This is the article about lenses I wish I had when I first wrote a formula engine. It gets into the details of representing nested data paths in a form that can support a configuration-driven access layer. www.claudiu-ivan.com/writing/data...

Composable Data Access with Lenses | Claudiu Ivan

Reusable and testable nested updates for TypeScript objects.

claudiu-ivan.com

It feels somewhat strange for an open source project with a single contributor to have a presentation video. One of those things that's possible now.

Claudiu Ivan@claudiu-ivan.com · 6mo ago

Aperture v0.1.9 is live and it adds dependent batch workflows. Capture values from one operation, interpolate them into the next. Chain API calls without writing glue code. Also: --auto-paginate, --body-file for large payloads, and binary size down to < 6 MB.

GitHub - kioku/aperture: Dynamic CLI generator for OpenAPI specifications designed for AI agents and automation

Dynamic CLI generator for OpenAPI specifications designed for AI agents and automation - kioku/aperture

github.com

It is truly disheartening to see my RSS reader being slowly inundated with Claude’s voice…

If a process depends on a specific person’s willpower, then it’s not a process. I go into my view on the topic of release cadence and how to systemize it in my new post. claudiu-ivan.com/writing/rele...

Release Cadence and the Slowest Feature Trap | Claudiu Ivan

Why milestone-based releases silently kill delivery velocity, and how decoupling internal development cadence from client acceptance timelines fixes it.

claudiu-ivan.com

The second edition of Designing Data-Intensive Applications, by myself and @chris.blue, is finished and sent off to the printers! Ebooks should be available in the next week, and print books in 3–4 weeks. Sigh of relief. 😅 (BTW, this is a good opportunity to support your favourite local bookshop!)

Aperture v0.1.8 is live and it adds command mappings. Rename operations, add aliases, hide endpoints. Make any OpenAPI spec feel like your own CLI. Also: Nix flake, debug logging, and security hardening. github.com/kioku/aperture

GitHub - kioku/aperture: Dynamic CLI generator for OpenAPI specifications designed for AI agents and automation

Dynamic CLI generator for OpenAPI specifications designed for AI agents and automation - kioku/aperture

github.com

When I heard Mario Draghi say, “what began in fear must continue in hope,” I realized that we Europeans are in desperate need of a common purpose. EU has always been a construction driven more by reason than by passion, born out of the need for peace and economic prosperity after two world wars.1/5

Aperture v0.1.7 adds automatic retry with exponential backoff. It respects Retry-After headers, uses jitter, only retries idempotent methods by default. Also: config management commands, quiet mode for clean pipelines, and now on Homebrew. brew install kioku/tap/aperture github.com/kioku/aperture

GitHub - kioku/aperture: Dynamic CLI generator for OpenAPI specifications designed for AI agents and automation

Dynamic CLI generator for OpenAPI specifications designed for AI agents and automation - kioku/aperture

github.com

TypeScript's type system is compile-time only. Exceptions ignore it. Nullable returns work if someone downstream remembers to check. Wrote about making error handling explicit so the compiler catches it instead of production.

TypeScript's type system is compile-time only. Exceptions ignore it. Nullable returns technically participate, but only if someone downstream remembers to check (not at 4pm on a Thursday, after the third meeting). There's a reason engineers keep rediscovering Result types.

Think → Act → Observe → Repeat.

TypeScript error handling approaches in the wild: - exceptions (sometimes caught) - nullable returns (sometimes checked) - result types - hoping for the best

Solid reasoning.

Sometimes the genie is amazing. Other times, it forgets to checkout a feature branch and doesn't understand why it can't create a pull request...

Agent sandboxes are quite cool. Today I migrated a Django CMS website I've been maintaining for a decade to an Astro static site. From my phone. While enjoying life.

It’s also time to build European solutions. Diverse options will push the international market to offer better products and services for consumers.

🛒 🇪🇺 Buy European 🇪🇺 (+🇨🇦). USA broke up with you. Get over it 🇪🇺💪@buyeuropean.eurosky.social · 8mo ago

It’s time to become digitally independent from USA. Ask not what European #DigitalSovereignty can do for you, ask what YOU can do for 🇪🇺 #DigitalSovereignty. An appeaser is one who feeds a crocodile, hoping it will eat him last. Don’t be a digital appeaser. www.irishtimes.com/world/us/202...

Just shipped Aperture v0.1.5! Managed to cut 7.4MB of binary bloat. Down to 3.6MB now. Turns your OpenAPI specs into native CLI tools. Built for agents and automation. github.com/kioku/aperture

GitHub - kioku/aperture: Dynamic CLI generator for OpenAPI specifications designed for AI agents and automation

Dynamic CLI generator for OpenAPI specifications designed for AI agents and automation - kioku/aperture

github.com

With software, good taste sometimes is just knowing when a function should be longer.

In my work with agent-assisted workflows, I hit a roadblock: giving agents a secure and reliable way to make external API calls. It quickly became clear that this is non-trivial.

The language necessary to describe the phenomena occurring inside LLMs is lacking, so the default is anthropomorphization. addxorrol.blogspot.com/2025/07/a-no...

Quitting programming as a career right now because of LLMs would be like quitting carpentry as a career thanks to the invention of the table saw.

The number of added lines of code is a terrible performance metric. Instead, the total number could be considered a complexity metric, but even that fails when the code is verbose enough.

It’s a fascinating leap. Right now, it seems that my most important task when running an agentic workflow is to keep the output of a stochastic process on a deterministic path.

Martin Fowler@martinfowler.com · last yr.

NEW POST Gen AI for software development is the biggest jump up in abstraction since assembler to HLLs, but also a jump sideways. martinfowler.com/articles/202...

A new report by the @kiel.institute shows that in March and April 2025, Europe surpassed the United States in the total value of military aid provided to Ukraine, for the first time since June 2022. 🇺🇦🇪🇺 🧵

Ukraine Support: Europe largely fills the US aid withdrawal, lead by the Nordics and the UK

Aid flows to Ukraine shifted significantly in March and April 2025. While the United States allocated no new aid during this period, European countries increased their support. As a result, Europe has...

ifw-kiel.de

I have a new article out. It's about a better technique to create grainy gradients, without the big problem that layering a noise layer brings: altering the original gradient palette (to a greater or lesser extent, depending on the approach used). #CSS #SVG #filter

Master.dev (Formerly Frontend Masters)@frontendmasters.com · last yr.

Grainy Gradients This is about reducing banding effects in gradients by introducing noise. A nice approach is a displacement map using SVG filters.

Working with LLM agents is making me think about the old saying: 'be careful what you wish for'

Funny, not funny.

Romania chose decency over dishonesty. A lot of hardships lie ahead, but right now it seems like we’ll make it.

Claudiu Ivan@claudiu-ivan.com · last yr.

The lead that the Romanian populist candidate has isn’t small, but he keeps making stupid mistakes, as you would expect from someone with the personality fit for an autocrat. These mistakes, and the work done by good-natured people, are what will change the tide.