams. Check out some of the demo diagrams principal-ai.github.io/subsy…
Fernando retweeted
Thoughts: just-be.dev/blog/code-review…
Fernando retweeted
I've been working on a new visualisation experience for users in @event_catalog .
With "Levels" you can now decide what view of your diagram you wish to see.
Level 1 - Domains, systems and actors
Level 2 - Services and data
Level 3 - Messages and channels
These new levels can help your teams understand your architecture through different lenses either staying at a high level or diving deeper.
Now live 🙌
Fernando retweeted
We've been working on building trace intelligence across all your company sessions. We're building dimensions of trace data especially relevant to the offices of a CTO, CISO, and CFO. You'll be able to answer things like "how often do files in your codebase show up in agent read operations and how much does it cost" (an example visual below)
This is a fun but gnarly data engineering challenge. But IMO the real story is all the software we are creating along the way. We're building internal tools to evaluate schema choices, we use data from our agent to evaluate the types of queries to optimize for (using Jev and Luna to classify), we build visual profiling tools test query performance throughout. Making software now is so much more fun and interesting.
Anyways, I can't wait to show this stuff off. Your agent trace data contains multitudes and you need many ways to look at it. Also, if this is interesting enough that you might want to run a pilot, please DM!
Fernando retweeted
I spent the majority of my career building observability tooling
this tooling should be used to close the loop between production and coding agents, in service of self-improving software
I put my thoughts down
boristane.com/blog/self-impr…
Fernando retweeted
People ask me how I ship omarchy sw so fast. 🧵
The answer is Clarity.
Clarity is where all my projects live, from the first idea to running live. Every project gets a map, a status, its questions and decisions, a backlog, testing and its GitHub, in one place. Every AI chat I open reads from it before it starts.
Made with Clarity with a buddy of mine, lets call him Daniel, not on X and wont be.
Here's Blip, my iMessage app for Linux, going through it.
Fernando retweeted
👀👀 "[…] we provide several examples of AI mistranslations of natural language (NL) statements and proofs into Lean in practice, resulting in mismatches between NL proofs and their Lean 'verifications'. These include OpenAI's announced Navier-Stokes proof. In particular, we show that the formalised Lean proof does not correspond to the NL proof of blow-up of solutions to the Navier-Stokes equations."
arxiv.org/abs/2610.08144
Fernando retweeted
PR guides are now available in capy and they have made reviewing code so much easier
- overview summary with diagram breakdown
- diffs broken down and sorted into logical sections
- tests and generated files collapsed by default
- moved code detection
Plugins and guided reviews are here!
Capy 0.4.4
• Plugins from the Capy marketplace
• A guide on every reviewed PR
• Custom models on your own key
• Desktop threads without a project
• Fixes and improvements
capy.ai/changelog/0.4.4
Fernando retweeted
This will replace Excalidraw for me. Ferroprint.
Ferroprint after the ferroprussiate process that made the first blueprints
Fernando retweeted
I built Petal, a free, open-source disk-space explorer for macOS.
The chart draws itself while it scans. It flags what's safe to delete (Xcode builds, node_modules, caches) and tells you exactly what deleting frees.
Rust + GPUI. Inspired by the recent syntax.fm episode.
github.com/henrydennis/petal
Talks like this are important for maintaining a level head about progress in software development youtu.be/F8fBgDCf2Y4?is=T-ri… via @YouTube
Fernando retweeted
maybe don't ship 2k+ file PRs
But if you do, let the PR explain itself
Try it here: github.com/coldteadotai/pr-l…
Fernando retweeted
If you get bored drawing architecture diagrams, you can now spawn a rider and drive around your diagram.
Draw and press SHIFT + R on koboyo.com
Fernando retweeted
Software factories are an anti pattern. Agents are incredibly useful but you must still be deeply engaged to build a great product.
Fernando retweeted
had a crazy idea today
for the past two months i've been building a pretty massive app
and truth be told, i often play catch-up on architecture, because features move so damn fast
so today i asked claude (opus 5.5, high)
"I have a weird task for you. I want you to look at the app and create, for lack of a better word, a canvas that I can zoom in and zoom out and move around to see how our architecture actually works."
(full prompt in first comment)
this came out pretty great and it truly visualized, with steps and connected graphs what everything does
10/10 would recommend