Composition Trace

The composition trace captures how prompts were assembled: layer ordering, append vs replace behavior, and structured blocks for debugging. It appears in:

• Skill version preview — skillVersionSchema.preview.compositionTrace
• Run contract trace — renderedPromptTrace / block data in buildRunContractTrace (runs.ts)

Use it when rendered output does not match expectations (wrong layer, missing variable substitution).

See also

• Composition Trace
• Read Composition Trace