Projects — Laraue Boards, .NET Libraries and Telegram Bots

Laraue Boards is an open source task tracker with Telegram integration. The product site is boards.laraue.com; this page is about the project and how we build it.

Laraue.CmsBackend served Markdown files with frontmatter as a typed REST API in .NET. This blog ran on it for about a year. Now it has no new commits: what it did, how the code looked, and what we learned.

Laraue.Crawling is a C# web scraping library for .NET with typed schemas for static HTML, JavaScript-rendered pages and XML, plus a base class for scheduled crawler jobs. It crawled 100,000+ listings for us.

A deep dive into Laraue.EfCoreTriggers — how to define database triggers in C# using fluent syntax, how the library translates expression trees to SQL, and how to extend it for new database providers.

How Vocabulary Bot decides what to ask next: new, almost learned and fading words, the three-in-a-row rule, the word list and the source code.

A step-by-step walkthrough of building a query language interpreter in C# — lexer, parser, AST, and pipeline executor — using PdfQL as a real worked example. Open source.

The status of Laraue.Apps.RealEstate: an application that crawled two big listing sites and rated flats from their photos with a local vision model. 100,000+ listings, open source; the crawler is not launched now.

Telegram bot routing in C# without if-else chains. Laraue.Telegram.NET gives .NET 10 bots ASP.NET-style controllers, middleware, authentication, localization and tests. We run our own bots on it.