Bump smol-toml from 1.4.2 to 1.5.2

Bumps [smol-toml](https://github.com/squirrelchat/smol-toml) from 1.4.2 to 1.5.2. - [Release notes](https://github.com/squirrelchat/smol-toml/releases) - [Commits](https://github.com/squirrelchat/smol-toml/compare/v1.4.2...v1.5.2) --- updated-dependencies: - dependency-name: smol-toml dependency-version: 1.5.2 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>
2026-01-23 04:01:58 +00:00 · 2025-12-08 10:17:57 +00:00
32 changed files with 14379 additions and 3202 deletions
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -23,7 +23,7 @@ and configures the environment for subsequent workflow steps.
 **Size**: Small-medium repository (~50 source files, ~400 total files including dependencies)
 **Languages**: TypeScript (primary), JavaScript (compiled output), JSON (configuration)
 **Runtime**: Node.js 24 (GitHub Actions runtime)
-**Key Dependencies**: @actions/core, @actions/cache, @actions/tool-cache
+**Key Dependencies**: @actions/core, @actions/cache, @actions/tool-cache, @octokit/core

 ### Core Architecture

--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -41,13 +41,13 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false

      # Initializes the CodeQL tools for scanning.
      - name: Initialize CodeQL
-        uses: github/codeql-action/init@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
+        uses: github/codeql-action/init@fe4161a26a8629af62121b670040955b330f9af2 # v4.31.6
        with:
          languages: ${{ matrix.language }}
          source-root: src
@@ -59,7 +59,7 @@ jobs:
      # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
      # If this step fails, then you should remove it and run the build manually (see below)
      - name: Autobuild
-        uses: github/codeql-action/autobuild@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
+        uses: github/codeql-action/autobuild@fe4161a26a8629af62121b670040955b330f9af2 # v4.31.6

      # ℹ️ Command-line programs to run using the OS shell.
      # 📚 https://git.io/JvXDl
@@ -73,4 +73,4 @@ jobs:
      #   make release

      - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
+        uses: github/codeql-action/analyze@fe4161a26a8629af62121b670040955b330f9af2 # v4.31.6
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,14 +21,14 @@ jobs:
    permissions:
      security-events: write # for zizmor
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Actionlint
        uses: eifinger/actionlint-action@213860089b7cf97d640aa67567898fabeb132746 # v1.9.3
      - name: Run zizmor
        uses: zizmorcore/zizmor-action@e639db99335bc9038abc0e066dfcd72e23d26fb4 # v0.3.0
-      - uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f # v6.1.0
+      - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
        with:
          node-version-file: .nvmrc
          cache: npm
@@ -51,7 +51,7 @@ jobs:
      matrix:
        os: [ubuntu-latest, macos-latest, macos-14, windows-latest]
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install latest version
@@ -76,7 +76,7 @@ jobs:
  test-uv-no-modify-path:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install with UV_NO_MODIFY_PATH set
@@ -125,7 +125,7 @@ jobs:
            expected-version: "0.1.0"
            resolution-strategy: "lowest"
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install version ${{ matrix.input.version-input }} with strategy ${{ matrix.input.resolution-strategy || 'highest' }}
@@ -154,7 +154,7 @@ jobs:
      matrix:
        version-input: ["latest", ">=0.8"]
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install version ${{ matrix.version-input }}
@@ -182,7 +182,7 @@ jobs:
          - working-directory: "__tests__/fixtures/uv-toml-project"
            expected-version: "0.5.15"
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install version from ${{ matrix.input.working-directory }}
@@ -208,7 +208,7 @@ jobs:
          - version-file: "__tests__/fixtures/.tool-versions"
            expected-version: "0.5.15"
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install version from ${{ matrix.input.version-file }}
@@ -225,7 +225,7 @@ jobs:
  test-malformed-pyproject-file-fallback:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install using malformed pyproject.toml
@@ -245,7 +245,7 @@ jobs:
          - os: macos-latest
            checksum: "a70cbfbf3bb5c08b2f84963b4f12c94e08fbb2468ba418a3bfe1066fbe9e7218"
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Checksum matches expected
@@ -259,7 +259,7 @@ jobs:
  test-with-explicit-token:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install default version
@@ -272,7 +272,7 @@ jobs:
  test-uvx:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install default version
@@ -285,7 +285,7 @@ jobs:
      matrix:
        os: [ubuntu-latest, macos-latest, macos-14, windows-latest]
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install default version
@@ -296,7 +296,7 @@ jobs:
  test-tilde-expansion-tool-dirs:
    runs-on: selfhosted-ubuntu-arm64
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup with cache
@@ -321,11 +321,10 @@ jobs:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install latest version
-        id: setup-uv
        uses: ./
        with:
          python-version: 3.13.1t
@@ -336,14 +335,6 @@ jobs:
            exit 1
          fi
        shell: bash
-      - name: Verify output python-version is correct
-        run: |
-          if [ "$PYTHON_VERSION" != "3.13.1t" ]; then
-            exit 1
-          fi
-        shell: bash
-        env:
-          PYTHON_VERSION: ${{ steps.setup-uv.outputs.python-version }}
      - run: uv sync
        working-directory: __tests__/fixtures/uv-project

