Agent Starters

A named, reusable per-seat starting point. Composes an agent role, startup context, optional native session source, and provenance into something a user or rig can choose when creating, refreshing, or packaging a seat.

This registry-backed startup context is distinct from the rig agent-image surface and from a VM image. See the current behavior below before treating optional session provenance as an executable native session source.

Use this when

• Creating a new seat from a known-good starting context.
• Refreshing a seat with rig expand and starter_ref.
• Authoring a new starter (registry entry).
• Inspecting an existing starter's provenance, freshness, or recommended status.
• Promoting / deprecating starters in the registry.
• Composing a starter with a Composable Priming Pack (record manifest id/version, runtime, source session id or transcript path, ready-check evidence, freshness state).