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Dirk Holtwick

@holtwick.bsky.social
58 followers 105 following 22 posts

Indie Dev

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Dirk Holtwick @holtwick.bsky.social · 22/09/2026
Sandbox Anecdote: I won't give Claude the original PDF. Instead, Claude writes a test script that I run outside the sandbox; it writes the analyzer output to /tmp for Claude to read. 🤖 Use bxsandbox.app to protect your privacy. #claude #sandbox #claudestricks #apple #macos
bxsandbox.app
Put AI apps on your Mac into a sandbox | BX Sandbox Mac App
BX starts AI apps like Claude, Claude Code or Cursor in a sandbox on macOS. They only see the folders you allow — not your passwords, mail, messages or the rest of your files.
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Dirk Holtwick @holtwick.bsky.social · 21/09/2026
BX Sandbox is continuously improving, thanks to your feedback. Latest release 1.2 is available now. The domain has changed to bxsandbox.app #sandbox #ai #security #macos #compliance #claude #openai #google #apple
bxsandbox.app
Put AI apps on your Mac into a sandbox | BX Sandbox Mac App
BX starts AI apps like Claude, Claude Code or Cursor in a sandbox on macOS. They only see the folders you allow — not your passwords, mail, messages or the rest of your files.
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Dirk Holtwick @holtwick.bsky.social · 20/09/2026
Words instead of characters: collaborative rich text without Yjs holtwick.de/blog/collabo... #localfirst #yjs #crdt #collaboration #richtext #tiptap
holtwick.de
Words instead of characters: collaborative rich text without Yjs | Dirk Holtwick
Why I don't use a character-level CRDT like Yjs for collaborative rich text, but merge words as spans in an ordered map with fractional keys: readable JSON, auditable transactions, no merge code.
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Dirk Holtwick @holtwick.bsky.social · 09/09/2026
What happens when you lock Claude in a macOS Sandbox? holtwick.de/blog/bx Vote and discuss on HN news.ycombinator.com/item?id=4961... #ai #sandbox #macos #claude #anthropic #hn
holtwick.de
What happens when you lock Claude in a macOS sandbox? | Dirk Holtwick
A hands-on report on AI coding tools inside Apple's Seatbelt sandbox: how Claude tries to get around restrictions, what really needs protecting, and how the app BX came out of it.
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Dirk Holtwick @holtwick.bsky.social · 08/09/2026
www.ifun.de/mac-app-bx-s... #ai #ki #sandbox #macos
ifun.de
Mac-App BX: Sandbox für KI-Agenten und Entwickler-Tools
KI-Werkzeuge wie Claude Code, Cursor oder Codex bekommen bei der Arbeit häufig weitreichenden Zugriff auf den eigenen Mac. Wer einem Agenten ein Projektverzeichnis übergibt, möchte damit aber nicht au...
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Dirk Holtwick @holtwick.bsky.social · 01/09/2026
AI with a seatbelt - BX macOS app You decide what your AI, IDE, app or command may see from your file system. Set up once and then it's just one click. Works perfectly for AI harness inside VSCode. Menu bar icon tells if you're protected bx-ai.eu #MacOS #AI #Sandbox #Security #Privacy #DevTools
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Dirk Holtwick @holtwick.bsky.social · 19/08/2026
Not 1.0 yet, but give it a try. Feedback very welcome! bx-ai.eu AI with a seatbelt // Claude, VS Code, and other apps run in a macOS sandbox and can only see what you allow them to see. It's a breeze. #ai #sandbox #claude #vscode #githu #copilot #codex #pi #protect
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Dirk Holtwick @holtwick.bsky.social · 19/08/2026
Noch nicht ganz fertig, aber euch zeige ich's ja schon mal... bx-ai.eu BX ist die bequeme Sandbox für die AI-Apps und Entwicklungsumgebungen, die noch keine haben. Schützt eure Daten, besonders die sensiblen, mit der macOS eigenen Apple-Sandbox. #ai #sandbox #macos #apple #claude #vscode #codex
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Dirk Holtwick @holtwick.bsky.social · 21/05/2026
Voilà PDFify 5.0 is here → Tesseract 5 OCR, optimized for Apple Silicon → Apple Vision OCR with automatic language detection → Compression, redesigned — four clear modes → Full French localization pdfify.app?ref=md  #PDFify #macOS #AppleSilicon #OCR #ProductUpdate #Apple
