```ts

/** The KEY=VALUE pairs of a config file. */
export function parseConfig(text: string): Record<string, string> {
  const config: Record<string, string> = {};
  for (const line of text.split("\n")) {
    if (!line.trim()) continue;
    if (line.startsWith("#")) continue;

    const [key, value] = line.split("=", 2).map((part) => part.trim());
    if (!key || !value) throw new Error(`Line '${line}' has no key or value`);

    config[key] = value;
  }
  return config;
}
```