forCopilotFormat only checked for type == "stdio" to add back args,
missing the case where a server already has type = "local" (e.g. set
directly by a third-party module). This caused args to be absent in the
generated mcp-config.json, failing validation.
Also, running forCopilotFormat as an extraTransform meant it ran inside
transformMcpServer, which then filtered out args = [] in its cleanup
pass. Move forCopilotFormat to run after transformMcpServer so the
empty args list is preserved in the output.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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