Nicolas Fränkel 🇪🇺🇺🇦🇬🇪

👨‍💻 Developer and architect at https://garm.solutions/  🥑 Developer Advocate  ✍️ Blogger @ https://blog.frankel.ch/  📖 Book author at http://leanpub.com/integrationtest  👀 Toots are searchable

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Last Notes

2026-04-27 17:04:44 UTC

A collection of principles and #patterns that shape #softwaresystems, teams, and decisions.
https://lawsofsoftwareengineering.com/

2026-04-27 14:26:03 UTC

TIL: #Rust unreachable
https://doc.rust-lang.org/std/macro.unreachable.html

2026-04-25 13:04:43 UTC

I Used to Love #Coding. Now I Just #Prompt
https://dev.to/harsh2644/i-used-to-love-coding-now-i-just-prompt-550l

2026-04-17 09:05:32 UTC

A free, #opensource #offline #server you install on any computer. Download the content you want, and it works without internet — forever.
https://www.projectnomad.us/

2026-04-02 17:04:10 UTC

I Read the Leaked #ClaudeCode Source — Here's What I Found
https://victorantos.com/posts/i-read-the-leaked-claude-code-source-heres-what-i-found/
#reverseEngineering

2026-04-02 09:24:07 UTC

Monitor #ClaudeCode Usage With #Grafana
https://braw.dev/blog/2026-03-28-monitor-claude-usage-with-grafana/
#OpenTelemetry

2026-04-01 17:37:49 UTC

Repost
https://blog.frankel.ch/java-geek-weekly/130/

2026-04-01 17:23:12 UTC

It's Java Geek Weekly's publishing day, and it's not an April Fool's joke, honest!
https://blog.frankel.ch/java-geek-weekly/130/

2026-04-01 16:38:20 UTC

It's Java Geek Weekly's publishing day, and it's not an April Fool's joke, honest!
https://blog.frankel.ch/java-geek-weekly/130/

2026-04-01 09:01:59 UTC

Microsoft #Copilot is now injecting #ads into pull requests on #GitHub
https://www.neowin.net/news/microsoft-copilot-is-now-injecting-ads-into-pull-requests-on-github-gitlab/

2026-03-31 17:10:43 UTC

#SpringBoot Done Right: Lessons From a 400-Module Codebase
https://medium.com/all-things-software/spring-boot-done-right-lessons-from-a-400-module-codebase-e636c3c34149

2026-03-31 09:11:06 UTC

Anatomy of the .claude/ folder
https://blog.dailydoseofds.com/p/anatomy-of-the-claude-folder
#Claude

2026-03-30 17:29:40 UTC

#Awesome #Selfhosted
https://github.com/awesome-selfhosted/awesome-selfhosted

2026-03-29 17:27:15 UTC

Leading your organization to use #OpenTelemetry is a challenge. In addition to all the usual project hurdles, you’ll face one of these two situations: convince your teams to use OTEL, or convince them to move from the telemetry tool they are already using to OTEL. Most people don’t want to change. You’ll need lots of effort and baby steps. My tip is the following: the fewer the changes, the higher your chances of success.
https://blog.frankel.ch/tip-opentelemetry-projects/
#Java #JMX #pragmatic

2026-03-29 09:00:25 UTC

From zero to a #RAG system: successes and failures
https://en.andros.dev/blog/aa31d744/from-zero-to-a-rag-system-successes-and-failures/
#LLM

2026-03-28 17:22:04 UTC

The Curious Case of Enum and Map Serialization
https://4comprehension.com/enum-map-serialization/
#java #puzzle

2026-03-28 09:04:46 UTC

Should I Switch From #Git to #Jujutsu
https://etodd.io/2025/10/02/should-i-switch-from-git-to-jujutsu/
#SCM

2026-03-27 17:04:58 UTC

#cq: #StackOverflow for #Agents
https://blog.mozilla.ai/cq-stack-overflow-for-agents/
#LLM #AI

