diff --git a/CMakeLists.txt b/CMakeLists.txt
index 38f9da8b00..c025b419e1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2469,6 +2469,13 @@ set_tests_properties(test_demo_game_pk3 PROPERTIES
 	LABELS "scripts;validation;examples"
 	REQUIRED_FILES "${CMAKE_SOURCE_DIR}/tests/scripts/test_demo_game_pk3.sh")
 
+add_test(NAME test_native_module_regressions
+	COMMAND ${CMAKE_SOURCE_DIR}/tests/scripts/test_native_module_regressions.sh
+	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
+set_tests_properties(test_native_module_regressions PROPERTIES
+	LABELS "unit;scripts;validation"
+	REQUIRED_FILES "${CMAKE_SOURCE_DIR}/tests/scripts/test_native_module_regressions.sh")
+
 add_test(NAME test_compile_engine_lto
 	COMMAND ${CMAKE_SOURCE_DIR}/tests/scripts/test_compile_engine_lto.sh ${CMAKE_SOURCE_DIR}/scripts/compile_engine.sh
 	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
diff --git a/tests/README.md b/tests/README.md
index f155d19aa4..e5ddab8ed4 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -2,4 +2,4 @@
 
 - **Unit** (`BUILD_UNIT_TESTS=ON`): `unit_macros`, `unit_qmath`, `unit_surfaceflags`, `unit_qhelpers`, `unit_crc`, `unit_pathutil`, `unit_msg`, `unit_info`, `unit_cm_bounds`, `unit_parse`, `unit_endian` (CRC, COM path, `Info_*`, `COM_Parse*`, and endian tests use the same minimal `stub_qcommon_min.c` + `q_shared.c` + `q_math.c` link as `unit_qhelpers`; `unit_msg` links `msg.c` + `huffman_static.c` with `stub_qcommon_min.c`, `stub_msg_cvar.c`, and `-DDEDICATED`; `unit_cm_bounds` links `cm_bounds.c` + `q_math.c` only) — run `ctest -R unit_` or `./unit_*` from the build directory.
 - **Script regression tests**: `test_botlib_bounded_strings` (botlib string invariants). Run with `ctest -R test_botlib_bounded_strings` from the build directory.
-- **Validation**: `smoke_test`, `renderer_regression_check`, `check_artifacts`, `test_run_vulkan_script`, `test_compile_engine_lto`, `test_demo_game_pk3`, `test_vk_vegetation_dispatch_order`, `test_vulkan_mesh_shader_opt_in`, `test_vulkan_runtime_regressions`, `test_botlib_chat_message_bounds`, `test_vulkan_renderer_guards`, `test_vulkan_regression_source_guards`, `test_gltf_opengl_regressions`, `test_botlib_bounded_strings` — see `scripts/`, `tests/scripts/`, and `docs/RENDERER_CONFIDENCE.md`.
+- **Validation**: `smoke_test`, `renderer_regression_check`, `check_artifacts`, `test_run_vulkan_script`, `test_compile_engine_lto`, `test_demo_game_pk3`, `test_native_module_regressions`, `test_vk_vegetation_dispatch_order`, `test_vulkan_mesh_shader_opt_in`, `test_vulkan_runtime_regressions`, `test_botlib_chat_message_bounds`, `test_vulkan_renderer_guards`, `test_vulkan_regression_source_guards`, `test_gltf_opengl_regressions`, `test_botlib_bounded_strings` — see `scripts/`, `tests/scripts/`, and `docs/RENDERER_CONFIDENCE.md`.
diff --git a/tests/scripts/test_native_module_regressions.sh b/tests/scripts/test_native_module_regressions.sh
new file mode 100755
index 0000000000..f9b94b656d
--- /dev/null
+++ b/tests/scripts/test_native_module_regressions.sh
@@ -0,0 +1,188 @@
+#!/usr/bin/env bash
+# Regression checks for pk3-backed native module loading and script fallback paths.
