Validate and retry manifest fetch to prevent silent failures (#1332)

* validate and retry manifest fetch

* Refactor error handling in isRateLimitError function for improved clarity

.github/workflows/e2e-cache-freethreaded.yml

@@ -23,15 +23,18 @@ jobs:
       matrix:
         os:
           [
-            ubuntu-latest,
             ubuntu-22.04,
+            ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13.0t, 3.13.1t, 3.13.2t]
+        python-version: [3.13.14t, 3.14.6t]
+        exclude:
+          - os: windows-11-arm
+            python-version: 3.13.14t
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -50,15 +53,18 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13.1t, 3.13.2t, 3.13.5t]
+        python-version: [3.13.14t, 3.14.6t]
+        exclude:
+          - os: windows-11-arm
+            python-version: 3.13.14t
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -90,15 +96,15 @@ jobs:
       matrix:
         os:
           [
-            ubuntu-latest,
             ubuntu-22.04,
+            ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13.0, 3.13.1, 3.13.2]
+        python-version: [3.13.14, 3.14.6]
     steps:
       - uses: actions/checkout@v6
       - name: Install poetry
@@ -122,15 +128,18 @@ jobs:
       matrix:
         os:
           [
-            ubuntu-latest,
             ubuntu-22.04,
+            ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13.0t, 3.13.1t, 3.13.2t]
+        python-version: [3.13.14t, 3.14.6t]
+        exclude:
+          - os: windows-11-arm
+            python-version: 3.13.14t
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -150,15 +159,18 @@ jobs:
       matrix:
         os:
           [
-            ubuntu-latest,
             ubuntu-22.04,
+            ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13.1t, 3.13.2t, 3.13.5t]
+        python-version: [3.13.14t, 3.14.6t]
+        exclude:
+          - os: windows-11-arm
+            python-version: 3.13.14t
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -191,15 +203,18 @@ jobs:
       matrix:
         os:
           [
-            ubuntu-latest,
             ubuntu-22.04,
+            ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13.0t, 3.13.1t, 3.13.2t]
+        python-version: [3.13.14t, 3.14.6t]
+        exclude:
+          - os: windows-11-arm
+            python-version: 3.13.14t
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -219,15 +234,18 @@ jobs:
       matrix:
         os:
           [
-            ubuntu-latest,
             ubuntu-22.04,
+            ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13.0t, 3.13.1t, 3.13.2t]
+        python-version: [3.13.14t, 3.14.6t]
+        exclude:
+          - os: windows-11-arm
+            python-version: 3.13.14t
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -248,15 +266,18 @@ jobs:
       matrix:
         os:
           [
-            ubuntu-latest,
             ubuntu-22.04,
+            ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13.0t, 3.13.1t, 3.13.2t]
+        python-version: [3.13.14t, 3.14.6t]
+        exclude:
+          - os: windows-11-arm
+            python-version: 3.13.14t
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -274,15 +295,18 @@ jobs:
       matrix:
         os:
           [
-            ubuntu-latest,
             ubuntu-22.04,
+            ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13.0t, 3.13.1t, 3.13.2t]
+        python-version: [3.13.14t, 3.14.6t]
+        exclude:
+          - os: windows-11-arm
+            python-version: 3.13.14t
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python

.github/workflows/e2e-cache.yml

@@ -23,30 +23,23 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
         python-version:
-          [
+          ['3.10', '3.11', 'pypy-3.11-v7.x', '3.12', '3.13', '3.14']
-            '3.9',
-            'pypy-3.9-v7.x',
-            '3.10',
-            'pypy-3.10-v7.x',
-            '3.11',
-            'pypy-3.11-v7.x',
-            '3.12',
-            '3.13'
-          ]
         exclude:
           - os: windows-latest
             python-version: pypy-3.11-v7.x
-          - os: macos-latest
+          - os: windows-11-arm
-            python-version: pypy-3.9-v7.x
+            python-version: pypy-3.11-v7.x
+          - os: windows-11-arm
+            python-version: '3.10'
 
     steps:
       - uses: actions/checkout@v6
@@ -66,27 +59,22 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version:
+        python-version: ['3.11', 'pypy-3.11-v7.x', '3.12', '3.13', '3.14']
-          ['3.10', 'pypy-3.10-v7.x', '3.11', 'pypy-3.11-v7.x', '3.12', '3.13']
         exclude:
           - os: windows-latest
             python-version: pypy-3.11-v7.x
           - os: ubuntu-22.04
             python-version: pypy-3.11-v7.x
-          - os: ubuntu-22.04-arm
+          - os: windows-11-arm
-            python-version: pypy-3.10-v7.x
-          - os: ubuntu-22.04-arm
             python-version: pypy-3.11-v7.x
-          - os: ubuntu-22.04-arm
-            python-version: pypy-3.10-v7.x
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -123,25 +111,25 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
         python-version:
-          [
+          ['3.10', '3.11', 'pypy-3.11-v7.x', '3.12', '3.13', '3.14']
-            '3.9',
+        exclude:
-            'pypy-3.9-v7.x',
+          - os: windows-latest
-            '3.10',
+            python-version: pypy-3.11-v7.x
-            'pypy-3.10-v7.x',
+          - os: ubuntu-22.04
-            '3.11',
+            python-version: pypy-3.11-v7.x
-            'pypy-3.11-v7.x',
+          - os: windows-11-arm
-            '3.12',
+            python-version: pypy-3.11-v7.x
-            '3.13'
+          - os: windows-11-arm
-          ]
+            python-version: '3.10'
     steps:
       - uses: actions/checkout@v6
       - name: Install poetry
@@ -169,30 +157,23 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
         python-version:
-          [
+          ['3.10', '3.11', 'pypy-3.11-v7.x', '3.12', '3.13', '3.14']
-            '3.9',
-            'pypy-3.9-v7.x',
-            '3.10',
-            'pypy-3.10-v7.x',
-            '3.11',
-            'pypy-3.11-v7.x',
-            '3.12',
-            '3.13'
-          ]
         exclude:
           - os: windows-latest
             python-version: pypy-3.11-v7.x
-          - os: macos-latest
+          - os: windows-11-arm
-            python-version: pypy-3.9-v7.x
+            python-version: pypy-3.11-v7.x
+          - os: windows-11-arm
+            python-version: '3.10'
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -212,24 +193,21 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version:
+        python-version: ['3.11', 'pypy-3.11-v7.x', '3.12', '3.13', '3.14']
-          ['3.10', 'pypy-3.10-v7.x', '3.11', 'pypy-3.11-v7.x', '3.12', '3.13']
         exclude:
           - os: windows-latest
             python-version: pypy-3.11-v7.x
           - os: ubuntu-22.04
             python-version: pypy-3.11-v7.x
-          - os: ubuntu-22.04-arm
+          - os: windows-11-arm
-            python-version: pypy-3.10-v7.x
-          - os: ubuntu-22.04-arm
             python-version: pypy-3.11-v7.x
     steps:
       - uses: actions/checkout@v6
@@ -268,15 +246,18 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+        exclude:
+          - os: windows-11-arm
+            python-version: '3.10'
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -296,15 +277,18 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+        exclude:
+          - os: windows-11-arm
+            python-version: '3.10'
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -325,15 +309,18 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+        exclude:
+          - os: windows-11-arm
+            python-version: '3.10'
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python
@@ -351,15 +338,18 @@ jobs:
       matrix:
         os:
           [
+            ubuntu-22.04,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            ubuntu-22.04,
-            ubuntu-22.04-arm,
             windows-latest,
-            macos-latest,
+            windows-11-arm,
-            macos-15-intel
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+        exclude:
+          - os: windows-11-arm
+            python-version: '3.10'
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python

