What problem does it solve? Managing credentials and connection configurations for external services in Windmill requires correctly structured resource files, and this Skill provides the exact file formats, schemas, and reference syntax needed to define them without guesswork. ## Core Features & Use Cases - Resource File Creation: Defines {path}.resource.json files with the required value and resource_type fields for services like PostgreSQL, MySQL, Slack, S3, Kafka, NATS, and MQTT. - Variable and Resource References: Supports $var: syntax for referencing global, user, and folder variables, and $res: syntax for referencing other resources, keeping secrets out of plain text. - Custom Resource Types: Creates custom resource type definitions with JSON Schema validation saved as .resource-type.json files. - Use Case: When setting up a new PostgreSQL connection for a Windmill workspace, generate a properly structured f/databases/postgres_prod.resource.json file that references the password via $var:g/all/db_password instead of hardcoding it. ## Quick Start Create a Windmill resource file for a PostgreSQL database that references its password from a global variable.