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+
+fail() {
+	echo "FAIL: $*" >&2
+	exit 1
+}
+
+command -v python3 >/dev/null 2>&1 || fail "python3 not in PATH"
+
+python3 - "$PROJECT_ROOT" <<'PY'
+import re
+import sys
+from pathlib import Path
+
+root = Path(sys.argv[1])
+files_c = root / "src/qcommon/files.c"
+lua_debug_c = root / "src/qcommon/lua_debug.c"
+
+
+def fail(message: str) -> None:
+    print(f"FAIL: {message}", file=sys.stderr)
+    sys.exit(1)
+
+
+def strip_comments(text: str) -> str:
+    text = re.sub(r"/\*.*?\*/", "", text, flags=re.S)
+    return re.sub(r"//.*", "", text)
+
+
+def find_function_body(text: str, name: str) -> str:
+    text_no_comments = strip_comments(text)
+    match = re.search(r"(?m)^[A-Za-z_][A-Za-z0-9_\s\*]*\b" + re.escape(name) + r"\s*\([^;]*\)\s*\{", text_no_comments)
+    if not match:
+        fail(f"{name}: function definition not found")
+
+    start = text_no_comments.find("{", match.start())
+    if start < 0:
+        fail(f"{name}: opening brace not found")
+
+    depth = 0
+    i = start
+    state = "code"
+    while i < len(text_no_comments):
+        ch = text_no_comments[i]
+        if state == "code":
+            if ch == '"':
+                state = "string"
+            elif ch == "'":
+                state = "char"
+            elif ch == "{":
+                depth += 1
+            elif ch == "}":
+                depth -= 1
+                if depth == 0:
+                    return text_no_comments[start : i + 1]
+        elif state == "string":
+            if ch == "\\":
+                i += 2
+                continue
+            if ch == '"':
+                state = "code"
+        elif state == "char":
+            if ch == "\\":
+                i += 2
+                continue
+            if ch == "'":
+                state = "code"
+        i += 1
+
+    fail(f"{name}: closing brace not found")
+
+
+def assert_contains(haystack: str, needle: str, context: str) -> None:
+    if needle not in haystack:
+        fail(f"{context}: expected {needle!r}")
+
+
+def assert_regex(haystack: str, pattern: str, context: str) -> None:
+    if not re.search(pattern, haystack, flags=re.S):
+        fail(f"{context}: expected pattern {pattern!r}")
+
+
+def assert_order(haystack: str, first: str, second: str, context: str) -> None:
+    first_pos = haystack.find(first)
+    second_pos = haystack.find(second)
+    if first_pos < 0 or second_pos < 0 or first_pos >= second_pos:
+        fail(f"{context}: expected {first!r} before {second!r}")
+
+
+def assert_count(haystack: str, needle: str, expected: int, context: str) -> None:
+    actual = haystack.count(needle)
+    if actual != expected:
+        fail(f"{context}: expected {expected} occurrences of {needle!r}, found {actual}")
+
+
+for path in (files_c, lua_debug_c):
+    if not path.is_file():
+        fail(f"missing source file: {path}")
+
+files_text = files_c.read_text()
+files_uncommented = strip_comments(files_text)
+
+assert_contains(
+    files_uncommented,
+    '#define FS_NATIVE_LIB_CACHE_PREFIX "vm/native_cache/"',
+    "native cache prefix",
+)
+
+startup_body = find_function_body(files_text, "FS_Startup")
+assert_regex(
+    startup_body,
+    r'com_nativeLibraryExtractPk3\s*=\s*Cvar_Get\s*\(\s*"com_nativeLibraryExtractPk3"\s*,\s*"1"\s*,\s*CVAR_ARCHIVE\s*\)',
+    "com_nativeLibraryExtractPk3 default",
+)
+assert_contains(
+    startup_body,
+    "Cvar_SetDescription( com_nativeLibraryExtractPk3,",
+    "com_nativeLibraryExtractPk3 description",
+)
+assert_contains(
+    startup_body,
+    'Com_Printf( "com_nativeLibraryExtractPk3: extracting embedded native libs from pk3 is enabled.\\n" );',
+    "com_nativeLibraryExtractPk3 startup log",
+)
+
+pk3_body = find_function_body(files_text, "FS_TryLoadLibraryFromPk3Cache")
+assert_contains(
+    pk3_body,
+    "if ( !com_nativeLibraryExtractPk3 || !com_nativeLibraryExtractPk3->integer )",
+    "pk3 extraction cvar gate",
+)
+assert_contains(pk3_body, "if ( !name || !name[0] )", "pk3 extraction empty-name guard")
