Articles — Alex UsharovskiArticles by Alex Usharovski on Java, Spring, Hibernate, HTTP, parsing, guitar chord software and building apps with AI coding agents.https://usharik.dev/articles/2026-10-07T00:00:00ZAlex Usharovskihttps://usharik.dev/A one-person studio with an AI teamhttps://usharik.dev/articles/small-ai-team/2026-10-07T00:00:00Z2026-10-07T00:00:00ZHow I build and ship four Android apps and two web apps with AI coding agents: who does what, the rules file that grows from every mistake, checks that agents cannot talk their way around, reviews by a second model, and where people still have to look.How a computer finds guitar chord fingeringshttps://usharik.dev/articles/chord-fingerings-engine/2026-10-07T00:00:00Z2026-10-07T00:00:00ZWhat happens between typing "Am7" and seeing a ranked list of fingerings: parsing the chord name, generating the playable shapes on twelve frets, fitting a hand to each shape, ranking them the way chord books do, naming a chord from a shape, and posing a 3D hand on the neck.Liquibase in a Spring Boot 4 applicationhttps://usharik.dev/articles/liquibase-spring-boot/2026-10-07T00:00:00Z2026-10-07T00:00:00ZVersioning a database schema with Liquibase 5 in Spring Boot 4: changelogs in YAML, ddl-auto=validate, generating a changeset by diffing the database against JPA entities with liquibase-hibernate7, and rollback, including the changelog path trap that makes a rollback silently do nothing.Unidirectional and bidirectional relations in Hibernate 7https://usharik.dev/articles/hibernate-relations/2026-10-07T00:00:00Z2026-10-07T00:00:00ZWhy a @OneToMany suddenly creates a join table, why @ManyToMany on both sides gives two of them, what mappedBy really does, and why setting only the inverse side saves a null foreign key. Every DDL and SQL statement here was printed by Hibernate 7.4.Learning HTTP by writing a tiny web server in Javahttps://usharik.dev/articles/java-http-server/2026-10-07T00:00:00Z2026-10-07T00:00:00ZA web server on a bare socket in about a hundred lines of Java 21: the request line, headers, Content-Length, a request body, status codes and virtual threads, then the same with the JDK's built-in HttpServer. What my 2019 version got wrong.Recursive descent parsing, revisited in Java 21https://usharik.dev/articles/recursive-descent-parser/2026-10-07T00:00:00Z2026-10-07T00:00:00ZHow to parse arithmetic expressions by recursive descent: a grammar, operator precedence and associativity, unary minus, powers and functions, with a small Java 21 parser built on records and sealed interfaces.