#!/usr/bin/env node
import { Server } from '@modelcontextprotocol/sdk/server/index.js';
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import {
CallToolRequestSchema,
ListToolsRequestSchema,
} from '@modelcontextprotocol/sdk/types.js';
import { readFileSync } from 'fs';
import { dirname, join } from 'path';
import { fileURLToPath } from 'url';
import { CRASH_TOOL } from './schema.js';
import { loadConfig } from './config.js';
import { CrashServer } from './server.js';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const pkg = JSON.parse(
readFileSync(join(__dirname, '..', 'package.json'), 'utf8'),
);
const { name, version } = pkg;
// Create MCP server instance with tools capability
const server = new Server(
{
name,
version,
},
{
capabilities: {
tools: {},
},
},
);
// Load configuration
const config = loadConfig();
// Show configuration on startup
console.error('🚀 CRASH MCP Server Starting...');
console.error(`📋 Configuration:`);
console.error(` - Strict Mode: ${config.validation.strictMode}`);
console.error(` - Revisions: ${config.features.enableRevisions ? 'Enabled' : 'Disabled'}`);
console.error(` - Branching: ${config.features.enableBranching ? 'Enabled' : 'Disabled'} (max depth: ${config.system.maxBranchDepth})`);
console.error(` - Sessions: ${config.features.enableSessions ? 'Enabled' : 'Disabled'} (timeout: ${config.system.sessionTimeout}min)`);
console.error(` - Output Format: ${config.display.outputFormat}`);
console.error(` - Max History: ${config.system.maxHistorySize} steps`);
const crashServer = new CrashServer(config);
// Expose tool
server.setRequestHandler(ListToolsRequestSchema, async () => ({
tools: [CRASH_TOOL],
}));
server.setRequestHandler(CallToolRequestSchema, async (request) => {
if (request.params.name === 'crash') {
return crashServer.processStep(request.params.arguments);
}
return {
content: [
{
type: 'text',
text: `Unknown tool: ${request.params.name}`,
},
],
isError: true,
};
});
async function runServer() {
const transport = new StdioServerTransport();
await server.connect(transport);
console.error('✅ CRASH MCP Server running on stdio');
console.error('🧠 CRASH - Cascaded Reasoning with Adaptive Step Handling');
console.error('📚 Use "crash" tool for structured reasoning');
if (config.validation.strictMode) {
console.error('⚠️ Running in STRICT MODE - validation rules enforced');
} else {
console.error('🎯 Running in FLEXIBLE MODE - natural language allowed');
}
}
runServer().catch((error) => {
console.error('Fatal error running server:', error);
process.exit(1);
});
