diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 09b8858d09f712..d1e9fff37d3c2d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -59,7 +59,7 @@ jobs:
         with:
           fetch-depth: 1
       - name: Runner image version
-        run: echo "IMAGE_VERSION=${ImageVersion}" >> $GITHUB_ENV
+        run: echo "IMAGE_VERSION=${ImageVersion}" >> "$GITHUB_ENV"
       - name: Check Autoconf and aclocal versions
         run: |
           grep "Generated by GNU Autoconf 2.71" configure
@@ -98,7 +98,7 @@ jobs:
         with:
           python-version: '3.x'
       - name: Runner image version
-        run: echo "IMAGE_VERSION=${ImageVersion}" >> $GITHUB_ENV
+        run: echo "IMAGE_VERSION=${ImageVersion}" >> "$GITHUB_ENV"
       - name: Restore config.cache
         uses: actions/cache@v4
         with:
@@ -108,7 +108,7 @@ jobs:
       - name: Install Dependencies
         run: sudo ./.github/workflows/posix-deps-apt.sh
       - name: Add ccache to PATH
-        run: echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+        run: echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
       - name: Configure ccache action
         uses: hendrikmuhs/ccache-action@v1.2
         with:
@@ -247,7 +247,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Runner image version
-      run: echo "IMAGE_VERSION=${ImageVersion}" >> $GITHUB_ENV
+      run: echo "IMAGE_VERSION=${ImageVersion}" >> "$GITHUB_ENV"
     - name: Restore config.cache
       uses: actions/cache@v4
       with:
@@ -259,9 +259,9 @@ jobs:
       run: sudo ./.github/workflows/posix-deps-apt.sh
     - name: Configure OpenSSL env vars
       run: |
-        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> $GITHUB_ENV
-        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> $GITHUB_ENV
-        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> $GITHUB_ENV
+        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
+        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
+        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
     - name: 'Restore OpenSSL build'
       id: cache-openssl
       uses: actions/cache@v4
@@ -270,16 +270,16 @@ jobs:
         key: ${{ matrix.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
     - name: Install OpenSSL
       if: steps.cache-openssl.outputs.cache-hit != 'true'
-      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory $MULTISSL_DIR --openssl $OPENSSL_VER --system Linux
+      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
     - name: Add ccache to PATH
       run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
     - name: Configure ccache action
       uses: hendrikmuhs/ccache-action@v1.2
       with:
         save: false
     - name: Configure CPython
-      run: ./configure CFLAGS="-fdiagnostics-format=json" --config-cache --enable-slower-safety --with-pydebug --with-openssl=$OPENSSL_DIR
+      run: ./configure CFLAGS="-fdiagnostics-format=json" --config-cache --enable-slower-safety --with-pydebug --with-openssl="$OPENSSL_DIR"
     - name: Build CPython
       run: make -j4
     - name: Display build info
@@ -312,9 +312,9 @@ jobs:
       run: sudo ./.github/workflows/posix-deps-apt.sh
     - name: Configure OpenSSL env vars
       run: |
-        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> $GITHUB_ENV
-        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> $GITHUB_ENV
-        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> $GITHUB_ENV
+        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
+        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
+        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
     - name: 'Restore OpenSSL build'
       id: cache-openssl
       uses: actions/cache@v4
@@ -323,24 +323,24 @@ jobs:
         key: ${{ runner.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
     - name: Install OpenSSL
       if: steps.cache-openssl.outputs.cache-hit != 'true'
-      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory $MULTISSL_DIR --openssl $OPENSSL_VER --system Linux
+      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
     - name: Add ccache to PATH
       run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
     - name: Configure ccache action
       uses: hendrikmuhs/ccache-action@v1.2
       with:
         save: false
     - name: Setup directory envs for out-of-tree builds
       run: |
-        echo "CPYTHON_RO_SRCDIR=$(realpath -m ${GITHUB_WORKSPACE}/../cpython-ro-srcdir)" >> $GITHUB_ENV
-        echo "CPYTHON_BUILDDIR=$(realpath -m ${GITHUB_WORKSPACE}/../cpython-builddir)" >> $GITHUB_ENV
+        echo "CPYTHON_RO_SRCDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-ro-srcdir)" >> "$GITHUB_ENV"
+        echo "CPYTHON_BUILDDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-builddir)" >> "$GITHUB_ENV"
     - name: Create directories for read-only out-of-tree builds