2026-03-27 09:22:14 UTC

#AI #CodingAssistants Haven’t Sped up #Delivery Because #Coding Was Never the Bottleneck
https://www.infoq.com/news/2026/03/agoda-ai-code-bottleneck/

2026-03-26 17:29:29 UTC

#ClaudeCode #CheatSheet
https://cc.storyfox.cz/

2026-03-26 09:06:56 UTC

Semantic Conventions for #GenAI agent and framework #spans
https://opentelemetry.io/docs/specs/semconv/gen-ai/gen-ai-agent-spans/
#OpenTelemetry #LLM

2026-03-25 18:01:03 UTC

Last snow of the season tomorrow 🌨️
Enjoy your evening with the Java Geek Weekly
https://blog.frankel.ch/java-geek-weekly/129/

2026-03-25 09:29:38 UTC

Migrating to the #EU
https://rz01.org/eu-migration/
#DigitalSovereignty

2026-03-24 17:16:13 UTC

Reports of #code's death are greatly exaggerated
https://stevekrouse.com/precision
#programming #coding #codingassistant #AI

2026-03-24 09:04:33 UTC

The Software Essays that Shaped Me
https://refactoringenglish.com/blog/software-essays-that-shaped-me/

2026-03-23 17:10:11 UTC

Bifrost #AI #Gateway
https://github.com/maximhq/bifrost

2026-03-22 18:10:59 UTC

I don’t think it’s necessary to introduce Gregor Hohpe. I’m a big fan, having read Enterprise Integration Patterns, and I’ve recommended the book ever since.
His latest #book is: "The Software Architect Elevator". Here's my #review
https://blog.frankel.ch/software-architect-elevator/

2026-03-22 12:13:16 UTC

Playing with #OpenHands and #Devstral from #MistralAI. I already hit a RateLimitError 429 ☹️ I'm also missing the time I can resume my work. And yes, I have activated the tokens compression settings.
It's not today that I'll be able to evaluate whether it's better than Claude Code or not.

2026-03-22 09:12:42 UTC

What we heard about #Rust's challenges, and how we can address them
https://blog.rust-lang.org/2026/03/20/rust-challenges/

2026-03-21 17:03:01 UTC

GitHub’s Ex-CEO Just Raised $60M to Replace #GitHub (And He Might Be Right)
https://www.towardsdeeplearning.com/githubs-ex-ceo-just-raised-60m-to-replace-github-and-he-might-be-right-680695b14eff?sk=0a510f227dbe5483cc63fc8c05281ad1
#checkpoints #AI

2026-03-21 09:08:31 UTC

#War in #Iran Damages Multiple #AWS Data Centers, Challenging Multi-AZ Assumptions
https://www.infoq.com/news/2026/03/aws-multiaz-conflict-outage/

2026-03-20 17:03:10 UTC

#Leanstral: #OpenSource foundation for trustworthy #vibecoding
https://mistral.ai/news/leanstral
#MistralAI #formalproof

2026-03-20 09:27:15 UTC

How I Introduced a Regression
https://oblac.rs/how-i-introduced-a-regression/
#gleam

2026-03-20 09:11:35 UTC

- reply

@nprofile…3uks 😂😂😂
He was probably threatened with legal actions

2026-03-19 17:49:36 UTC

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@nprofile…3app https://www.towardsdeeplearning.com/githubs-ex-ceo-just-raised-60m-to-replace-github-and-he-might-be-right-680695b14eff?sk=0a510f227dbe5483cc63fc8c05281ad1

2026-03-19 17:20:15 UTC

Reverse-engineering #Viktor and making it #OpenSource
https://matijacniacki.com/blog/openviktor
#Slack #AIAssistant

2026-03-19 09:06:31 UTC

Every layer of #review makes you 10x slower
https://apenwarr.ca/log/20260316

2026-03-14 17:26:07 UTC

#WebPKI and You
https://blog.brycekerley.net/2026/03/08/webpki-and-you.html
#HTTPS #TLS #certificates

