Isaac Lins

role: Application developer
& security analyst
at: Swisscom, since 2022
Switzerland
local time: --:--:--
Zurich
for terminals: curl isaaclins.com

I build applications and ship AI‑powered tools. The goal: become a top AI engineer and build systems that make it to production.

1stnational IT Skills Battle 2025, cybersecurity 29posts that explain tech in plain words

AItools & agents, from prompt to production

about

I started as a developer and moved into security. Both stuck.

I craft clean, efficient applications across many languages and frameworks, and I know how they break, because breaking them is the other half of the job.

Most of my time now goes to the AI side: LLMs, agents, and the tooling around them. The security background is why I build those systems with security in mind, not as an afterthought.

workgit log --graph

nowa4d82da

HEAD -> mainsince Sep 30, 2026

Stewie

An AI agent with its own computer. I send outcomes, it does the work.

A small machine in my living room that I never log into. I talk to it from my phone. It runs my servers, keeps its own notes, and every night at 2:30 it dreams: it replays the day and writes down what it learned.

built on: Claude · T3 Code · Ubuntu · systemd
pieces: its own notes, a search over every session, nightly dream, a projector wall
first week: servers moved, hackathon entry (3rd, Zurich hub), a Minecraft server with 65 challenges

Meet Stewie

Real requests, from Stewie’s first post

Oct 2026417d035

3rd · Hack-Nation 7 ZurichPython

Rental Law Navigator

US rental law for any address, quoted word for word.

Type an address and get the rules that apply there: rent limits, evictions, deposits, fees. Every answer cites its source with an as-of date and shows what is about to change. Built with Stewie for the RealPage challenge.

under the hood: US Census geocoder · cited sources · change tracking
languages: English, Spanish

Try it Source

Rental Law Navigator: the rules at 3515 Fillmore St, San Francisco

A real lookup: 3515 Fillmore St, San Francisco

Oct 20261b623a3

2 ★Claude Code skill

demo-video-skill

Give Claude Code a URL. Get a product demo video.

It explores the site, picks the one flow worth showing, writes the script from what the page really says, records it in a real browser and cuts a video under 60 seconds: smooth zooms, captions, voice-over.

stack: Playwright · ElevenLabs · ffmpeg
checks: length, codecs, loudness, caption sync

Get the skill

The skill made this from one prompt: navigator.isaaclins.com

Oct 2026851cf10

65 challengesJava · Fabric

Challenge Server

Minecraft with friends, but every run is a challenge.

You land in a lobby and pick challenges with a nether star: shared hearts, hotbars that swap every few minutes, hardcore runs that reset the world for everyone. A fresh world per run, the good ones saved.

built from: own Fabric mod · own Velocity plugin · Minecraft 26.2

The lobby of the challenge server at minecraft.isaaclins.com

The lobby, in game

Aug 2026cc88217

11 ★Swift · SwiftUI

FreeSnitch

See what your Mac is talking to. Block what you don't trust.

A free, open-source application firewall for macOS: rules per app, alerts on new connections, a live map of where your traffic goes, DNS over HTTPS. No subscription, no telemetry.

under the hood: NEFilterDataProvider · XPC helper · SwiftUI
docs: in 6 languages

Download Source

FreeSnitch 1.0: apps with their traffic, a world map of where it goes and a summary

Aug 2026977842a

securityTypeScript

pi-vault

Let an agent use a secret it never gets to see.

The agent names a secret and a command. You approve. The key goes from the macOS keychain straight into the command and is redacted from the output. The README says plainly what 0.1 can’t stop yet. Touch ID is next.