MCP SmallEdit

Instructions

Implementation Reference

• src/index.ts:608-644 (handler)

  Handler implementation for sed_multifile tool. Locates files using 'find' with the given glob pattern, applies the sed pattern via 'perl -i -pe' to each matching file (with optional .bak backups), collects results, and returns a processing summary.

  case 'sed_multifile': {
    const { pattern, filePattern, directory = '.', backup = true } = args;
    
    // Use find to get files matching pattern
    const findCmd = `find ${directory} -name "${filePattern}" -type f`;
    const { stdout: files } = await execAsync(findCmd);
    
    if (!files.trim()) {
      return {
        content: [{
          type: 'text',
          text: `No files found matching pattern: ${filePattern}`
        }]
      };
    }
    
    const fileList = files.trim().split('\n');
    const results = [];
    
    for (const file of fileList) {
      try {
        const backupExt = backup ? '.bak' : '';
        const sedCmd = `perl -i${backupExt} -pe '${pattern}' '${file}'`;
        await execAsync(sedCmd);
        results.push(`✓ ${file}`);
      } catch (error) {
        results.push(`✗ ${file}: ${error.message}`);
      }
    }
    
    return {
      content: [{
        type: 'text',
        text: `Processed ${fileList.length} files:\n${results.join('\n')}`
      }]
    };
  }

• src/index.ts:67-94 (registration)

  Registration of the sed_multifile tool in the ListTools response, including name, description, and input schema definition.

  {
    name: 'sed_multifile',
    description: 'Apply sed pattern to multiple files matching a glob pattern',
    inputSchema: {
      type: 'object',
      properties: {
        pattern: {
          type: 'string',
          description: 'Sed pattern to apply'
        },
        filePattern: {
          type: 'string',
          description: 'File glob pattern (e.g., "*.ts", "src/**/*.js")'
        },
        directory: {
          type: 'string',
          default: '.',
          description: 'Starting directory for search'
        },
        backup: {
          type: 'boolean',
          default: true,
          description: 'Create backup files'
        }
      },
      required: ['pattern', 'filePattern']
    }
  },

• src/index.ts:70-92 (schema)

  Input schema definition for sed_multifile tool, specifying parameters like pattern, filePattern, directory, and backup options.

  inputSchema: {
    type: 'object',
    properties: {
      pattern: {
        type: 'string',
        description: 'Sed pattern to apply'
      },
      filePattern: {
        type: 'string',
        description: 'File glob pattern (e.g., "*.ts", "src/**/*.js")'
      },
      directory: {
        type: 'string',
        default: '.',
        description: 'Starting directory for search'
      },
      backup: {
        type: 'boolean',
        default: true,
        description: 'Create backup files'
      }
    },
    required: ['pattern', 'filePattern']