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Ben Holmes Releases Hubble, a Free Open-Source Markdown App for Agents

  • AI Agents
  • Open Source
  • Software Dev & Coding

Ben Holmes, an Astro core maintainer and Warp's DevEx lead, has released Hubble, a free and open-source Markdown note-taking app built for real-time collaboration with AI agents. Announced on June 23, 2026, the desktop app pairs live-reloading—so edits an agent makes to local notes appear instantly—with the ability to embed interactive HTML apps inside notes. The project is available at hubble.md with source on GitHub.

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