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Appendix A3 — Contributors

Rhiza and its ecosystem are built by a small group of people. The current core repositories are rhiza, rhiza-claude, rhiza-task, rhiza-hooks, pytest-rhiza, and rhiza-brainbug — the last three of those did not all exist a year ago, and rhiza-task and pytest-rhiza now hold content that used to live inside rhiza itself (Lesson 11). The archived rhiza-cli and rhiza-tools were core repositories earlier in the project's life, and the counts below still include the work that went into them. This page lists every human contributor with their GitHub profiles and contribution counts.

Contribution counts reflect commits to the default branch, refreshed 29 August 2026. Automated commits from Renovate, Dependabot, Copilot, and other bots are excluded.

Thomas Schmelzer · tschm

Quant, Rhodes scholar, mathematician, coder, cyclist, angel investor. Stanford · ex-Team Q @ ADIA · Palo Alto & Abu Dhabi

Thomas is the creator and principal maintainer of Rhiza. The idea was born during his time on Team Q at the Abu Dhabi Investment Authority (ADIA), one of the world's largest sovereign wealth funds, where he had direct exposure to the repo zoo problem at institutional scale. The experience of watching dozens of Python repositories drift apart — each maintained by different teams, each a different vintage of CI configuration — made the need for a continuous synchronisation system undeniable.

He later spent time as a Visiting Scholar at Stanford with Professor Stephen Boyd's group (the CVXGRP), which is also why cvxgrp/simulator — one of Boyd's group's tools — became an early external adopter of Rhiza.

Repo Contributions
rhiza 1,187
rhiza-cli (archived) 289
rhiza-task 215
rhiza-hooks 194
rhiza-claude 167
rhiza-tools (archived) 162
pytest-rhiza 93
rhiza-brainbug 31
Total 2,338


Harry Campion · HarryCampion

Harry is the second-largest contributor to the ecosystem and has been involved across every repo. His contributions span rhiza-tools (where he and Thomas are near-equal co-authors) through to the core template repo and the CLI.

Repo Contributions
rhiza 132
rhiza-tools (archived) 50
rhiza-cli (archived) 31
rhiza-hooks 14
Total 227


Mark Richardson · markrichardson

Repo Contributions
rhiza 15
Total 15


Gedas Stanzys · gesta81

Gedas contributed fixes to the core rhiza template repo.

Repo Contributions
rhiza 3
Total 3


Armaan · armaanPy

London

Armaan contributed to the core rhiza template repo.

Repo Contributions
rhiza 1
Total 1


Ashley Cottrell · cottrellashley

Repo Contributions
rhiza 1
Total 1


ded-furby · ded-furby

Contributed to rhiza-hooks.

Repo Contributions
rhiza-hooks 1
Total 1


Contributing

Rhiza is open source and welcomes contributions. The best entry points are:

Back to: Lesson 12 — Further Reading | README