-      run: mkdir -p $CPYTHON_RO_SRCDIR $CPYTHON_BUILDDIR
+      run: mkdir -p "$CPYTHON_RO_SRCDIR" "$CPYTHON_BUILDDIR"
     - name: Bind mount sources read-only
-      run: sudo mount --bind -o ro $GITHUB_WORKSPACE $CPYTHON_RO_SRCDIR
+      run: sudo mount --bind -o ro "$GITHUB_WORKSPACE" "$CPYTHON_RO_SRCDIR"
     - name: Runner image version
-      run: echo "IMAGE_VERSION=${ImageVersion}" >> $GITHUB_ENV
+      run: echo "IMAGE_VERSION=${ImageVersion}" >> "$GITHUB_ENV"
     - name: Restore config.cache
       uses: actions/cache@v4
       with:
@@ -353,7 +353,7 @@ jobs:
           --config-cache \
           --with-pydebug \
           --enable-slower-safety \
-          --with-openssl=$OPENSSL_DIR
+          --with-openssl="$OPENSSL_DIR"
     - name: Build CPython out-of-tree
       working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: make -j4
@@ -362,18 +362,18 @@ jobs:
       run: make pythoninfo
     - name: Remount sources writable for tests
       # some tests write to srcdir, lack of pyc files slows down testing
-      run: sudo mount $CPYTHON_RO_SRCDIR -oremount,rw
+      run: sudo mount "$CPYTHON_RO_SRCDIR" -oremount,rw
     - name: Setup directory envs for out-of-tree builds
       run: |
-        echo "CPYTHON_BUILDDIR=$(realpath -m ${GITHUB_WORKSPACE}/../cpython-builddir)" >> $GITHUB_ENV
+        echo "CPYTHON_BUILDDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-builddir)" >> "$GITHUB_ENV"
     - name: "Create hypothesis venv"
       working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: |
         VENV_LOC=$(realpath -m .)/hypovenv
         VENV_PYTHON=$VENV_LOC/bin/python
-        echo "HYPOVENV=${VENV_LOC}" >> $GITHUB_ENV
-        echo "VENV_PYTHON=${VENV_PYTHON}" >> $GITHUB_ENV
-        ./python -m venv $VENV_LOC && $VENV_PYTHON -m pip install -r ${GITHUB_WORKSPACE}/Tools/requirements-hypothesis.txt
+        echo "HYPOVENV=${VENV_LOC}" >> "$GITHUB_ENV"
+        echo "VENV_PYTHON=${VENV_PYTHON}" >> "$GITHUB_ENV"
+        ./python -m venv "$VENV_LOC" && "$VENV_PYTHON" -m pip install -r "${GITHUB_WORKSPACE}/Tools/requirements-hypothesis.txt"
     - name: 'Restore Hypothesis database'
       id: cache-hypothesis-database
       uses: actions/cache@v4
@@ -411,10 +411,13 @@ jobs:
 
   build_asan:
     name: 'Address sanitizer'
-    runs-on: ubuntu-22.04
+    runs-on: ${{ matrix.os }}
     timeout-minutes: 60
     needs: check_source
     if: needs.check_source.outputs.run_tests == 'true'
+    strategy:
+      matrix:
+        os: [ubuntu-22.04]
     env:
       OPENSSL_VER: 3.0.15
       PYTHONSTRICTEXTENSIONBUILD: 1
@@ -422,7 +425,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Runner image version
-      run: echo "IMAGE_VERSION=${ImageVersion}" >> $GITHUB_ENV
+      run: echo "IMAGE_VERSION=${ImageVersion}" >> "$GITHUB_ENV"
     - name: Restore config.cache
       uses: actions/cache@v4
       with:
@@ -438,9 +441,9 @@ jobs:
         version: 10
     - name: Configure OpenSSL env vars
       run: |
-        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> $GITHUB_ENV
-        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> $GITHUB_ENV
-        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> $GITHUB_ENV
+        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
+        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
+        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
     - name: 'Restore OpenSSL build'
       id: cache-openssl
       uses: actions/cache@v4
@@ -449,10 +452,10 @@ jobs:
         key: ${{ matrix.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
     - name: Install OpenSSL
       if: steps.cache-openssl.outputs.cache-hit != 'true'
-      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory $MULTISSL_DIR --openssl $OPENSSL_VER --system Linux
+      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
     - name: Add ccache to PATH
       run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
     - name: Configure ccache action
       uses: hendrikmuhs/ccache-action@v1.2
       with:
diff --git a/.github/workflows/reusable-change-detection.yml b/.github/workflows/reusable-change-detection.yml
index 5cd6fb39f1e12f..1a6fd33186840c 100644
--- a/.github/workflows/reusable-change-detection.yml
+++ b/.github/workflows/reusable-change-detection.yml
@@ -65,9 +65,9 @@ jobs:
       id: check
       run: |
         if [ -z "$GITHUB_BASE_REF" ]; then
-          echo "run-tests=true" >> $GITHUB_OUTPUT
+          echo "run-tests=true" >> "$GITHUB_OUTPUT"
         else
-          git fetch origin $GITHUB_BASE_REF --depth=1
+          git fetch origin "$GITHUB_BASE_REF" --depth=1
           # git diff "origin/$GITHUB_BASE_REF..." (3 dots) may be more
           # reliable than git diff "origin/$GITHUB_BASE_REF.." (2 dots),
           # but it requires to download more commits (this job uses
@@ -81,18 +81,18 @@ jobs:
