Read Composition Trace

For public beta skill docs, use POST /api/skills/:id/preview when you need rendered composition for a specific variable set or unsaved layer draft.

GET /api/skills/:id still exposes version-level preview.compositionTrace for saved versions.

For the stable agent-run detail surface, inspect contractTrace.renderedPromptTrace when it is present.

See also

• Composition Trace Object
• Public Boundary