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Output from azd version
N/A - registry metadata issue before release publication.

Describe the bug
The azure.ai.agents extension manifest declares service-target providers for azure.ai.project, azure.ai.connection, and azure.ai.toolbox, but those hosts are owned by the split Foundry extensions. If the release registry is generated with those duplicate declarations, azd cannot deterministically resolve which extension owns each service-target provider.

To Reproduce
Generate or inspect extension registry metadata from the current Foundry extension manifests and compare service-target providers across azure.ai.agents, azure.ai.projects, azure.ai.connections, and azure.ai.toolboxes.

Expected behavior
Each service-target provider should be declared by exactly one extension in the release registry. azure.ai.agents should only declare the service-target provider it actually owns: azure.ai.agent.

Environment
Information on your environment:
* Language name and version: N/A
* IDE and version : N/A

Additional context
This blocks the final extension registry update because duplicate service-target provider declarations would make host ownership ambiguous.