{"id":"lambda-env-var-key-must-start-with-letter","text":"Lambda environment variable keys must match the pattern `[a-zA-Z][a-zA-Z0-9_]+` — they must start with a letter followed by alphanumeric characters or underscores.","truth_value":"IN","source":"entries/2026/03/11/AWSCloudFormation-latest-UserGuide-aws-properties-lambda-function-environmenthtm.md","source_url":"","source_hash":"f194cc5cc025c1c2","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"lambda-env-var-key-must-start-with-letter","truth_value":"IN","reason":"premise"}]}}