Gerrit API JSON response not parsing correctly due to magic prefix

[iceleaf916]

Problem

When calling Gerrit REST API endpoints, the server returns a JSON response prefixed with the security string )]}:

)]}'
{
  "id": "...",
  ...
}

This is a Gerrit security feature to prevent JSON hijacking attacks (Gerrit REST API Documentation). However, the gerrit-mcp-server does not strip this prefix before parsing the JSON, causing JSON parse errors.

Error Message

Error executing tool get_change_details: Expecting value: line 1 column 1 (char 0)

Steps to Reproduce

1. Configure gerrit-mcp-server with valid Gerrit credentials
2. Call any REST API endpoint, e.g.:

   mcporter call 'Gerrit.get_change_details(change_id:"324339")'
   

3. Observe JSON parsing error

Expected Behavior

The MCP server should strip the )]} prefix from Gerrit API responses before parsing the JSON.

Actual Behavior

The MCP server fails to parse the JSON response because of the )]} prefix.

Environment

• gerrit-mcp-server: used via uvx gerrit-mcp-server
• Gerrit instance: UnionTech Gerrit (gerrit.uniontech.com)
• Authentication: HTTP Basic Auth

Possible Fix

Strip the )]} prefix from the response body before JSON parsing, or use the Gerrit CLI/Go library which handles this automatically.