ci: enable the Windows Bazel workflow path

.github/workflows/bazel.yml

@@ -17,6 +17,7 @@ concurrency:
   cancel-in-progress: ${{ github.ref_name != 'main' }}
 jobs:
   test:
+    timeout-minutes: 120
     strategy:
       fail-fast: false
       matrix:
@@ -39,9 +40,9 @@ jobs:
           # - os: ubuntu-24.04-arm
           #   target: aarch64-unknown-linux-gnu
 
-          # TODO: Enable Windows once we fix the toolchain issues there.
-          #- os: windows-latest
-          #  target: x86_64-pc-windows-gnullvm
+          # Windows
+          - os: windows-latest
+            target: x86_64-pc-windows-gnullvm
     runs-on: ${{ matrix.os }}
 
     # Configure a human readable name for each job
@@ -94,8 +95,14 @@ jobs:
         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
+          # Use a very short path to reduce argv/path length issues, but avoid the
+          # drive root because some Windows test launchers mis-handle MANIFEST paths there.
+          "BAZEL_STARTUP_ARGS=--output_user_root=D:\b" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
+      - name: Enable Git long paths (Windows)
+        if: runner.os == 'Windows'
+        shell: pwsh
+        run: git config --global core.longpaths true
 
       - name: bazel test //...
         env:
@@ -153,6 +160,38 @@ jobs:
             # canary and release workflows should build `third_party/v8`.
             -//third_party/v8:all
           )
+          if [[ "${RUNNER_OS:-}" == "Windows" ]]; then
+            # A `//...`-based query still loads `third_party/v8` on Windows even if
+            # we subtract the final labels, and Bazel 9 currently crashes during
+            # that analysis. Query within `//codex-rs/...` so the Windows smoke
+            # suite is discovered dynamically without touching the V8 packages.
+            #
+            # `v8-poc` contributes direct Windows targets here, while `code-mode`
+            # still pulls the external `v8` crate in transitively through a wider
+            # set of higher-level tests. `shell-command` stays out of the Windows
+            # smoke suite for now because its Bazel test still times out on the
+            # GitHub runner.
+            windows_target_query="
+              let windows_smoke = filter(
+                '(^|:).*(-unit-tests|schema_fixtures-test)$',
+                tests(
+                  //codex-rs/...
+                  except //codex-rs/code-mode/...
+                  except //codex-rs/shell-command/...
+                  except //codex-rs/v8-poc/...
+                )
+              ) in
+              \$windows_smoke except filter(
+                '(^|:).*(-unit-tests|schema_fixtures-test)$',
+                rdeps(\$windows_smoke, //codex-rs/code-mode:code-mode)
+              )
+            "
+            mapfile -t bazel_targets < <(
+              bazel $BAZEL_STARTUP_ARGS query "$windows_target_query" --keep_going \
+                | sort -u
+            )
+            echo "Windows smoke target count: ${#bazel_targets[@]}"
+          fi
 
           if [[ "${RUNNER_OS:-}" != "Windows" ]]; then
             # Bazel test sandboxes on macOS may resolve an older Homebrew `node`