@@ -353,7 +344,7 @@ jobs:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install latest version
@@ -390,64 +381,14 @@ jobs:
    runs-on: ubuntu-latest
    container: alpine
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install latest version
-        id: setup-uv
        uses: ./
-        with:
-          enable-cache: true
-      - name: Verify cache key contains alpine
-        run: |
-          echo "Cache key: $CACHE_KEY"
-          if echo "$CACHE_KEY" | grep -qv "alpine"; then
-            echo "Cache key does not contain 'alpine'"
-            exit 1
-          fi
-        shell: sh
-        env:
-          CACHE_KEY: ${{ steps.setup-uv.outputs.cache-key }}
      - run: uv sync
        working-directory: __tests__/fixtures/uv-project

-  test-cache-key-os-version:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        include:
-          - os: ubuntu-22.04
-            expected-os: "ubuntu-22.04"
-          - os: ubuntu-24.04
-            expected-os: "ubuntu-24.04"
-          - os: macos-14
-            expected-os: "macos-14"
-          - os: macos-15
-            expected-os: "macos-15"
-          - os: windows-2022
-            expected-os: "windows-2022"
-          - os: windows-2025
-            expected-os: "windows-2025"
-    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
-        with:
-          persist-credentials: false
-      - name: Setup uv
-        id: setup-uv
-        uses: ./
-        with:
-          enable-cache: true
-      - name: Verify cache key contains OS version
-        run: |
-          echo "Cache key: $CACHE_KEY"
-          if [[ "$CACHE_KEY" != *"${{ matrix.expected-os }}"* ]]; then
-            echo "Cache key does not contain expected OS version: ${{ matrix.expected-os }}"
-            exit 1
-          fi
-        shell: bash
-        env:
-          CACHE_KEY: ${{ steps.setup-uv.outputs.cache-key }}
-
  test-setup-cache:
    runs-on: ${{ matrix.os }}
    strategy:
@@ -455,7 +396,7 @@ jobs:
        enable-cache: ["true", "false", "auto"]
        os: ["ubuntu-latest", "selfhosted-ubuntu-arm64", "windows-latest"]
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup with cache
@@ -474,7 +415,7 @@ jobs:
        os: ["ubuntu-latest", "selfhosted-ubuntu-arm64", "windows-latest"]
    needs: test-setup-cache
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Restore with cache
@@ -508,7 +449,7 @@ jobs:
  test-setup-cache-requirements-txt:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup with cache
@@ -524,7 +465,7 @@ jobs:
    runs-on: ubuntu-latest
    needs: test-setup-cache-requirements-txt
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Restore with cache
@@ -548,7 +489,7 @@ jobs:
  test-setup-cache-dependency-glob:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup with cache
@@ -565,7 +506,7 @@ jobs:
    runs-on: ubuntu-latest
    needs: test-setup-cache-dependency-glob
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Change pyproject.toml
@@ -593,7 +534,7 @@ jobs:
  test-setup-cache-save-cache-false:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup with cache
@@ -609,7 +550,7 @@ jobs:
    runs-on: ubuntu-latest
    needs: test-setup-cache-save-cache-false
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Restore with cache