pdfify.app
Text recognition and PDF post-processing | PDFify Mac App
Searchable PDF, fast OCR in over 100 languages, PDF post-processing and file size reduction, batch processing. Try it now for free!
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Dirk Holtwick @holtwick.bsky.social · 27/04/2026
Jetzt mit eigener Domain geht-der-fahrstuhl.de #fahrrad #ruhr #rs1
geht-der-fahrstuhl.de
Geht der Fahrstuhl? — RS1 Mülheim
Inoffizieller Live-Status des Fahrstuhls am RS1 in Mülheim an der Ruhr.
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Dirk Holtwick @holtwick.bsky.social · 27/04/2026
In meiner Stadt Mülheim an der Ruhr gibt es eine unendliche Pannengeschichte um einen Fahrradfahrstuhl am Radschnellweg RS1. Höchste Zeit, um wenigstens den Status vorm Losfahren checken zu können. 🙈 🚳 #rs1 #fahrstuhl #mülheim #ruhr #adfc #fahrrad #verkehr rs1.holtwick.de
rs1.holtwick.de
Läuft der Fahrstuhl? — RS1 Mülheim
Inoffizieller Live-Status des Fahrstuhls am RS1 in Mülheim an der Ruhr.
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Dirk Holtwick @holtwick.bsky.social · 28/03/2026
No more AI yolo on your Mac! 🛡️ AI tools like Claude Code can read, write and delete any file your user can access. bx-mac gives you a native macOS sandbox to restrict any command to just the folders it actually needs. github.com/holtwick/bx-mac #macOS #opensource #security #AI #Apple #mac #privacy
github.com
GitHub - holtwick/bx-mac: Launch apps in a macOS sandbox — only the project directory is accessible
Launch apps in a macOS sandbox — only the project directory is accessible - holtwick/bx-mac
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Reposted by Dirk Holtwick
dan @danabra.mov · 18/01/2026
formats over apps
overreacted.io
A Social Filesystem — overreacted
Formats over apps.
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Dirk Holtwick @holtwick.bsky.social · 11/03/2025
To counter my own “Weltschmerz”, I'm trying to make my contribution by boycotting services that are beneficial to Trump and others who have overstepped the mark. Here is my first article on the topic: holtwick.de/en/blog/unpl... #UnplugTrump #LocalFirst #SelfHosting #OpenSource
holtwick.de
UnplugTrump | Dirk Holtwick
UnplugTrump: How can you make yourself independent of US services, especially in the age of Donald Trump? The key points are self-hosting, decentralization and open source.
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Dirk Holtwick @holtwick.bsky.social · 02/02/2025
Demo in Mülheim an der Rihr am 9. Februar um 16:30 am Rathaus www.waz.de/lokales/muel...
waz.de
Gegen rechts: Mülheim plant „Lichtermeer für die Demokratie“
Als Reaktion auch auf die jüngsten Mehrheiten im Bundestag aus CDU und AfD ruft das Bündnis „Mülheim stellt sich quer“ zur Protestkundgebung auf.
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Dirk Holtwick @holtwick.bsky.social · 29/01/2025
XML2Invoice in E-Invoice.Space umbenannt, da es nun einiges mehr kann als XML-Rechnungen in PDF umwandeln ;) holtwick.de/de/blog/einv... e-invoice.space #einvoice #erechnung #xrechnung #en16931 #zugferd #xml #rechnung
holtwick.de
E-Invoice Space | Dirk Holtwick
Umbenennung von XML2Invoice in E-Invoice Space
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Dirk Holtwick @holtwick.bsky.social · 07/01/2025
2025 🎉 Schreibe deine erste E-Rechnung in einer Minute ohne Anmeldung. Oder hast du bereits eine XML-Rechnung erhalten und möchtest sie lesen? Einfach lokal konvertieren auf xml2invoice.com?ref=mastodon #ERechnung #Rechnung #XML #zugferd #EN16931 #XRechnung #PDF #PDFA
xml2invoice.com
E-invoices: Easily create, read and pay
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Dirk Holtwick @holtwick.bsky.social · 30/12/2024
In the new year, Receipts will be reborn as “Receipts Space”: ✨ Work on multiple devices at the same time 📄 Import and display e-invoices 📁 Store documents, not only receipts 🤖 Better and faster OCR 🔒 Privacy by design, no cloud Join the public beta now receipts-space.com/beta?ref=bsky
receipts-space.com
Beta | Receipts Mac App
Collects receipts and automatically recognizes values. Ideal for taxes, accounting, finances and expenses. Try it now for free!
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