diff --git a/.github/actions/setup-bazel-ci/action.yml b/.github/actions/setup-bazel-ci/action.yml
new file mode 100644
index 0000000000..a737ec8244
--- /dev/null
+++ b/.github/actions/setup-bazel-ci/action.yml
@@ -0,0 +1,61 @@
+name: setup-bazel-ci
+description: Prepare a Bazel CI runner with shared caches and optional test prerequisites.
+inputs:
+  target:
+    description: Target triple used for cache namespacing.
+    required: true
+  install-test-prereqs:
+    description: Install Node.js and DotSlash for Bazel-backed test jobs.
+    required: false
+    default: "false"
+outputs:
+  cache-hit:
+    description: Whether the Bazel repository cache key was restored exactly.
+    value: ${{ steps.cache_bazel_repository_restore.outputs.cache-hit }}
+
+runs:
+  using: composite
+  steps:
+    - name: Set up Node.js for js_repl tests
+      if: inputs.install-test-prereqs == 'true'
+      uses: actions/setup-node@v6
+      with:
+        node-version-file: codex-rs/node-version.txt
+
+    # Some integration tests rely on DotSlash being installed.
+    # See https://github.com/openai/codex/pull/7617.
+    - name: Install DotSlash
+      if: inputs.install-test-prereqs == 'true'
+      uses: facebook/install-dotslash@v2
+
+    - name: Make DotSlash available in PATH (Unix)
+      if: inputs.install-test-prereqs == 'true' && runner.os != 'Windows'
+      shell: bash
+      run: cp "$(which dotslash)" /usr/local/bin
+
+    - name: Make DotSlash available in PATH (Windows)
+      if: inputs.install-test-prereqs == 'true' && runner.os == 'Windows'
+      shell: pwsh
+      run: Copy-Item (Get-Command dotslash).Source -Destination "$env:LOCALAPPDATA\Microsoft\WindowsApps\dotslash.exe"
+
+    - name: Set up Bazel
+      uses: bazelbuild/setup-bazelisk@v3
+
+    # Restore bazel repository cache so we don't have to redownload all the external dependencies
+    # on every CI run.
+    - name: Restore bazel repository cache
+      id: cache_bazel_repository_restore
+      uses: actions/cache/restore@v5
+      with:
+        path: |
+          ~/.cache/bazel-repo-cache
+        key: bazel-cache-${{ inputs.target }}-${{ hashFiles('MODULE.bazel', 'codex-rs/Cargo.lock', 'codex-rs/Cargo.toml') }}
+        restore-keys: |
+          bazel-cache-${{ inputs.target }}
+
+    - name: Configure Bazel startup args (Windows)
+      if: runner.os == 'Windows'
+      shell: pwsh
+      run: |
+        # Use a very short path to reduce argv/path length issues.
+        "BAZEL_STARTUP_ARGS=--output_user_root=C:\" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
diff --git a/.github/scripts/run-bazel-ci.sh b/.github/scripts/run-bazel-ci.sh
new file mode 100755
index 0000000000..06bc97cded
--- /dev/null
+++ b/.github/scripts/run-bazel-ci.sh
@@ -0,0 +1,179 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+set -o pipefail
+
+print_failed_bazel_test_logs=0
+use_node_test_env=0
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --print-failed-test-logs)
+      print_failed_bazel_test_logs=1
+      shift
+      ;;
+    --use-node-test-env)
+      use_node_test_env=1
+      shift
+      ;;
+    --)
+      shift
+      break
+      ;;
+    *)
+      echo "Unknown option: $1" >&2
+      exit 1
+      ;;
+  esac
+done
+
+if [[ $# -eq 0 ]]; then
+  echo "Usage: $0 [--print-failed-test-logs] [--use-node-test-env] -- <bazel args> -- <targets>" >&2
+  exit 1
+fi
+
+bazel_startup_args=()
+if [[ -n "${BAZEL_STARTUP_ARGS:-}" ]]; then
+  read -r -a bazel_startup_args <<< "${BAZEL_STARTUP_ARGS}"
+fi
+
+ci_config=ci-linux
+case "${RUNNER_OS:-}" in
+  macOS)
+    ci_config=ci-macos
+    ;;
+  Windows)
+    ci_config=ci-windows
+    ;;
+esac
+
+print_bazel_test_log_tails() {
+  local console_log="$1"
+  local testlogs_dir
+  local -a bazel_info_cmd=(bazel)
+
+  if (( ${#bazel_startup_args[@]} > 0 )); then
+    bazel_info_cmd+=("${bazel_startup_args[@]}")
+  fi
+
+  testlogs_dir="$("${bazel_info_cmd[@]}" info bazel-testlogs 2>/dev/null || echo bazel-testlogs)"
+
+  local failed_targets=()
+  while IFS= read -r target; do
+    failed_targets+=("$target")
+  done < <(
+    grep -E '^FAIL: //' "$console_log" \
+      | sed -E 's#^FAIL: (//[^ ]+).*#\1#' \
+      | sort -u
+  )
+
+  if [[ ${#failed_targets[@]} -eq 0 ]]; then
+    echo "No failed Bazel test targets were found in console output."
