Individual skill
crestapps-core-extensible-entities
Skill for storing typed extension data on CrestApps.Core extensible entities (ExtensibleEntity, CatalogItem, AIProfile, AIDeployment, ChatInteraction and others). Covers the Properties bag and JsonExtensionDataConverter, the Put, TryGet, GetOrCreate, Get, Alter, Has and Remove extension methods with their generic constraints, key naming by type name, supplying the same metadata from configuration or recipes through the Properties object (for example AIDeploymentMetadata capabilities), and configuring ExtensibleEntityJsonOptions through the options pattern or the static ExtensibleEntityExtensions.JsonSerializerOptions. Use it when attaching custom metadata to CrestApps.Core models or troubleshooting how that metadata serializes.
src/CrestApps.AgentSkills/crestapps-core/crestapps-core-extensible-entities/SKILL.md
Source commit d86d04f234b1b2bd8145368a2544490f9d557596
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- Last checked
- Nov 6, 2026
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- Repository last updated
- Oct 21, 2026
- License
- MIT
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- agent-skills Repository topic
- ai Repository topic
- ai-agents-framework Repository topic
- dotnet Repository topic
- mcp Repository topic
- mcp-server Repository topic
- orchardcore Repository topic
- data Derived category
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# CrestApps.Core Extensible Entities
You are a CrestApps.Core expert. Generate code for typed metadata stored in `ExtensibleEntity.Properties`.
## Guidelines
- `ExtensibleEntity` (namespace `CrestApps.Core`) exposes `Properties`, an ordinal-ignore-case `IDictionary<string, object>`. `CatalogItem` derives from it, so every catalog model (profiles, deployments, connections, interactions, personas, data sources) carries a property bag.
- `Properties` serializes as a nested `Properties` JSON object through `JsonExtensionDataConverter`, which keeps JSON values as `JsonNode`. Do not replace it with `[JsonExtensionData]`; flattened root-level values are not read back as metadata.
- Use the extension methods in `ExtensibleEntityExtensions` instead of casting dictionary values.
- The default key is the type name (`typeof(T).Name`), so keep one metadata object per type. Use `Put(name, value)` and `Get<T>(name)` for explicit keys.
- Name metadata classes uniquely; two classes with the same name in different namespaces share a key.
## Methods
