tracked prompt - builder

TRACKED PROMPT BUILDER, MANUAL ONLY. Today we infer parts of the story from source_workspace_version_id, workspace version types such as ai_draft or manual_autosave, accepted generation receipts, and the content’s broad source type. Those signals can prove positive lineage, but when they’re absent we cannot tell whether a step was intentionally manual, historically unavailable, or broken. creation_origin would make that distinction explicit for each content version.