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Posts by David Tanzer

Event Sourcing Explained using Football ⚽
Event Sourcing Explained using Football ⚽ YouTube video by Metaphorically Speaking

You can rebuild state from events.
But you can't rebuild events from state.

Think about football. If you see 2-1 on a scoreboard, you know the current score, but not how it got there.

That's the problem Event Sourcing solves:
www.youtube.com/watch?v=xPmQ...

11 hours ago 7 6 1 0

Für alle Nicht-Österreicher_innen:
Der mächtigste Medienmann Österreichs, der Chef des ORF, tritt quasi über Nacht zurück. MeToo-Fall.
Er wurde mit Chats an eine Mitarbeiterin konfrontiert. Sogleich geht er in die Opfer-Rolle: er wurde vom Aufsichtsrat gezwungen, alles sehr gemein.
Aber

12 hours ago 874 264 26 9

Labor-Diamanten sind physikalisch und chemisch identisch mit Diamanten aus der Mine. Selbst ExpertInnen können sie nicht unterscheiden. Labordiamanten sind viel billiger, Minen-Diamanten werden oft unter furchtbaren Bedingungen abgebaut. Warum entscheidet sich irgendjemand für die Minen-Variante?

1 day ago 701 94 78 3

I haven't used very many LLMs for very much, but every single time that I've used one to look up some details about something I already know... it's wrong! It's incorrect about basic facts every single time I've used one... _every_time_

I absolutely do NOT trust it for the things I don't know.

5 days ago 36 5 4 1
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hmm nicht e-bikes sind offensichtlich sehr schwer zu verkaufen :( falls wer ein hübsches gravel braucht, ich hätt da eins... 2020, ca 6300km, super Zustand

5 days ago 3 5 3 1

Aber wir sehen: Wir haben uns hier in eine Abhängigkeit begeben, für die es chemisch oder physikalisch überhaupt keine Notwendigkeit gibt. Nein, wir brauchen kein Erdöl um Gemüse wachsen zu lassen. Dass Erdöl dabei heute eine Rolle spielt, ist eine Dummheit, die wir dringend reparieren sollten.

1 week ago 591 87 11 0

Microsoft drove me away from Windows (to #Linux) by adding Copilot (and also ads) everywhere 1.5 years ago. I mean, that was the final nail in the coffin. And back then, it wasn't even *that* bad yet. I can't imagine how bad it must be now...

Haven't looked back, I'm glad I switched.

1 week ago 0 0 0 0

Die USA haben mit der Iran-Aktion einfach nur Chaos erzeugt und nicht irgendetwas erreicht. Das Regime ist radikaler als je zuvor, die Menschen leiden mehr als je zuvor, werden hingerichtet und von Bomben erschlagen. Die Weltwirtschaft ist hinüber.

Aber hey cool, danke an die "Weltpolizei".

1 week ago 73 11 7 0
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Please welcome our first sponsor for this year: @dynatrace.com

Our sponsors make it possible to provide great service (Food, Drinks, Location, ...) while still keeping the ticket price reasonable.

So, did you already get your ticket? No? Then what are you waiting for?
socrates-conference.at

1 week ago 1 1 0 0
Subscribe to Arcmutate Subscribe to arcmutate

For a limited time only, we're offering a new flat rate pricing tier for new startups.

Just $15 for industrial strength mutation testing for teams of up to 5 developers.

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#java #kotlin

1 week ago 0 1 0 0

Scotty sagt 6:30 als schnellste verbindung, aber die gibt's nur 1x am Tag, was nicht sehr hilfreich ist...

1 week ago 0 0 0 0

Raus aus Öl, raus aus Gas. Dabei keine individuellen „wer es sich leisten kann super, wer nicht bleibt über-Strategien, die nur am Preis drehen. Übergewinne abschöpfen und in ÖPNV, E-Mobilität, Wärmepumpen, Fernverkehrzüge investieren.