.github/workflows/e2e-tests.yml

@@ -19,30 +19,25 @@ jobs:
       matrix:
         operating-system:
           [
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
             ubuntu-latest,
             ubuntu-24.04-arm,
-            macos-latest,
+            windows-latest,
-            macos-15-intel
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
 
-      - name: Run with setup-python 3.9.13
-        uses: ./
-        with:
-          python-version: 3.9.13
-      - name: Verify 3.9.13
-        run: python __tests__/verify-python.py 3.9.13
-
       - name: Run with setup-python 3.10.11
+        if: matrix.operating-system != 'windows-11-arm'
         uses: ./
         with:
           python-version: 3.10.11
       - name: Verify 3.10.11
+        if: matrix.operating-system != 'windows-11-arm'
         run: python __tests__/verify-python.py 3.10.11
 
       - name: Run with setup-python 3.11.9
@@ -52,51 +47,58 @@ jobs:
       - name: Verify 3.11.9
         run: python __tests__/verify-python.py 3.11.9
 
-      - name: Run with setup-python 3.12.7
+      - name: Run with setup-python 3.12.10
         uses: ./
         with:
-          python-version: 3.12.7
+          python-version: 3.12.10
-      - name: Verify 3.12.7
+      - name: Verify 3.12.10
-        run: python __tests__/verify-python.py 3.12.7
+        run: python __tests__/verify-python.py 3.12.10
 
-      - name: Run with setup-python 3.13.0
+      - name: Run with setup-python 3.13.14
         uses: ./
         with:
-          python-version: 3.13.0
+          python-version: 3.13.14
-      - name: Verify 3.13.0
+      - name: Verify 3.13.14
-        run: python __tests__/verify-python.py 3.13.0
+        run: python __tests__/verify-python.py 3.13.14
 
-      - name: Run with setup-python 3.13
+      - name: Run with setup-python 3.14.6
-        id: cp313
         uses: ./
         with:
-          python-version: '3.13'
+          python-version: 3.14.6
-      - name: Verify 3.13
+      - name: Verify 3.14.6
-        run: python __tests__/verify-python.py 3.13
+        run: python __tests__/verify-python.py 3.14.6
+
+      - name: Run with setup-python 3.14
+        id: cp314
+        uses: ./
+        with:
+          python-version: '3.14'
+      - name: Verify 3.14
+        run: python __tests__/verify-python.py 3.14
 
       - name: Install pipx (Windows)
-        if: runner. os == 'Windows'
+        if: runner.os == 'Windows'
         run: python -m pip install pipx
 
-      - name: Run python-path sample 3.13
+      - name: Run python-path sample 3.14
-        run: pipx run --python '${{ steps.cp313.outputs.python-path }}' nox --version
+        run: pipx run --python '${{ steps.cp314.outputs.python-path }}' nox --version
         env:
           PIPX_HOME: '${{ runner.temp }}/pipx'
           PIPX_BIN_DIR: '${{ runner.temp }}/pipx/bin'
 
-      - name: Run with setup-python ==3.13
+      - name: Run with setup-python ==3.14
         uses: ./
         with:
-          python-version: '==3.13'
+          python-version: '==3.14'
-      - name: Verify ==3.13
+      - name: Verify ==3.14
-        run: python __tests__/verify-python.py 3.13
+        run: python __tests__/verify-python.py 3.14
 
-      - name: Run with setup-python <3.13
+      - name: Run with setup-python <3.14
         uses: ./
         with:
-          python-version: '<3.13'
+          python-version: '<3.14'
-      - name: Verify <3.13
+      - name: Verify <3.14
-        run: python __tests__/verify-python.py 3.12
+        run: python __tests__/verify-python.py 3.13
 
       - name: Test Raw Endpoint Access
         run: |

.github/workflows/test-graalpy.yml

@@ -28,10 +28,9 @@ jobs:
             macos-15-intel
           ]
         graalpy:
-          - 'graalpy-22.3'
-          - 'graalpy-23.0'
           - 'graalpy-23.1'
-          - 'graalpy-24.1'
+          - 'graalpy-24.2'
+          - 'graalpy-25.0'
 
     steps:
       - name: Checkout
@@ -82,7 +81,7 @@ jobs:
             ubuntu-latest,
             macos-15-intel
           ]
-        graalpy: ['graalpy22.3', 'graalpy23.0', 'graalpy23.1', 'graalpy24.1']
+        graalpy: ['graalpy23.1', 'graalpy24.2', 'graalpy25.0']
 
     steps:
       - name: Checkout
@@ -113,7 +112,7 @@ jobs:
         uses: ./
         id: graalpy
         with:
-          python-version: 'graalpy-24.x'
+          python-version: 'graalpy-25.x'
           check-latest: true
       - name: GraalPy and Python version
         run: python --version

.github/workflows/test-pypy.yml

@@ -22,27 +22,20 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            macos-15-intel,
+            macos-latest
           ]
         pypy:
-          - 'pypy-2.7'
+          - 'pypy-3.11'
-          - 'pypy-3.10'
+          - 'pypy-3.11-v7.3.23'
-          - 'pypy3.9'
+          - 'pypy-3.11-v7.3.x'
-          - 'pypy-2.7-v7.3.17'
+          - 'pypy-3.11-v7.x'
-          - 'pypy-3.10-v7.3.17'
-          - 'pypy-3.10-v7.3.16'
-          - 'pypy-3.10-v7.3.x'
-          - 'pypy-3.10-v7.x'
-          - 'pypy-2.7-v7.3.12rc1'
           - 'pypy-3.11-nightly'
-          - 'pypy3.10-v7.3.17'
+          - 'pypy3.11-v7.3.23'
-          - 'pypy3.11-v7.3.19'
 
     steps:
       - name: Checkout
@@ -85,16 +78,15 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - macos-15-intel
+          [
-          - macos-14
+            ubuntu-22.04,
-          - macos-15
+            ubuntu-latest,
-          - windows-2022
+            ubuntu-24.04-arm,
-          - windows-2025
+            windows-latest,
-          - ubuntu-22.04
+            macos-15-intel,
-          - ubuntu-24.04
+            macos-latest
-          - ubuntu-22.04-arm
+          ]
-          - ubuntu-24.04-arm
+        pypy: ['pypy-3.11']
-        pypy: ['pypy-2.7', 'pypy-3.10', 'pypy-3.11']
 
