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Achievement: Pull SharkAchievement: Quickdraw

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louisdeconinck/README.md

I build data-intensive products, developer tooling, and automation. I’m a co-founder of Signumi, where I work on company data, entity resolution, search, APIs, and developer infrastructure.

Open source

I maintain HarnessFacts, an open compatibility test suite for coding agents, and contribute upstream across developer tooling, infrastructure, Python, Rust, and .NET projects.

I tend to work on focused bug fixes, regression coverage, reliability issues, and developer tooling. I try to reproduce the problem clearly, keep changes reviewable, add tests where appropriate, and follow each project’s contribution policies. Over 100 meaningful contributions of mine have been merged.

What I work on

  • Data platforms, entity resolution, search, and large-scale data processing
  • Python, TypeScript, Rust, Go, SQL, and modern web systems
  • APIs, backend infrastructure, developer tooling, and automation
  • Observability, reliability, testing, and maintainable software

Projects

  • HarnessFacts — reproducible, evidence-backed compatibility tests for coding agents and their surrounding tooling
  • Signumi — company intelligence and data infrastructure for European private markets

I’m especially interested in open-source issues where a focused fix, stronger test coverage, or clearer implementation can remove friction for other developers.

Pinned Loading

  1. harnessfacts harnessfacts Public

    Open compatibility test suite for coding agents. Evidence-backed tests for instructions, skills, MCP, Git and CI.

    TypeScript 1

  2. trailofbits/polyfile trailofbits/polyfile Public

    A pure Python cleanroom implementation of libmagic, with instrumented parsing from Kaitai struct and an interactive hex viewer

    Python 390 31

  3. dagucloud/dagu dagucloud/dagu Public

    Self-hostable workflow orchestrator for teams whose main work isn't orchestration. Declarative YAML over your scripts, SSH commands, containers, etc; keep workflows separate from business logic. On…

    Go 4k 333

  4. dotnet/extensions dotnet/extensions Public

    This repository contains a suite of libraries that provide facilities commonly needed when creating production-ready applications.

    C# 3.2k 894

  5. mxsm/rocketmq-rust mxsm/rocketmq-rust Public

    🚀Apache RocketMQ build in Rust🦀. Faster, safer, and with lower memory usage. ⭐ Star to support our work❤️!

    Rust 1.5k 257

  6. pytest-dev/pytest-rerunfailures pytest-dev/pytest-rerunfailures Public

    a pytest plugin that re-runs failed tests up to -n times to eliminate flakey failures

    Python 474 106