Extensions

The hub. Everything you add to Zeph — the voice, the model, the apps, the skills — and where each one plugs in.

Everything you add to Zeph is an extension: the voice that hears you, the model that answers, the app on the device, the skill you hand to a coding agent. Five kinds — and each one plugs in its own way.

One companion, five verbs

The companion

routes toProvider
Speech in, answers out.
acts throughConnector
Into one of your accounts.
callsTool
Over MCP.
installsApp
Onto the device.
copies intoSkillLeaves Zeph
Out to another agent.

Five kinds, five verbs — the verb is what tells them apart. Four point inward; a skill leaves Zeph.

The five kinds

Provider

A source of AI — speech, models. The system routes to it.

Connector

A door into an account — Gmail, Calendar, Slack — an app acts through.

Tool

An MCP server the assistant calls.

App

Code you install and open on the device.

Skill

Instructions that teach an agent a task.

An app can bring its own skills

An app's package can carry skills of its own — the instructions that teach an agent to drive it. They show up in your Library alongside the rest, marked with the app that added them, ready to install into the agent you choose.