+    return
+  fi
+
+  for target in "${failed_targets[@]}"; do
+    local rel_path="${target#//}"
+    rel_path="${rel_path/:/\/}"
+    local test_log="${testlogs_dir}/${rel_path}/test.log"
+
+    echo "::group::Bazel test log tail for ${target}"
+    if [[ -f "$test_log" ]]; then
+      tail -n 200 "$test_log"
+    else
+      echo "Missing test log: $test_log"
+    fi
+    echo "::endgroup::"
+  done
+}
+
+bazel_args=()
+bazel_targets=()
+found_target_separator=0
+for arg in "$@"; do
+  if [[ "$arg" == "--" && $found_target_separator -eq 0 ]]; then
+    found_target_separator=1
+    continue
+  fi
+
+  if [[ $found_target_separator -eq 0 ]]; then
+    bazel_args+=("$arg")
+  else
+    bazel_targets+=("$arg")
+  fi
+done
+
+if [[ ${#bazel_args[@]} -eq 0 || ${#bazel_targets[@]} -eq 0 ]]; then
+  echo "Expected Bazel args and targets separated by --" >&2
+  exit 1
+fi
+
+if [[ $use_node_test_env -eq 1 && "${RUNNER_OS:-}" != "Windows" ]]; then
+  # Bazel test sandboxes on macOS may resolve an older Homebrew `node`
+  # before the `actions/setup-node` runtime on PATH.
+  node_bin="$(which node)"
+  bazel_args+=("--test_env=CODEX_JS_REPL_NODE_PATH=${node_bin}")
+fi
+
+bazel_console_log="$(mktemp)"
+trap 'rm -f "$bazel_console_log"' EXIT
+
+bazel_cmd=(bazel)
+if (( ${#bazel_startup_args[@]} > 0 )); then
+  bazel_cmd+=("${bazel_startup_args[@]}")
+fi
+
+if [[ -n "${BUILDBUDDY_API_KEY:-}" ]]; then
+  echo "BuildBuddy API key is available; using remote Bazel configuration."
+  # Work around Bazel 9 remote repo contents cache / overlay materialization failures
+  # seen in CI (for example "is not a symlink" or permission errors while
+  # materializing external repos such as rules_perl). We still use BuildBuddy for
+  # remote execution/cache; this only disables the startup-level repo contents cache.
+  set +e
+  "${bazel_cmd[@]}" \
+    --noexperimental_remote_repo_contents_cache \
+    "${bazel_args[@]}" \
+    "--config=${ci_config}" \
+    "--remote_header=x-buildbuddy-api-key=${BUILDBUDDY_API_KEY}" \
+    -- \
+    "${bazel_targets[@]}" \
+    2>&1 | tee "$bazel_console_log"
+  bazel_status=${PIPESTATUS[0]}
+  set -e
+else
+  echo "BuildBuddy API key is not available; using local Bazel configuration."
+  # Keep fork/community PRs on Bazel but disable remote services that are
+  # configured in .bazelrc and require auth.
+  #
+  # Flag docs:
+  # - Command-line reference: https://bazel.build/reference/command-line-reference
+  # - Remote caching overview: https://bazel.build/remote/caching
+  # - Remote execution overview: https://bazel.build/remote/rbe
+  # - Build Event Protocol overview: https://bazel.build/remote/bep
+  #
+  # --noexperimental_remote_repo_contents_cache:
+  #   disable remote repo contents cache enabled in .bazelrc startup options.
+  #   https://bazel.build/reference/command-line-reference#startup_options-flag--experimental_remote_repo_contents_cache
+  # --remote_cache= and --remote_executor=:
+  #   clear remote cache/execution endpoints configured in .bazelrc.