1 week ago 2166 439 28 15

Journalism has a particular responsibility here. Don’t frame democratic erosion as spectacle. Don’t treat fascism as just another position. Don't read strategy into every delusion. Don’t rewrite crisis into normality after the damage is done. Call things out for what they are. That's your job.

1 week ago 24 10 0 0
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Lately, I see a lot of posts saying we need a robust suite of automated tests to ensure AI agents produce high-quality results.

Please keep in mind that one cannot test quality into a software product. Automated tests are a necessity, but they are by far not sufficient as a sole approach.

1/2

2 weeks ago 4 1 1 0
Karteikarte mit Angeban zu Geburtstag und NSDAP-Mitgliednummer

Karteikarte mit Angeban zu Geburtstag und NSDAP-Mitgliednummer

FPÖ wird heute 70. Das 👇ist die NSDAP-Mitgliedkarte ihres ersten Parteichefs Reinthaller. Er trat 1928 bei & war somit ein 100%, später Minister im Anschlusskabinett, SS-General. Ihm folgte Friedrich Peter, ein Angehöriger einer SS-Mordeinheit. Ihm folgte A. Götz, ein hochraniger HJ-Führer.

2 weeks ago 332 96 15 5
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KI wird zum Horrortrip: Kommt das Comeback des Analogen? Die Künstliche Intelligenz macht enorme Fortschritte. Viele Menschen fühlen sich bedroht. Helfen könnte eine Rückbesinnung auf die reale Welt.

Die Online-Welt wird nicht verschwinden, sie bietet zu viele Vorzüge. Aber ein vorsichtiger bis misstrauischer Umgang ist unerlässlich, nicht erst morgen, sondern schon heute. Und vielleicht kommt es zu einer Art Backlash.

2 weeks ago 4 2 0 0
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License (Such As It Is)

This codebase was substantially written by an AI. Whether that means it is owned by anyone is, at time of writing, an open legal question that multiple courts are actively declining to answer. We are not lawyers. We are, however, people who enjoy clarity.

To the extent that any of this is copyrightable by anyone — which may be nobody, or may be the person who typed the prompts, or may be a matter that gets resolved sometime around the heat death of the universe — it is released under the WTFPL.

You know what that stands for.

In adjacent dimensions where this question has already been settled by courts, wizards, or some combination thereof, local laws may vary. We defer to the relevant guild. Void where prohibited by prophecy.

License (Such As It Is) This codebase was substantially written by an AI. Whether that means it is owned by anyone is, at time of writing, an open legal question that multiple courts are actively declining to answer. We are not lawyers. We are, however, people who enjoy clarity. To the extent that any of this is copyrightable by anyone — which may be nobody, or may be the person who typed the prompts, or may be a matter that gets resolved sometime around the heat death of the universe — it is released under the WTFPL. You know what that stands for. In adjacent dimensions where this question has already been settled by courts, wizards, or some combination thereof, local laws may vary. We defer to the relevant guild. Void where prohibited by prophecy.

#claude code wrote this license for my codeberg.org/dtanzer/drag... fun project.
Does that also apply to it's own leaked code? :-D

2 weeks ago 1 0 0 0

I can't stop reading the Claude subreddit where Claude Code users are furious about hitting their token limits and not being able to generate any code for 4 days b/c it is a tasty lil preview of where all the fuckers who keep telling me my career is going away will be when the bubble finally bursts

3 weeks ago 1118 149 29 10

Here is my prediction:

The Magnificent Seven - Alphabey, Amazon, Apple, Meta, Microsoft, Nvidia, and Tesla - will continue to push AI down our throats despite diminishing returns to its users, simply because they’ve invested so much they’ve gone past a point of no return.

3 weeks ago 86 18 5 4
Headline reading Jensen Huang says Nvidia engineers should use AI tokens worth half their annual salary every year to be fully productive — compares not using AI to using paper and pencil for designing chips
News
By Jowi Morales published March 23, 2026
You're not productive if you don't use a lot of AI.

