LATEST
ADHD Diary
No-Travel-Day
LLMs
ShieldX
Hyperfocus
Open Source
Software Engineering
Neurodivergent
Build in Public
155 commits. 8 days. 8 projects. 74 new features. 62 bug fixes.
Those are the raw numbers from a week that was nothing special. No sprint, no hackathon, no deadline pressure. Just an ADHD brain that opens the laptop at
Rene Fichtmueller
/
2026-04-06
/
~3 min read
ADHD Diary
Life
LLMs
Neurodivergent
Mental Health
Personal
Software Engineering
Productivity
For some people, ADHD is not a trend.
I’m deeply grateful to one of my bosses who, about two years ago, suggested I get tested. During the assessment, I
Rene Fichtmueller
/
2026-04-05
/
~2 min read
Networking
BGP
Security
RPKI
ASPA
Route Leaks
Internet Infrastructure
Routing Security
RFC 9234
Path Validation
BGPsec
We validated who is allowed to announce a prefix. We never validated how it gets there.
Rene Fichtmueller
/
2026-04-05
/
~2 min read
Open Source
Claude Code
AI
Productivity
Memory System
Developer Tools
CLI
Context Management
TypeScript
Claude Code forgets everything between sessions. I built a structured memory system that fixes that — no database, no server, just Markdown files.
Rene Fichtmueller
/
2026-04-05
/
~2 min read
Open Source
AI
Writing
Quality
Content Detection
AI Slop
NLP
Developer Tools
TypeScript
Writing Tools
200+ English and 120+ German AI-style phrases. 14 structural patterns. Because "delve into" needs to die.
Rene Fichtmueller
/
2026-04-05
/
~2 min read
Open Source
AI
Document Intelligence
MCP
Paperless-ngx
OCR
RAG
Ollama
TypeScript
Knowledge Management
Paperless-ngx is great at storing documents. It's terrible at understanding them. PaperCortex fixes that.
Rene Fichtmueller
/
2026-04-05
/
~1 min read
Open Source
Claude Code
Productivity
DevOps
Sync
Multi-Device
Developer Tools
CLI
TypeScript
I work on a MacBook, a Mac Studio, and sometimes SSH into servers. Claude forgot everything every time I switched. Not anymore.
Rene Fichtmueller
/
2026-04-05
/
~1 min read
Open Source
Security
Claude Code
DevOps
Git Hooks
Secret Scanning
Pre-commit
Developer Tools
AWS
Credential Leak
I almost pushed AWS credentials to GitHub. Twice. Then I built a system that makes it impossible.
Rene Fichtmueller
/
2026-04-05
/
~2 min read
Open Source
Security
AI
LLM
ShieldX
Prompt Injection
Self-Learning
Kill Chain
MITRE ATLAS
MCP Guard
TypeScript
500+ detection patterns. 10-layer pipeline. Kill chain mapping. And it learns from every attack it sees.
Rene Fichtmueller
/
2026-04-05
/
~2 min read
Open Source
Networking
BGP
RPKI
PeerCortex
ASPA
Network Intelligence
Internet Infrastructure
Routing Security
Health Check
Peering
70,000+ networks. 13 health checks. One tool that didn't exist — so I built it.
Rene Fichtmueller
/
2026-04-05
/
~2 min read
// about the author
Rene Fichtmueller
Social Networker
20+ years building and breaking networks. Optical transport, peering, data center infrastructure. Writing about the things that go wrong at 2AM — and how to prevent them.