Quarkus Skill

Usage

Add the extension to use application.yaml (or application.yml) instead of or alongside application.properties. Place the file in src/main/resources/.

quarkus:
  http:
    port: 8080
  datasource:
    db-kind: postgresql
    username: admin
    password: secret
    jdbc:
      url: jdbc:postgresql://localhost:5432/mydb

greeting:
  message: Hello
  name: World

Profile-Specific Configuration

Use %profile prefix:

"%dev":
  quarkus:
    datasource:
      jdbc:
        url: jdbc:h2:mem:devdb

"%test":
  quarkus:
    datasource:
      jdbc:
        url: jdbc:h2:mem:testdb

Note the quotes around %dev — YAML requires them because % is a special character.

Both Formats Coexist

application.properties and application.yaml can exist simultaneously. Properties from both are merged, with application.yaml taking precedence for duplicate keys.

Common Pitfalls

• Profile prefix needs quotes: %dev must be "%dev" in YAML — without quotes, YAML parsers may reject the file.
• Precedence: application.yaml overrides application.properties for the same key. System properties and environment variables override both.
• Nested keys: The YAML structure must mirror the dot-separated property path. quarkus.http.port becomes quarkus: http: port:.
• Lists: Use YAML array syntax for list properties: quarkus.http.cors.origins becomes a YAML list under origins:.
• No special features: This extension only adds YAML parsing support. All config semantics (profiles, expressions, defaults) work identically to properties files.