[Manohar Paturi (ManoharPaturi)]

Motivation & Context

agent_schema_dispatch contained two case "model" branches. The first returned a ModelResource, making the branch returning a Model unreachable dead code, so a model specification carrying its actual fields (provider, apiType, connection, options) raised a TypeError and no input shape could load a Model through the dispatch.

Description & Review Guide

• What are the major changes? The duplicate branch is removed and the single model case now dispatches by shape: a schema carrying any model specification field loads as a Model, with the kind tag dropped before construction, and everything else keeps loading as the model resource exactly as the existing dispatch tests pin.
• What is the impact of these changes? Model specifications become loadable through the exported dispatch while resource shaped payloads are unaffected, including the name plus id form covered by the current tests.
• What do you want reviewers to focus on? The discriminator set (provider, apiType, connection, options) covering every field unique to the model specification, so neither class can capture the other's payloads.

Related Issue

Fixes #9866

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Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR links to an agreed issue with no competing open PR, or the Related Issue section documents a trivial-change or repository-automation exception.
• This is not a breaking change. If it is a breaking change, add the breaking change label (or add "[BREAKING]" to the title prefix, before or after any language prefix) — a workflow keeps the label and title prefix in sync automatically.

[Manohar Paturi (ManoharPaturi)]

Understood, sorry for racing ahead of the review process. #9866 now uses the bug report template with the dispatch reproduction, and this stays closed until the team agrees.