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MCP Script Rules

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Atualizado 1/29/2026
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MCP Script Rules

MCP Script Rules

When working with files in scripts/:

DO

  • Use CLI arguments for all parameters (argparse)
  • Include USAGE docstring at top of file
  • Use call_mcp_tool("server__tool", params) pattern
  • Handle errors gracefully with informative messages
  • Print results to stdout for Claude to process

DON'T

  • Hardcode parameters in the script
  • Edit scripts to change parameters (use CLI args instead)
  • Import from servers/ directly (use runtime.mcp_client)

Tool Naming

Tool IDs use double underscore: serverName__toolName

Examples:

  • morph__warpgrep_codebase_search
  • ast-grep__ast_grep
  • perplexity__perplexity_ask

Testing

Test with: uv run python -m runtime.harness scripts/<script>.py --help

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