Maintain

These pages concern changes to @dg/ui itself, not applications built with it.

• Toolkit evolution: stability, version policy, the maintenance process and release checks.
• Reference document format: Markdown extraction contract for components, foundations and section indexes.
• Independent agent evaluation: briefs and criteria for measuring documentation usability.
• Toolkit changes: public changes and migrations by version.

The package instructions describe maintenance ownership; workspace checks are the command reference.