MCP config: streamableHttp transport type fails schema validation in /doctor

Summary

When a .mcp.json file contains an MCP server entry with "type": "streamableHttp", the /doctor command reports a schema validation error even though streamableHttp is a valid MCP transport type per the spec.

Steps to Reproduce

1. Create a .mcp.json with a streamableHttp server entry:

``json
{
"mcpServers": {
"unity": {
"type": "streamableHttp",
"url": "http://localhost:27183/mcp/"
}
}
}
``

1. Run /doctor in Claude Code

Expected Behavior

streamableHttp should be recognized as a valid transport type, or at minimum the error message should clarify that it is not yet supported.

Actual Behavior

[Failed to parse] Project config (shared via .mcp.json)
 └ [Error] mcpServers.unity: Does not adhere to MCP server configuration schema

Environment

• Claude Code CLI
• Platform: Linux (Ubuntu 24.04)
• The streamableHttp transport is part of the MCP spec but appears to not be supported by Claude Code's config schema validator