diff --git a/defs.bzl b/defs.bzl
index b3f5441bcd6..0002bdd2aaf 100644
--- a/defs.bzl
+++ b/defs.bzl
@@ -4,7 +4,7 @@ load("@rules_rust//rust:repositories.bzl", "rust_repositories")
 load("@net_ankiweb_anki//cargo:crates.bzl", "raze_fetch_remote_crates")
 load(":python.bzl", "setup_local_python")
 load(":protobuf.bzl", "setup_protobuf_binary")
-load("//rslib:clang_format.bzl", "setup_clang_format")
+load("//proto:format.bzl", "setup_clang_format")
 load("@build_bazel_rules_nodejs//:index.bzl", "node_repositories", "yarn_install")
 load("@io_bazel_rules_sass//:defs.bzl", "sass_repositories")
 load("@com_github_ali5h_rules_pip//:defs.bzl", "pip_import")
diff --git a/rslib/.clang-format b/proto/.clang-format
similarity index 100%
rename from rslib/.clang-format
rename to proto/.clang-format
diff --git a/proto/BUILD.bazel b/proto/BUILD.bazel
new file mode 100644
index 00000000000..da881c35254
--- /dev/null
+++ b/proto/BUILD.bazel
@@ -0,0 +1,18 @@
+# Copyright: Ankitects Pty Ltd and contributors
+# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
+load("@rules_proto//proto:defs.bzl", "proto_library")
+load("//proto:clang_format.bzl", "proto_format")
+
+proto_format(
+    name = "format",
+    srcs = ["backend.proto"],
+)
+
+proto_library(
+    name = "backend_proto_lib",
+    srcs = ["backend.proto"],
+    visibility = ["//visibility:public"],
+)
+
+exports_files(["backend.proto"])
diff --git a/rslib/backend.proto b/proto/backend.proto
similarity index 100%
rename from rslib/backend.proto
rename to proto/backend.proto
diff --git a/rslib/clang_format.bzl b/proto/clang_format.bzl
similarity index 98%
rename from rslib/clang_format.bzl
rename to proto/clang_format.bzl
index 3591a82c085..165e82bd277 100644
--- a/rslib/clang_format.bzl
+++ b/proto/clang_format.bzl
@@ -68,7 +68,7 @@ def proto_format(name, srcs, **kwargs):
     py_test(
         name = name,
         srcs = [
-            "proto_format.py",
+            "format.py",
         ],
         data = ["@clang_format//:clang_format"] + srcs,
         args = ["$(location @clang_format//:clang_format)"] + [native.package_name() + "/" + f for f in srcs],
diff --git a/proto/format.bzl b/proto/format.bzl
new file mode 100644
index 00000000000..165e82bd277
--- /dev/null
+++ b/proto/format.bzl
@@ -0,0 +1,76 @@
+# Copyright: Ankitects Pty Ltd and contributors
+# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
+"""
+Exposes a clang-format binary for formatting protobuf.
+"""
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+load("@rules_python//python:defs.bzl", "py_test")
+
+def _impl(rctx):
+    rctx.file("BUILD.bazel", """
+alias(
+    name = "clang_format",
+    actual = select({
+        "@net_ankiweb_anki//platforms:windows_x86_64": "@clang_format_windows_x86_64//:clang-format.exe",
+        "@net_ankiweb_anki//platforms:macos_x86_64": "@clang_format_macos_x86_64//:clang-format",
+        "@net_ankiweb_anki//platforms:linux_x86_64": "@clang_format_linux_x86_64//:clang-format",
+    }),
+    visibility = ["//visibility:public"]
+)
+""")
+
+_setup_clang_format = repository_rule(
+    attrs = {},
+    local = True,
+    implementation = _impl,
+)
+
+def setup_clang_format(name):
+    maybe(
+        http_archive,
+        name = "clang_format_macos_x86_64",
+        build_file_content = """exports_files(["clang-format"])""",
+        sha256 = "238be68d9478163a945754f06a213483473044f5a004c4125d3d9d8d3556466e",
+        urls = [
+            "https://github.com/ankitects/clang-format-binaries/releases/download/anki-2021-01-09/clang-format_macos_x86_64.zip",
+        ],
+    )
+
+    maybe(
+        http_archive,
+        name = "clang_format_linux_x86_64",
+        build_file_content = """exports_files(["clang-format"])""",
+        sha256 = "64060bc4dbca30d0d96aab9344e2783008b16e1cae019a2532f1126ca5ec5449",
+        urls = [
+            "https://github.com/ankitects/clang-format-binaries/releases/download/anki-2021-01-09/clang-format_linux_x86_64.zip",
+        ],
+    )
+
+    maybe(
+        http_archive,
+        name = "clang_format_windows_x86_64",
+        build_file_content = """exports_files(["clang-format.exe"])""",
+        sha256 = "7d9f6915e3f0fb72407830f0fc37141308d2e6915daba72987a52f309fbeaccc",
+        urls = [
+            "https://github.com/ankitects/clang-format-binaries/releases/download/anki-2021-01-09/clang-format_windows_x86_64.zip",
+        ],
+    )
+
+    if not native.existing_rule(name):
+        _setup_clang_format(
+            name = name,
+        )
+
+def proto_format(name, srcs, **kwargs):
+    py_test(
+        name = name,
+        srcs = [
+            "format.py",
+        ],
+        data = ["@clang_format//:clang_format"] + srcs,
+        args = ["$(location @clang_format//:clang_format)"] + [native.package_name() + "/" + f for f in srcs],
+        **kwargs
+    )
diff --git a/rslib/proto_format.py b/proto/format.py
similarity index 100%
rename from rslib/proto_format.py
rename to proto/format.py
diff --git a/pylib/anki/_backend/BUILD.bazel b/pylib/anki/_backend/BUILD.bazel
index 2cba311d5ea..8a2fdf4ee64 100644
--- a/pylib/anki/_backend/BUILD.bazel
+++ b/pylib/anki/_backend/BUILD.bazel
@@ -6,7 +6,7 @@ load("@bazel_skylib//lib:selects.bzl", "selects")
 
