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1.21.1

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@github-actions github-actions released this 10 Aug 09:47

Added

  • Added support for Agent Plugins v1.0.0 installed from public GitHub repositories.
  • Added commit-pinned installation, update checks, enable/disable controls, and uninstallation.
  • Added namespaced plugin skills to prevent naming conflicts.
  • Added support for plugin-provided Streamable HTTP MCP servers.
  • Plugin MCP servers are activated only while a skill from the same enabled plugin is active.

Improved

  • Updated MCP Apps to use the ui/initialize handshake and ui/notifications/tool-result.
  • Added support for MCP App resource URIs declared in tool metadata.
  • Added structured tool-result content support.
  • Improved MCP App rendering for remote stylesheets and scripts in Obsidian’s Electron environment.
  • Added host-managed Content Security Policy generation from declared resource, connection, frame, and base URI domains.