           # into the PR branch anyway.
           #
           # https://github.com/python/core-workflow/issues/373
-          git diff --name-only origin/$GITHUB_BASE_REF.. | grep -qvE '(\.rst$|^Doc|^Misc|^\.pre-commit-config\.yaml$|\.ruff\.toml$|\.md$|mypy\.ini$)' && echo "run-tests=true" >> $GITHUB_OUTPUT || true
+          git diff --name-only "origin/$GITHUB_BASE_REF.." | grep -qvE '(\.rst$|^Doc|^Misc|^\.pre-commit-config\.yaml$|\.ruff\.toml$|\.md$|mypy\.ini$)' && echo "run-tests=true" >> "$GITHUB_OUTPUT" || true
         fi
 
         # Check if we should run hypothesis tests
         GIT_BRANCH=${GITHUB_BASE_REF:-${GITHUB_REF#refs/heads/}}
-        echo $GIT_BRANCH
+        echo "$GIT_BRANCH"
         if $(echo "$GIT_BRANCH" | grep -q -w '3\.\(8\|9\|10\|11\)'); then
           echo "Branch too old for hypothesis tests"
-          echo "run-hypothesis=false" >> $GITHUB_OUTPUT
+          echo "run-hypothesis=false" >> "$GITHUB_OUTPUT"
         else
           echo "Run hypothesis tests"
-          echo "run-hypothesis=true" >> $GITHUB_OUTPUT
+          echo "run-hypothesis=true" >> "$GITHUB_OUTPUT"
         fi
 
         # oss-fuzz maintains a configuration for fuzzing the main branch of
@@ -100,19 +100,19 @@ jobs:
         # merged into the main branch; compatibility with older branches may
         # be broken.
         FUZZ_RELEVANT_FILES='(\.c$|\.h$|\.cpp$|^configure$|^\.github/workflows/build\.yml$|^Modules/_xxtestfuzz)'
-        if [ "$GITHUB_BASE_REF" = "main" ] && [ "$(git diff --name-only origin/$GITHUB_BASE_REF.. | grep -qE $FUZZ_RELEVANT_FILES; echo $?)" -eq 0 ]; then
+        if [ "$GITHUB_BASE_REF" = "main" ] && [ "$(git diff --name-only "origin/$GITHUB_BASE_REF.." | grep -qE $FUZZ_RELEVANT_FILES; echo $?)" -eq 0 ]; then