2026-03-10 17:00:51 UTC

Neko: A self hosted #virtual #browser that runs in #docker and uses #WebRTC
https://neko.m1k1o.net/
#privacy #security

2026-03-10 09:12:41 UTC

Downgraded #Java to JDK 1.1 After 30 Years… It Was a Disaster
https://www.youtube.com/watch?v=uTQDOXCen0c

2026-03-09 17:16:35 UTC

- reply

@nprofile…pkcv I know neither of them unfortunately

2026-03-09 17:15:17 UTC

#OVHcloud #Kubernetes Review: Europe's Quiet Powerhouse
https://www.eucloudcost.com/blog/ovhcloud-cluster/
#OVH

2026-03-08 18:21:30 UTC

As I age, I become increasingly cautious about my privacy. The slope the world is sliding on is also a big, unfortunate incentive. I have been eying #PiHole for some time: in this post, I want to explain what it does, how to install it on a #RaspberryPi, and how to integrate it with #Tailscale.
https://blog.frankel.ch/pi-hole-tailscale/

2026-03-08 09:06:24 UTC

#ClaudeCode Performance: Unlock Deep #Thinking for Better Results
https://claudefa.st/blog/guide/performance/deep-thinking-techniques

2026-03-05 17:27:38 UTC

OTTL context inference comes to the #Filter Processor
https://opentelemetry.io/blog/2026/ottl-context-inference-come-to-filterprocessor/
#OpenTelemetry

2026-03-05 09:07:21 UTC

#ClaudeCode system prompts
https://platform.claude.com/docs/en/release-notes/system-prompts

2026-03-04 18:08:23 UTC

Enjoy the new edition of the Java Geek Weekly.
Fo' sure! 😎
https://blog.frankel.ch/java-geek-weekly/126/

2026-03-04 13:11:42 UTC

One key takeway from the #ClaudeCode cours I attended: "plan mode" is to "widen" the work, while "ultrathink" is to "deepen" it.

2026-03-04 09:09:47 UTC

Besieged
https://redmonk.com/sogrady/2026/02/10/besieged/
#analysis #AI #codingassistants

2026-03-03 20:42:39 UTC

- reply

@nprofile…2g44 Well, I tried a couple of times, using a pivot format.
It wasn't perfect, and at the end, it took me more time than doing it manually.

2026-03-03 17:22:40 UTC

#Free #Anthropic courses
https://anthropic.skilljar.com/
#ClaudeCode

2026-03-03 17:06:43 UTC

- reply

@nprofile…gjz8 https://anthropic.skilljar.com/claude-code-in-action

2026-03-03 13:19:43 UTC

I start to leverage the true potential of #codingassistants only now. So far, I crossposted my blog posts by first transforming them from #Asciidoc to #Markdown by hand. Feasible, but boring.
I have created a #ClaudeCode command and my life is so much better.

2026-03-03 09:12:18 UTC

The #Token Economy
https://dev.to/dannwaneri/the-token-economy-3cd9

2026-03-02 17:23:35 UTC

After 24 years of building #systems, here are the #architecture mistakes I see startups repeat
https://www.reddit.com/r/softwarearchitecture/comments/1rh4mbf/after_24_years_of_building_systems_here_are_the/

2026-03-02 14:18:18 UTC

When at first look at hooks in the context of #codingassistants, I was not amazed. But today, I watched a video where they implemented a hook that used #ClaudeCode itself 🤯🤯🤯
It opens so many doors I'll need a couple of weeks to think it over.
#NewIdeasComing
https://mastodon.top/system/media_attachments/files/116/160/010/524/147/298/original/90c6b5311561936b.jpeg

2026-03-01 18:08:58 UTC

Ready-to-use virtual clusters
https://blog.frankel.ch/ready-to-use-virtual-clusters/
#kubernetes #devops