     steps:
       - name: Checkout
@@ -138,15 +130,14 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            macos-15-intel,
+            macos-latest
           ]
-        pypy: ['pypy2.7', 'pypy3.9', 'pypy3.11-nightly', 'pypy3.11']
+        pypy: ['pypy3.11-nightly', 'pypy3.11']
 
     steps:
       - name: Checkout
@@ -172,13 +163,12 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - uses: actions/checkout@v6
@@ -214,13 +204,12 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - uses: actions/checkout@v6
@@ -230,7 +219,6 @@ jobs:
           python-version: |
             pypy-3.11-v7.3.x
             pypy-3.10-v7.3.x
-            pypy3.9
           check-latest: true
       - name: PyPy and Python version
         run: python --version
@@ -248,13 +236,13 @@ jobs:
         run: |
           EXECUTABLE="pypy-3.11-v7.3.x"
           EXECUTABLE=${EXECUTABLE/-/}  # remove the first '-' in "pypy-X.Y" -> "pypyX.Y" to match executable name
-          EXECUTABLE=${EXECUTABLE%%-*}  # remove any -* suffixe
+          EXECUTABLE=${EXECUTABLE%%-*}  # remove any -* suffix
           ${EXECUTABLE} --version
         shell: bash
       - name: Assert expected binaries (or symlinks) are present
         run: |
-          EXECUTABLE='pypy3.9'
+          EXECUTABLE='pypy-3.10-v7.3.x'
           EXECUTABLE=${EXECUTABLE/pypy-/pypy}  # remove the first '-' in "pypy-X.Y" -> "pypyX.Y" to match executable name
-          EXECUTABLE=${EXECUTABLE%%-*}  # remove any -* suffixe
+          EXECUTABLE=${EXECUTABLE%%-*}  # remove any -* suffix
           ${EXECUTABLE} --version
         shell: bash

.github/workflows/test-python-freethreaded.yml

@@ -22,15 +22,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13.0t, 3.13.1t, 3.13.2t]
+        python: [3.13.14t, 3.14.6t]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -59,15 +59,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13.0t, 3.13.1t, 3.13.2t]
+        python: [3.13.14t, 3.14.6t]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -99,15 +99,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13.0t, 3.13.1t, 3.13.2t]
+        python: [3.13.14t, 3.14.6t]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -137,15 +137,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13.0, 3.13.1, 3.13.2]
+        python: [3.13.14, 3.14.6]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -178,15 +178,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13.0, 3.13.1, 3.13.2]
+        python: [3.13.14, 3.14.6]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -219,15 +219,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13.0t, 3.13.1t, 3.13.2t, 3.14t-dev]
+        python: [3.13.14t, 3.14.6t, 3.15t-dev]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -250,15 +250,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13t, 3.14t-dev]
+        python: [3.13t, 3.15t-dev]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -290,15 +290,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13.0t, 3.13.1t, 3.13.2t, 3.14t-dev]
+        python: [3.13.14t, 3.14.6t, 3.15t-dev]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -323,30 +323,30 @@ jobs:
         run: python -c 'import math; print(math.factorial(5))'
 
   setup-pre-release-version-from-manifest:
-    name: Setup 3.14.0-alpha.6 ${{ matrix.os }}
+    name: Setup 3.15.0-beta.3 ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
 
-      - name: setup-python 3.14.0-alpha.6
+      - name: setup-python 3.15.0-beta.3
         id: setup-python
         uses: ./
         with:
-          python-version: '3.14.0-alpha.6'
+          python-version: '3.15.0-beta.3'
           freethreaded: true
 
       - name: Check python-path
@@ -360,67 +360,67 @@ jobs:
         run: python -c 'import math; print(math.factorial(5))'
 
   setup-dev-version:
-    name: Setup 3.14t-dev ${{ matrix.os }}
+    name: Setup 3.15t-dev ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
 
-      - name: setup-python 3.14t-dev
+      - name: setup-python 3.15t-dev
         id: setup-python
         uses: ./
         with:
-          python-version: '3.14t-dev'
+          python-version: '3.15t-dev'
 
       - name: Check python-path
         run: ./__tests__/check-python-path.sh '${{ steps.setup-python.outputs.python-path }}'
         shell: bash
 
       - name: Validate version
-        run: ${{ startsWith(steps.setup-python.outputs.python-version, '3.14.') }}
+        run: ${{ startsWith(steps.setup-python.outputs.python-version, '3.15.') }}
         shell: bash
 
       - name: Run simple code
         run: python -c 'import math; print(math.factorial(5))'
 
   setup-prerelease-version:
-    name: Setup 3.14t ${{ matrix.os }}
+    name: Setup 3.15t ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
 
-      - name: setup-python 3.14t
+      - name: setup-python 3.15t
         id: setup-python
         uses: ./
         with:
-          python-version: '3.14t'
+          python-version: '3.15t'
           allow-prereleases: true
 
       - name: Check python-path
@@ -428,7 +428,7 @@ jobs:
         shell: bash
 
       - name: Validate version
-        run: ${{ startsWith(steps.setup-python.outputs.python-version, '3.14.') }}
+        run: ${{ startsWith(steps.setup-python.outputs.python-version, '3.15.') }}
         shell: bash
 
       - name: Run simple code
@@ -442,15 +442,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13.0t, 3.13.1t, 3.13.2t]
+        python: [3.13.14t, 3.14.6t]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -475,15 +475,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: [3.13t, 3.14t-dev]
+        python-version: [3.13t, 3.15t-dev]
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python and check latest
@@ -502,24 +502,24 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - uses: actions/checkout@v6
-      - name: Setup Python and check latest
+      - name: Setup multiple Python versions
         id: setup-python
         uses: ./
         with:
           python-version: |
-            3.13.1t
+            3.13.14t
-            3.13.2t
+            3.14.6t
-            3.14t-dev
+            3.15t-dev
       - name: Verify Python version
         run: ${{ steps.setup-python.outputs.python-path }} -VVV
 
@@ -531,15 +531,15 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.13.1, 3.13.2, 3.14-dev, 3.14.0-alpha.6]
+        python: [3.13.14, 3.14.6, 3.15-dev, 3.15.0-beta.3]
     steps:
       - name: Checkout
         uses: actions/checkout@v6

