diff --git a/tarantool-protobuf-scm-1.rockspec b/tarantool-protobuf-scm-1.rockspec
new file mode 100644
index 0000000000000000000000000000000000000000..45e9c087b7df9182cf7e6b08521adc02d296d4aa
--- /dev/null
+++ b/tarantool-protobuf-scm-1.rockspec
@@ -0,0 +1,45 @@
+package = "tarantool-protobuf"
+version = "scm-1"
+
+source = {
+    url = "git+https://sourcecraft.dev/bigbes/tarantool-protobuf.git",
+    branch = "master",
+}
+
+description = {
+    summary = "Protocol Buffers (proto3) + gRPC runtime for Tarantool",
+    detailed = [[
+A protoc plugin (Go) and pure-Lua runtime that give Tarantool a complete
+proto3 + gRPC stack — decode, map, oneof, services, well-known types, JSON
+and text-format codecs, and zero-copy lazy decode views. The Lua module
+is named `pb` to avoid colliding with Tarantool's encode-only built-in
+`protobuf` module. This rockspec installs only the runtime; the
+`protoc-gen-tarantool` plugin must be built separately from the Go
+sources (see Justfile).
+]],
+    homepage = "https://sourcecraft.dev/bigbes/tarantool-protobuf",
+    license  = "BSD-2-Clause",
+    maintainer = "Eugene Blikh <bigbes@gmail.com>",
+}
+
+dependencies = {
+    "lua >= 5.1",
+}
+
+build = {
+    type = "builtin",
+    modules = {
+        ["pb"]               = "runtime/pb/init.lua",
+        ["pb.codec"]         = "runtime/pb/codec.lua",
+        ["pb.descriptor_pb"] = "runtime/pb/descriptor_pb.lua",
+        ["pb.dynamic"]       = "runtime/pb/dynamic.lua",
+        ["pb.fileset"]       = "runtime/pb/fileset.lua",
+        ["pb.grpc"]          = "runtime/pb/grpc.lua",
+        ["pb.json"]          = "runtime/pb/json.lua",
+        ["pb.lazy"]          = "runtime/pb/lazy.lua",
+        ["pb.parser"]        = "runtime/pb/parser.lua",
+        ["pb.text"]          = "runtime/pb/text.lua",
+        ["pb.wire"]          = "runtime/pb/wire.lua",
+        ["pb.wkt"]           = "runtime/pb/wkt.lua",
+    },
+}