Earendil releases Pi 1.0 agent harness with default MCP support
Earendil announced the launch of Pi 1.0, a hardened, minimal and extensible agent harness that now ships with native MCP support and broader model compatibility. The team says hundreds of thousands of users worldwide run Pi weekly, and feedback from issues and pull requests guided months of hardening and feature addition. Pi 1.0 adds Codemode for MCP and non‑LLM models such as Jev and image…
Key points
- Pi 1.0 ships with native MCP support, Codemode, and extensions for virtual and non‑LLM models
- Pi Durable is an experimental package for long‑running agentic applications, sharing Pi’s minimalism
- Both releases are MIT‑licensed, installable via curl (Linux/macOS) or npm (Windows)
Alongside Pi 1.0, Earendil introduced an experimental package called Pi Durable, aimed at longer‑running agentic applications. Pi Durable keeps Pi’s minimalism while extending durability, allowing builders to steer underlying intelligence with fine‑grained control. Both Pi 1.0 and Pi Durable are MIT‑licensed, installable via curl or npm, with documentation on pi.dev and source code on GitHub.
The release positions Pi as a stable, community‑driven platform for developers building AI‑powered agents, while the durable substrate targets more complex, multi‑step workflows.
Model page: Jev →
Pi 1.0 released - MCP support now included by default
earendil.com · 2 October 2026
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