Release v0.18.0 - 2026-10-31

Highlights

• The MCP server now connects using standard newline-delimited JSON-RPC over stdio.
• Akuma clarification questions return as normal follow-up results, with the token and choices available to your MCP client.
• Sign-in return links are validated to keep redirects within the Kaizen site.

SDK + MCP Changes

MCP Server

• MCP server v0.16.0 supports protocol version 2025-06-18, preserves request IDs without numeric rounding, and reports malformed requests with JSON-RPC errors.
• Non-JSON API errors retain their HTTP status without including the raw response body.

Breaking Changes

• Custom clients using Content-Length framing must switch to newline-delimited JSON-RPC. Use a client that supports MCP protocol 2025-06-18.
• Incoming messages are limited to 1 MiB, excluding the line terminator. An oversized message returns an invalid-request error and ends the session.
• Valid needs_clarification results no longer set isError. Check the result status to present the question and choices.

Migration Notes

• Install the updated server with go install github.com/kaizen-ai-systems/mcp-server@v0.16.0, then restart your MCP client.

Documentation Updates

• MCP documentation now describes the stdio format, input limits, and clarification follow-up behavior.