v2025.12.4

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Released on 2025.12.19

Enhancements

MCP Provider

Improved Error Format Handling

Tool calls now return proper JSON RPC errors instead of tool result errors when upstream MCP servers are unavailable. This enables AI agents to better understand the nature of failures and make informed decisions about whether to retry requests.

Invalid Session Handling

When a client makes a tool call with an invalid Mcp-Session-Id, the proxy now returns an explicit error indicating the session is invalid.