Initial project setup

.gitattributes

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+gradlew        text eol=lf
+gradlew.bat    text eol=crlf

.github/workflows/build.yml

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+name: Build
+
+on:
+  pull_request:
+  push:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ '17', '21', '25' ]
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: ${{ matrix.java }}
+      - uses: gradle/actions/setup-gradle@v6
+      - run: ./gradlew test
+
+  build:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: '17'
+      - uses: gradle/actions/setup-gradle@v6
+      - run: ./gradlew build -x test
+      - uses: actions/upload-artifact@v7
+        with:
+          name: montonio-sdk
+          path: build/libs/*.jar

.gitignore

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+/.idea
+/initial-docs
+/build
+/.gradle
+.DS_Store

.sdkmanrc

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+java=17.0.14-tem

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Montonio Java SDK — a type-safe Java client for the Montonio payment gateway REST API (V2 + Stargate). Covers payment order lifecycle, payment method discovery, and JWT webhook/return validation. MIT licensed, owned by Bitweb.
+
+## Build & Test Commands
+
+Requires Java 17 (managed via `.sdkmanrc`). Uses Gradle 9.4.1 with Groovy DSL.
+
+```bash
+./gradlew build                # full build
+./gradlew test                 # all tests
+./gradlew unitTest             # unit tests only (excludes @Tag("integration"))
+./gradlew integrationTest      # integration tests only (@Tag("integration"))
+./gradlew testAndReport        # all tests + jacoco reports
+./gradlew test --tests 'com.example.MyTest.myMethod'  # single test
+```
+
+## Gradle Structure
+
+Build is split across files following BitWeb conventions:
+- `build.gradle` — plugins, dependencies, Java config
+- `test.gradle` — JUnit Platform, jacoco, unit/integration test tasks
+- `library.gradle` — java-library, maven-publish, signing, nexus publishing

build.gradle

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+buildscript {
+    dependencies {
+        classpath 'org.owasp:dependency-check-gradle'
+    }
+}
+
+plugins {
+    id 'java'
+    id "org.owasp.dependencycheck" version "12.2.0"
+    id "io.freefair.lombok" version "9.2.0"
+    id "io.github.gradle-nexus.publish-plugin" version "2.0.0"
+}
+
+group 'ee.bitweb'
+version '0.1.0'
+java {
+    sourceCompatibility = '17'
+}
+
+tasks.withType(JavaCompile).configureEach {
+    options.compilerArgs.add("-parameters")
+}
+
+apply from: "test.gradle"
+apply from: "library.gradle"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation platform('org.junit:junit-bom:5.14.3')
+    testImplementation 'org.junit.jupiter:junit-jupiter'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}

gradle.properties

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+org.gradle.welcome=never

gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists