diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index c9c5c4ba..378ca8ef 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -24,3 +24,55 @@
 
 # Documentation source.
 /docs/                         @farhadrgh @saeepaliwal
+
+# subquadratic-ops kernel bindings.
+#
+# @moradza maintains the upstream subquadratic-ops package these files bind to,
+# so a change to the wrapper layer, its dtype/shape marshalling, or the
+# torch.compile lowering should reach him automatically rather than by memory.
+#
+# He is listed ALONGSIDE the default owners, not instead of them: GitHub
+# requires an approval from at least one codeowner per changed file, so this
+# auto-requests his review without making him a hard blocker when he is
+# unavailable. To make his approval mandatory for these paths, list @moradza
+# alone on the line — note that would also stop @farhadrgh self-approving
+# kernel changes.
+/nvsubquadratic/ops/fftconv_custom.py               @farhadrgh @saeepaliwal @moradza
+/nvsubquadratic/ops/fftconv_lowering.py             @farhadrgh @saeepaliwal @moradza
+/nvsubquadratic/ops/causal_conv1d_custom.py         @farhadrgh @saeepaliwal @moradza
+/nvsubquadratic/modules/subq_ops_causal_conv1d.py   @farhadrgh @saeepaliwal @moradza
+/tests/ops/test_fused_fftconv2d.py                  @farhadrgh @saeepaliwal @moradza
+/tests/ops/test_fftconv_lowering.py                 @farhadrgh @saeepaliwal @moradza
+/tests/ops/test_fftconv_custom.py                   @farhadrgh @saeepaliwal @moradza
+/tests/ops/test_fftconv_custom_1d.py                @farhadrgh @saeepaliwal @moradza
+/tests/ops/test_causal_conv1d_custom.py             @farhadrgh @saeepaliwal @moradza
+/tests/ops/test_subq_ops_fft_conv2d.py              @farhadrgh @saeepaliwal @moradza
+/tests/modules/test_subq_ops_causal_conv1d.py       @farhadrgh @saeepaliwal @moradza
+/tests/modules/test_ckconv_nd_subq.py               @farhadrgh @saeepaliwal @moradza
+
+# ⚠️ PREREQUISITE for the two sections below: a CODEOWNERS entry naming a user
+# WITHOUT write access to this repo is silently ignored — no auto-request, no
+# required review, and no error beyond a soft warning in GitHub's CODEOWNERS
+# editor. As of 2026-09-16 @dwromero and @Dafidofff have `read` only, so these
+# rules are inert until someone with admin grants them write (Settings ->
+# Collaborators, or add them to a team with write). @moradza already has write.
+#
+# Note @Dafidofff is David Wessels. A separate `@dwessels` account exists and is
+# NOT him — naming it would produce a rule that silently never fires.
+
+# ImageNet / ViT5 experiments — @Dafidofff and @moradza.
+/benchmarks/vit5_imagenet/                          @farhadrgh @saeepaliwal @Dafidofff @moradza
+/examples/imagenet_classification/                  @farhadrgh @saeepaliwal @Dafidofff @moradza
+/examples/vit5_imagenet/                            @farhadrgh @saeepaliwal @Dafidofff @moradza
+/reports/vit5_imagenet_dataloader_profiling/        @farhadrgh @saeepaliwal @Dafidofff @moradza
+/experiments/datamodules/dali_imagenet_fused.py     @farhadrgh @saeepaliwal @Dafidofff @moradza
+/experiments/datamodules/tinyimagenet.py            @farhadrgh @saeepaliwal @Dafidofff @moradza
+
+# Spatial-recall experiments — @dwromero and @Dafidofff.
+/examples/spatial_recall_1d/                        @farhadrgh @saeepaliwal @dwromero @Dafidofff
+/examples/spatial_recall_2d/                        @farhadrgh @saeepaliwal @dwromero @Dafidofff
+/examples/spatial_recall_3d/                        @farhadrgh @saeepaliwal @dwromero @Dafidofff
+/examples/spatial_recall_v2/                        @farhadrgh @saeepaliwal @dwromero @Dafidofff
+/reports/spatial_recall/                            @farhadrgh @saeepaliwal @dwromero @Dafidofff
+/experiments/datamodules/spatial_recall_dataset.py  @farhadrgh @saeepaliwal @dwromero @Dafidofff
+/tests/test_spatial_recall_motion.py                @farhadrgh @saeepaliwal @dwromero @Dafidofff
diff --git a/.github/workflows/gpu-tests.yml b/.github/workflows/gpu-tests.yml
index 536ed139..5cd33677 100644
--- a/.github/workflows/gpu-tests.yml
+++ b/.github/workflows/gpu-tests.yml
@@ -66,9 +66,30 @@ jobs:
 
       - name: Run pytest
         run: |
+          # pytest runs inside the container, so coverage has to be written to a
+          # bind mount or it disappears with --rm. The image runs as USER ubuntu
+          # (Dockerfile:218), whose uid need not match the runner's, hence 777.
+          mkdir -p "${{ github.workspace }}/coverage"
+          chmod 777 "${{ github.workspace }}/coverage"
           docker run --rm --gpus all \
+            -v "${{ github.workspace }}/coverage:/coverage" \
             nvsubquadratic-ci:${{ github.sha }} \
-            python -m pytest nvsubquadratic/ tests/ -v --tb=short
+            python -m pytest nvsubquadratic/ tests/ -v --tb=short \
+              --cov-report=xml:/coverage/coverage.xml
+          # --cov and --cov-report=term already come from pyproject addopts; this
+          # only adds the machine-readable report Codecov needs.
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v5
+        if: always()
+        continue-on-error: true
+        with:
+          files: ${{ github.workspace }}/coverage/coverage.xml
+          # Never let a Codecov outage or a missing token fail the job this
+          # workflow exists for. gpu-tests is a required status check and takes
+          # ~36 minutes; coverage reporting is not worth blocking a merge over.
+          fail_ci_if_error: false
+          token: ${{ secrets.CODECOV_TOKEN }}
 
       - name: Run distributed CP tests
         run: |
diff --git a/.gitignore b/.gitignore
index 85f56772..508a35d8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,6 +46,7 @@ htmlcov/
 .cache
 nosetests.xml
 coverage.xml
+coverage/
 *.cover
 *.py,cover
 .hypothesis/