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ModernUO/dev-docs/claude-skills/migrate-from-runuo/migrate-items-mobiles.md
Kamron Batman 4f9bc1d9f6
feat: Adds AI skills to migrate from RunUO (#2366) 
## Summary

Adds comprehensive RunUO → ModernUO migration documentation and Claude AI skills to help shard owners and script authors convert RunUO 2.7 code to ModernUO.

- **10 migration skills** (`dev-docs/claude-skills/migrate-from-runuo/`) — system-by-system conversion guides (foundation, serialization, timers, gumps, packets, property lists, commands/events, persistence, items/mobiles, systems/engines)
- **12 reference docs** (`dev-docs/runuo-migration-docs/`) — deep-reference with before/after examples, API mapping tables, edge cases, and gotchas
- **Updated existing skills** — `modernuo-timers`, `modernuo-serialization`, and `modernuo-threading` now document that `Serialize()` runs on background threads and timers are not thread-safe
- **Updated `CLAUDE.md`** — added migration skill lookup table

### Key migration patterns covered
- Manual `Serialize()`/`Deserialize()` → source-generated `[SerializableField]`
- `Packet` class hierarchy → static `SpanWriter`/`SpanReader` methods
- `Timer` subclasses → `TimerExecutionToken` fire-and-forget
- `Gump` → `StaticGump<T>`/`DynamicGump` with builders
- `EventSink.WorldSave` → `GenericPersistence`
- `ObjectPropertyList` → `IPropertyList` with string hole rules
- Universal changes: naming (`m_` → `_`), `[Constructable]` → `[Constructible]`, logging, spatial queries
2026-03-13 00:33:45 -07:00

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name description
migrate-items-mobiles Trigger: when converting RunUO Item, Mobile, or BaseCreature subclasses to ModernUO. Most common migration task. Covers: complete item/creature conversion combining serialization, timers, properties, naming.

RunUO -> ModernUO Item/Mobile/Creature Migration

When This Activates

  • Converting any Item subclass from RunUO
  • Converting any Mobile/BaseCreature subclass
  • This is the most common migration task -- combines all other systems

Item Conversion Checklist

  1. Foundation: file-scoped namespace, using ModernUO.Serialization;
  2. Class: add [SerializationGenerator(0, false)], add partial
  3. Fields: m_X -> [SerializableField(N)] _x with [SerializedCommandProperty]
  4. Add [InvalidateProperties] where RunUO setter called InvalidateProperties()
  5. Delete: Serial constructor, Serialize, Deserialize
  6. [Constructable] -> [Constructible]
  7. Name = "text" -> public override string DefaultName => "text";
  8. Timers: nested class -> Timer.StartTimer() + TimerExecutionToken + [AfterDeserialization] + OnAfterDelete
  9. Properties: GetProperties(ObjectPropertyList) -> GetProperties(IPropertyList), apply string hole rule
  10. Context menus: List<ContextMenuEntry> -> ref PooledRefList<ContextMenuEntry>

Creature-Specific Changes

  • [CorpseName("...")] attribute -> public override string CorpseName => "...";
  • BaseCreature(AI, Fight, 10, 1, 0.2, 0.4) -> BaseCreature(AI, Fight) (extra params default)
  • Name = "text" -> public override string DefaultName => "text";
  • Expression-bodied overrides: public override int Meat { get { return 1; } } -> public override int Meat => 1;

Anti-Patterns

  • Using _field-- instead of Property-- (bypasses MarkDirty tracking)
  • Forgetting [AfterDeserialization] for timer restoration
  • Forgetting OnAfterDelete() for timer cancellation

See Also

  • dev-docs/runuo-migration-docs/09-items-mobiles-creatures.md -- detailed migration with before/after examples
  • dev-docs/content-patterns.md -- ModernUO content templates
  • dev-docs/claude-skills/modernuo-content-patterns.md -- ModernUO content skill
  • dev-docs/claude-skills/modernuo-serialization.md -- serialization patterns
  • dev-docs/claude-skills/modernuo-timers.md -- timer patterns