FounderEarendil Works · Austria

Armin Ronacher

Co-founder

Creator of Flask and early Sentry engineer who founded Earendil. His essays ("The Coming Loop", "Better Models: Worse Tools", "What is Codemode", on Pi inside OpenClaw) are among the most-discussed harness writing on HN.

X GitHub YouTube Website

Quoted in the State of Harness report

“tool schemas are not neutral, at least not on Anthropic models.”
Quoted in State of Harness — October 2026: The harness moves scores as much as the model, so users keep it portable and hedge with open source · original
“it only has four tools: Read, Write, Edit, Bash.”
Quoted in State of Harness — October 2026: Context engineering replaced prompt engineering, MCP became the default tool bus, and sandboxes became products · original

Also at

Earendil Works: Mario Zechner, Colin Daymond Hanna

Pi: Mario Zechner

Sources

github.com/mitsuhiko
lucumr.pocoo.org/2026/1/31/pi
lucumr.pocoo.org/about
lucumr.pocoo.org/2026/6/23/the-coming-loop

Verified Oct 29, 2026