Edit File LinesSAFE

A TypeScript-based MCP server that provides tools for making precise line-based edits to text files within allowed directories.

Features

Main Editing Tool

edit_file_lines

Make line-based edits to a file using string or regex pattern matching. Each edit can:

• Replace entire lines
• Replace specific text matches while preserving line formatting
• Use regex patterns for complex matches
• Handle multiple lines and multiple edits
• Preview changes with dry run mode

Example file (src/components/App.tsx):

// Basic component with props
const Button = ({ color = "blue", size = "md" }) => {
return Click me;
};

// Component with multiple props and nested structure
export const Card = ({
title,
subtitle = "Default subtitle",
theme = "light",
size = "lg",
}) => {
const cardClass = `card-${theme} size-${size}`;

return (

{title}
{subtitle}

);
};

// Constants and configurations
const THEME = {
light: { bg: "#ffffff", text: "#000000" },
dark: { bg: "#000000", text: "#ffffff" },
};

const CONFIG = {
apiUrl: "https://api.example.com",
timeout: 5000,
retries: 3,
};

Example Use Cases

1. Simple String Replacement

{
"p": "src/components/App.tsx",
"e": [{
"startLine": 2,
"endLine": 2,
"content": "primary",
"strMatch": "blue"
}],
"dryRun": true
}

Output:

Index: src/components/App.tsx
===================================================================
--- src/components/App.tsx        original
+++ src/components/App.tsx        modified
@@ -1,6 +1,6 @@
// Basic component with props
-const Button = ({ color = "blue", size = "md" }) => {
+const Button = ({ color = "primary", size = "md" }) => {
return Click me;
};

// Component with multiple props and nested structure

State ID: fcbf740a Use this ID with appr