 py_proto_library_typed(
     name = "backend_pb2",
-    src = "//rslib:backend.proto",
+    src = "//proto:backend.proto",
     visibility = [
         "//visibility:public",
     ],
diff --git a/rslib/BUILD.bazel b/rslib/BUILD.bazel
index 988f9f836cb..ccfb727ee37 100644
--- a/rslib/BUILD.bazel
+++ b/rslib/BUILD.bazel
@@ -1,11 +1,9 @@
 # Copyright: Ankitects Pty Ltd and contributors
 # License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
-load("@rules_proto//proto:defs.bzl", "proto_library")
 load("@rules_rust//rust:rust.bzl", "rust_binary", "rust_library", "rust_test")
 load("@rules_rust//cargo:cargo_build_script.bzl", "cargo_build_script")
 load(":rustfmt.bzl", "rustfmt_fix", "rustfmt_test")
-load(":clang_format.bzl", "proto_format")
 load("//ts:sql_format.bzl", "sql_format")
 
 # Build script
@@ -15,7 +13,7 @@ cargo_build_script(
     name = "build_script",
     srcs = glob(["build/*.rs"]),
     build_script_env = {
-        "BACKEND_PROTO": "$(location backend.proto)",
+        "BACKEND_PROTO": "$(location //proto:backend.proto)",
         "PROTOC": "$(location @com_google_protobuf//:protoc)",
         "RSLIB_FTL_ROOT": "$(location @rslib_ftl//:l10n.toml)",
         "EXTRA_FTL_ROOT": "$(location @extra_ftl//:l10n.toml)",
@@ -24,7 +22,7 @@ cargo_build_script(
     crate_root = "build/main.rs",
     data = [
         "//ftl",
-        "backend.proto",
+        "//proto:backend.proto",
         "@com_google_protobuf//:protoc",
         # bazel requires us to list these out separately
         "@rslib_ftl//:l10n.toml",
@@ -163,19 +161,3 @@ sql_format(
     name = "sql_format",
     srcs = glob(["**/*.sql"]),
 )
-
-proto_format(
-    name = "proto_format",
-    srcs = ["backend.proto"],
-)
-
-# backend.proto
-#######################
-
-proto_library(
-    name = "backend_proto_lib",
-    srcs = ["backend.proto"],
-    visibility = ["//visibility:public"],
-)
-
-exports_files(["backend.proto"])
diff --git a/rslib/build/protobuf.rs b/rslib/build/protobuf.rs
index 42c0440a33d..23f05628d62 100644
--- a/rslib/build/protobuf.rs
+++ b/rslib/build/protobuf.rs
@@ -80,7 +80,7 @@ pub fn write_backend_proto_rs() {
         proto_dir = backend_proto.parent().unwrap().to_owned();
     } else {
         backend_proto = PathBuf::from("backend.proto");
-        proto_dir = PathBuf::from(".");
+        proto_dir = PathBuf::from("../proto");
     }
     println!("cargo:rerun-if-changed={}", backend_proto.to_str().unwrap());
 
diff --git a/ts/lib/BUILD.bazel b/ts/lib/BUILD.bazel
index 6f0f913661f..ba27d66afef 100644
--- a/ts/lib/BUILD.bazel
+++ b/ts/lib/BUILD.bazel
@@ -9,7 +9,7 @@ load("//ts:jest.bzl", "jest_test")
 
 protobufjs_library(
     name = "backend_proto",
-    proto = "//rslib:backend_proto_lib",
+    proto = "//proto:backend_proto_lib",
     visibility = ["//visibility:public"],
 )