YAML Validator Skill

Validate and convert YAML.

Validate YAML

python3 -c "
import yaml, sys
try:
    data = yaml.safe_load(open('{filepath}'))
    print('Valid YAML')
    print(f'Top-level keys: {list(data.keys()) if isinstance(data, dict) else type(data).__name__}')
except yaml.YAMLError as e:
    print(f'Invalid YAML: {e}')
"

YAML to JSON

python3 -c "
import yaml, json
data = yaml.safe_load(open('{filepath}'))
print(json.dumps(data, indent=2))
"

JSON to YAML

python3 -c "
import yaml, json
data = json.load(open('{filepath}'))
print(yaml.dump(data, default_flow_style=False))
"

Common YAML Pitfalls

• Tabs are not allowed (use spaces)
• Unquoted strings starting with special chars
• Boolean gotchas: yes/no, on/off are booleans