I build the production LLM, voice, and security systems businesses run on. Co-founder of MYG Media, Vienna. Anthropic Claude Certified Architect.

Bugs I found and fixed in libraries much of the ecosystem ships, each reproduced on the published release with a failing-then-passing test and merged by the maintainers:

PostCSS and its parser tests (merged by its author Andrey Sitnik) · immer (by Mark Erikson) · jose (by Filip Skokan) · Cloudflare workers-sdk · commitlint · PapaParse · js-base64

More in review at highlight.js, multiformats, firecrawl/pdf-inspector, and others. Most were found by testing a library against the thing it claims to obey (an RFC, a reference implementation, exact arithmetic) rather than against its own test suite.

Urfael · a blast-radius-first AI assistant. Zero TCP ports, untrusted turns run no-egress and read-only, plugins load in a --network none container. npm run security attacks the live daemon and prints a table: 11/11 real-world attack classes resisted, ~1,400 tests, zero runtime deps.

consilium · deterministic orchestration for LLM agent councils: fan out independent hypotheses, adversarially refute each, converge on the survivors. Zero deps, model-agnostic, every pattern unit-testable with a mock.

Rustchain · a blockchain from scratch in Rust: heaviest-work consensus with difficulty retargeting and median-time-past, real TCP peer-to-peer, canonical hashing, property + fuzz + multi-node tests, a threat model, 115 tests, clippy clean at -D warnings.

Also: Forge (local GPU AI media tooling), BrainVault, OpenBuild, Code Translator.

TypeScript Python Rust · Node Next.js Electron Tauri · MCP servers and agentic systems, RAG, ElevenLabs voice · post-quantum readiness (FIPS 203/204/205), agent red-teaming, sandbox and capability design

_{Vienna, Austria · English / German / Russian · Overwatch Top 500, former pro-league competitor}