HarmonyOS Development

📌 Planned placeholder page: this subtopic collects HarmonyOS app development topics (ArkTS, ArkUI, Stage model, engineering and release), and content will be filled progressively (the Chinese main site already contains 5 complete pages).

Planned Content

• [ ] ArkTS language and state management
• [ ] ArkUI declarative UI
• [ ] Stage app model and system capabilities
• [ ] Engineering, signing and AGC release

Next Steps

• [ ] Complete against the planning checklist in the Area Overview
• [ ] Change the status from "Planned" to "Collected" when done

For writing guidelines, please refer to the Area Overview.