Function commaSeparatedList

commaSeparatedList(
options?: { lowercase?: boolean },
): ZodEffects<ZodString, string[], string>
Zod schema for comma-separated string list env vars.

Splits on ,, trims whitespace, removes empty segments. Optionally lowercases all values.

Use for required list fields that always produce a string[]. For optional fields that should return undefined when empty, use optionalCommaSeparatedList.
Parameters
- options: { lowercase?: boolean } = {}
  Configuration for list parsing
  - Optionallowercase?: boolean
    Lowercase all values (default: false)
Returns ZodEffects<ZodString, string[], string>
Zod schema that outputs string[]
Example
```
// In env schema:
OTEL_METRICS_EXPORTER: commaSeparatedList({ lowercase: true }).default('otlp,prometheus'),
```
- Defined in src/utils/zod-helpers.ts:69