Docker Compose YAML Validator

Catch compose file mistakes before docker-compose up

Implements a minimal indentation-based YAML-subset parser built specifically for typical docker-compose structure — services, image, build, ports, volumes, environment, depends_on, and networks. Validates structural correctness and flags specific line-level issues, with an explicit note that it is a scoped validator, not a full YAML spec parser.

• →Checks for a top-level services: key, and that every service has an image or build key
• →Validates port mappings match HOST:CONTAINER format and volume mappings are well-formed
• →Flags duplicate service names and mismatched or tab-based indentation
• →Clearly scoped as a common-structure validator, not a full YAML spec parser — pair with docker compose config for guaranteed correctness
• →Watermarked by Cikal Studio Labs · Works on any device, no install required