@@ -629,7 +570,7 @@ jobs:
  test-setup-cache-restore-cache-false:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup with cache
@@ -644,7 +585,7 @@ jobs:
    runs-on: ubuntu-latest
    needs: test-setup-cache-restore-cache-false
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Restore with cache
@@ -674,7 +615,7 @@ jobs:
            expected-cache-dir: "/home/ubuntu/.cache/uv"
    runs-on: ${{ matrix.inputs.os }}
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup with cache
@@ -692,7 +633,7 @@ jobs:
  test-cache-local-cache-disabled:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup without cache
@@ -711,7 +652,7 @@ jobs:
  test-cache-local-cache-disabled-but-explicit-path:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup without cache
@@ -731,7 +672,7 @@ jobs:
  test-setup-cache-local:
    runs-on: selfhosted-ubuntu-arm64
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup with cache
@@ -746,7 +687,7 @@ jobs:
    runs-on: selfhosted-ubuntu-arm64
    needs: test-setup-cache-local
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Restore with cache
@@ -769,7 +710,7 @@ jobs:
  test-tilde-expansion-cache-local-path:
    runs-on: selfhosted-ubuntu-arm64
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Create cache directory
@@ -785,7 +726,7 @@ jobs:
  test-tilde-expansion-cache-dependency-glob:
    runs-on: selfhosted-ubuntu-arm64
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Create cache directory
@@ -820,7 +761,7 @@ jobs:
  test-no-python-version:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Fake pyproject.toml at root
@@ -835,7 +776,7 @@ jobs:
  test-custom-manifest-file:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install from custom manifest file
@@ -854,7 +795,7 @@ jobs:
  test-absolute-path:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Create requirements.txt
@@ -874,7 +815,7 @@ jobs:
  test-relative-path:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: mkdir
@@ -898,7 +839,7 @@ jobs:
  test-cache-prune-force:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Setup uv
@@ -915,7 +856,7 @@ jobs:
  test-cache-dir-from-file:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Verify uv cache dir is not populated
@@ -940,7 +881,7 @@ jobs:
  test-cache-python-installs:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Verify Python install dir is not populated
@@ -967,7 +908,7 @@ jobs:
    runs-on: ubuntu-latest
    needs: test-cache-python-installs
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Verify Python install dir does not exist
@@ -995,7 +936,7 @@ jobs:
            exit 1
          fi
        env:
-          CACHE_HIT: ${{ steps.restore.outputs.python-cache-hit }}
+          CACHE_HIT: ${{ steps.restore.outputs.cache-hit }}
      - run: uv sync --managed-python
        working-directory: __tests__/fixtures/uv-project

@@ -1011,7 +952,7 @@ jobs:
            expected-python-dir: "/home/ubuntu/.local/share/uv/python"
    runs-on: ${{ matrix.inputs.os }}
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install latest version
@@ -1030,7 +971,7 @@ jobs:
  test-act:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: false
      - name: Install act
@@ -1042,15 +983,6 @@ jobs:
        env:
          GH_TOKEN: ${{ github.token }}

