Artifact Parts

artifact_part records a meaningful unit inside an artifact. A part can be a document block, table, transcript segment, image, slide, file, code patch, annotation, or source appendix.

Part rules

• part_id must be stable inside the artifact.
• part_type describes structure, not visual styling.
• order is a logical order, not a DOM layout system.
• Every part should have fallback text or a byte ref when possible.
• Source links should be part-addressable.

Why parts matter

Parts let systems update one section, diff two versions, cite a source, redact one range, render a thumbnail, or review a transcript segment without rewriting the entire artifact.