.github/workflows/test-python.yml

@@ -22,15 +22,18 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.9.13, 3.10.11, 3.11.9, 3.12.3, 3.13.2]
+        python: [3.10.11, 3.11.9, 3.12.10, 3.13.14, 3.14.6]
+        exclude:
+          - os: windows-11-arm
+            python: 3.10.11
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -66,15 +69,18 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.9.13, 3.10.11, 3.11.9, 3.12.3, 3.13.2]
+        python: [3.10.11, 3.11.9, 3.12.10, 3.13.14, 3.14.6]
+        exclude:
+          - os: windows-11-arm
+            python: 3.10.11
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -113,15 +119,18 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.9.13, 3.10.11, 3.11.9, 3.12.3, 3.13.2]
+        python: [3.10.11, 3.11.9, 3.12.10, 3.13.14, 3.14.6]
+        exclude:
+          - os: windows-11-arm
+            python: 3.10.11
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -158,15 +167,18 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.9.13, 3.10.11, 3.11.9, '==3.12.3', 3.13.2]
+        python: [3.10.11, 3.11.9, '==3.12.10', 3.13.14, 3.14.6]
+        exclude:
+          - os: windows-11-arm
+            python: 3.10.11
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -208,15 +220,18 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.9.13, 3.10.11, 3.11.9, 3.12.3, 3.13.2]
+        python: [3.10.11, 3.11.9, 3.12.10, 3.13.14, 3.14.6]
+        exclude:
+          - os: windows-11-arm
+            python: 3.10.11
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -258,18 +273,22 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [pypy3.11-7.3.18, graalpy-24.1.2, 3.13.2, 3.14-dev]
+        python: [pypy3.11-7.3.18, graalpy-24.1.2, 3.13.14, 3.15-dev]
         exclude:
           - os: windows-latest
             python: graalpy-24.1.2
+          - os: windows-11-arm
+            python: graalpy-24.1.2
+          - os: windows-11-arm
+            python: pypy3.11-7.3.18
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -292,15 +311,18 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.9.13, 3.10.11, 3.11.9, 3.13.2]
+        python: [3.10.11, 3.11.9, 3.13.14, 3.14.6]
+        exclude:
+          - os: windows-11-arm
+            python: 3.10.11
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -342,15 +364,18 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: [3.9.13, 3.10.11, 3.11.9, 3.13.2]
+        python: [3.10.11, 3.11.9, 3.13.14, 3.14.6]
+        exclude:
+          - os: windows-11-arm
+            python: 3.10.11
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -385,30 +410,30 @@ jobs:
         run: python -c 'import math; print(math.factorial(5))'
 
   setup-pre-release-version-from-manifest:
-    name: Setup 3.14.0-alpha.6 ${{ matrix.os }}
+    name: Setup 3.15.0-beta.3 ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
 
-      - name: setup-python 3.14.0-alpha.6
+      - name: setup-python 3.15.0-beta.3
         id: setup-python
         uses: ./
         with:
-          python-version: '3.14.0-alpha.6'
+          python-version: '3.15.0-beta.3'
 
       - name: Check python-path
         run: ./__tests__/check-python-path.sh '${{ steps.setup-python.outputs.python-path }}'
@@ -417,8 +442,8 @@ jobs:
       - name: Validate version
         run: |
           $pythonVersion = (python --version)
-          if ("Python 3.14.0a6" -ne "$pythonVersion"){
+          if ("Python 3.15.0b3" -ne "$pythonVersion"){
-            Write-Host "The current version is $pythonVersion; expected version is 3.14.0a6"
+            Write-Host "The current version is $pythonVersion; expected version is 3.15.0b3"
             exit 1
           }
           $pythonVersion
@@ -428,67 +453,67 @@ jobs:
         run: python -c 'import math; print(math.factorial(5))'
 
   setup-dev-version:
-    name: Setup 3.14-dev ${{ matrix.os }}
+    name: Setup 3.15-dev ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
 
-      - name: setup-python 3.14-dev
+      - name: setup-python 3.15-dev
         id: setup-python
         uses: ./
         with:
-          python-version: '3.14-dev'
+          python-version: '3.15-dev'
 
       - name: Check python-path
         run: ./__tests__/check-python-path.sh '${{ steps.setup-python.outputs.python-path }}'
         shell: bash
 
       - name: Validate version
-        run: ${{ startsWith(steps.setup-python.outputs.python-version, '3.14.') }}
+        run: ${{ startsWith(steps.setup-python.outputs.python-version, '3.15.') }}
         shell: bash
 
       - name: Run simple code
         run: python -c 'import math; print(math.factorial(5))'
 
   setup-prerelease-version:
-    name: Setup 3.14 ${{ matrix.os }}
+    name: Setup 3.15 ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - name: Checkout
         uses: actions/checkout@v6
 
-      - name: setup-python 3.14
+      - name: setup-python 3.15
         id: setup-python
         uses: ./
         with:
-          python-version: '3.14'
+          python-version: '3.15'
           allow-prereleases: true
 
       - name: Check python-path
@@ -496,7 +521,7 @@ jobs:
         shell: bash
 
       - name: Validate version
-        run: ${{ startsWith(steps.setup-python.outputs.python-version, '3.14.') }}
+        run: ${{ startsWith(steps.setup-python.outputs.python-version, '3.15.') }}
         shell: bash
 
       - name: Run simple code
@@ -510,15 +535,18 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            macos-15-intel,
             ubuntu-latest,
-            ubuntu-24.04-arm
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python: ['3.10', '3.11', '3.12', '3.13', '3.14']
+        exclude:
+          - os: windows-11-arm
+            python: '3.10'
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -543,15 +571,18 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+        exclude:
+          - os: windows-11-arm
+            python-version: '3.10'
     steps:
       - uses: actions/checkout@v6
       - name: Setup Python and check latest
@@ -576,13 +607,13 @@ jobs:
       matrix:
         os:
           [
-            macos-latest,
-            windows-latest,
             ubuntu-22.04,
-            ubuntu-22.04-arm,
-            ubuntu-24.04-arm,
             ubuntu-latest,
-            macos-15-intel
+            ubuntu-24.04-arm,
+            windows-latest,
+            windows-11-arm,
+            macos-15-intel,
+            macos-latest
           ]
     steps:
       - uses: actions/checkout@v6
@@ -590,17 +621,16 @@ jobs:
         uses: ./
         with:
           python-version: |
-            3.9
-            3.10
             3.11
             3.12
             3.13
+            3.14
           check-latest: true
       - name: Validate version
         run: |
           $pythonVersion = (python --version)
-          if ("$pythonVersion" -NotMatch "3.13"){
+          if ("$pythonVersion" -NotMatch "3.14"){
-            Write-Host "The current version is $pythonVersion; expected version is 3.13"
+            Write-Host "The current version is $pythonVersion; expected version is 3.14"
             exit 1
           }
           $pythonVersion

__tests__/data/Pipfile

@@ -5,7 +5,7 @@ name = "pypi"
 
 [packages]
 flake8 = "==6.0.0"
-numpy = "==2.2.4"
+numpy = "==2.4.6"
 
 [dev-packages]
 

