What is the best way to verify a fix for an SDK bug?

Use the guide's verification strategy: verify the immediate return value, simulate the SDK's internal serialization logic, and then test the full end-to-end workflow.

How do I find the root cause of an SDK error if it's hidden?

The guide recommends checking full error tracebacks in logs/errors.log and using grep to find specific serialization or type errors that user-facing messages might hide.

Why am I getting JSON serialization errors with MCP servers?

This typically happens when the SDK fails to strip non-serializable objects (like Server instances). This guide helps you verify identification keys like 'type=sdk' so the internal stripping logic triggers correctly.

Why does TypedDict matter for debugging the Claude SDK?

TypedDict is not enforced at runtime in Python. If your keys are slightly off, the error won't happen at the assignment but much later inside the SDK's internal processing logic.

Claude SDK Debugger

Name: Claude SDK Debugger
Author: WarrenZhu050413

byWarrenZhu050413

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安全与测试

Diagnoses and resolves complex Claude Agent SDK errors, TypedDict contract mismatches, and MCP server serialization failures.

This skill provides a comprehensive framework for debugging internal Claude Agent SDK issues and Model Context Protocol (MCP) server configurations. It moves beyond superficial error messages by teaching developers how to interpret full tracebacks, locate SDK source code within virtual environments, and verify internal processing logic. By focusing on runtime TypedDict contracts and JSON serialization patterns, it helps resolve cryptic 'not JSON serializable' errors and parameter mismatches that often occur when building custom Claude integrations.

主要功能

01Step-by-step patching checklist for SDK internal bug fixes

02MCP server configuration and serialization troubleshooting

03TypedDict contract verification and mapping strategies

045 GitHub stars

05Traceback analysis for deep-stack SDK error identification

06SDK source code inspection workflows for local environments

使用场景

01Debugging internal SDK processing failures during agent initialization

02Resolving runtime TypedDict mismatches in ClaudeAgentOptions

03Fixing 'Object of type Server is not JSON serializable' errors in MCP setups

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add warrenzhu050413/warren-claude-code-plugin-marketplace claude-sdk-debug

For use in Claude.ai and ChatGPT

Download Skill

主要功能

01Step-by-step patching checklist for SDK internal bug fixes

02MCP server configuration and serialization troubleshooting

03TypedDict contract verification and mapping strategies

045 GitHub stars

05Traceback analysis for deep-stack SDK error identification

06SDK source code inspection workflows for local environments

使用场景

01Debugging internal SDK processing failures during agent initialization

02Resolving runtime TypedDict mismatches in ClaudeAgentOptions

03Fixing 'Object of type Server is not JSON serializable' errors in MCP setups

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add warrenzhu050413/warren-claude-code-plugin-marketplace claude-sdk-debug

For use in Claude.ai and ChatGPT

Download Skill