Function deletePermissionRule

src/utils/permissions/permissions.ts:1329–1370

({
  rule,
  initialContext,
  setToolPermissionContext,
}: EditPermissionRuleArgs & { rule: PermissionRule })

 * Delete a permission rule from the appropriate destination
 */
export async function deletePermissionRule({
  rule,
  initialContext,
  setToolPermissionContext,
}: EditPermissionRuleArgs & { rule: PermissionRule }): Promise<void> {
  if (
    rule.source === 'policySettings' ||
    rule.source === 'flagSettings' ||
    rule.source === 'command'
  ) {
    throw new Error('Cannot delete permission rules from read-only settings')
  }

  const updatedContext = applyPermissionUpdate(initialContext, {
    type: 'removeRules',
    rules: [rule.ruleValue],
    behavior: rule.ruleBehavior,
    destination: rule.source as PermissionUpdateDestination,
  })

  // Per-destination logic to delete the rule from settings
  const destination = rule.source
  switch (destination) {
    case 'localSettings':
    case 'userSettings':
    case 'projectSettings': {
      // Note: Typescript doesn't know that rule conforms to `PermissionRuleFromEditableSettings` even when we switch on `rule.source`
      deletePermissionRuleFromSettings(
        rule as PermissionRuleFromEditableSettings,
      )
      break
    }
    case 'cliArg':
    case 'session': {
      // No action needed for in-memory sources - not persisted to disk
      break
    }
  }

  // Update React state with updated context
  setToolPermissionContext(updatedContext)
}

/**
 * Helper to convert PermissionRule array to PermissionUpdate array