2026-03-01 13:43:51 UTC

This week's project has been migrating the #theme of my #blog. I kept the old one too long and I felt like a snake having to shed a new skin. Hope you like it!
#Ghost #Casper #Jekyll
https://mastodon.top/system/media_attachments/files/116/154/212/782/623/627/original/db1add5f15bf7948.png

2026-03-01 09:21:40 UTC

Code Mode: give #agents an entire #API in 1,000 #tokens
https://blog.cloudflare.com/code-mode-mcp/
#Cloudflare

2026-02-28 17:12:52 UTC

Moving beyond Strings in #SpringData
https://spring.io/blog/2026/02/27/moving-beyond-strings-in-spring-data

2026-02-28 13:46:52 UTC

Watching the number of #DevRel job offers crashing down, and the few remaining mostly being located in the US or even more focused on the Bay Area, I'm pretty happy I went back to engineering.
Given the relationship with #conferences, I wonder how the conference landscape will look like in one year

2026-02-28 09:06:15 UTC

Your #AI #codingagent is drowning in noise
https://blog.codemine.be/posts/2026/20260222-be-quiet/

2026-02-27 17:21:41 UTC

The Day a Google L7 Engineer Tore My #SystemDesign to Shreds
https://cloudwithazeem.medium.com/0b3834fded07?sk=2053ca003c75ca37fc300eb1bbb62aa3
#interview

2026-02-27 09:24:00 UTC

Flickr’s #URLs scheme
https://unsung.aresluna.org/unsung-heroes-flickrs-urls-scheme/

2026-02-26 17:10:28 UTC

Anthropic Study: #AI #Coding Assistance Reduces Developer Skill #Mastery by 17%
https://www.infoq.com/news/2026/02/ai-coding-skill-formation/

2026-02-26 09:02:43 UTC

#PasswordManagers less secure than promised
https://ethz.ch/en/news-and-events/eth-news/news/2026/02/password-managers-less-secure-than-promised.html

2026-02-25 17:44:19 UTC

Spring is coming, the Java Geek Weekly too!
https://blog.frankel.ch/java-geek-weekly/125/

2026-02-25 13:30:23 UTC

- reply

@nprofile…jymg my emails are archived, they just don’t appear in the inbox

2026-02-25 13:19:33 UTC

If you know, you know. I don’t remember the last time I managed to achieve this 😎
#zeroInbox
https://mastodon.top/system/media_attachments/files/116/131/467/976/961/243/original/c4ff565ea9a48052.png

2026-02-25 09:05:53 UTC

#Git's Magic Files
https://nesbitt.io/2026/02/05/git-magic-files.html

2026-02-24 17:16:23 UTC

Be Wary of #Bluesky
https://kevinak.se/blog/be-wary-of-bluesky
#atprotocol #decentralization #socialmedia

2026-02-24 09:12:11 UTC

How I Use #ClaudeCode
https://boristane.com/blog/how-i-use-claude-code/

2026-02-23 10:10:00 UTC

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@nprofile…9mmr I notice that you aren't a faithful reader of my blog 😉
https://blog.frankel.ch/teeing-java-api/

2026-02-22 18:33:18 UTC

#JVM timing options
https://blog.frankel.ch/jvm-timing-options/
#Java #timer #stopwatch
https://mastodon.top/system/media_attachments/files/116/115/714/773/289/652/original/adacf5122cdd6dbb.jpeg

2026-02-22 15:16:51 UTC

- reply

@nprofile…5dce happy to be of service!

2026-02-22 14:59:57 UTC

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@nprofile…5dce The only tool I know of that plays the same role is #OpenRewrite https://docs.openrewrite.org/

2026-02-22 09:25:43 UTC

#Java has evolved. Your code can too.
https://javaevolved.github.io/

2026-02-21 17:04:52 UTC

"Made in #EU" - it was harder than I thought.
https://www.coinerella.com/made-in-eu-it-was-harder-than-i-thought/
#Europe #DigitalSovereignty

2026-02-21 13:03:41 UTC

One finished, so many to read.
I guess it's my #pileOfShame
https://mastodon.top/system/media_attachments/files/116/108/756/350/114/062/original/5a1e4652f028bb6c.jpeg

