None

cc/google/fhir/BUILD

@@ -597,6 +597,9 @@ cc_library(
     name = "fhir_package",
     srcs = ["fhir_package.cc"],
     hdrs = ["fhir_package.h"],
+    local_defines = select({
+        "//conditions:default": [],
+    }),
     strip_include_prefix = "//cc/",
     deps = [
         ":error_reporter",

cc/google/fhir/allow_unsandboxed_fhir_package.cc

@@ -0,0 +1,23 @@
+// Copyright 2026 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// NOLINTBEGIN(whitespace/line_length)
+// Definition of the poison symbol required to link fhir_package in unsandboxed
+// mode. This is restricted to allowed unsandboxed users to prevent accidental
+// backsliding.
+
+extern "C" int
+    DO_NOT_OVERWRITE____FHIR_PACKAGE_UNSANDBOXED_USE_REQUIRES_APPROVAL____SEE_cl_924576836 =
+        1;
+// NOLINTEND(whitespace/line_length)

cc/google/fhir/fhir_package.cc

@@ -130,9 +130,7 @@ absl::Status MaybeAddEntryToFhirPackage(absl::string_view entry_name,
                                        fhir_package);
 }
 
-// Opens the archive for reading at `archive_file_path` and returns a unique
-// pointer to the archive. The unique pointer will close and free the archive
-// when it is destructed.
+// Unsandboxed Implementation
 absl::StatusOr<std::unique_ptr<archive, decltype(&archive_read_free)>>
 OpenArchive(absl::string_view archive_file_path) {
   // archive_read_free itself calls archive_read_close, so no further cleanup is