+assert_contains(pk3_body, "slash = strrchr( name, '/' );", "pk3 cache basename slash detection")
+assert_contains(pk3_body, "base = slash + 1;", "pk3 cache basename isolation")
+assert_contains(pk3_body, 'strstr( base, ".dll" )', "Windows native extension filter")
+assert_contains(pk3_body, 'Q_stricmp( base + strlen( base ) - 3, ".so" )', "POSIX native extension filter")
+assert_contains(
+    pk3_body,
+    'Com_sprintf( cacheQpath, sizeof( cacheQpath ), "%s%s", FS_NATIVE_LIB_CACHE_PREFIX, base );',
+    "basename-only native cache qpath",
+)
+assert_contains(pk3_body, "len = FS_ReadFile( name, &fileBuf );", "direct pk3 library read")
+assert_contains(pk3_body, "if ( slash )", "explicit path must not try implicit pk3 fallbacks")
+assert_contains(pk3_body, 'Com_sprintf( alt, sizeof( alt ), "vm/%s", name );', "vm/ pk3 fallback path")
+assert_contains(pk3_body, 'Com_sprintf( alt, sizeof( alt ), "modules/%s", name );', "modules/ pk3 fallback path")
+assert_order(pk3_body, "len = FS_ReadFile( name, &fileBuf );", 'Com_sprintf( alt, sizeof( alt ), "vm/%s", name );', "direct read before vm/ fallback")
+assert_order(pk3_body, 'Com_sprintf( alt, sizeof( alt ), "vm/%s", name );', 'Com_sprintf( alt, sizeof( alt ), "modules/%s", name );', "vm/ fallback before modules/ fallback")
+assert_count(pk3_body, "FS_ReadFile(", 3, "pk3 read attempts")
+
+assert_contains(pk3_body, "crcPak = crc32_buffer( (const byte *)fileBuf, (unsigned int)len );", "pk3 CRC calculation")
+assert_contains(
+    pk3_body,
+    "Q_strncpyz( osCachePath, FS_BuildOSPath( fs_homepath->string, fs_gamedir, cacheQpath ), sizeof( osCachePath ) );",
+    "native cache writes under fs_homepath/fs_gamedir",
+)
+assert_contains(pk3_body, 'fp = Sys_FOpen( osCachePath, "rb" );', "native cache reuse open")
+assert_contains(pk3_body, "readLen > 0 && readLen == len", "native cache length gate")
+assert_contains(pk3_body, "crcDisk = crc32_buffer( (const byte *)diskBuf, (unsigned int)readLen );", "native cache CRC calculation")
+assert_contains(pk3_body, "if ( crcDisk == crcPak )", "native cache CRC reuse gate")
+assert_order(pk3_body, "if ( crcDisk == crcPak )", "h = FS_TryLoadLibraryPath( osCachePath );", "dlopen only after cache CRC validation")
+assert_contains(pk3_body, "FS_CreatePath( osCachePath )", "native cache create path")
+assert_contains(pk3_body, 'FILE *out = Sys_FOpen( osCachePath, "wb" );', "direct native cache write open")
+assert_contains(pk3_body, "fwrite( fileBuf, 1, (size_t)len, out )", "direct native cache write")
+assert_contains(pk3_body, "FS_LoadLibrary: using pk3 native cache", "cache reuse diagnostic")
+assert_contains(pk3_body, "FS_LoadLibrary: failed to write pk3 native cache", "cache write failure diagnostic")
+assert_contains(pk3_body, "FS_LoadLibrary: extracted pk3 native lib to", "cache extraction diagnostic")
+
+load_body = find_function_body(files_text, "FS_LoadLibrary")
+assert_contains(load_body, "libHandle = FS_TryLoadLibraryFromPk3Cache( name );", "FS_LoadLibrary pk3 cache probe")
+assert_order(load_body, "libHandle = FS_TryLoadLibraryFromPk3Cache( name );", "while ( !libHandle && sp )", "pk3 cache before loose filesystem search")
+
+lua_text = lua_debug_c.read_text()
+lua_body = find_function_body(lua_text, "LuaDebug_LoadScript")
+assert_contains(lua_body, "if ( luaL_loadfile( s_luaState, scriptPath ) != LUA_OK )", "Lua file load primary path")
+assert_contains(lua_body, "lua_pop( s_luaState, 1 );", "Lua clears failed loadfile error before pk3 fallback")
+assert_contains(lua_body, "blen = FS_ReadFile( scriptPath, &buf );", "Lua pk3 script read fallback")
+assert_contains(lua_body, "if ( luaL_loadbuffer( s_luaState, (const char *)buf, (size_t)blen, scriptPath ) != LUA_OK )", "Lua pk3 script loadbuffer fallback")
+assert_contains(lua_body, "FS_FreeFile( buf );", "Lua frees pk3 fallback buffer")
+assert_order(lua_body, "luaL_loadfile", "FS_ReadFile", "Lua loadfile failure before filesystem fallback")
+assert_order(lua_body, "FS_ReadFile", "luaL_loadbuffer", "Lua filesystem fallback before loadbuffer")
+
+print("PASS: test_native_module_regressions")
+PY