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Sebastian Korfmann

@skorfmann.com
1.6K followers 764 following 1.7K posts

Agentic Coding Trailblazer - Co-Organizing “Agentic Hamburg” agentic.hamburg - Building jot jot.skorfmann.com/jot Based in #hamburg - skorfmann.com

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Sebastian Korfmann @skorfmann.com · 23/09/2026
not really surprising that it works - what still amazes me is that this was a plain session, no "/goal" or workflow, it just kept going fully unattended, made judgment calls like aligning the sound level, quality improvements, etc. This would have taken me days, and the results would've been worse
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Sebastian Korfmann @skorfmann.com · 23/09/2026
the second session was taking the other half of the videos still raw on a dropbox, analysing, cutting, editing, polishing and uploading to youtube via the browser in roughly 5 hours for 10 videos.
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Sebastian Korfmann @skorfmann.com · 23/09/2026
These were two opus 5.5 session, the first one yesterday evening editing the first stage which was already a draft in youtube (via browser) and analysing via gemini blog.google/innovation-a...
blog.google
Introducing agentic video understanding with Gemini
We’re launching agentic video understanding across our latest Gemini models for improved accuracy and lower costs and token usage.
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Sebastian Korfmann @skorfmann.com · 23/09/2026
Opus 5.5 was busy and published the talks we had for the agentic.hamburg conf we did earlier this year. www.youtube.com/playlist?lis...
youtube.com
Agentic Conf Hamburg 2026 - YouTube
Talks from Agentic Conf Hamburg 2026: a one-day conference on agentic coding, by practitioners for practitioners. 22 March 2026, SAE Institute Hamburg. Pract...
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Reposted by Sebastian Korfmann
Tobias Müller @tobilg.com · 27/08/2026
Launching Gespenst 👻 - A browser & headless terminal built on Ghostty's ghostty-vt WASM. Byte-oriented Web Streams API, WebGPU/WebGL2 rendering, and an xterm.js 6.0 compatibility package so you can try it without a rewrite. gespenst.dev
gespenst.dev
gespenst — Ghostty VT for the web
A high-performance TypeScript terminal with Ghostty VT and portable browser-only shells.
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Sebastian Korfmann @skorfmann.com · 19/08/2026
much security
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Sebastian Korfmann @skorfmann.com · 18/08/2026
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Sebastian Korfmann @skorfmann.com · 18/08/2026
Is my Bluesky follow feed dying? Yes. isblueskydying.com/skorfmann.com So whom should I follow? Mostly agentic / ai topics or somehow local (Hamburg metropolitan area)
isblueskydying.com
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Sebastian Korfmann @skorfmann.com · 17/08/2026
Same
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Sebastian Korfmann @skorfmann.com · 14/08/2026
I know - and I’m curious if someone replicated this exact version as closely as possible. I don’t think that all signals are publicly exposed though (e.g. media open)
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Sebastian Korfmann @skorfmann.com · 14/08/2026
So, anyone built an x like for you feed based on what they published? Would be curious how this works on Bluesky www.heise.de/en/news/X-ma...
heise.de
X makes timeline algorithms open source – and promises transparency
There has been much speculation about how X decides which posts end up in the algorithmic timelines. Now you can check it yourself.
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Sebastian Korfmann @skorfmann.com · 14/08/2026
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Sebastian Korfmann @skorfmann.com · 14/08/2026
Besuch am Badestrand
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Sebastian Korfmann @skorfmann.com · 06/08/2026
2026. Ein Terminbuchungsportal erlaubt standardmäßig nur die großen Mailanbieter. Eigene Domain? Ticket aufmachen, warten, bis ein Techniker sie von Hand freischaltet. Kein MX-Check, kein Double-Opt-In. Menschliche Freigabe.
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Sebastian Korfmann @skorfmann.com · 30/07/2026
A buzzing wiki 👀
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Reposted by Sebastian Korfmann
Hendrik Mans @hmans.dev · 29/07/2026
August 25, Hamburg, save the date! #svelte
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Sebastian Korfmann @skorfmann.com · 29/07/2026
If this bridge was a software project 😅
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Sebastian Korfmann @skorfmann.com · 29/07/2026
The new Sternbrücke is on the move: 108 m long, 4,500 tonnes, rolled through Altona to replace a bridge from 1926. There’s a livestream. #hamburg www.eisenbahnbruecken-ehm.de/sternbruecke...
