Refactor to use official TypeScript SDK

[MariaChrysafis]

Refactor to use official TypeScript SDK

Summary

This PR completely replaces the yukifoo implementation with the official @anthropic-ai/claude-code TypeScript SDK. The change introduces a Node.js bridge architecture where the Go SDK communicates with the TypeScript SDK via JSON over stdin/stdout, while maintaining full API compatibility with the existing Go interface.

Key Changes:

• Module Path: Updated from github.com/yukifoo/claude-code-sdk-go to github.com/anthropic-ai/claude-code-sdk-go
• Architecture: Replaced CLI wrapping with Node.js process bridge communicating via JSON
• Bridge Implementation: Created bridge/claude-bridge.js that wraps the official TypeScript SDK
• Option Mapping: Implemented mapping between Go SDK options and TypeScript SDK options
• Error Handling: Updated all error messages and types to reflect Node.js bridge architecture
• Setup: Added scripts/setup.sh for easy Node.js dependency installation

Review & Testing Checklist for Human

⚠️ HIGH RISK CHANGE - Complete architectural overhaul requires thorough testing

• End-to-End Functionality: Test real Claude queries with various options (streaming/non-streaming, different models, tool restrictions, MCP configuration)
• Option Mapping Verification: Verify that all Go SDK options correctly map to TypeScript SDK behavior (especially SystemPrompt/customSystemPrompt, Resume/sessionId, MCP configurations)
• Message Format Compatibility: Ensure all message types (AssistantMessage, UserMessage, SystemMessage, ResultMessage) parse correctly from TypeScript SDK responses
• Error Scenarios: Test error handling (invalid paths, Node.js not installed, bridge failures, malformed requests)
• Cross-Platform Setup: Verify scripts/setup.sh works correctly and Node.js dependencies install properly

Notes

Requestor: Maria Chrysafis (@MariaChrysafis)
Devin Session: https://app.devin.ai/sessions/4b8df1265bc841c3957e242a19642576

Critical Implementation Details:

• The bridge maps Go's SystemPrompt → TypeScript's customSystemPrompt
• Session management uses Resume → sessionId mapping
• MCP server configuration format changed from slice to map structure
• All tests passing and linting clean, but limited to unit tests - integration testing needed

Breaking Changes for Users:

• Now requires Node.js (version 16+) as runtime dependency
• Must run ./scripts/setup.sh or cd bridge && npm install after installation
• Import path changed (though this was expected as part of moving away from yukifoo)

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