__tests__/data/Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "9d0bc7ff1f9078396b19f05bc5cd57894f3783c68f96fa9d623b1ea5a1b168f5"
+            "sha256": "0060d5c4915f1f35aae1f3e9fa6de3f65d1a851e6e33ac57a04665d5d1c796fa"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -35,65 +35,82 @@
         },
         "numpy": {
             "hashes": [
-                "sha256:05c076d531e9998e7e694c36e8b349969c56eadd2cdcd07242958489d79a7286",
+                "sha256:001fbb8e08d942dd57599e781f2472269ee7f2755fae407b4f67b2f0b17da3f1",
-                "sha256:0d54974f9cf14acf49c60f0f7f4084b6579d24d439453d5fc5805d46a165b542",
+                "sha256:0280e0356c0829a18d9de1cb7eee50ec22ca639878d7240307ca0943d73cd2c4",
-                "sha256:11c43995255eb4127115956495f43e9343736edb7fcdb0d973defd9de14cd84f",
+                "sha256:043191bfa8eab18c776647b62723ac9dddece59743b13f49b2016094129c2b3f",
-                "sha256:188dcbca89834cc2e14eb2f106c96d6d46f200fe0200310fc29089657379c58d",
+                "sha256:06ca2f61ec4385a07a6977c55ba998a4466c123642b4a32694d3128fce18c079",
-                "sha256:1974afec0b479e50438fc3648974268f972e2d908ddb6d7fb634598cdb8260a0",
+                "sha256:0a041d3d761dc3c35cc56ce0351506a02bcbc25f7b169f652435141a17db9096",
-                "sha256:1cf4e5c6a278d620dee9ddeb487dc6a860f9b199eadeecc567f777daace1e9e7",
+                "sha256:0ab0a9c4ffb1a6d95ef519fe4247dba8eb6b18ad93999f76b7f657039acabd47",
-                "sha256:207a2b8441cc8b6a2a78c9ddc64d00d20c303d79fba08c577752f080c4007ee3",
+                "sha256:0c9136e14ed34a9e343a31c533d78a9813a69a3148332bce5e9821cb2f996e66",
-                "sha256:218f061d2faa73621fa23d6359442b0fc658d5b9a70801373625d958259eaca3",
+                "sha256:110f8b71aacb688ec69062bb7f6938a0f8acb01b7c1c4beb453c65b6d234584d",
-                "sha256:2aad3c17ed2ff455b8eaafe06bcdae0062a1db77cb99f4b9cbb5f4ecb13c5146",
+                "sha256:112b06a867b235ef466ed3508ddf0238050df9c727cafb5301ac385b899189a1",
-                "sha256:2fa8fa7697ad1646b5c93de1719965844e004fcad23c91228aca1cf0800044a1",
+                "sha256:17f9ade344e7d9b464a084d69bcf18fc691cb1db67c62ed80820bf4926d78f0e",
-                "sha256:31504f970f563d99f71a3512d0c01a645b692b12a63630d6aafa0939e52361e6",
+                "sha256:1e254a00cdf42b1e4d5b3d68d33af63268d41340d8885df2ab6470f2e1500147",
-                "sha256:3387dd7232804b341165cedcb90694565a6015433ee076c6754775e85d86f1fc",
+                "sha256:1e978ec1e8bd0e0e4de6bb75de9d30cbb74db6b6a2bb727618613703ca0167dd",
-                "sha256:4ba5054787e89c59c593a4169830ab362ac2bee8a969249dc56e5d7d20ff8df9",
+                "sha256:25c692919ac5a01f170a3bfcd62d745b24fd095c353d50812637d6fcab442e75",
-                "sha256:4f92084defa704deadd4e0a5ab1dc52d8ac9e8a8ef617f3fbb853e79b0ea3592",
+                "sha256:260a5d70215b61ab4fadf5c7baacd64821842975eea312125ed3c39a6391b063",
-                "sha256:65ef3468b53269eb5fdb3a5c09508c032b793da03251d5f8722b1194f1790c00",
+                "sha256:2803abfebfc990042cd494d8ce2d5f82e9d847af6d35ec486923aa19dbad5e73",
-                "sha256:6f527d8fdb0286fd2fd97a2a96c6be17ba4232da346931d967a0630050dfd298",
+                "sha256:29a287e0cf63ff528da061de6b9f64a4618da591ca1046aafc54062e40ca7eab",
-                "sha256:7051ee569db5fbac144335e0f3b9c2337e0c8d5c9fee015f259a5bd70772b7e8",
+                "sha256:29cb7f67d10b479ff07c17d33e39f78c07f71c40ef30d63c153d340e96cd3fb4",
-                "sha256:7716e4a9b7af82c06a2543c53ca476fa0b57e4d760481273e09da04b74ee6ee2",
+                "sha256:3213d622a0283a39a93d188f3cf72b26862df52fbb4ca3697f51705016523d41",
-                "sha256:79bd5f0a02aa16808fcbc79a9a376a147cc1045f7dfe44c6e7d53fa8b8a79392",
+                "sha256:33111801a01c12a8a1e3721f0a9232f8cfc8ae2c6b7098167e6f623c6073f402",
-                "sha256:7a4e84a6283b36632e2a5b56e121961f6542ab886bc9e12f8f9818b3c266bfbb",
+                "sha256:357cc07a6d7b0b182ff02249616a03742827ebb1277546b5c7cd7f7620a45698",
-                "sha256:8120575cb4882318c791f839a4fd66161a6fa46f3f0a5e613071aae35b5dd8f8",
+                "sha256:38efbc8de75c7a0fc1ac190162d892787f3f47b57cc291231aafee36b80982b7",
-                "sha256:81413336ef121a6ba746892fad881a83351ee3e1e4011f52e97fba79233611fd",
+                "sha256:4081eb135ac24158bd51cdfbef16f1c64df7063b1143f24731387137c092bec8",
-                "sha256:8146f3550d627252269ac42ae660281d673eb6f8b32f113538e0cc2a9aed42b9",
+                "sha256:40fdc1ae7125e518ea98e53e69a4ebc27e1fd50510c47b7ea130cf21e5e1d42b",
-                "sha256:879cf3a9a2b53a4672a168c21375166171bc3932b7e21f622201811c43cdd3b0",
+                "sha256:4cfe66903cc32a9921a6733d96b19bb6abf310397581bbad89c228f5abaf0ee8",
-                "sha256:892c10d6a73e0f14935c31229e03325a7b3093fafd6ce0af704be7f894d95687",
+                "sha256:511dbaf848decaaaf4b4ca48032619fb3138710c4bf7da7617765edad1ef96b0",
-                "sha256:92bda934a791c01d6d9d8e038363c50918ef7c40601552a58ac84c9613a665bc",
+                "sha256:55cced7c52e981362f708ad635198e97a752dfba412cc03c23bbf3bd8d5cd662",
-                "sha256:9ba03692a45d3eef66559efe1d1096c4b9b75c0986b5dff5530c378fb8331d4f",
+                "sha256:56b39e5e0622a09a25bf5baf62f4bcf0cb8a41ae6e2819cf49bbc5a74c083f91",
-                "sha256:9eeea959168ea555e556b8188da5fa7831e21d91ce031e95ce23747b7609f8a4",
+                "sha256:5dbbdb29840ca3d91ee0fece42fc29278886d908280bfec0a5846c6f901a3eb0",
-                "sha256:a0258ad1f44f138b791327961caedffbf9612bfa504ab9597157806faa95194a",
+                "sha256:5f9fb9157b4ce2971008323afe46053787b526ef624fea915b261468a8421a0f",
-                "sha256:a761ba0fa886a7bb33c6c8f6f20213735cb19642c580a931c625ee377ee8bd39",
+                "sha256:6180d8b35af935aed8ece3a85e0a43f87393ae0ac87c8d2c8bd2c993f7270ef3",
-                "sha256:a7b9084668aa0f64e64bd00d27ba5146ef1c3a8835f3bd912e7a9e01326804c4",
+                "sha256:68a5124b13fa6cc2086764a20005d30bc0548146f7f5322f02fce212ca14317f",
-                "sha256:a84eda42bd12edc36eb5b53bbcc9b406820d3353f1994b6cfe453a33ff101775",
