Initial agent-news: Dart Telegram bot + Claude Code runner + MCP bridge
/news spawns claude-code as a local subprocess (single pod, no cross-container exec on K3s); Claude delivers the digest itself via the send_to_telegram MCP tool. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
82
mcp_server/bin/agent_news_mcp.dart
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82
mcp_server/bin/agent_news_mcp.dart
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import 'dart:convert';
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import 'dart:io';
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import 'package:mcp_dart/mcp_dart.dart';
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final _token = Platform.environment['TELEGRAM_BOT_TOKEN'] ?? '';
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final _http = HttpClient();
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CallToolResult _ok(String text) => CallToolResult(content: [TextContent(text: text)]);
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CallToolResult _err(String text) =>
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CallToolResult(content: [TextContent(text: 'Ошибка: $text')], isError: true);
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List<String> _splitMessage(String text) {
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const maxLen = 4000;
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if (text.length <= maxLen) return [text];
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final chunks = <String>[];
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var start = 0;
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while (start < text.length) {
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final end = (start + maxLen).clamp(0, text.length);
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chunks.add(text.substring(start, end));
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start = end;
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}
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return chunks;
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}
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Future<void> _sendMessage(int chatId, String text) async {
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for (final chunk in _splitMessage(text)) {
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final req = await _http.postUrl(
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Uri.parse('https://api.telegram.org/bot$_token/sendMessage'),
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);
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req.headers.contentType = ContentType.json;
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req.write(jsonEncode({
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'chat_id': chatId,
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'text': chunk,
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'parse_mode': 'Markdown',
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}));
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final res = await req.close();
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final body = await res.transform(utf8.decoder).join();
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if (res.statusCode >= 400) {
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throw Exception('Telegram sendMessage → ${res.statusCode}: $body');
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}
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}
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}
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void main() {
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final server = McpServer(
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const Implementation(name: 'agent-news', version: '0.1.0'),
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options: const McpServerOptions(
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capabilities: ServerCapabilities(tools: ServerCapabilitiesTools()),
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),
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);
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server.registerTool(
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'send_to_telegram',
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description:
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'Отправляет готовый текст (Markdown) в указанный Telegram-чат. '
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'Единственный способ доставить результат ресёрча пользователю — '
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'вызывай этот тул с финальным оформленным текстом.',
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inputSchema: JsonSchema.object(
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properties: {
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'chat_id': JsonSchema.integer(description: 'ID чата Telegram, куда отправить сообщение'),
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'text': JsonSchema.string(description: 'Готовый текст в Markdown-разметке Telegram'),
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},
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required: ['chat_id', 'text'],
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),
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callback: (args, _) async {
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if (_token.isEmpty) {
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return _err('TELEGRAM_BOT_TOKEN не задан в окружении MCP-сервера');
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}
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try {
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final chatId = args['chat_id'] as int;
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final text = args['text'].toString();
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await _sendMessage(chatId, text);
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return _ok('Отправлено в чат $chatId (${text.length} символов).');
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} catch (e) {
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return _err('$e');
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}
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},
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);
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server.connect(StdioServerTransport());
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}
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101
mcp_server/pubspec.lock
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101
mcp_server/pubspec.lock
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# Generated by pub
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# See https://dart.dev/tools/pub/glossary#lockfile
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packages:
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async:
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dependency: transitive
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description:
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name: async
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sha256: e2eb0491ba5ddb6177742d2da23904574082139b07c1e33b8503b9f46f3e1a37
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url: "https://pub.dev"
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source: hosted
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version: "2.13.1"
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collection:
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dependency: transitive
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description:
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name: collection
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sha256: "2f5709ae4d3d59dd8f7cd309b4e023046b57d8a6c82130785d2b0e5868084e76"
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url: "https://pub.dev"
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source: hosted
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version: "1.19.1"
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http:
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dependency: transitive
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description:
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name: http
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sha256: "87721a4a50b19c7f1d49001e51409bddc46303966ce89a65af4f4e6004896412"
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url: "https://pub.dev"
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source: hosted
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version: "1.6.0"
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http_parser:
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dependency: transitive
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description:
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name: http_parser
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sha256: "178d74305e7866013777bab2c3d8726205dc5a4dd935297175b19a23a2e66571"
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url: "https://pub.dev"
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source: hosted
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version: "4.1.2"
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mcp_dart:
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dependency: "direct main"
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description:
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name: mcp_dart
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sha256: "106118d1e7628becc72c8485dc1a3e2c8ed62a48527efc6d70b8576d3b18083f"
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url: "https://pub.dev"
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source: hosted
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version: "1.3.0"
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meta:
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dependency: transitive
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description:
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name: meta
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sha256: "307249ce4ff29d58a18e97f6345f539382eb9c9c29ecda628900f31de0443dd9"
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url: "https://pub.dev"
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source: hosted
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version: "1.19.0"
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path:
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dependency: transitive
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description:
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name: path
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sha256: "75cca69d1490965be98c73ceaea117e8a04dd21217b37b292c9ddbec0d955bc5"
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url: "https://pub.dev"
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source: hosted
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version: "1.9.1"
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source_span:
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dependency: transitive
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description:
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name: source_span
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sha256: "56a02f1f4cd1a2d96303c0144c93bd6d909eea6bee6bf5a0e0b685edbd4c47ab"
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url: "https://pub.dev"
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source: hosted
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version: "1.10.2"
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string_scanner:
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dependency: transitive
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description:
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name: string_scanner
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sha256: "921cd31725b72fe181906c6a94d987c78e3b98c2e205b397ea399d4054872b43"
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url: "https://pub.dev"
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source: hosted
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version: "1.4.1"
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term_glyph:
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dependency: transitive
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description:
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name: term_glyph
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sha256: "7f554798625ea768a7518313e58f83891c7f5024f88e46e7182a4558850a4b8e"
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url: "https://pub.dev"
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source: hosted
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version: "1.2.2"
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typed_data:
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dependency: transitive
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description:
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name: typed_data
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sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
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url: "https://pub.dev"
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source: hosted
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version: "1.4.0"
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web:
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dependency: transitive
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description:
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name: web
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sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
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url: "https://pub.dev"
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source: hosted
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version: "1.1.1"
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sdks:
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dart: ">=3.11.0 <4.0.0"
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10
mcp_server/pubspec.yaml
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10
mcp_server/pubspec.yaml
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name: agent_news_mcp
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description: agent-news — MCP server exposing send_to_telegram for Claude Code
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version: 0.1.0
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publish_to: none
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environment:
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sdk: ^3.11.0
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dependencies:
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mcp_dart: ^1.2.0
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