### Refined General Structure

#### Hierarchical Approach

1. **Manufacturer Level**:
   - Contains general policies and information applicable to all devices from that manufacturer.
   - Includes a `whitelist-ips.json` and `security-contact.json` relevant to the entire range of products.

2. **Device-Specific Level**:
   - Provides detailed, device-specific instructions and information.
   - Contains its own `whitelist-ips.json`, `security-contact.json`, and `firewall-profile.json`.
   - Device-specific information overrides manufacturer-level information when present.

#### Example Structure

```plaintext
/.well-known/device-instructions
    /{manufacturer}
        /safelist-ips.json             # Manufacturer-level IP safelist
        /security-contact.json          # Manufacturer-level security contact
        /{device-model}
            /instructions.json          # Specific device instructions
            /firewall-profile.json      # Device-specific firewall profile
            /safelist-ips.json         # Device-specific IP safelist
            /security-contact.json      # Device-specific security contact
```

#### Precedence Rules

- **Device-Specific Over Manufacturer-Level**: Routers and other network management tools should prioritize device-specific instructions and settings. If a device-specific `whitelist-ips.json` or `security-contact.json` exists, it should override the manufacturer-level files.

#### Goals for Hierarchical Safelist and Contacts

- **Flexibility and Specificity**: Allow for both broad policies applicable across all devices and specific configurations tailored to individual models.
- **Clarity in Implementation**: Ensure that device-specific precedence over manufacturer-level information is clear and easy to implement in network management systems.
- **Enhanced Security and Compatibility**: Provide more precise security and operational guidelines, enhancing each device's security posture and operating compatibility.

#### Additional Considerations

- **Documentation and Communication**: Document the hierarchy and precedence rules, ensuring manufacturers and network administrators understand how to implement and interpret these files.
- **Update Mechanisms**: Establish efficient processes for updating manufacturer-level and device-specific files to keep them current and relevant.
- **Testing and Validation**: Rigorously test the hierarchical structure to ensure routers and network tools correctly apply the precedence rules in various scenarios.

With this refined structure, you can create a robust framework for disseminating device and manufacturer-specific firewall profiles, IP safelists, and security contacts, greatly enhancing networked devices' security and operational efficiency.