+  #   https://bazel.build/reference/command-line-reference#common_options-flag--remote_cache
+  #   https://bazel.build/reference/command-line-reference#common_options-flag--remote_executor
+  set +e
+  "${bazel_cmd[@]}" \
+    --noexperimental_remote_repo_contents_cache \
+    "${bazel_args[@]}" \
+    --remote_cache= \
+    --remote_executor= \
+    -- \
+    "${bazel_targets[@]}" \
+    2>&1 | tee "$bazel_console_log"
+  bazel_status=${PIPESTATUS[0]}
+  set -e
+fi
+
+if [[ ${bazel_status:-0} -ne 0 ]]; then
+  if [[ $print_failed_bazel_test_logs -eq 1 ]]; then
+    print_bazel_test_log_tails "$bazel_console_log"
+  fi
+  exit "$bazel_status"
+fi
diff --git a/.github/workflows/bazel.yml b/.github/workflows/bazel.yml
index 9a647903cc..3555a52664 100644
--- a/.github/workflows/bazel.yml
+++ b/.github/workflows/bazel.yml
@@ -50,181 +50,40 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - name: Set up Node.js for js_repl tests
-        uses: actions/setup-node@v6
+      - name: Set up Bazel CI
+        id: setup_bazel
+        uses: ./.github/actions/setup-bazel-ci
         with:
-          node-version-file: codex-rs/node-version.txt
-
-      # Some integration tests rely on DotSlash being installed.
-      # See https://github.com/openai/codex/pull/7617.
-      - name: Install DotSlash
-        uses: facebook/install-dotslash@v2
-
-      - name: Make DotSlash available in PATH (Unix)
-        if: runner.os != 'Windows'
-        run: cp "$(which dotslash)" /usr/local/bin
-
-      - name: Make DotSlash available in PATH (Windows)
-        if: runner.os == 'Windows'
-        shell: pwsh
-        run: Copy-Item (Get-Command dotslash).Source -Destination "$env:LOCALAPPDATA\Microsoft\WindowsApps\dotslash.exe"
-
-      # Install Bazel via Bazelisk
-      - name: Set up Bazel
-        uses: bazelbuild/setup-bazelisk@v3
+          target: ${{ matrix.target }}
+          install-test-prereqs: "true"
 
       - name: Check MODULE.bazel.lock is up to date
         if: matrix.os == 'ubuntu-24.04' && matrix.target == 'x86_64-unknown-linux-gnu'
         shell: bash
         run: ./scripts/check-module-bazel-lock.sh
 
-      # Restore bazel repository cache so we don't have to redownload all the external dependencies
-      # on every CI run.
-      - name: Restore bazel repository cache
-        id: cache_bazel_repository_restore
-        uses: actions/cache/restore@v5
-        with:
-          path: |
-            ~/.cache/bazel-repo-cache
-          key: bazel-cache-${{ matrix.target }}-${{ hashFiles('MODULE.bazel', 'codex-rs/Cargo.lock', 'codex-rs/Cargo.toml') }}
-          restore-keys: |
-            bazel-cache-${{ matrix.target }}
-
-      - name: Configure Bazel startup args (Windows)
-        if: runner.os == 'Windows'
-        shell: pwsh
-        run: |
-          # Use a very short path to reduce argv/path length issues.
-          "BAZEL_STARTUP_ARGS=--output_user_root=C:\" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
-
       - name: bazel test //...
         env:
           BUILDBUDDY_API_KEY: ${{ secrets.BUILDBUDDY_API_KEY }}
         shell: bash
         run: |
-          set -o pipefail
-
-          bazel_console_log="$(mktemp)"
-
-          print_failed_bazel_test_logs() {
-            local console_log="$1"
-            local testlogs_dir
-
-            testlogs_dir="$(bazel $BAZEL_STARTUP_ARGS info bazel-testlogs 2>/dev/null || echo bazel-testlogs)"
-
-            local failed_targets=()
-            while IFS= read -r target; do
-              failed_targets+=("$target")
-            done < <(
-              grep -E '^FAIL: //' "$console_log" \
-                | sed -E 's#^FAIL: (//[^ ]+).*#\1#' \
-                | sort -u
-            )
-
-            if [[ ${#failed_targets[@]} -eq 0 ]]; then
-              echo "No failed Bazel test targets were found in console output."
-              return
-            fi
-
-            for target in "${failed_targets[@]}"; do
-              local rel_path="${target#//}"
-              rel_path="${rel_path/:/\/}"
-              local test_log="${testlogs_dir}/${rel_path}/test.log"
-
-              echo "::group::Bazel test log tail for ${target}"
-              if [[ -f "$test_log" ]]; then
-                tail -n 200 "$test_log"
-              else
-                echo "Missing test log: $test_log"
-              fi
-              echo "::endgroup::"
-            done
-          }
-
-          bazel_args=(
-            test
-            --test_verbose_timeout_warnings
-            --build_metadata=COMMIT_SHA=$(git rev-parse HEAD)
-          )
-
-          bazel_targets=(
-            //...
