Extend eve Agent Capabilities with Installable Extensions

An extension feature has been added to the eve agent framework. Tools, connections, skills, instructions, and hooks can be bundled into a single package, published to package registries like npm, and installed, version-managed, and upgraded just like regular dependencies.

Creating an extension starts with a single command.

npx eve@latest extension init crm

The generated package follows the same file structure as an agent (tools/, connections/, skills/, hooks/, etc.), and when ready, you build a distributable package with eve extension build.

To use it in an agent, you create a file in the agent/extensions/ directory and import it. The filename becomes the namespace, so the search tool from an extension imported as crm runs within the agent as crm__search.

Key features:

• Declare config schemas and get type validation using standard schema libraries like Zod
• Require approval before executing extension tools, replace tools, or remove them with disableTool()
• Refine extension tool result types in hooks using toolResultFrom