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Lead DevelopmentFACT · 4/5•2 Oct '26•Via Trending Topics (DACH/CEE Innovation & Tech)

Pi 1.0: Austrian AI Agent Harness Hits Hacker News Top

Earendil, the Austrian AI company founded by Armin Ronacher, has released Pi 1.0, an open-source AI agent harness. The release quickly reached the top of Hacker News with over 1,000 points. Pi 1.0 introduces native Model Context Protocol (MCP) support via a new 'Codemode' JavaScript environment, along with virtual models, on-demand tool loading, cache warming, and a full-screen terminal UI. The company also launched Pi Durable, an experimental framework for long-running AI agents with checkpointing and parallel conversation branching. Pi was originally created by Mario Zechner and acquired by Earendil in spring 2026. Earendil reports hundreds of thousands of weekly users and over 45,000 GitHub stars. The core remains MIT-licensed, with potential paid add-ons. Investors include Accel and Balderton, with founders from n8n, Revolut, Sentry, and Slack.

•Earendil released Pi 1.0, an open-source AI agent harness, which hit #1 on Hacker News with over 1,000 points.
•Pi 1.0 adds native Model Context Protocol (MCP) support via new Codemode JavaScript environment, along with virtual models and other features.
•Earendil launched Pi Durable, an experimental framework for long-running AI agents with checkpointing and parallel conversation branching.

Entities:Anthropic OpenAI TypeSafe AI Accel Balderton Sentry Slack Revolut n8n OpenClaw

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