+                "sha256:68bb27509ac1b9a3443094260f6326150663b06abe40b73a2f81160623da5b67",
-                "sha256:ab2939cd5bec30a7430cbdb2287b63151b77cf9624de0532d629c9a1c59b1d5c",
+                "sha256:6f41ae150c4e32db4f3310cdaf64b1593a03dbabe29eec77fc9b50fe64061df6",
-                "sha256:ac0280f1ba4a4bfff363a99a6aceed4f8e123f8a9b234c89140f5e894e452ecd",
+                "sha256:7265a2f3d436e54ef9f2b52b5c937e6be778781bd97a590319d7348f1c1ca997",
-                "sha256:adf8c1d66f432ce577d0197dceaac2ac00c0759f573f28516246351c58a85020",
+                "sha256:72fbe16c6fac95aedf5937fa873445cec2110be35d8a4e9433d7501fd98dae6b",
-                "sha256:b4adfbbc64014976d2f91084915ca4e626fbf2057fb81af209c1a6d776d23e3d",
+                "sha256:7d92c3819208a60205a12a245c91ad70cb0a85336659b19b834205573ac8456e",
-                "sha256:bb649f8b207ab07caebba230d851b579a3c8711a851d29efe15008e31bb4de24",
+                "sha256:8155154c7c691289fe18f510b5d4657c68c67989f293f0535a91360392ff6538",
-                "sha256:bce43e386c16898b91e162e5baaad90c4b06f9dcbe36282490032cec98dc8ae7",
+                "sha256:81a1cca95ed5bb92aa8b10dd2cdc9a0d3853a50fad926c28b5d7e8ea54389627",
-                "sha256:bd3ad3b0a40e713fc68f99ecfd07124195333f1e689387c180813f0e94309d6f",
+                "sha256:89cd468399cfd2504718f0ba50e410dca55a170b61a02ad92bb18c8a65186e93",
-                "sha256:c3f7ac96b16955634e223b579a3e5798df59007ca43e8d451a0e6a50f6bfdfba",
+                "sha256:8ad03c0965fb3c692200e74d458ca28c1dbb4ce96f9a479a8aa041ad5fabca02",
-                "sha256:cf28633d64294969c019c6df4ff37f5698e8326db68cc2b66576a51fad634880",
+                "sha256:90f9849678c75fe7afa2d348ac842c168b0a4d3d61919687216dfc547976d853",
-                "sha256:d0f35b19894a9e08639fd60a1ec1978cb7f5f7f1eace62f38dd36be8aecdef4d",
+                "sha256:948424b06129ce883307e8cff868c31396d8dc7630a59c61d70d98dbe70f222c",
-                "sha256:db1f1c22173ac1c58db249ae48aa7ead29f534b9a948bc56828337aa84a32ed6",
+                "sha256:9cd5ffd25db4e7ba6a375693b3fc0fc1791ec636c17db3720da19bde7180ec43",
-                "sha256:dbe512c511956b893d2dacd007d955a3f03d555ae05cfa3ff1c1ff6df8851854",
+                "sha256:a0df0043bdb289bde1f62da130d20df23d58b45429f752bc7a8fc5325a225ecd",
-                "sha256:df2f57871a96bbc1b69733cd4c51dc33bea66146b8c63cacbfed73eec0883017",
+                "sha256:a2c306dea656c12c68f51f4cea133cbe78ca7435eb28c735eac1d3ebe73be6e8",
-                "sha256:e2f085ce2e813a50dfd0e01fbfc0c12bbe5d2063d99f8b29da30e544fb6483b8",
+                "sha256:a7830bab239b79cda9c08c2da014761cafb48da6150e1da17ac06283f43b6089",
-                "sha256:e642d86b8f956098b564a45e6f6ce68a22c2c97a04f5acd3f221f57b8cb850ae",
+                "sha256:a7c711e21628b52034bb5ab8d1bce291f752fcc5e92accc615778acee1ff4778",
-                "sha256:e9e0a277bb2eb5d8a7407e14688b85fd8ad628ee4e0c7930415687b6564207a4",
+                "sha256:aaf159caa35993cb1f56fb9b8e4610d35758e7ca005412eb1daa856a78c9c4b1",
-                "sha256:ea2bb7e2ae9e37d96835b3576a4fa4b3a97592fbea8ef7c3587078b0068b8f09",
+                "sha256:ae506e6902902557576a26ff33eda8695e7ecb3cb36c3b573a0765dee114ebdb",
-                "sha256:ee4d528022f4c5ff67332469e10efe06a267e32f4067dc76bb7e2cddf3cd25ff",
+                "sha256:b507f5c4c1d508876d1819b6bf9a49d365b96320b5d4993426b33a23ca4b8261",
-                "sha256:f05d4198c1bacc9124018109c5fba2f3201dbe7ab6e92ff100494f236209c960",
+                "sha256:bf162abab1c1a736333192707cef898e735a5ca00f38f27eeedf44b39d9e85eb",
-                "sha256:f34dc300df798742b3d06515aa2a0aee20941c13579d7a2f2e10af01ae4901ee",
+                "sha256:c1a2af6c6ef86344a6b0db6b97834208bf598db514f2b155042439b62605601a",
-                "sha256:f4162988a360a29af158aeb4a2f4f09ffed6a969c9776f8f3bdee9b06a8ab7e5",
+                "sha256:c2d37ab77531417474168eb79d6d80b14f821a966818505d03013d0833edb7a8",
-                "sha256:f486038e44caa08dbd97275a9a35a283a8f1d2f0ee60ac260a1790e76660833c",
+                "sha256:c4fc99836233ea196540b17ab0983aff60ed07941751930f5f4d05bc3b3b7359",
-                "sha256:f7de08cbe5551911886d1ab60de58448c6df0f67d9feb7d1fb21e9875ef95e91"
+                "sha256:d581b735e177fdcdce6fed8e7e8880a3fb6ee4e3653a3ac6af01c6f4c03effc5",
+                "sha256:d6da64deb6b8ed903e7560180a92f2d804ee1ba5eeb849ac2748b8c1aba1f6d7",
+                "sha256:d8e8286dd7cea7895157318d1b91cdacac64c479f3cbc8dce548331728484751",
+                "sha256:ddea102b48f9e339f3948bf22040944184627a30fdf7f858667673b9c5f033c8",
+                "sha256:dfa20cc6ca228e6b155b11da03825975ce66aea520985dbbddf0f2a5a495c605",
+                "sha256:e3e5193ef5a3dc73bceee50f7fdc2c90dbb76c42df8d8fae3d1067a583df579e",
+                "sha256:e3eeb0aabd6bd5ce64faae67e9935203a6991b4bc2a485a767fbafb2c5125f45",
+                "sha256:e5805d5a22fd19c8ccff10a9561f9df94436b0545619ea579db2d3c35294bce2",
+                "sha256:e85b752a1e912b70eaad4fafbd4d1238007ab221de2009b9a2f5ae7461239895",
+                "sha256:eaf7fa2de5c0be8ae6ff8e9bea2ccd725e980541244521d8d4b5f3354a27babe",
+                "sha256:ebfb099f8dcf083deef3ac1ca4c1503f387cf76296fcb3816b66f5ecb5f54fdb",
+                "sha256:ece3d2cfe132e7d51f44a832b303895e6f2d499c5e74dfbdb06ee246147a304a",
+                "sha256:ed9749eef4cbd126da3dc1d6bcb3a57f5eb7ac6a6484146bdbf743f552dfc577",
+                "sha256:ede83e07a75dd06bc501566c1eca2afc0d61677c1472ac9ad93fdee6e638a48d",
+                "sha256:ef4aea96ce4d3b074422cb4f2f64e216bf9e213004bb58ecfdf50ea02ea8eb9a",
+                "sha256:f3a3570c4a2a16746ac2c31a7c7c7b0c186b95ce902e33db6f28094ed7387dda",
+                "sha256:f407cb6b8e9d6d8c626bc73c945db1706035af8fd632295547bf1c9e46d092d6",
+                "sha256:f74a575920ab21fe304421a3fc28793d82e299cae9eccb37084e9fc7f3617c20"
             ],
             "index": "pypi",
-            "markers": "python_version >= '3.10'",
+            "markers": "python_version >= '3.11'",
-            "version": "==2.2.4"
+            "version": "==2.4.6"
         },
         "pycodestyle": {
             "hashes": [

