Andre Hansel

Builder. Tinkerer. Dad.

About

I build software that sits at the intersection of AI, infrastructure, and creative tooling. My current focus is on applied LLM systems — orchestrating multiple models to produce structured, high-quality output with deterministic control flow and measurable quality gates.

I run everything on a self-hosted homelab (Proxmox, Tailscale, Cloudflare Tunnel) because I like owning the stack end to end. Most of my work is in TypeScript on Bun, with Postgres as the backbone.

Projects

Novel Harness

Live

AI-assisted novel creation pipeline. Deterministic code controls flow; LLMs are leaf-node function calls. Beat-first architecture with per-beat adherence checking, continuity validation, and LoRA-tuned tonal passes.

  • Bun + TypeScript
  • Postgres
  • Multi-provider LLM (Cerebras, Groq, DeepSeek, W&B)
  • LoRA fine-tuning (W&B ART)
  • React dashboard

OpenBrain

Self-hosted personal knowledge base with AI-powered enrichment. Captures thoughts from multiple sources (Obsidian, Claude Code, MCP), chunks and enriches them with metadata extraction, then makes everything searchable via hybrid semantic + keyword search with pgvector.

  • Bun + TypeScript
  • Postgres + pgvector
  • Embeddings (text-embedding-3-large)
  • HNSW vector search
  • MCP protocol

Homelab

Self-hosted infrastructure on Proxmox. LXC containers per project, Tailscale mesh, Cloudflare Tunnels for public access, systemd services, automated deploys.

  • Proxmox
  • Tailscale
  • Cloudflare Tunnel
  • systemd

Lab

Things I'm currently exploring and experimenting with:

LLM Agent Orchestration

Multi-model pipelines with structured output, decomposed checker calls, and deterministic quality gates.

LoRA Fine-Tuning

Task-specific adapter training on Qwen 3 models via W&B Serverless SFT. Style transfer, checklist validation, structured extraction.

Multi-Provider Inference

Each agent slot independently selects the provider that wins for its shape — latency, quality, and model availability. No vendor lock-in.

Self-Hosted AI Infrastructure

Homelab-first deployment with Proxmox LXCs, Postgres, and automated CI/CD via rsync + systemd.

Contact