-  validate-typings:
-    runs-on: "ubuntu-latest"
-    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
-        with:
-          persist-credentials: false
-      - name: Validate typings
-        uses: typesafegithub/github-actions-typing@184d97003b1300f6a10e286eb98c191e416ff02b # v2.2.1
-
  all-tests-passed:
    runs-on: ubuntu-latest
    needs:
@@ -1070,7 +1002,6 @@ jobs:
      - test-python-version
      - test-activate-environment
      - test-musl
-      - test-cache-key-os-version
      - test-cache-local
      - test-cache-local-cache-disabled
      - test-cache-local-cache-disabled-but-explicit-path
@@ -1099,7 +1030,6 @@ jobs:
      - test-restore-python-installs
      - test-python-install-dir
      - test-act
-      - validate-typings
    if: always()
    steps:
      - name: All tests passed
--- a/.github/workflows/update-known-versions.yml
+++ b/.github/workflows/update-known-versions.yml
@@ -15,10 +15,10 @@ jobs:
      contents: write
      pull-requests: write
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: true
-      - uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f # v6.1.0
+      - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
        with:
          node-version: "20"
      - name: Update known versions
@@ -27,6 +27,7 @@ jobs:
          node dist/update-known-versions/index.js
          src/download/checksum/known-checksums.ts
          version-manifest.json
+          ${{ secrets.GITHUB_TOKEN }}
      - name: Check for changes
        id: changes-exist
        run: |
@@ -54,7 +55,7 @@ jobs:

      - name: Create Pull Request
        if: ${{ steps.changes-exist.outputs.changes-exist == 'true' && steps.commit-and-push.outcome != 'success' }}
-        uses: peter-evans/create-pull-request@98357b18bf14b5342f975ff684046ec3b2a07725 # v8.0.0
+        uses: peter-evans/create-pull-request@84ae59a2cdc2258d6fa0732dd66352dddae2a412 # v7.0.9
        with:
          commit-message: "chore: update known checksums"
          title:
--- a/.github/workflows/update-major-minor-tags.yml
+++ b/.github/workflows/update-major-minor-tags.yml
@@ -17,7 +17,7 @@ jobs:
    permissions:
      contents: write
    steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          persist-credentials: true # needed for git push below
      - name: Update Major Minor Tags
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1 +0,0 @@
-.github/copilot-instructions.md
--- a/README.md
+++ b/README.md
@@ -125,8 +125,6 @@ Have a look under [Advanced Configuration](#advanced-configuration) for detailed
 - `uvx-path`: The path to the installed uvx binary.
 - `cache-hit`: A boolean value to indicate a cache entry was found.
 - `venv`: Path to the activated venv if activate-environment is true.
- `python-version`: The Python version that was set.
- `python-cache-hit`: A boolean value to indicate the Python cache entry was found.

 ### Python version

@@ -202,8 +200,7 @@ by name (`uv`).
 With `setup-uv`, you can install a specific version of Python using `uv python install` rather than
 relying on `actions/setup-python`.

-Using `actions/setup-python` can be faster (~1s), because GitHub includes several Python versions in the runner image
-which are available to get activated by `actions/setup-python` without having to download them.
+Using `actions/setup-python` can be faster, because GitHub caches the Python versions alongside the runner.

 For example:

