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Unofficial Claude Code SDK for Ruby — Now with MCP + Streaming Support

by Marcus S —

Just published a new Ruby gem claude_code — an unofficial SDK for working with Anthropic’s Claude Code via Ruby. It wraps the Claude CLI and supports:

  • 🧠 Basic and streaming prompts (via stdin)
  • 🔁 Multi-turn conversation management
  • 🧰 Tool execution (Read, Write, Bash, etc.)
  • 🌐 Plug-and-play with MCP servers (just pass a hash of names + URLs)
  • ☁️ Cloud support via AWS Bedrock & Google Vertex AI
  • 🧪 JSONL input for batched prompts, structured assistant output, and cost reporting
  • 🛠 CLI failure handling, custom working directories, and full error classes

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