feat: add 50mb limit for local files

Author: kehvinbehvin

src/strategies/LocalFileStrategy.ts

@@ -7,6 +7,7 @@ import { JsonIngestionResult } from '../types/JsonIngestion.js';
  * Strategy for ingesting JSON from local file system files
  */
 export class LocalFileStrategy extends JsonIngestionStrategy {
+ private readonly maxFileSize: number = 50 * 1024 * 1024; // 50MB limit
  canHandle(source: string): boolean {
  // Handle local file paths - not URLs
  // Covers: ./file.json, /abs/path/file.json, C:\Windows\file.json, file.json
@@ -18,6 +19,37 @@ export class LocalFileStrategy extends JsonIngestionStrategy {
  // Resolve and validate file path - keeping existing logic
  const resolvedPath = resolve(source);
 
+ // Check file size before reading
+ let fileStats;
+ try {
+ fileStats = await fs.stat(resolvedPath);
+ } catch (error) {
+ return {
+ success: false,
+ error: {
+ type: 'file_not_found',
+ message: `File not found: ${resolvedPath}`,
+ details: error
+ }
+ };
+ }
+
+ // Check if file size exceeds limit
+ if (fileStats.size > this.maxFileSize) {
+ return {
+ success: false,
+ error: {
+ type: 'content_too_large',
+ message: `File too large (${Math.round(fileStats.size / 1024 / 1024)}MB). This tool is optimized for JSON files under ${Math.round(this.maxFileSize / 1024 / 1024)}MB.`,
+ details: { 
+ fileSize: fileStats.size,
+ maxSize: this.maxFileSize,
+ filePath: resolvedPath
+ }
+ }
+ };
+ }
+ 
  // Read file content - keeping existing error handling
  let jsonContent: string;
  try {
@@ -27,7 +59,7 @@ export class LocalFileStrategy extends JsonIngestionStrategy {
  success: false,
  error: {
  type: 'file_not_found',
- message: `File not found: ${resolvedPath}`,
+ message: `Failed to read file: ${resolvedPath}`,
  details: error
  }
  };
@@ -51,8 +83,8 @@ export class LocalFileStrategy extends JsonIngestionStrategy {
  getMetadata() {
  return {
  name: 'LocalFileStrategy',
- description: 'Reads JSON data from local file system',
- supportedSources: ['Local file paths (relative and absolute)']
+ description: 'Reads JSON data from local file system with 50MB size limit',
+ supportedSources: ['Local file paths (relative and absolute)', 'JSON files under 50MB']
  };
  }
 }