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Sebastian Korfmann @skorfmann.com · 28/07/2026
this got so annoying that I'm back to codex for coding projects
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Sebastian Korfmann @skorfmann.com · 12/07/2026
So Anthropic keeps „relaunching“ Fable every week now, or what is this about?
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Sebastian Korfmann @skorfmann.com · 10/07/2026
Ostsee
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Reposted by Sebastian Korfmann
Hendrik Mans @hmans.dev · 08/07/2026
Very happy to announce that @chatto.run, the amazing little team chat app you can self-host from your own infrastructure (and quite easily so), is now available & Open Source. ✨
hmans.dev
Chatto is now Open Source!
The snappiest chat application you've ever used is now available for self-hosting.
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Reposted by Sebastian Korfmann
Carlo Zottmann @zottmann.dev · 28/06/2026
For testing out a few inference providers for #GLM5.2, I created a new #Pi extension for Euro provider #TensorX. They have a smol selection of models (tensorx.ai/models/), but what they serve, they serve *fast*. 200+ tps, constantly. Nice! github.com/czottmann/pi... #LLM
github.com
GitHub - czottmann/pi-tensorx: TensorX provider extension for pi coding agent. (TensorX is a European LLM router. I'm a customer.)
TensorX provider extension for pi coding agent. (TensorX is a European LLM router. I'm a customer.) - czottmann/pi-tensorx
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Sebastian Korfmann @skorfmann.com · 24/06/2026
Klimaanlagen sind das neue Klopapier 🌞
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Sebastian Korfmann @skorfmann.com · 17/06/2026
2 hours after announcing all 130 seats are gone 🤯 We need larger venues 😅
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Sebastian Korfmann @skorfmann.com · 17/06/2026
Agentic Coding Meetup #6 - Tue 7 July, 18:00 @ XING Baumwall. Two talks + lightning demos (5 min) + people building with AI for real → luma.com/agentic-ymzl
luma.com
Agentic Coding Meetup #6 · Luma
Agentic Coding Meetup #6 — hosted by XING at their new Baumwall office. Hamburg's meetup for people who build with AI, not just talk about it. Practitioners…
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Sebastian Korfmann @skorfmann.com · 13/06/2026
www.anthropic.com/news/fable-m...
anthropic.com
Statement on the US government directive to suspend access to Fable 5 and Mythos 5
The US government has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States.
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Sebastian Korfmann @skorfmann.com · 13/06/2026
good bye claude #fable - what a shitshow
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Sebastian Korfmann @skorfmann.com · 12/06/2026
Die WM läuft – aber wo? ⚽📺 Kleine Web-App für deutsche Fans: alle 104 Spiele in deutscher Zeit, TV-Sender pro Spiel (ARD/ZDF/MagentaTV) inkl. Mediathek-Deep-Links – plus Public-Viewing-Spots in 7 Städten. 👉 jot.skorfmann.com/wm2026/
jot.skorfmann.com
WM26 · Spielplan & TV-Guide
Wer spielt heute, wo läuft's im TV (ARD, ZDF, MagentaTV) und wo ist Public Viewing? Alle 104 Spiele in deutscher Zeit.
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Sebastian Korfmann @skorfmann.com · 10/06/2026
A titanic simulation 🚢 #fable5 jot.skorfmann.com/titanic/
jot.skorfmann.com
RMS Titanic — The Sinking in 3D, April 14–15, 1912
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Sebastian Korfmann @skorfmann.com · 09/06/2026
> Meet Fable 5, our newest model for complex, long-running work. Try anytime with /model. > Included in your plan limits until Jun 22, then switch to usage credits to continue. www.anthropic.com/claude/fable 👀
anthropic.com
Claude Fable
Next generation of intelligence for the hardest knowledge work and coding problems.
