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Leo's open source stuff

Leo's open source stuff

Leo Simons

Hi there 👋! I’m Leo, a CTO at Schuberg Philis in The Netherlands.

I help teams to deliver quality software, fast. 😄

Most new code in my account is authored by or co-authored with AI. See @lsimons-bot.

Section titled “Featured”

Caseum

A simple approach to software architecture that combines multiple views to boost understanding and empathy across roles.

Agent Engineer

A course for software engineers on the fundamentals of AI agents and how to build them with Claude.

MDD

MDD Does Docs - bi-directional sync from markdown to Confluence and SharePoint.

lsimons-skills

My agent skills, vendored and namespaced.

My stuff

Section titled “My stuff”

My public projects on GitHub:

  • caseum - Caseum software architecture method
  • lsimons-dotfiles - Homedir setup for @lsimons (and @lsimons-bot)
  • lsimons-skills - My agent skills, vendored and namespaced
  • lsimons-template-doc - Template for documentation sites with Astro Starlight and Quarto
  • lsimons-template-go - Generic Go CLI template repository for my personal projects
  • lsimons-template-mono - Project template for polyglot monorepo (Python + TypeScript + Go + Rust) with mise
  • lsimons-template-py - Generic template repository for my personal projects
  • lsimons-template-rs - Project template for Rust CLI + library projects with clap, strict clippy, and assert_cmd tests
  • lsimons-template-ts - Project template for TypeScript/JavaScript projects with Biome, Vitest, and native Node TS support
  • mdd-wrapper - Reference wrapper for MDD: a GitHub mirror backend behind the MirrorBackend seam.

Work stuff

Section titled “Work stuff”
  • LAB271 - some open source code from my team, the innovation space of Schuberg Philis.
  • Schuberg Philis - some open source code from my company.

Old stuff

Section titled “Old stuff”
  • tlm (retired) - Type-Link-Model, a simple modelling technique inspired by Object Role Modelling. Now archived; for fact-based modelling, use LinkML instead.
  • Apache Avalon / Apache Excalibur - Java software for component and container programming that pioneered design patterns such as Inversion of Control (IoC) and Separation of Concerns (SoC). I worked on them for many years and made a GitHub archive of their Subversion code.