Handoff

Spec §11.5.1 / §21.5: an OD run isn't done when the artifact exists — it's done when the artifact reaches the surface the user will keep iterating on. This atom is the "push it somewhere" stage. It's the natural counterpart to diff-review.

Inputs

• The accepted artifact set (after diff-review resolved with decision: 'accept' | 'partial').
• The export target (one of the surface enum values from ArtifactManifest.exportTargets[].surface).

Surfaces