Blog | JPKCom DB

This is where I write about what I run into in everyday web work — technology, AI, tools and methods. The topics will broaden over time; it starts with a series on SEO and GEO. Below you'll find all posts, newest first.

Latest posts

2026-09-20
Redesign by AI: Why JPKCom DB Deliberately Looks AI-Made

Redesign by AI: how I rebuilt JPKCom DB with Claude Code — Dracula for dark mode, my own light palette, tested contrast and a deliberately AI look.
2026-09-17
BGH Ruling VI ZR 144/23: When Your Shop Sends Data to Third Parties

Germany's Federal Court of Justice allows injunctions against data transfers to third parties. What it decided, what is open and what a test shop really sends.
2026-08-31
Anthropic and Bun: The Runtime Living Inside Your Claude Code Binary

Anthropic bought Bun, Claude Code ships as a Bun executable — and Bun 1.4 was ported to Rust by an AI in eleven days. I opened up the binary on my own machine to check how much of that holds up.
2026-08-27
piplet: When Program and Data Live in the Same File

WordPress' piplet stores its notes behind __halt_compiler() inside its own PHP file. What the source teaches about atomic writes, inode races, validating before parsing and optimistic concurrency — and which of it belongs in your own projects.
2026-08-24
Sveltia CMS for 11ty: The Editorial Interface the Generator Lacks

A Git-based CMS as one HTML file and a script tag: what Sveltia CMS delivers for an 11ty blog, how to self-host it without a CDN — and why two pages of its own documentation disagree about file paths.
2026-08-23
Out of WordPress, Into the Repository: @11ty/import in Practice

One command pulls an entire WordPress blog into your own repository as Markdown — with Mastodon, Bluesky and YouTube thrown in. What @11ty/import 2.0.1 actually delivers, measured across all six sources, including the point where it breaks.
2026-08-22
Why 11ty: Six Years Static — and Why I'm Staying for Build Awesome Too

From my own PHP CMS via WordPress to Eleventy: why 11ty has built my homepage and this knowledge base since 2020 — security, a11y, performance, SEO and GEO, plus an honest take on the Build Awesome rebrand.
2026-08-14
15 September 2026: Cloudflare Changes the Crawler Defaults

Search, Agent, Training — Cloudflare re-sorts bots and blocks two categories by default on ad-bearing pages. Why that can take Googlebot down with it.
2026-08-13
HTML Landmarks in Practice: One Structure for Screen Readers, Search and AI

Landmarks from the ground up: implicit roles, the nesting rules, the role attribute, labelling, copy-ready patterns, a checklist — plus what extractors read from them.
2026-08-10
CSS @layer in Practice: Cascade Layers Instead of Specificity Wars

Cascade layers from the ground up: syntax, cascade order, frameworks like Bootstrap and Tailwind in their own layer, shadow DOM and design tokens.
2026-08-08
DESIGN.md: The Design System as a File the AI Can Read Too

What the DESIGN.md format from Google Labs actually delivers: background, AI value, accessibility and CMS integration — on a living example, drawbacks included.
2026-07-29
Retention Periods: How Long You May Really Keep Applicant and Contact Data

The six-month rule for job applications appears in no statute. Where it comes from, what applies to contact forms, where form data really ends up — and how to get it under control technically.
2026-07-14
Header Sizes: How Big Should a Website Header Be?

Header dimensions with numbers instead of gut feeling: device and resolution data for Germany vs. worldwide, CSS pixels vs. 4K, breakpoints, size tables, accessibility limits and conversion evidence.
2026-07-10
Author pages without external signals: when they start to pay off

Without external signals no project needs an author page — but every project needs an author identity. Threshold model, scenarios, German legal angle.
2026-07-07
The SEO and GEO Series: from the Fundamentals to AI Visibility

An overview of my SEO and GEO series — 15 articles from the SEO foundation through GEO fundamentals and practice to measurement, plus a workshop report. The entry point and table of contents.
2026-07-07
Working Securely with Node.js and npm: My Setup Against Supply-Chain Attacks

How I harden Node.js and npm projects against supply-chain attacks: Socket Firewall with a walkthrough, .npmrc, a hardened package.json, npm ci, provenance signatures — plus a copy-paste starter.
2026-07-06
Making-of: Shipping and Auto-Updating Your Own WordPress Plugins with GitHub Actions

How a WordPress plugin outside the .org directory gets the one-click update experience: GitHub Actions builds the ZIP and checksum, a static JSON manifest on gh-pages replaces the rate-limited GitHub API, and a lean updater class hooks safely into WordPress' update system.
2026-07-03
Configuring Claude Code: From Defaults to Engineering Partner

The settings that genuinely move the needle in Claude Code: a lean context, correct hooks, permission modes, effort control and subagents — with the real mechanisms instead of the half-truths making the rounds.
2026-07-03
Who Checks the Checker? Adversarial Fact-Fidelity for AI Text

Why naive AI fact-checking fails and how an adversarial review actually works — with a copyable verification prompt, the ground-truth hierarchy, and a real case where even the checker got it wrong.
2026-06-30
Claude Code in a Container: Podman, Docker and Shared Setups

How to run Claude Code in Podman (rootless/rootful) and Docker, share containers and ~/.claude directories across multiple users, and set permissions cleanly with groups, setgid and default ACLs.

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