MCP-REPL

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astgrep_replace

Transform code by matching and replacing AST patterns in specified files. Supports multiple languages, preview mode, and interactive confirmation for secure and precise modifications.

Instructions

Code transformation using ast-grep rewrite patterns

Input Schema

Name	Required	Description
`dryRun`	No	Preview changes without applying them
`interactive`	No	Interactive mode for confirmation
`language`	No	Programming language
`paths`	No	Specific paths to transform
`pattern`	Yes	AST pattern to match
`replacement`	Yes	Replacement pattern
`workingDirectory`	No	Optional working directory for the operation (defaults to server working directory)

Input Schema (JSON Schema)

{
  "properties": {
    "dryRun": {
      "description": "Preview changes without applying them",
      "type": "boolean"
    },
    "interactive": {
      "description": "Interactive mode for confirmation",
      "type": "boolean"
    },
    "language": {
      "description": "Programming language",
      "type": "string"
    },
    "paths": {
      "description": "Specific paths to transform",
      "items": {
        "type": "string"
      },
      "type": "array"
    },
    "pattern": {
      "description": "AST pattern to match",
      "type": "string"
    },
    "replacement": {
      "description": "Replacement pattern",
      "type": "string"
    },
    "workingDirectory": {
      "description": "Optional working directory for the operation (defaults to server working directory)",
      "type": "string"
    }
  },
  "required": [
    "pattern",
    "replacement"
  ],
  "type": "object"
}

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