Design is the source area for TH1 design documents. Prefer HTML for durable design documents so they can be opened directly and embedded in the Dashboard.

Structure

final/mechanics/: completed or accepted game-mechanic designs.
final/narrative/: completed or accepted worldbuilding, story, copywriting, and flavor text designs.
drafts/: work in progress, discussion notes, temporary records, and planning material.
art/: art direction and asset planning.
audio/: music and sound direction.

Dashboard-backed operational data belongs in DOC/. Engineering architecture belongs in MD/.

Authority Rules

Design/final/ is the source of truth for accepted design.
DOC/devmissiondoc/ is for implementation breakdowns, DataAsset checklists, resource warnings, and engineering task slices. It must cite the relevant Design/final/ source and must not introduce conflicting gameplay rules.
If a file in Design/final/ is superseded, replace it with a short deprecation pointer and move the old content to Design/drafts/.
For Hakurei Empire / Viking mechanics, use Design/final/mechanics/hakurei-empire-authoritative.md.