Filtering exposed types

When to use this

Your module has many public classes but you only want a subset callable remotely — for security, API surface control, or MCP exposure.

Prerequisites

• Installed GG
• Know the fully qualified type names (FQN) of types to expose

Pass --types with a facade FQN so Vision and generated Grafts expose only the surface you intend.

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Steps

1. Identify type names

Examples by language:

2. Pass --types to GG

Comma-separated list, no spaces unless part of the name:

./gg ./MyLib.dll --types MyCompany.Api.OrderFacade,MyCompany.Api.CatalogFacade --port 8888

Only public methods on the listed types are included in the Unified Graft Model and reachable through Grafts and MCP.

3. Facade pattern (recommended)

Create a single static facade class with static methods that delegate to internal services. Expose only that facade:

./gg ./MyLib.dll --types MyCompany.Api.PublicFacade --port 8888

This keeps internal types private by language visibility rules — they never enter the UGM.

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Verify it works

• Graftcode Vision lists only the filtered types
• Generated Graft contains only methods from those types
• Internal types are not callable remotely

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Common mistakes

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See also

• Public interface vs business logic
• MCP: expose tools
• Alpha limitations (filtering was listed as alpha workaround — now a first-class how-to)