For mod authors

• Packaging your mod — folder layouts and patch-file naming DDMM understands
• Manifest reference — Legacy, V1, and V2 manifest.json formats, plus JSON Schemas
• The Sources field — declaring where your mod can be found, per site, with examples
• Install button for your mod page — a one-click ddmm://install link, no extension needed

DDMM also reads the original HD2 mod manifest format (version-less manifest.json, described as Legacy in the Manifest reference) unchanged, plus its own provider-neutral Sources field layered on top — a manifest with no Sources field still works fine, and a Sources-aware manifest still works in managers that don't know about it.