 Jensen Huang at the All-In Podcast
(Image credit: All-In Podcast/YouTube)

Headline reading Jensen Huang says Nvidia engineers should use AI tokens worth half their annual salary every year to be fully productive — compares not using AI to using paper and pencil for designing chips News By Jowi Morales published March 23, 2026 You're not productive if you don't use a lot of AI. Jensen Huang at the All-In Podcast (Image credit: All-In Podcast/YouTube)

Guy who sells cupcakes says everyone should eat 10 cupcakes a day!

That cupcake bakers should be eating 20 cupcakes or get “left behind”

This and more “CEO said” news

3 weeks ago 347 51 34 6
Lavender bonsai in a dark red earth colour round pot with moss and rock landscape.

Lavender bonsai in a dark red earth colour round pot with moss and rock landscape.

Rosemary bonsai in training planted in a light clay colour round pot.

Rosemary bonsai in training planted in a light clay colour round pot.

Aaaand like a classic hits radio station I'll now play the dozen or so bonsai hits from my benchlist for 100th time 😁
🌱🇳🇿
What else is there?
AI wishware & wannabe AI wishware?
Oil wars

Ahh fuxk it..have some bonsai

Sliding into your TL so you smell/taste with your eyes lavender & rosemary

3 weeks ago 16 1 1 1

More and more, I hear devs saying that when they hit their limit - or when e.g. Claude is down (which happens increasingly often) - they stop working.

I guess this is what the hyperscalers want: total reliance.

3 weeks ago 24 6 4 2
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ClaudeCode instances running in docker containers starting and stopping each other: General setup My "agnt" command line tool got a powerful new update: You can run the agents in docker / podman containers now, and they can start and stop each other - on top of being able to communicate. The to...

Or, if you don't want to watch it on a big-tech-platform, here's my peertube:

videos.devteams.at/w/mk4HZayGMx...

3 weeks ago 1 1 0 0
ClaudeCode instances running in docker containers starting and stopping each other: General setup
ClaudeCode instances running in docker containers starting and stopping each other: General setup YouTube video by David Tanzer

My "agnt" tool just became vastly more powerful: It supports agents running in #podman containers ( #docker coming later), and the agents can start and stop each other - that is, they can start and stop other #ClaudeCode instances!

youtu.be/03atfPJpROM

3 weeks ago 1 0 6 0
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8 months ago 330 122 6 3
Video

Full explanation video coming soon - watch this space...
codeberg.org/dtanzer/agnt

#ClaudeCode #MultiClaude

3 weeks ago 0 0 0 0
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Trump just gave Putin Billions of dollars in revenue to keep invading Ukraine.
Please tell me how trump's not a Putin Puppet?

3 weeks ago 458 125 32 7
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Reversible Decisions for Better Software Design (VoxxedDays Zürich)

The slides from my @voxxedzurich.bsky.social talk "Reversible Decisions for Better Software Design" are now online:

speakerdeck.com/dtanzer/reve...

#vdz26

3 weeks ago 1 0 0 0

Forgot that I'm currently not in the #EU -> 26€ #roaming charges for three short phone calls :(

4 weeks ago 0 0 0 0
Selfie of me, sitting in a train. Outside the window: Landscape - A field with some motion blur first, then some trees and distant hills.

Selfie of me, sitting in a train. Outside the window: Landscape - A field with some motion blur first, then some trees and distant hills.

A cup of coffee with two packs of sugar and one pack of milk. "Mit Genuss unterwegs" ("Travelling with pleasure") is written on the sugar.

A cup of coffee with two packs of sugar and one pack of milk. "Mit Genuss unterwegs" ("Travelling with pleasure") is written on the sugar.

On my way to #Switzerland where I'll speak at #VoxxedDays #Zurich

vdz26.voxxeddays.ch
#vdz26

4 weeks ago 2 0 0 0