diff --git a/.github/workflows/ci-cd.yml b/.github/workflows/ci-cd.yml
index 174dbc17872..b1bde397283 100644
--- a/.github/workflows/ci-cd.yml
+++ b/.github/workflows/ci-cd.yml
@@ -275,8 +275,10 @@ jobs:
         token: ${{ secrets.CODECOV_TOKEN }}
     - name: Upload test results to Codecov
       if: ${{ !cancelled() }}
-      uses: codecov/test-results-action@v1
+      uses: codecov/codecov-action@v6
       with:
+        files: ./junit.xml
+        report_type: test_results
         token: ${{ secrets.CODECOV_TOKEN }}
 
   autobahn:
@@ -360,8 +362,10 @@ jobs:
         token: ${{ secrets.CODECOV_TOKEN }}
     - name: Upload test results to Codecov
       if: ${{ !cancelled() }}
-      uses: codecov/test-results-action@v1
+      uses: codecov/codecov-action@v6
       with:
+        files: ./junit.xml
+        report_type: test_results
         token: ${{ secrets.CODECOV_TOKEN }}
 
   benchmark:
@@ -627,6 +631,12 @@ jobs:
         make cythonize
     - name: Build wheels
       uses: pypa/cibuildwheel@v3.4.1
+      with:
+        # `build-frontend = "build[uv]"` (pyproject.toml) requires uv to be
+        # available on the runner for Windows and macOS. Installing
+        # cibuildwheel with the `uv` extra bundles uv with it; Linux
+        # already has uv inside the manylinux/musllinux container.
+        extras: uv
       env:
         CIBW_SKIP: pp* ${{ matrix.musl == 'musllinux' && '*manylinux*' || '*musllinux*' }}
         CIBW_ARCHS_MACOS: x86_64 arm64 universal2
diff --git a/CHANGES/12588.contrib.rst b/CHANGES/12588.contrib.rst
new file mode 100644
index 00000000000..6c8a5147e41
--- /dev/null
+++ b/CHANGES/12588.contrib.rst
@@ -0,0 +1,5 @@
+Added a ``CLAUDE.md`` at the repository root that imports
+:file:`AGENTS.md` via Claude Code's ``@``-syntax, so the
+project's LLM contributor rules load automatically when
+working in Claude Code
+-- by :user:`aiolibsbot`.
diff --git a/CHANGES/12589.contrib.rst b/CHANGES/12589.contrib.rst
new file mode 100644
index 00000000000..dc7f6400d57
--- /dev/null
+++ b/CHANGES/12589.contrib.rst
@@ -0,0 +1,7 @@
+Restricted the ``isal`` test dependency to CPython, since
+``isal`` 1.8.0 stopped publishing PyPy wheels and the source
+build requires ``nasm``, which is not available on the CI
+runners. The ``parametrize_zlib_backend`` fixture already
+calls ``pytest.importorskip``, so PyPy continues to exercise
+the ``zlib`` and ``zlib_ng`` backends with no further
+changes -- by :user:`bdraco`.
diff --git a/CHANGES/12592.contrib.rst b/CHANGES/12592.contrib.rst
new file mode 100644
index 00000000000..76d2f8b7035
--- /dev/null
+++ b/CHANGES/12592.contrib.rst
@@ -0,0 +1,6 @@
+Fixed a flakey ``test_tcp_connector_fingerprint_ok`` by aborting
+the SSL shutdown on the test's TCP connector before returning.
+The graceful TLS close was occasionally outliving the test event
+loop on one of the CI jobs, and the teardown ``gc.collect()``
+then surfaced the still-open transport as a
+``PytestUnraisableExceptionWarning`` -- by :user:`bdraco`.
diff --git a/CHANGES/12595.contrib.rst b/CHANGES/12595.contrib.rst
new file mode 100644
index 00000000000..54af2262fb1
--- /dev/null
+++ b/CHANGES/12595.contrib.rst
@@ -0,0 +1,5 @@
+Switched the ``cibuildwheel`` build frontend to ``build[uv]`` so
+that ``uv`` provisions every build-isolation virtual environment
+in the wheel matrix, replacing the per-ABI ``pip`` resolve with a
+roughly sub-second ``uv`` resolve
+-- by :user:`bdraco`.
diff --git a/CHANGES/12596.contrib.rst b/CHANGES/12596.contrib.rst
new file mode 100644
index 00000000000..ff96abe5bfc
--- /dev/null
+++ b/CHANGES/12596.contrib.rst
@@ -0,0 +1,4 @@
+Switched the test-results upload step to ``codecov/codecov-action@v6``
+with ``report_type: test_results``, since
+``codecov/test-results-action`` is being deprecated in favor of
+``codecov-action`` -- by :user:`bdraco`.
diff --git a/CHANGES/12600.contrib.rst b/CHANGES/12600.contrib.rst
new file mode 100644
index 00000000000..4d361389191
--- /dev/null
+++ b/CHANGES/12600.contrib.rst
@@ -0,0 +1,4 @@
+Silenced the ``DeprecationWarning`` raised by ``uvloop`` 0.22+ when it
+accesses the ``asyncio.AbstractEventLoopPolicy`` alias that Python 3.14
+marks for removal in 3.16, so the test suite passes against the newer
+``uvloop`` release -- by :user:`bdraco`.
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 00000000000..43c994c2d36
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1 @@
+@AGENTS.md
diff --git a/docs/spelling_wordlist.txt b/docs/spelling_wordlist.txt
index ac9b0a41f2d..352b2e29a64 100644
--- a/docs/spelling_wordlist.txt
+++ b/docs/spelling_wordlist.txt
@@ -1,4 +1,5 @@
 abc
+ABI
 addons
 aiodns
 aioes
diff --git a/pyproject.toml b/pyproject.toml
index 7ad4f54b0c3..06f26bc6995 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -159,6 +159,13 @@ include = [
 
