Limitations

• This package does not load .env files in the core package. Use your runtime, framework, or @nestjs/config for loading.
• The core does not read or mutate process.env; callers pass an input object.
• Unknown-key behavior is controlled by the Zod schema. A standard z.object strips unknown keys.
• ConfigReader deep-freezes the object it receives by default. This is useful for configuration, but callers should not pass objects they intend to mutate.
• The global bridge supports a single explicit config instance. It does not support named configs or a proxy API.
• The Nest adapter is single-config for now.