From 09f7b23aed12a84b2c0a88bb1085b0a024e47594 Mon Sep 17 00:00:00 2001
From: FHIR Team <no-reply@google.com>
Date: Mon, 1 Jun 2026 02:29:59 -0700
Subject: [PATCH] None

PiperOrigin-RevId: 924576836
---
 cc/google/fhir/BUILD                          |  3 +++
 .../fhir/allow_unsandboxed_fhir_package.cc    | 23 +++++++++++++++++++
 cc/google/fhir/fhir_package.cc                |  4 +---
 3 files changed, 27 insertions(+), 3 deletions(-)
 create mode 100644 cc/google/fhir/allow_unsandboxed_fhir_package.cc

diff --git a/cc/google/fhir/BUILD b/cc/google/fhir/BUILD
index 99fffe63f03..aa1bbb7cb2c 100644
--- a/cc/google/fhir/BUILD
+++ b/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",
diff --git a/cc/google/fhir/allow_unsandboxed_fhir_package.cc b/cc/google/fhir/allow_unsandboxed_fhir_package.cc
new file mode 100644
index 00000000000..1caf866649e
--- /dev/null
+++ b/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)
diff --git a/cc/google/fhir/fhir_package.cc b/cc/google/fhir/fhir_package.cc
index 49fef53839b..b230810cd47 100644
--- a/cc/google/fhir/fhir_package.cc
+++ b/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