__tests__/install-python.test.ts

@@ -31,6 +31,10 @@ describe('getManifest', () => {
     jest.resetAllMocks();
   });
 
+  afterEach(() => {
+    jest.useRealTimers();
+  });
+
   it('should return manifest from repo', async () => {
     (tc.getManifestFromRepo as jest.Mock).mockResolvedValue(mockManifest);
     const manifest = await getManifest();
@@ -38,14 +42,70 @@ describe('getManifest', () => {
   });
 
   it('should return manifest from URL if repo fetch fails', async () => {
+    jest.useFakeTimers();
     (tc.getManifestFromRepo as jest.Mock).mockRejectedValue(
       new Error('Fetch failed')
     );
     (httpm.HttpClient.prototype.getJson as jest.Mock).mockResolvedValue({
       result: mockManifest
     });
+    const promise = getManifest();
+    await jest.runAllTimersAsync();
+    const manifest = await promise;
+    expect(manifest).toEqual(mockManifest);
+  });
+
+  it('should fall back to URL if repo returns a truncated/empty manifest', async () => {
+    jest.useFakeTimers();
+    (tc.getManifestFromRepo as jest.Mock).mockResolvedValue([]);
+    (httpm.HttpClient.prototype.getJson as jest.Mock).mockResolvedValue({
+      result: mockManifest
+    });
+    const promise = getManifest();
+    await jest.runAllTimersAsync();
+    const manifest = await promise;
+    expect(manifest).toEqual(mockManifest);
+  });
+
+  it('should retry on a transient invalid manifest and then succeed', async () => {
+    jest.useFakeTimers();
+    (tc.getManifestFromRepo as jest.Mock)
+      .mockResolvedValueOnce([])
+      .mockResolvedValueOnce(mockManifest);
+    const promise = getManifest();
+    await jest.runAllTimersAsync();
+    const manifest = await promise;
+    expect(manifest).toEqual(mockManifest);
+    expect(tc.getManifestFromRepo as jest.Mock).toHaveBeenCalledTimes(2);
+  });
+
+  it('should fail loudly when the manifest is truncated/empty on every source', async () => {
+    jest.useFakeTimers();
+    (tc.getManifestFromRepo as jest.Mock).mockResolvedValue([]);
+    (httpm.HttpClient.prototype.getJson as jest.Mock).mockResolvedValue({
+      result: []
+    });
+    const promise = getManifest();
+    // Prevent unhandled rejection before timers advance.
+    const catchPromise = promise.catch(() => {});
+    await jest.runAllTimersAsync();
+    await catchPromise;
+    await expect(promise).rejects.toThrow(
+      'Failed to fetch the Python versions manifest'
+    );
+  });
+
+  it('should not retry the API on a rate-limit error and fall back to URL immediately', async () => {
+    const rateLimitError = Object.assign(new Error('API rate limit exceeded'), {
+      httpStatusCode: 403
+    });
+    (tc.getManifestFromRepo as jest.Mock).mockRejectedValue(rateLimitError);
+    (httpm.HttpClient.prototype.getJson as jest.Mock).mockResolvedValue({
+      result: mockManifest
+    });
     const manifest = await getManifest();
     expect(manifest).toEqual(mockManifest);
+    expect(tc.getManifestFromRepo as jest.Mock).toHaveBeenCalledTimes(1);
   });
 });
 

