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.bazelrc

@@ -44,3 +44,6 @@ build:macos --macos_minimum_os=10.15
 #  bazel run //bazel:setup_configs > fuzztest.bazelrc
 #
 try-import %workspace%/fuzztest.bazelrc
+
+# Configure rules_rust to use the nightly channel toolchain by default.
+build --@rules_rust//rust/toolchain/channel:channel=nightly

.github/workflows/cargo_test.yml

@@ -0,0 +1,81 @@
+# 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.
+
+name: Cargo Test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  schedule:
+    # Triggered nightly at 8:00 AM UTC to reset the Bazel & Cargo caches.
+    - cron: '0 8 * * *'
+  workflow_dispatch:
+
+env:
+  CARGO_TERM_COLOR: always
+
+permissions:
+  contents: read
+
+jobs:
+  run_cargo_tests:
+    name: Run Cargo tests
+    runs-on: ubuntu-22.04
+    timeout-minutes: 60
+    steps:
+      - name: Disable core dumping and piping due to slowness
+        run: |
+          sudo sysctl -w kernel.core_pattern=""
+
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update && sudo apt-get install -yq \
+            clang
+
+      - name: Setup Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          toolchain: nightly
+
+      - name: Restore Bazel cache
+        uses: actions/cache/restore@v4
+        with:
+          path: "~/.cache/bazel"
+          key: bazel-centipede-cache-cargo-test-${{ github.run_id }}
+          restore-keys: |
+            bazel-centipede-cache-cargo-test-
+            bazel-centipede-cache-default-
+
+      - name: Build Centipede static library and binary with Bazel
+        run: |
+          bazel build -c opt //centipede:centipede_engine_static //centipede:centipede
+
+      - name: Run Cargo workspace tests
+        env:
+          FUZZTEST_LIB_PATH: ${{ github.workspace }}/bazel-bin/centipede
+          CENTIPEDE_BINARY_PATH: ${{ github.workspace }}/bazel-bin/centipede/centipede
+        run: |
+          cargo test --locked --workspace --no-fail-fast -- --test-threads=1
+
+      - name: Save Bazel cache based on main
+        if: github.ref == 'refs/heads/main'
+        uses: actions/cache/save@v4
+        with:
+          path: "~/.cache/bazel"
+          key: bazel-centipede-cache-cargo-test-${{ github.run_id }}

BUILD.bazel

@@ -0,0 +1 @@
+exports_files(["MODULE.bazel"])