-            # Keep V8 out of the ordinary Bazel CI path. Only the dedicated
-            # canary and release workflows should build `third_party/v8`.
+          # Keep V8 out of the ordinary Bazel CI path. Only the dedicated
+          # canary and release workflows should build `third_party/v8`.
+          ./.github/scripts/run-bazel-ci.sh \
+            --print-failed-test-logs \
+            --use-node-test-env \
+            -- \
+            test \
+            --test_verbose_timeout_warnings \
+            --build_metadata=COMMIT_SHA=${GITHUB_SHA} \
+            -- \
+            //... \
             -//third_party/v8:all
-          )
-
-          if [[ "${RUNNER_OS:-}" != "Windows" ]]; then
-            # Bazel test sandboxes on macOS may resolve an older Homebrew `node`
-            # before the `actions/setup-node` runtime on PATH.
-            node_bin="$(which node)"
-            bazel_args+=("--test_env=CODEX_JS_REPL_NODE_PATH=${node_bin}")
-          fi
-
-          ci_config=ci-linux
-          if [[ "${RUNNER_OS:-}" == "macOS" ]]; then
-            ci_config=ci-macos
-          elif [[ "${RUNNER_OS:-}" == "Windows" ]]; then
-            ci_config=ci-windows
-          fi
-
-          if [[ -n "${BUILDBUDDY_API_KEY:-}" ]]; then
-            echo "BuildBuddy API key is available; using remote Bazel configuration."
-            # Work around Bazel 9 remote repo contents cache / overlay materialization failures
-            # seen in CI (for example "is not a symlink" or permission errors while
-            # materializing external repos such as rules_perl). We still use BuildBuddy for
-            # remote execution/cache; this only disables the startup-level repo contents cache.
-            set +e
-            bazel $BAZEL_STARTUP_ARGS \
-              --noexperimental_remote_repo_contents_cache \
-              "${bazel_args[@]}" \
-              "--config=${ci_config}" \
-              "--remote_header=x-buildbuddy-api-key=$BUILDBUDDY_API_KEY" \
-              -- \
-              "${bazel_targets[@]}" \
-              2>&1 | tee "$bazel_console_log"
-            bazel_status=${PIPESTATUS[0]}
-            set -e
-          else
-            echo "BuildBuddy API key is not available; using local Bazel configuration."
-            # Keep fork/community PRs on Bazel but disable remote services that are
-            # configured in .bazelrc and require auth.
-            #
-            # Flag docs:
-            # - Command-line reference: https://bazel.build/reference/command-line-reference
-            # - Remote caching overview: https://bazel.build/remote/caching
-            # - Remote execution overview: https://bazel.build/remote/rbe
-            # - Build Event Protocol overview: https://bazel.build/remote/bep
-            #
-            # --noexperimental_remote_repo_contents_cache:
-            #   disable remote repo contents cache enabled in .bazelrc startup options.
-            #   https://bazel.build/reference/command-line-reference#startup_options-flag--experimental_remote_repo_contents_cache
-            # --remote_cache= and --remote_executor=:
-            #   clear remote cache/execution endpoints configured in .bazelrc.
-            #   https://bazel.build/reference/command-line-reference#common_options-flag--remote_cache
-            #   https://bazel.build/reference/command-line-reference#common_options-flag--remote_executor
-            set +e
-            bazel $BAZEL_STARTUP_ARGS \
-              --noexperimental_remote_repo_contents_cache \
-              "${bazel_args[@]}" \
-              --remote_cache= \
-              --remote_executor= \
-              -- \
-              "${bazel_targets[@]}" \
-              2>&1 | tee "$bazel_console_log"
-            bazel_status=${PIPESTATUS[0]}
-            set -e
-          fi
-
-          if [[ ${bazel_status:-0} -ne 0 ]]; then
-            print_failed_bazel_test_logs "$bazel_console_log"
-            exit "$bazel_status"
-          fi
 
       # Save bazel repository cache explicitly; make non-fatal so cache uploading
       # never fails the overall job. Only save when key wasn't hit.
       - name: Save bazel repository cache
-        if: always() && !cancelled() && steps.cache_bazel_repository_restore.outputs.cache-hit != 'true'
+        if: always() && !cancelled() && steps.setup_bazel.outputs.cache-hit != 'true'
         continue-on-error: true
         uses: actions/cache/save@v5
         with:
@@ -233,75 +92,52 @@ jobs:
           key: bazel-cache-${{ matrix.target }}-${{ hashFiles('MODULE.bazel', 'codex-rs/Cargo.lock', 'codex-rs/Cargo.toml') }}
 
   clippy:
-    runs-on: ubuntu-24.04
-    name: Bazel clippy for codex-rs
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # Keep Linux lint coverage on x64 and add the arm64 macOS path that
+          # the Bazel test job already exercises.