 
 [tool.cibuildwheel]
+# `build[uv]` makes cibuildwheel use `uv` for every venv it provisions,
+# both on the build side (passed to `python -m build` as `--installer=uv`)
+# and when materializing the build isolation environment. uv resolves and
+# installs the build requirements in roughly a second; the previous
+# pip-based path took noticeably longer per ABI and ran once per matrix
+# cell.
+build-frontend = "build[uv]"
 test-command = ""
 # don't build PyPy wheels, install from source instead
 skip = "pp*"
diff --git a/requirements/constraints.txt b/requirements/constraints.txt
index 3638a0bc10c..8ebe46e1298 100644
--- a/requirements/constraints.txt
+++ b/requirements/constraints.txt
@@ -109,7 +109,7 @@ imagesize==2.0.0
     # via sphinx
 iniconfig==2.3.0
     # via pytest
-isal==1.7.2 ; python_version < "3.14"
+isal==1.7.2 ; python_version < "3.14" and implementation_name == "cpython"
     # via
     #   -r requirements/lint.in
     #   -r requirements/test-common.in
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 806030f2a4d..fbb0de86979 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -107,7 +107,7 @@ imagesize==2.0.0
     # via sphinx
 iniconfig==2.3.0
     # via pytest
-isal==1.7.2 ; python_version < "3.14"
+isal==1.7.2 ; python_version < "3.14" and implementation_name == "cpython"
     # via
     #   -r requirements/lint.in
     #   -r requirements/test-common.in
diff --git a/requirements/test-common.in b/requirements/test-common.in
index 049916df15c..b50aed3be7f 100644
--- a/requirements/test-common.in
+++ b/requirements/test-common.in
@@ -1,7 +1,7 @@
 blockbuster
 coverage
 freezegun
-isal; python_version < "3.14" # no wheel for 3.14
+isal; python_version < "3.14" and implementation_name == "cpython" # no wheel for 3.14, no PyPy wheel for 1.8.0+
 mypy; implementation_name == "cpython"
 pkgconfig
 proxy.py >= 2.4.4rc5
diff --git a/requirements/test-common.txt b/requirements/test-common.txt
index 48fc596525d..94aa95d62be 100644
--- a/requirements/test-common.txt
+++ b/requirements/test-common.txt
@@ -50,7 +50,7 @@ idna==3.15
     #   yarl
 iniconfig==2.3.0
     # via pytest
-isal==1.8.0 ; python_version < "3.14"
+isal==1.8.0 ; python_version < "3.14" and implementation_name == "cpython"
     # via -r requirements/test-common.in
 librt==0.11.0
     # via mypy
diff --git a/requirements/test-ft.txt b/requirements/test-ft.txt
index 664e1eb9e5e..fcad3f25513 100644
--- a/requirements/test-ft.txt
+++ b/requirements/test-ft.txt
@@ -67,7 +67,7 @@ idna==3.15
     #   yarl
 iniconfig==2.3.0
     # via pytest
-isal==1.8.0 ; python_version < "3.14"
+isal==1.8.0 ; python_version < "3.14" and implementation_name == "cpython"
     # via -r requirements/test-common.in
 librt==0.11.0
     # via mypy
diff --git a/requirements/test.txt b/requirements/test.txt
index 26c0f57ded8..602e45e91d1 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -67,7 +67,7 @@ idna==3.15
     #   yarl
 iniconfig==2.3.0
     # via pytest
-isal==1.7.2 ; python_version < "3.14"
+isal==1.7.2 ; python_version < "3.14" and implementation_name == "cpython"
     # via -r requirements/test-common.in
 librt==0.11.0
     # via mypy
diff --git a/setup.cfg b/setup.cfg
index f3a5ccbfbb6..8a721800cf3 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -86,6 +86,10 @@ filterwarnings =
     ignore:datetime.*utcnow\(\) is deprecated and scheduled for removal:DeprecationWarning:freezegun.api
     # Weird issue in Python 3.13+ triggered in test_multipart.py
     ignore:coroutine method 'aclose' of 'BodyPartReader._decode_content_async' was never awaited:RuntimeWarning
+    # uvloop 0.22+ accesses the deprecated asyncio.AbstractEventLoopPolicy
+    # alias, which Python 3.14 marks for removal in 3.16. Drop this when
+    # uvloop stops touching the deprecated alias.
+    ignore:'asyncio.AbstractEventLoopPolicy' is deprecated:DeprecationWarning:uvloop
 junit_suite_name = aiohttp_test_suite
 norecursedirs = dist docs build .tox .eggs
 minversion = 3.8.2
diff --git a/tests/test_client_functional.py b/tests/test_client_functional.py
index 9c8e274bab3..cfc2d4529c5 100644
--- a/tests/test_client_functional.py
+++ b/tests/test_client_functional.py
@@ -840,6 +840,12 @@ async def handler(request: web.Request) -> web.Response:
     async with client.get("/") as resp:
         assert resp.status == 200
 
+    # Abort the SSL shutdown explicitly so the pooled TLS transport is
+    # released before the test loop tears down. Otherwise a slow graceful
+    # close can outlive the loop, and the teardown gc.collect() finalises
+    # the still-open socket as an unraisable ResourceWarning.
+    await connector.close(abort_ssl=True)
+
 
 async def test_tcp_connector_fingerprint_fail(
     aiohttp_server: AiohttpServer,