           # The tests are pretty slow so they are executed only for PRs
           # changing relevant files.
           echo "Run CIFuzz tests"
-          echo "run-cifuzz=true" >> $GITHUB_OUTPUT
+          echo "run-cifuzz=true" >> "$GITHUB_OUTPUT"
         else
           echo "Branch too old for CIFuzz tests; or no C files were changed"
-          echo "run-cifuzz=false" >> $GITHUB_OUTPUT
+          echo "run-cifuzz=false" >> "$GITHUB_OUTPUT"
         fi
     - name: Compute hash for config cache key
       id: config-hash
       run: |
-        echo "hash=${{ hashFiles('configure', 'configure.ac', '.github/workflows/build.yml') }}" >> $GITHUB_OUTPUT
+        echo "hash=${{ hashFiles('configure', 'configure.ac', '.github/workflows/build.yml') }}" >> "$GITHUB_OUTPUT"
     - name: Get a list of the changed documentation-related files
       if: github.event_name == 'pull_request'
       id: changed-docs-files
diff --git a/.github/workflows/reusable-macos.yml b/.github/workflows/reusable-macos.yml
index b3a160fbbf8053..bfa5f69defb87c 100644
--- a/.github/workflows/reusable-macos.yml
+++ b/.github/workflows/reusable-macos.yml
@@ -30,7 +30,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Runner image version
-      run: echo "IMAGE_VERSION=${ImageVersion}" >> $GITHUB_ENV
+      run: echo "IMAGE_VERSION=${ImageVersion}" >> "$GITHUB_ENV"
     - name: Restore config.cache
       uses: actions/cache@v4
       with:
diff --git a/.github/workflows/reusable-tsan.yml b/.github/workflows/reusable-tsan.yml
index f4c976ca996410..65072efa8e9023 100644
--- a/.github/workflows/reusable-tsan.yml
+++ b/.github/workflows/reusable-tsan.yml
@@ -26,7 +26,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Runner image version
-      run: echo "IMAGE_VERSION=${ImageVersion}" >> $GITHUB_ENV
+      run: echo "IMAGE_VERSION=${ImageVersion}" >> "$GITHUB_ENV"
     - name: Restore config.cache
       uses: actions/cache@v4
       with:
@@ -47,12 +47,12 @@ jobs:
         sudo sysctl -w vm.mmap_rnd_bits=28
     - name: TSAN Option Setup
       run: |
-        echo "TSAN_OPTIONS=log_path=${GITHUB_WORKSPACE}/tsan_log suppressions=${GITHUB_WORKSPACE}/${{ inputs.suppressions_path }} handle_segv=0" >> $GITHUB_ENV
-        echo "CC=clang" >> $GITHUB_ENV
-        echo "CXX=clang++" >> $GITHUB_ENV
+        echo "TSAN_OPTIONS=log_path=${GITHUB_WORKSPACE}/tsan_log suppressions=${GITHUB_WORKSPACE}/${{ inputs.suppressions_path }} handle_segv=0" >> "$GITHUB_ENV"
+        echo "CC=clang" >> "$GITHUB_ENV"
+        echo "CXX=clang++" >> "$GITHUB_ENV"
     - name: Add ccache to PATH
       run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
     - name: Configure ccache action
       uses: hendrikmuhs/ccache-action@v1.2
       with:
@@ -68,7 +68,7 @@ jobs:
       run: ./python -m test --tsan -j4
     - name: Display TSAN logs
       if: always()
-      run: find ${GITHUB_WORKSPACE} -name 'tsan_log.*' | xargs head -n 1000
+      run: find "${GITHUB_WORKSPACE}" -name 'tsan_log.*' | xargs head -n 1000
     - name: Archive TSAN logs
       if: always()
       uses: actions/upload-artifact@v4
diff --git a/.github/workflows/reusable-ubuntu.yml b/.github/workflows/reusable-ubuntu.yml
index 0cf40ba8a9b03b..18e2e471e60e8d 100644
--- a/.github/workflows/reusable-ubuntu.yml
+++ b/.github/workflows/reusable-ubuntu.yml
@@ -34,9 +34,9 @@ jobs:
       run: sudo ./.github/workflows/posix-deps-apt.sh
     - name: Configure OpenSSL env vars
       run: |
-        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> $GITHUB_ENV
-        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> $GITHUB_ENV
-        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> $GITHUB_ENV
+        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
+        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
+        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
     - name: 'Restore OpenSSL build'
       id: cache-openssl
       uses: actions/cache@v4
@@ -45,10 +45,10 @@ jobs:
         key: ${{ matrix.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
     - name: Install OpenSSL
       if: steps.cache-openssl.outputs.cache-hit != 'true'
-      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory $MULTISSL_DIR --openssl $OPENSSL_VER --system Linux
+      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
     - name: Add ccache to PATH
