Earendil
Earendil Inc., a Public Benefit Corporation founded by armin-ronacher and Colin Daymond Hanna in 2025, purpose stated as strengthening the agency of humanity through software and open protocols https://earendil.com/posts/announcing-pi-and-lefos/. April 2026: acquired the pi open-source project, mario-zechner joined as a major stakeholder running pi decisions with Ronacher and Hanna. Announced Lefos (public alpha) the same day, and Radius and Works follow in the product line https://earendil.com/.
On 2026-10-01 Earendil and the Pi community shipped Pi 1.0 together with Pi Durable, an experimental durable harness: tasks with checkpoints, replay-declared tools, exactly-once submissions, shared typed documents for application state, background compaction, forked conversations, per-conversation agents, live-swappable extensions, multi-client and multiplayer attachment https://earendil.com/posts/pi-durable/. The post opens by defining the harness, and its stated size, about 15,000 lines without tests, is the number 2026-10-12-youtube-indydevdan-pi-durable rounds at 24:21. Also notable: the 1.0 cycle included Pi adding MCP support, reversing Zechner’s earlier dismissal of it, with Earendil explicitly citing easier jev use as a beneficiary https://www.theregister.com/ai-and-ml/2026-10-02/pi-coding-agent-pulls-a-180-and-adds-mcp-support/5300678.
Sources
- Announcing Pi & Lefos, 2026-04-08: https://earendil.com/posts/announcing-pi-and-lefos/
- Pi Durable, 2026-10-01: https://earendil.com/posts/pi-durable/ (read in full)
- pi.dev: https://pi.dev/
- The Register on Pi 1.0 and MCP, 2026-10-01: https://www.theregister.com/ai-and-ml/2026-10-02/pi-coding-agent-pulls-a-180-and-adds-mcp-support/5300678