Pascal Welsch passsy

MCP app rating lifecycle reproduction

A small stdio MCP server with one embedded card, two rating buttons and a JSON state file. No npm packages, credentials, network access or another MCP server are needed. Requires Node.js 22+; the automated verification also requires the Codex CLI. Tested with Node.js 26.12.1 and codex-cli 0.165.0.

What is included

server.mjs: the MCP server and its inline MCP Apps HTML resource.

How to use xrechnung-visualization

1. Install Ant

Install brew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

Then install ant using brew

Interactive CLI in Dart

Example how to build a interactive CLI application in Dart

	import 'package:flutter_test/flutter_test.dart';

	void main() {
	test('1 should round 0.145 to 0.15', () {
	const value = 0.145;
	final rounded = value.toStringAsFixed(2);
	expect(rounded, '0.15'); // actual 0.14
	});

	test('2 should round 0.145 to 0.15', () {

	import 'dart:async';

	import 'package:flutter/material.dart';
	import 'package:flutter/rendering.dart';

	/// Written by PHNTM GmbH
	void main() {
	runApp(const AdvancedOverlaySample());
	}

	import 'dart:math';

	import 'package:flutter/material.dart';

	void main() {
	runApp(Kata());
	}

	class Kata extends StatelessWidget {
	@override

	import 'dart:async';

	void main() async {
	// start future
	final future = doHardWork();
	// continously post progress
	final sub = showProgress().listen((_) {});
	// wait for completion
	await future;
	// stop progress

	// @dart=2.12

	/// A const implementation of Uri which crashes at first access in case the uri is invalid
	class ConstUri implements Uri {
	/// Caches the static parsed uri
	///
	/// The parsed uri can't be a mutable member field because that's not allowed for const classes
	static final _cache = <String, Uri>{};

	const ConstUri(String uri) : _uri = uri;

	import 'package:flutter/material.dart';

	Future<void> main() async {
	runApp(Builder(
	builder: (context) => const MyApp(),
	));
	}

	class MyApp extends StatelessWidget {
	const MyApp({

	void main() {
	final Object something = TypeA();

	something.matchTypes({
	TypeA : () => print("found A"),
	TypeB : () => print("found B"),
	});

	}