Entertainment on Lazurkin

JsonApi4j

Tue, 28 Apr 2026 00:00:00 +0000

JsonApi4j is a Java framework that takes the toil out of building REST APIs by automatically generating fully spec-compliant JSON:API endpoints — including pagination links, error responses, and OpenAPI documentation.

It works across Spring Boot, Quarkus, and the Jakarta Servlet API, and is data-source agnostic: SQL, NoSQL, REST clients, or in-memory stores all plug in equally. A declarative, annotation-driven model handles access control, sparse fieldsets, and compound documents without requiring custom logic.

Key features:

Auto-generated JSON:API endpoints — pagination, filtering, sorting, and error handling out of the box
Multi-framework support — Spring Boot, Quarkus, Jakarta Servlet API
OpenAPI docs — always in sync, generated automatically
Pluggable architecture — access control, sparse fieldsets, and compound document plugins
Any data source — SQL, NoSQL, REST clients, or in-memory stores
Fine-grained authorization — annotation-driven, per-resource and per-operation

I contributed to the project as an open-source collaborator.

TV Radar

Tue, 28 Apr 2026 00:00:00 +0000

TV Radar is a lightweight notification service for TV series fans. Subscribe to your favourite shows, and TV Radar will alert you as soon as a new episode is available — no more manually checking release schedules.

Key features:

Series subscriptions — follow any number of shows from a single dashboard
New episode notifications — get alerted the moment a new episode drops
Clean, distraction-free interface — focused on what matters: your watchlist

The backend is built with JsonApi4j — a Java framework that auto-generates JSON:API-compliant REST endpoints.

GrammarMama

Sat, 04 Apr 2026 00:00:00 +0000

GrammarMama is an AI-powered adaptive language tutor that meets you where you are and grows with you. It assesses your current proficiency from A0 to C2, learns from your mistakes and vocabulary gaps, and generates personalized daily exercises tailored to your own goals — written in your own words.

Tell GrammarMama what you want to achieve (“I want to hold business conversations in German” or “I’m preparing for IELTS”), and it builds a learning path around that goal. Each session adapts to your progress: exercises increase in complexity as your skills improve, and recurring weak spots get extra attention until they stick.

Key features:

Level assessment — evaluated against the A0–C2 CEFR scale from your very first interaction
Goal-driven learning — describe your goal in free text; the tutor shapes exercises around it
Daily exercises — fresh practice generated each day with gradually increasing complexity
Mistake tracking — errors are remembered across sessions so weak areas get targeted reinforcement
Vocabulary tracking — new and difficult words are logged and recycled into future exercises
Multilingual — supports English, German, Spanish, French, Italian, Russian, and more

The tool uses Claude API to power assessment, exercise generation, and adaptive feedback.

SkyBridge

Wed, 25 Mar 2026 00:00:00 +0000

SkyBridge is my rock band revived in early 2025.

Style is an alternative rock. There I play guitar, piano, accordion and sign.

We have recordings from 2010 and several new songs. You can find them on Spotify, YouTube Music, Soundcloud or directly on the web-site.

Text2Event

Wed, 25 Mar 2026 00:00:00 +0000

Text2Event is a tiny productivity tool to create calendar events from text description.

It does not require any sign up and produces ICS files as well as deep links for Google Calendar, Outlook Live and Microsoft 365.

There are several quick access options like

Text2Event Chrome extension
Progressive Web Application (PWA) which in combination with Google Chrome on Android gives a native-like experience. I like share text with Text2Event PWA which automatically generates ICS file that is smoothlessly opened by Google Calendar.
and iOS Shortcut

The tool uses Claude API to parse text input.