dist/setup/index.js

@@ -55685,6 +55685,8 @@ function findRhelRelease(semanticVersionSpec, architecture, manifest, osVersion)
     }
     return undefined;
 }
+const MANIFEST_FETCH_MAX_ATTEMPTS = 3;
+const MANIFEST_FETCH_RETRY_BASE_DELAY_MS = 1000;
 async function findReleaseFromManifest(semanticVersionSpec, architecture, manifest) {
     if (!manifest) {
         manifest = await getManifest();
@@ -55712,15 +55714,54 @@ function isIToolRelease(obj) {
             typeof file.arch === 'string' &&
             typeof file.download_url === 'string'));
 }
+// Rejects empty or truncated manifest responses.
+function isValidManifest(manifest) {
+    return (Array.isArray(manifest) &&
+        manifest.length > 0 &&
+        manifest.every(isIToolRelease));
+}
+function sleep(ms) {
+    return new Promise(resolve => setTimeout(resolve, ms));
+}
+// HTTP 403/429 from http-client (`statusCode`) or tool-cache (`httpStatusCode`).
+function isRateLimitError(err) {
+    const e = err;
+    const status = e?.httpStatusCode ?? e?.statusCode;
+    return status === 403 || status === 429;
+}
+// Fetches and validates a manifest, retrying transient failures with backoff.
+async function fetchValidManifest(source, fetcher) {
+    let lastError;
+    let attempts = 0;
+    for (let attempt = 1; attempt <= MANIFEST_FETCH_MAX_ATTEMPTS; attempt++) {
+        attempts = attempt;
+        try {
+            const manifest = await fetcher();
+            if (isValidManifest(manifest)) {
+                return manifest;
+            }
+            throw new Error(`The manifest fetched from ${source} is empty, truncated, or does not contain any valid tool release entries.`);
+        }
+        catch (err) {
+            lastError = err instanceof Error ? err : new Error(String(err));
+            core.debug(`Attempt ${attempt}/${MANIFEST_FETCH_MAX_ATTEMPTS} to fetch the manifest from ${source} failed: ${lastError.message}`);
+            // Rate limits won't clear within the backoff window; fall back instead.
+            if (isRateLimitError(err)) {
+                core.debug(`${source} is rate-limited; skipping retries for this source.`);
+                break;
+            }
+            if (attempt < MANIFEST_FETCH_MAX_ATTEMPTS) {
+                const delay = MANIFEST_FETCH_RETRY_BASE_DELAY_MS * 2 ** (attempt - 1);
+                core.debug(`Retrying in ${delay}ms...`);
+                await sleep(delay);
+            }
+        }
+    }
+    throw new Error(`Failed to fetch a valid manifest from ${source} after ${attempts} attempt(s): ${lastError?.message}`);
+}
 async function getManifest() {
     try {
-        const repoManifest = await getManifestFromRepo();
+        return await fetchValidManifest('the GitHub API', getManifestFromRepo);
-        if (Array.isArray(repoManifest) &&
-            repoManifest.length &&
-            repoManifest.every(isIToolRelease)) {
-            return repoManifest;
-        }
-        throw new Error('The repository manifest is invalid or does not include any valid tool release (IToolRelease) entries.');
     }
     catch (err) {
         core.debug('Fetching the manifest via the API failed.');
@@ -55728,10 +55769,17 @@ async function getManifest() {
             core.debug(err.message);
         }
         else {
-            core.error('An unexpected error occurred while fetching the manifest.');
+            core.debug('An unexpected error occurred while fetching the manifest.');
         }
     }
-    return await getManifestFromURL();
+    try {
+        return await fetchValidManifest('the raw URL', getManifestFromURL);
+    }
+    catch (err) {
+        const message = err instanceof Error ? err.message : String(err);
+        // Fail loudly so the action doesn't exit 0 without installing Python.
+        throw new Error(`Failed to fetch the Python versions manifest. The response was empty, truncated, or invalid, and all retries were exhausted. ${message}`);
+    }
 }
 function getManifestFromRepo() {
     core.debug(`Getting manifest from ${MANIFEST_REPO_OWNER}/${MANIFEST_REPO_NAME}@${MANIFEST_REPO_BRANCH}`);
@@ -55759,7 +55807,13 @@ async function installPython(workingDirectory) {
                 core.info(data.toString().trim());
             },
             stderr: (data) => {
-                core.error(data.toString().trim());
+                const msg = data.toString().trim();
+                if (/^WARNING:/im.test(msg)) {
+                    core.warning(msg);
+                }
+                else {
+                    core.error(msg);
+                }
             }
         }
     };

src/install-python.ts

@@ -80,6 +80,9 @@ function findRhelRelease(
   return undefined;
 }
 
+const MANIFEST_FETCH_MAX_ATTEMPTS = 3;
+const MANIFEST_FETCH_RETRY_BASE_DELAY_MS = 1000;
+
 export async function findReleaseFromManifest(
   semanticVersionSpec: string,
   architecture: string,
@@ -133,28 +136,95 @@ function isIToolRelease(obj: any): obj is IToolRelease {
   );
 }
 
+// Rejects empty or truncated manifest responses.
+function isValidManifest(manifest: unknown): manifest is tc.IToolRelease[] {
+  return (
+    Array.isArray(manifest) &&
+    manifest.length > 0 &&
+    manifest.every(isIToolRelease)
+  );
+}
+
+function sleep(ms: number): Promise<void> {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
+// HTTP 403/429 from http-client (`statusCode`) or tool-cache (`httpStatusCode`).
+function isRateLimitError(err: unknown): boolean {
+  const e = err as
+    | {httpStatusCode?: number; statusCode?: number}
+    | null
+    | undefined;
+  const status = e?.httpStatusCode ?? e?.statusCode;
+  return status === 403 || status === 429;
+}
+
+// Fetches and validates a manifest, retrying transient failures with backoff.
+async function fetchValidManifest(
+  source: string,
+  fetcher: () => Promise<tc.IToolRelease[]>
+): Promise<tc.IToolRelease[]> {
+  let lastError: Error | undefined;
+  let attempts = 0;
+
+  for (let attempt = 1; attempt <= MANIFEST_FETCH_MAX_ATTEMPTS; attempt++) {
+    attempts = attempt;
+    try {
+      const manifest = await fetcher();
+      if (isValidManifest(manifest)) {
+        return manifest;
+      }
+      throw new Error(
+        `The manifest fetched from ${source} is empty, truncated, or does not contain any valid tool release entries.`
+      );
+    } catch (err) {
+      lastError = err instanceof Error ? err : new Error(String(err));
+      core.debug(
+        `Attempt ${attempt}/${MANIFEST_FETCH_MAX_ATTEMPTS} to fetch the manifest from ${source} failed: ${lastError.message}`
+      );
+
+      // Rate limits won't clear within the backoff window; fall back instead.
+      if (isRateLimitError(err)) {
+        core.debug(
+          `${source} is rate-limited; skipping retries for this source.`
+        );
+        break;
+      }
+
+      if (attempt < MANIFEST_FETCH_MAX_ATTEMPTS) {
+        const delay = MANIFEST_FETCH_RETRY_BASE_DELAY_MS * 2 ** (attempt - 1);
+        core.debug(`Retrying in ${delay}ms...`);
+        await sleep(delay);
+      }
+    }
+  }
+
+  throw new Error(
+    `Failed to fetch a valid manifest from ${source} after ${attempts} attempt(s): ${lastError?.message}`
+  );
+}
+
 export async function getManifest(): Promise<tc.IToolRelease[]> {
   try {
-    const repoManifest = await getManifestFromRepo();
+    return await fetchValidManifest('the GitHub API', getManifestFromRepo);
-    if (
-      Array.isArray(repoManifest) &&
-      repoManifest.length &&
-      repoManifest.every(isIToolRelease)
-    ) {
-      return repoManifest;
-    }
-    throw new Error(
-      'The repository manifest is invalid or does not include any valid tool release (IToolRelease) entries.'
-    );
   } catch (err) {
     core.debug('Fetching the manifest via the API failed.');
     if (err instanceof Error) {
       core.debug(err.message);
     } else {
-      core.error('An unexpected error occurred while fetching the manifest.');
+      core.debug('An unexpected error occurred while fetching the manifest.');
     }
   }
-  return await getManifestFromURL();
+
+  try {
+    return await fetchValidManifest('the raw URL', getManifestFromURL);
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err);
+    // Fail loudly so the action doesn't exit 0 without installing Python.
+    throw new Error(
+      `Failed to fetch the Python versions manifest. The response was empty, truncated, or invalid, and all retries were exhausted. ${message}`
+    );
+  }
 }
 
 export function getManifestFromRepo(): Promise<tc.IToolRelease[]> {
@@ -193,7 +263,12 @@ async function installPython(workingDirectory: string) {
         core.info(data.toString().trim());
       },
       stderr: (data: Buffer) => {
-        core.error(data.toString().trim());
+        const msg = data.toString().trim();
+        if (/^WARNING:/im.test(msg)) {
+          core.warning(msg);
+        } else {
+          core.error(msg);
+        }
       }
     }
   };