kora-project-setup-java

Kora Project Setup — Java

Kora sub-skill — obey the kora-v1 meta rules on every task: R0 ensure .kora-agent/ docs+examples are cloned · R1 read this sub-skill before writing code · R2 Kora APIs only — no Spring/Micronaut/Quarkus, no invented annotations or config keys · R3 journal any incorrect Kora usage. Add comments/Javadoc only if asked.

Scaffold a minimal, compilable Kora service in Java. Kora is a compile-time framework: its annotation processor generates ApplicationGraph, controllers, JSON readers/writers and aspects during compileJava. If the processor is not wired into the Gradle build, nothing is generated and nothing works. This skill gets that wiring right the first time.

BOM version: ru.tinkoff.kora:kora-parent:1.2.19 (declared once; every ru.tinkoff.kora:* artifact inherits it — never version them individually). JDK: 17 minimum, 25 recommended. Gradle: 9+ (wrapper pins 9.5.1).

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Quick Start

Smallest build that compiles and runs an HTTP endpoint. Mirrors .kora-agent/kora-examples/guides/java/kora-java-guide-getting-started-app.

build.gradle:

import org.gradle.jvm.toolchain.JavaLanguageVersion
import org.gradle.jvm.toolchain.JvmVendorSpec

plugins {
    id "java"
    id "application"
}

java {
    toolchain {
        languageVersion = JavaLanguageVersion.of(25)
        vendor = JvmVendorSpec.ADOPTIUM
    }
}

repositories {
    mavenCentral()
}

configurations {
    koraBom
    annotationProcessor.extendsFrom(koraBom)
    compileOnly.extendsFrom(koraBom)
    implementation.extendsFrom(koraBom)
    testImplementation.extendsFrom(koraBom)
    testAnnotationProcessor.extendsFrom(koraBom)
}

dependencies {
    koraBom platform("ru.tinkoff.kora:kora-parent:1.2.19")

    // Mandatory: without this nothing is generated.
    annotationProcessor "ru.tinkoff.kora:annotation-processors"

    implementation "ru.tinkoff.kora:http-server-undertow"
    implementation "ru.tinkoff.kora:config-hocon"
    implementation "ru.tinkoff.kora:json-module"
    implementation "ru.tinkoff.kora:logging-logback"

    testAnnotationProcessor "ru.tinkoff.kora:annotation-processors"
    testImplementation "ru.tinkoff.kora:test-junit5"
}

application {
    mainClass = "com.example.Application"
}