+          - os: ubuntu-24.04
+            target: x86_64-unknown-linux-gnu
+          - os: macos-15-xlarge
+            target: aarch64-apple-darwin
+    runs-on: ${{ matrix.os }}
+    name: Bazel clippy on ${{ matrix.os }} for ${{ matrix.target }}
 
     steps:
       - uses: actions/checkout@v6
 
-      - name: Set up Bazel
-        uses: bazelbuild/setup-bazelisk@v3
-
-      # Restore bazel repository cache so we don't have to redownload all the external dependencies
-      # on every CI run.
-      - name: Restore bazel repository cache
-        id: cache_bazel_repository_restore
-        uses: actions/cache/restore@v5
+      - name: Set up Bazel CI
+        id: setup_bazel
+        uses: ./.github/actions/setup-bazel-ci
         with:
-          path: |
-            ~/.cache/bazel-repo-cache
-          key: bazel-cache-x86_64-unknown-linux-gnu-${{ hashFiles('MODULE.bazel', 'codex-rs/Cargo.lock', 'codex-rs/Cargo.toml') }}
-          restore-keys: |
-            bazel-cache-x86_64-unknown-linux-gnu
+          target: ${{ matrix.target }}
 
       - name: bazel build --config=clippy //codex-rs/...
         env:
           BUILDBUDDY_API_KEY: ${{ secrets.BUILDBUDDY_API_KEY }}
         shell: bash
         run: |
-          set -o pipefail
-
-          bazel_args=(
-            build
-            --config=ci-linux
-            --config=clippy
-            --build_metadata=COMMIT_SHA=$(git rev-parse HEAD)
-            --build_metadata=TAG_job=clippy
-          )
-
-          bazel_targets=(
-            //codex-rs/...
-            # Keep the initial Bazel clippy scope on codex-rs and out of the
-            # V8 proof-of-concept target for now.
+          # Keep the initial Bazel clippy scope on codex-rs and out of the
+          # V8 proof-of-concept target for now.
+          ./.github/scripts/run-bazel-ci.sh \
+            -- \
+            build \
+            --config=clippy \
+            --build_metadata=COMMIT_SHA=${GITHUB_SHA} \
+            --build_metadata=TAG_job=clippy \
+            -- \
+            //codex-rs/... \
             -//codex-rs/v8-poc:all
-          )
-
-          if [[ -n "${BUILDBUDDY_API_KEY:-}" ]]; then
-            echo "BuildBuddy API key is available; using remote Bazel configuration."
-            bazel $BAZEL_STARTUP_ARGS \
-              --noexperimental_remote_repo_contents_cache \
-              "${bazel_args[@]}" \
-              --remote_header="x-buildbuddy-api-key=$BUILDBUDDY_API_KEY" \
-              -- \
-              "${bazel_targets[@]}"
-          else
-            echo "BuildBuddy API key is not available; using local Bazel configuration."
-            bazel $BAZEL_STARTUP_ARGS \
-              --noexperimental_remote_repo_contents_cache \
-              "${bazel_args[@]}" \
-              --remote_cache= \
-              --remote_executor= \
-              -- \
-              "${bazel_targets[@]}"
-          fi
 
       # Save bazel repository cache explicitly; make non-fatal so cache uploading
       # never fails the overall job. Only save when key wasn't hit.
       - name: Save bazel repository cache
-        if: always() && !cancelled() && steps.cache_bazel_repository_restore.outputs.cache-hit != 'true'
+        if: always() && !cancelled() && steps.setup_bazel.outputs.cache-hit != 'true'
         continue-on-error: true
         uses: actions/cache/save@v5
         with:
           path: |
             ~/.cache/bazel-repo-cache
-          key: bazel-cache-x86_64-unknown-linux-gnu-${{ hashFiles('MODULE.bazel', 'codex-rs/Cargo.lock', 'codex-rs/Cargo.toml') }}
+          key: bazel-cache-${{ matrix.target }}-${{ hashFiles('MODULE.bazel', 'codex-rs/Cargo.lock', 'codex-rs/Cargo.toml') }}