       run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
     - name: Configure ccache action
       uses: hendrikmuhs/ccache-action@v1.2
       with:
@@ -56,14 +56,14 @@ jobs:
         max-size: "200M"
     - name: Setup directory envs for out-of-tree builds
       run: |
-        echo "CPYTHON_RO_SRCDIR=$(realpath -m ${GITHUB_WORKSPACE}/../cpython-ro-srcdir)" >> $GITHUB_ENV
-        echo "CPYTHON_BUILDDIR=$(realpath -m ${GITHUB_WORKSPACE}/../cpython-builddir)" >> $GITHUB_ENV
+        echo "CPYTHON_RO_SRCDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-ro-srcdir)" >> "$GITHUB_ENV"
+        echo "CPYTHON_BUILDDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-builddir)" >> "$GITHUB_ENV"
     - name: Create directories for read-only out-of-tree builds
-      run: mkdir -p $CPYTHON_RO_SRCDIR $CPYTHON_BUILDDIR
+      run: mkdir -p "$CPYTHON_RO_SRCDIR" "$CPYTHON_BUILDDIR"
     - name: Bind mount sources read-only
-      run: sudo mount --bind -o ro $GITHUB_WORKSPACE $CPYTHON_RO_SRCDIR
+      run: sudo mount --bind -o ro "$GITHUB_WORKSPACE" "$CPYTHON_RO_SRCDIR"
     - name: Runner image version
-      run: echo "IMAGE_VERSION=${ImageVersion}" >> $GITHUB_ENV
+      run: echo "IMAGE_VERSION=${ImageVersion}" >> "$GITHUB_ENV"
     - name: Restore config.cache
       uses: actions/cache@v4
       with:
@@ -77,7 +77,7 @@ jobs:
         --with-pydebug
         --enable-slower-safety
         --enable-safety
-        --with-openssl=$OPENSSL_DIR
+        --with-openssl="$OPENSSL_DIR"
         ${{ fromJSON(inputs.free-threading) && '--disable-gil' || '' }}
     - name: Build CPython out-of-tree
       if: ${{ inputs.free-threading }}
@@ -95,14 +95,14 @@ jobs:
       run: >-
         python Tools/build/check_warnings.py
         --compiler-output-file-path=${{ env.CPYTHON_BUILDDIR }}/compiler_output_ubuntu.txt
-        --warning-ignore-file-path ${GITHUB_WORKSPACE}/Tools/build/.warningignore_ubuntu
+        --warning-ignore-file-path "${GITHUB_WORKSPACE}/Tools/build/.warningignore_ubuntu"
         --compiler-output-type=gcc
         --fail-on-regression
         --fail-on-improvement
         --path-prefix="../cpython-ro-srcdir/"
     - name: Remount sources writable for tests
       # some tests write to srcdir, lack of pyc files slows down testing
-      run: sudo mount $CPYTHON_RO_SRCDIR -oremount,rw
+      run: sudo mount "$CPYTHON_RO_SRCDIR" -oremount,rw
     - name: Tests
       working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: xvfb-run make test
diff --git a/.github/workflows/reusable-wasi.yml b/.github/workflows/reusable-wasi.yml
index 4c8137c958a312..abc617a317cc0f 100644
--- a/.github/workflows/reusable-wasi.yml
+++ b/.github/workflows/reusable-wasi.yml
@@ -43,7 +43,7 @@ jobs:
         save: ${{ github.event_name == 'push' }}
         max-size: "200M"
     - name: "Add ccache to PATH"
-      run: echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+      run: echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
     - name: "Install Python"
       uses: actions/setup-python@v5
       with:
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 891934bc70a64f..f1db7886d8261c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.6.7
+    rev: v0.7.1
     hooks:
       - id: ruff
         name: Run Ruff (lint) on Doc/
@@ -24,7 +24,7 @@ repos:
         files: ^Doc/
 
   - repo: https://github.com/psf/black-pre-commit-mirror
-    rev: 24.8.0
+    rev: 24.10.0
     hooks:
       - id: black
         name: Run Black on Tools/build/check_warnings.py
@@ -37,7 +37,7 @@ repos:
         language_version: python3.12
 
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.6.0
+    rev: v5.0.0
     hooks:
       - id: check-case-conflict
       - id: check-merge-conflict
@@ -50,6 +50,21 @@ repos:
       - id: trailing-whitespace
         types_or: [c, inc, python, rst]
 
+  - repo: https://github.com/python-jsonschema/check-jsonschema
+    rev: 0.29.4
+    hooks:
+      - id: check-dependabot
+      - id: check-github-workflows
+
+  - repo: https://github.com/rhysd/actionlint
+    rev: v1.7.3
+    hooks:
+      - id: actionlint
+        args: [
+          -ignore=1st argument of function call is not assignable,
+          -ignore=SC2(015|038|086|091|097|098|129|155),
+        ]
+
   - repo: https://github.com/sphinx-contrib/sphinx-lint
     rev: v1.0.0
     hooks: