Small, sharp tools that do one thing and can prove they did it. Most are a single static binary or run entirely in the browser — no backend, no account, no telemetry. Much of the code is written with coding agents at the keyboard; what ships is what the tests, the CI and the benchmarks let through, and I answer for it. Grouped by what they are; newest first inside each group.
LLM & agent tooling — instrumenting, measuring and fact-checking what models actually do · 2 projects
- comparereleaseii — fact-check release notes against the diff that shipped — GitHub, Forgejo, GitLab or any git clone. ·
TypeScript· live · gh extension - claudii — statusline for Claude Code: session cost, context %, rate limits, model health. Pure bash + jq, zero daemons. ·
Shell· live
More on each — LLM & agent tooling in detail →
Backup, recovery & proof — systems that assume the failure already happened and stay useful anyway · 1 projects
- how-small-can-we-go — trust-golf: one champion per task, dethroned by needing less trust. Measured, never claimed. ·
Go· live
More on each — Backup, recovery & proof in detail →
Local-first web apps — static pages that keep your data in your own browser · 7 projects
- db-wallet — drink tracking wallet for the crowd at bitcircus101.de and Datenburg e.V. Bonn. ·
JavaScript· live - gymii — floor-plan your gym, log sets against numbered machines. Offline-first, data never leaves the device. ·
JavaScript· live - musiclinkii — turn one music link into links for every streaming platform. ·
JavaScript· live - kuvertii — read what an email header says about you — who it was really addressed to, where the unsubscribe link leads. ·
JavaScript· live - putzii — cleaning schedule shared by capability link, with QR check-in. No backend at all. ·
JavaScript· live - shieldchipiii — stone-chip logbook for your windshield, so the insurance conversation has a record instead of a memory. ·
JavaScript· live - app-icons-generator — every iOS, macOS and watchOS icon size from one 1024px PNG — CLI and browser. ·
Shell· live
More on each — Local-first web apps in detail →
Terminal & macOS — things that live in a shell, or in the menu bar next to it · 4 projects
- pegel-visual — live ASCII water levels for German rivers, with an optional aircraft overlay from your own ADS-B receiver. ·
JavaScript· live - KeebLock — locks the keyboard while you clean it, with animations worth the thirty seconds. ·
Swift - epcii — EPC QR code (GiroCode) generator — one static binary with its own QR encoder core. ·
Go· live - git-times-live — a standalone live broadcast TV channel for your git activity. ·
Shell· live
More on each — Terminal & macOS in detail →
FreshRSS extensions — four small extensions for the reader I actually use every day · 4 projects
- ShareViaQRCode — a large QR code for the current article, so a phone can pick the link off the screen. ·
JavaScript - NoteDrop — drop notes and links on one device, copy them on another with one click. ·
PHP - ClickHistory — keeps a history of the article links you actually opened. ·
PHP - ExitReaderView — a floating button to leave the reading view in one click. ·
JavaScript
More on each — FreshRSS extensions in detail →
bmako.de — IT consulting, Bonn · bitcircus101.de — open hackspace, Bonn
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