import { Client } from '@modelcontextprotocol/sdk/client/index.js';
import { StdioClientTransport } from '@modelcontextprotocol/sdk/client/stdio.js';
import fs from 'fs';
import path from 'path';
function normalizeForDocker(p) {
return process.platform === 'win32' ? p.replace(/\\/g, '/') : p;
}
async function main() {
const projectRoot = process.cwd();
const logsDir = path.join(projectRoot, 'logs', 'diag-run');
fs.mkdirSync(logsDir, { recursive: true });
const volumeMount = `${normalizeForDocker(logsDir)}:/app/logs`;
const containerName = `mcp-stdio-diag-${Date.now()}`;
const transport = new StdioClientTransport({
command: 'docker',
args: [
'run', '--rm', '-i',
'--name', containerName,
'-v', volumeMount,
'-e', 'MCP_CONTAINER=true',
'mcp-debugger:local',
'stdio'
]
});
const client = new Client({
name: 'diag-stdio-client',
version: '0.0.1'
});
try {
console.log('[Diag] Connecting to containerized MCP server via stdio...');
await client.connect(transport);
console.log('[Diag] Connected.');
console.log('[Diag] Calling list_supported_languages...');
const langs = await client.callTool({
name: 'list_supported_languages',
arguments: {}
});
console.log('[Diag] list_supported_languages result:', JSON.stringify(langs, null, 2));
console.log('[Diag] Creating python debug session...');
const create = await client.callTool({
name: 'create_debug_session',
arguments: { language: 'python', name: 'Diag Session' }
});
console.log('[Diag] create_debug_session result:', JSON.stringify(create, null, 2));
// Try to parse sessionId if present
let sessionId;
try {
const contentArray = (create || {}).content;
if (Array.isArray(contentArray) && contentArray[0]?.type === 'text') {
const parsed = JSON.parse(contentArray[0].text);
sessionId = parsed.sessionId;
}
} catch (e) {
if (process.env.DEBUG_STDIO_DIAG) {
console.warn('[Diag] Ignoring parse error:', e?.message || e);
}
}
if (sessionId) {
console.log('[Diag] Closing session:', sessionId);
const close = await client.callTool({
name: 'close_debug_session',
arguments: { sessionId }
});
console.log('[Diag] close_debug_session result:', JSON.stringify(close, null, 2));
} else {
console.log('[Diag] No sessionId returned; skipping close.');
}
console.log('[Diag] Done.');
} catch (err) {
console.error('[Diag] Error:', err?.message || err);
process.exitCode = 1;
} finally {
try { await client.close(); } catch (e) {
if (process.env.DEBUG_STDIO_DIAG) {
console.warn('[Diag] Ignoring close error:', e?.message || e);
}
}
}
console.log('[Diag] Logs should be available under:', logsDir);
}
main();
