Field notes on AI engineering, self-hosted infrastructure and home automation. Concrete setups, real failures, reproducible solutions.https://systemebene.house-harkonnen.comenhttps://systemebene.house-harkonnen.com/en/articles/agent-plugins-portable-package-formathttps://systemebene.house-harkonnen.com/en/articles/agent-plugins-portable-package-formatAmazon, Cursor, Microsoft, OpenAI and Vercel are driving a shared package format for Agent Skills and MCP servers. What Agent Plugins 1.0 standardizes and leaves open.Sat, 08 Aug 2026 00:00:00 GMTai-engineeringmcpsoftware-architecturedaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/coding-agent-permission-promptshttps://systemebene.house-harkonnen.com/en/articles/coding-agent-permission-promptsMore than 40,000 game rounds show how easily people miss dangerous agent commands. The deeper problem is that approval prompts are not a reliable security boundary.Fri, 07 Aug 2026 00:00:00 GMTai-engineeringsecuritycoding-agentsdaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/home-assistant-local-llmhttps://systemebene.house-harkonnen.com/en/articles/home-assistant-local-llmHow Home Assistant uses a local LLM through Ollama to understand free-form commands that were never preprogrammed, including the setup, dead ends and limits.Wed, 05 Aug 2026 00:00:00 GMThome-automationself-hostingai-engineeringdaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/semantic-search-beats-deep-agentshttps://systemebene.house-harkonnen.com/en/articles/semantic-search-beats-deep-agentsA new study compares semantic repository indexes with delegated Grep search. The numbers strongly favour retrieval, but only in a narrowly defined scenario.Tue, 04 Aug 2026 00:00:00 GMTai-engineeringcoding-agentssoftwareentwicklungdaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/build-your-own-mcp-serverhttps://systemebene.house-harkonnen.com/en/articles/build-your-own-mcp-serverWhat actually goes into a minimal MCP server: SDK selection, tool design, validation and the mistakes worth making once.Mon, 03 Aug 2026 00:00:00 GMTai-engineeringmcpself-hostingdaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/swiss-banking-ai-compliancehttps://systemebene.house-harkonnen.com/en/articles/swiss-banking-ai-complianceSwitzerland has no dedicated AI law, but FINMA has clear expectations for governance and risk management. What Guidance 08/2024 means in practice and which technical patterns help.Sun, 02 Aug 2026 00:00:00 GMTai-engineeringcompliancefinmadaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/claude-mythos-hawk-cryptanalysishttps://systemebene.house-harkonnen.com/en/articles/claude-mythos-hawk-cryptanalysisAnthropic used Claude Mythos Preview to find a key-recovery attack on HAWK. What the mathematics means, what the attack cannot do and how the coverage frames it.Sat, 01 Aug 2026 00:00:00 GMTai-engineeringsecuritykryptografiedaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/prompt-injection-role-confusionhttps://systemebene.house-harkonnen.com/en/articles/prompt-injection-role-confusionAn ICML paper explains prompt injection as a failure in how LLMs internally represent roles and shows why common mitigation patterns are structurally limited.Sat, 01 Aug 2026 00:00:00 GMTai-engineeringsecurityllmdaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/eu-ai-act-swiss-companieshttps://systemebene.house-harkonnen.com/en/articles/eu-ai-act-swiss-companiesWhich EU AI Act duties become relevant in August 2026, what the AI Omnibus postponed and why companies and self-employed professionals in Switzerland can still fall within scope.Fri, 31 Jul 2026 00:00:00 GMTai-engineeringregulierungeuschweizdaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/github-stacked-pull-requestshttps://systemebene.house-harkonnen.com/en/articles/github-stacked-pull-requestsGitHub now offers native Stacked Pull Requests in Public Preview. A hands-on test with the gh-stack CLI extension and what the workflow actually changes in practice.Fri, 31 Jul 2026 00:00:00 GMTsoftwareentwicklunggitgithubdaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/opus-5-slopcodebench-resultshttps://systemebene.house-harkonnen.com/en/articles/opus-5-slopcodebench-resultsA new SlopCodeBench run puts Opus 5 well ahead of Opus 4.8 and Sonnet 5, yet none of them completes a single task. A closer look at the benchmark and the numbers.Thu, 30 Jul 2026 00:00:00 GMTai-engineeringcoding-agentsbenchmarksclaudesoftware-qualitätdaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/mcp-stateless-protocol-updatehttps://systemebene.house-harkonnen.com/en/articles/mcp-stateless-protocol-updateThe new MCP specification removes sessions and handshakes while adding extensions, tasks, MCP Apps, caching and OpenTelemetry conventions.Tue, 28 Jul 2026 00:00:00 GMTai-engineeringmcpllmsoftware-architecturedaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/docker-gitops-renovate-sopshttps://systemebene.house-harkonnen.com/en/articles/docker-gitops-renovate-sopsHow I deploy Docker Compose stacks to several hosts from Git, version encrypted secrets and automate image updates without giving up control.Fri, 24 Jul 2026 00:00:00 GMTself-hostingdockergitopssecuritydaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/paperless-windmill-ollama-llamaindexhttps://systemebene.house-harkonnen.com/en/articles/paperless-windmill-ollama-llamaindexHow I classify documents locally, reuse existing correspondents and document types, rescue poor OCR with vision and approve only genuinely new cases through Telegram.Sun, 19 Jul 2026 00:00:00 GMTself-hostingai-engineeringpaperless-ngxollamawindmilldaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/vibe-coding-with-ticketshttps://systemebene.house-harkonnen.com/en/articles/vibe-coding-with-ticketsHow versioned Markdown tickets turn spontaneous prompts into a controllable development process, where the approach helps and where it reaches its limits.Mon, 13 Jul 2026 00:00:00 GMTai-engineeringvibe-codingsoftwareentwicklungdaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/authentik-forward-auth-caddyhttps://systemebene.house-harkonnen.com/en/articles/authentik-forward-auth-caddyHow to protect self-hosted services with one central login even when the applications themselves support neither SSO nor two-factor authentication.Sun, 05 Jul 2026 00:00:00 GMTself-hostingsecuritydaniel.prinz81@gmail.com (Daniel Prinz)https://systemebene.house-harkonnen.com/en/articles/singularity-ai-engineering-astronomy-assistanthttps://systemebene.house-harkonnen.com/en/articles/singularity-ai-engineering-astronomy-assistantHow Singularity uses LlamaIndex function agents, local RAG, Chainlit, Phoenix and Stellarium to answer astronomy questions and plan observing nights.Wed, 01 Jul 2026 00:00:00 GMTai-engineeringragai-agentsdaniel.prinz81@gmail.com (Daniel Prinz)