Case Studies
Automation, integrations, accounting systems, and open-source engineering.
A CLI for a supplier portal built for clicks
A public command-line tool lists and downloads Hamberger supplier PDFs with OIDC login, secure token caching, filters, ZIP export, and safe re-runs.
My first merged open-source contribution: a streaming LLM provider
A merged Rust worker added OpenCode Go Chat Completions, SSE streaming, model discovery, tool calls, structured output, and router integration to iii.
Payout evidence belongs with the voucher
A scheduled n8n workflow matches payout PDFs to Lexware card vouchers, handles ambiguity explicitly, and records every attachment result.
Accounting automation that refuses to guess
A fail-closed n8n system reconciles daily SumUp activity before it creates or verifies the matching Lexware revenue documents.
From supplier PDF to an idempotent Lexware invoice
An n8n workflow reads Hamberger supplier PDFs from Google Drive, preserves printed 7% and 19% tax buckets, creates the right Lexware document once, and attaches the source PDF.
From a public legal guide to a helpful next step
A plain-language article about photo-enforced traffic tickets became a careful intake and guidance workflow for people looking for a place to start.