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Summary
• Downgrade Zod from v4.0.17 to v3.21.4 to maintain backward compatibility
Problem
The LINE Bot MCP Server v0.3.1 throws
MCP error -32603: keyValidator._parse is not a function
when usingmcp__line-bot__push_text_message
. This occurs because Zod 4.x has breaking changes where the_parse
method was renamed toparse
.#224