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Sebastian Korfmann @skorfmann.com · 05/06/2026
Using "dynamic workflows" in claude a bit too intense I guess > API Error: Server is temporarily limiting requests (not your usage limit) · Rate limited
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Sebastian Korfmann @skorfmann.com · 05/06/2026
just added a more interactive demo #flappybird
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Sebastian Korfmann @skorfmann.com · 04/06/2026
Built a tiny browser engine for fun 🦀 → 🕸️ It parses, styles, lays out (taffy), scripts (QuickJS) and paints (tiny-skia) HTML/CSS/JS entirely inside WebAssembly. The browser never sees the markup - only pixels come back out. jot.skorfmann.com/prism-render...
jot.skorfmann.com
Prism — a browser engine inside WebAssembly
An experimental, for-fun prototype: a from-scratch HTML/CSS/JS rendering engine in Rust + WASM (partial coverage, not yet open source), explained interactively — with live demos of the real renderer.
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Sebastian Korfmann @skorfmann.com · 04/06/2026
and of course, the video itself was also created via ai helmut.rocks/making-of.html
helmut.rocks
Helmut & die Tausend Euro — Making-of
Von einer Tagesschau-Meldung zum KI-Deutschrap-Musikvideo mit Helmut, dem Yeti-MC. End-to-end aus Claude Code — inkl. Live-DJ-Mixer.
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Sebastian Korfmann @skorfmann.com · 04/06/2026
The compiled wasm for the browser is about 2.5 mb and runs and renders arbitrary JS, CSS (subset) and HTML
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Sebastian Korfmann @skorfmann.com · 04/06/2026
A fun experiment I'm pursuing with Codex, building a simple browser rendering engine within a browser via Rust / WASM - Latest and most sophisticated take so far: play a video file with sound and do all the work in wasm. Codex runs for more than 16 hours already, and it's getting there
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Sebastian Korfmann @skorfmann.com · 03/06/2026
Dynamic Workflows in Claude Code to non coding problems are superb for fanning out 100s of subagents in minutes.
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Sebastian Korfmann @skorfmann.com · 30/05/2026
would certainly make "alles wegschmeissen und neubauen" easier to push through :)
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Sebastian Korfmann @skorfmann.com · 30/05/2026
running codex in multiple subsequent "/goal" loops for the last 24 hours - so far no limit in sight
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Sebastian Korfmann @skorfmann.com · 26/05/2026
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Sebastian Korfmann @skorfmann.com · 26/05/2026
half a day of in depth code analysis from various angles of a handful of repositories via Claude Code using an API key is worth a Claude Max subscription 💸
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Sebastian Korfmann @skorfmann.com · 25/05/2026
Pelzerhaken / Brodau - also praktisch gleich ums Eck
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Sebastian Korfmann @skorfmann.com · 25/05/2026
In other news: wir sind jetzt dauercamper an der Lübecker Bucht 😅🏝️
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Sebastian Korfmann @skorfmann.com · 21/05/2026
And the making of helmut.rocks/making-of.html
helmut.rocks
Helmut & die Tausend Euro — Making-of
Von einer Tagesschau-Meldung zum KI-Deutschrap-Musikvideo mit Helmut, dem Yeti-MC. End-to-end aus Claude Code — inkl. Live-DJ-Mixer.
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Sebastian Korfmann @skorfmann.com · 21/05/2026
Full youtube www.youtube.com/watch?v=cy2S...
youtube.com
Tausend Euro – HELMUT der Yeti
YouTube video by Helmut
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Sebastian Korfmann @skorfmann.com · 21/05/2026
Shipped a full music video end-to-end with AI: song from Suno, scenes from Seedance, lip-sync via another model, orchestrated from Claude Code. Wild what a bit of AI plumbing gets you these days. Heres the teaser
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Sebastian Korfmann @skorfmann.com · 19/05/2026
but like almost all the other announcments "avaialble later this year"
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Sebastian Korfmann @skorfmann.com · 19/05/2026
Google's Antigravity in search kind of blows my mind #googleio www.youtube.com/live/wYSncx9...
youtube.com
Google I/O '26 Keynote
YouTube video by Google
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Sebastian Korfmann @skorfmann.com · 12/05/2026
Leipziger Allerlei
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