KnowledgeGraph MCP Server

import { homedir } from 'os'; import { join } from 'path'; import { mkdirSync, existsSync } from 'fs'; // Project utility functions export function resolveProject(toolProject?: string): string { return toolProject || process.env.KNOWLEDGEGRAPH_PROJECT || 'knowledgegraph_default_project'; } export function validateProjectName(project: string): boolean { // Validate project name for file system safety return /^[a-zA-Z0-9_-]+$/.test(project) && project.length > 0 && project.length <= 100; } export function sanitizeProjectName(project: string): string { // Remove any characters that aren't alphanumeric, underscore, or hyphen return project.replace(/[^a-zA-Z0-9_-]/g, '_'); } // SQLite path utility functions export function getDefaultSQLitePath(): string { // Check if custom path is provided via environment variable const customPath = process.env.KNOWLEDGEGRAPH_SQLITE_PATH; if (customPath) { return customPath; } // Default to {home directory}/.knowledge-graph/knowledgegraph.db const homeDir = homedir(); const knowledgeGraphDir = join(homeDir, '.knowledge-graph'); // Ensure the directory exists if (!existsSync(knowledgeGraphDir)) { try { mkdirSync(knowledgeGraphDir, { recursive: true }); console.log(`Created knowledge graph directory: ${knowledgeGraphDir}`); } catch (error) { console.warn(`Failed to create knowledge graph directory: ${error}`); // Fall back to current directory if home directory creation fails return './knowledgegraph.db'; } } return join(knowledgeGraphDir, 'knowledgegraph.db'); } export function resolveSQLiteConnectionString(): string { const dbPath = getDefaultSQLitePath(); return `sqlite://${dbPath}`; }