2026-02-21 09:30:01 UTC

#OpenTelemetry Project Publishes “Demystifying OpenTelemetry” Guide to Broaden Observability Adoption
https://www.infoq.com/news/2026/02/opentelemetry-observability/

2026-02-21 06:20:34 UTC

- reply

@nprofile…2e55 there are ways to bypass the paywall 😏

2026-02-20 17:11:49 UTC

Evaluating #AGENTS.md: Are Repository-Level Context Files Helpful for Coding Agents?
https://arxiv.org/abs/2602.11988

2026-02-20 12:24:55 UTC

Working with #LLMs both at work and at home make me reconsider the usual #developer approach to problems.
We should probably let go of reaching for deterministic results and instead become true engineers and implement #DemingWheel: Plan-Do-Check-Act.
#ThoughtOfTheDay #PCDA #DemingCycle
https://mastodon.top/system/media_attachments/files/116/102/941/603/953/376/original/58a8a5d3407093bd.png

2026-02-20 09:23:15 UTC

Junior Devs Use try-catch Everywhere. Senior Devs Use These 4 #Exception Handling Patterns
https://blog.stackademic.com/junior-devs-use-try-catch-everywhere-senior-devs-use-these-4-exception-handling-patterns-dcd869ed6551

2026-02-19 17:12:50 UTC

#Tailscale Peer Relays is now generally available
https://tailscale.com/blog/peer-relays-ga

2026-02-19 09:02:20 UTC

#European alternatives to American apps & software
https://www.eupedia.com/forum/threads/%F0%9F%87%AA%F0%9F%87%BA-european-alternatives-to-american-apps-software.46070/
#sovereignty

2026-02-09 17:25:22 UTC

#StarTrek Comm Badge for #HomeAssistant Voice Control
https://community.home-assistant.io/t/star-trek-comm-badge-for-home-assistant-voice-control/983717
#geek #nerd

2026-02-08 14:50:10 UTC

- reply

@nprofile…jp9q 🤫

2026-02-08 09:17:07 UTC

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@nprofile…rgmf you are more than welcome 🙏

2026-02-08 09:16:02 UTC

#ContextEngineering for #CodingAgents
https://martinfowler.com/articles/exploring-gen-ai/context-engineering-coding-agents.html
#ClaudeCode #LLM

2026-02-06 09:45:40 UTC

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@nprofile…5khs yes, it mostly resonates with my experience. Happy you had another one 🙏

2026-02-06 08:30:23 UTC

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@nprofile…5khs the problem is two-fold: people following advices blindly (cargo culting) and him building his entire career on a book more than 20 years old.
I don’t care about the second, but I have worked with a cultist and the post resonates with my experience-unfortunately

2026-02-05 17:03:16 UTC

The #Cult of #CleanCode
https://dev.to/adamthedeveloper/the-cult-of-clean-code-5a7f
#CargoCulting

2026-02-02 07:08:39 UTC

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@nprofile…sepv yup, pretty much my evolution too

2026-02-01 18:39:33 UTC

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cc @nprofile…s7j7

2026-01-31 17:02:18 UTC

Can you prove #AI #ROI in Software Eng?
https://www.youtube.com/watch?v=JvosMkuNxF8
#softwareengineering #productivity

2026-01-27 11:13:43 UTC

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@nprofile…u4s6 😂😂😂

2026-01-27 09:25:59 UTC

How I Used #AI to #Audit 3 Years of #SmartHome #TechDebt (And Built a System to Prevent It From Happening Again)
https://dan-malone.com/blog/ai-audit-smart-home-tech-debt
#ClaudeCode #HomeAssistant

2026-01-18 18:41:10 UTC

- reply

@nprofile…s7j7 Thanks for the pointer!

2026-01-18 18:26:17 UTC

Checked #exceptions and #lambdas
https://blog.frankel.ch/checked-exceptions-lambdas/
#Java