• feat!: add per-request custom headers support
  • DefaultHeaders support to ClientConfiguration for headers sent with every request
  • per-request headers support via Headers property on all client options classes
  • IRequestOptions interface and RequestOptions class for API-level header support
  • IClientRequestOptions interface and ClientRequestOptions class for client-level header support
  • add header validation to prevent overriding of reserved headers
• feat: add write conflict resolution options
  • ConflictOptions to control behavior for duplicate writes and missing deletes
  • OnDuplicateWrites option: Error (default) or Ignore for handling duplicate tuple writes
  • OnMissingDeletes option: Error (default) or Ignore for handling missing tuple deletes
  • Available in ClientWriteOptions.Conflict property
• feat: add Retry-After header support for rate limiting
  • Retry logic now respects Retry-After header from HTTP 429 responses
  • Falls back to exponential backoff when Retry-After header is missing or invalid

• OpenFgaApi methods: All API methods now accept an IRequestOptions? options parameter. If you are using the low-level OpenFgaApi directly, you may need to update your calls:

  Before:

  await api.Check(storeId, body, cancellationToken);

  After:

  var options = new RequestOptions {
      Headers = new Dictionary<string, string> { { "X-Custom-Header", "value" } }
  };
  await api.Check(storeId, body, options, cancellationToken);

• ClientRequestOptions renamed: The base client request options interface has been renamed from ClientRequestOptions to IClientRequestOptions to better follow .NET naming conventions. A concrete ClientRequestOptions class is now also available. If you were casting to or implementing this interface, update your code:

  Before:

  var options = obj as ClientRequestOptions;

  After:

  var options = obj as IClientRequestOptions;

Note: If you are using the high-level OpenFgaClient, no changes are required to your existing code. The new headers functionality is additive via the existing options parameters.