## Graph Pruning Lint Rules Overview

### Rules

1. UNUSED_FIELDS  
   - Identifies and lists all fields that are not being used in the schema.  
2. DEPRECATED_FIELDS  
   - Detects fields that have been deprecated but have not yet been removed from the schema.  
3. REQUIRE_DEPRECATION_BEFORE_DELETION  
   - Identifies fields that were deleted without being marked as deprecated beforehand.

### Rule Configurations

#### Severity Level

- Error: If any configured rules are violated, it causes the check operation to fail.  
- Warning: If any configured rules are violated, they are flagged as warnings, but they don’t cause the check operation to fail.

#### Grace Period
This is the time period provided to the fields modified on schema publications, allowing time before enforcing these rules during checks.

#### Schema Usage Check Period (Enterprise only)
- This is the time period used to check the usage of the field.  
- For non-enterprise customers, the value is determined by the limits imposed on the organization according to its current billing plan.

### How to configure graph pruning linter

1. Navigate to the Lint Policy page on Cosmo.
2. Select the namespace.
3. Enable the graph pruning linter.
4. Configure the linter rules:
   - Check the checkbox to enable each rule.  
   - Select the **severity level** (Warning or Error) for each rule.  
   - Set the **grace period** for fields that are modified upon schema publication, allowing time before enforcing these rules during checks.  
   - Configure the **schema usage check period** (available only for enterprise customers).