--- a/tests/download/versions-client.test.ts
+++ b/tests/download/versions-client.test.ts
@@ -1,142 +0,0 @@
-import { beforeEach, describe, expect, it, jest } from "@jest/globals";
-
-// biome-ignore lint/suspicious/noExplicitAny: mock needs flexible typing
-const mockFetch = jest.fn<any>();
-jest.mock("../../src/utils/fetch", () => ({
-  fetch: mockFetch,
-}));
-
-import {
-  clearCache,
-  fetchVersionData,
-  getAllVersions,
-  getArtifact,
-  getLatestVersion,
-} from "../../src/download/versions-client";
-
-const sampleNdjsonResponse = `{"version":"0.9.26","artifacts":[{"platform":"aarch64-apple-darwin","variant":"default","url":"https://github.com/astral-sh/uv/releases/download/0.9.26/uv-aarch64-apple-darwin.tar.gz","archive_format":"tar.gz","sha256":"fcf0a9ea6599c6ae28a4c854ac6da76f2c889354d7c36ce136ef071f7ab9721f"},{"platform":"x86_64-pc-windows-msvc","variant":"default","url":"https://github.com/astral-sh/uv/releases/download/0.9.26/uv-x86_64-pc-windows-msvc.zip","archive_format":"zip","sha256":"eb02fd95d8e0eed462b4a67ecdd320d865b38c560bffcda9a0b87ec944bdf036"}]}
-{"version":"0.9.25","artifacts":[{"platform":"aarch64-apple-darwin","variant":"default","url":"https://github.com/astral-sh/uv/releases/download/0.9.25/uv-aarch64-apple-darwin.tar.gz","archive_format":"tar.gz","sha256":"606b3c6949d971709f2526fa0d9f0fd23ccf60e09f117999b406b424af18a6a6"}]}`;
-
-function createMockResponse(
-  ok: boolean,
-  status: number,
-  statusText: string,
-  data: string,
-) {
-  return {
-    ok,
-    status,
-    statusText,
-    text: async () => data,
-  };
-}
-
-describe("versions-client", () => {
-  beforeEach(() => {
-    clearCache();
-    mockFetch.mockReset();
-  });
-
-  describe("fetchVersionData", () => {
-    it("should fetch and parse NDJSON data", async () => {
-      mockFetch.mockResolvedValue(
-        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
-      );
-
-      const versions = await fetchVersionData();
-
-      expect(versions).toHaveLength(2);
-      expect(versions[0].version).toBe("0.9.26");
-      expect(versions[1].version).toBe("0.9.25");
-    });
-
-    it("should throw error on failed fetch", async () => {
-      mockFetch.mockResolvedValue(
-        createMockResponse(false, 500, "Internal Server Error", ""),
-      );
-
-      await expect(fetchVersionData()).rejects.toThrow(
-        "Failed to fetch version data: 500 Internal Server Error",
-      );
-    });
-
-    it("should cache results", async () => {
-      mockFetch.mockResolvedValue(
-        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
-      );
-
-      await fetchVersionData();
-      await fetchVersionData();
-
-      expect(mockFetch).toHaveBeenCalledTimes(1);
-    });
-  });
-
-  describe("getLatestVersion", () => {
-    it("should return the first version (newest)", async () => {
-      mockFetch.mockResolvedValue(
-        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
-      );
-
-      const latest = await getLatestVersion();
-
-      expect(latest).toBe("0.9.26");
-    });
-  });
-
-  describe("getAllVersions", () => {
-    it("should return all version strings", async () => {
-      mockFetch.mockResolvedValue(
-        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
-      );
-
-      const versions = await getAllVersions();
-
-      expect(versions).toEqual(["0.9.26", "0.9.25"]);
-    });
-  });
-
-  describe("getArtifact", () => {
-    beforeEach(() => {
-      mockFetch.mockResolvedValue(
-        createMockResponse(true, 200, "OK", sampleNdjsonResponse),
-      );
-    });
-
-    it("should find artifact by version and platform", async () => {
-      const artifact = await getArtifact("0.9.26", "aarch64", "apple-darwin");
-
-      expect(artifact).toEqual({
-        sha256:
-          "fcf0a9ea6599c6ae28a4c854ac6da76f2c889354d7c36ce136ef071f7ab9721f",
-        url: "https://github.com/astral-sh/uv/releases/download/0.9.26/uv-aarch64-apple-darwin.tar.gz",
-      });
-    });
-
-    it("should find Windows artifact", async () => {
-      const artifact = await getArtifact("0.9.26", "x86_64", "pc-windows-msvc");
-
-      expect(artifact).toEqual({
-        sha256:
-          "eb02fd95d8e0eed462b4a67ecdd320d865b38c560bffcda9a0b87ec944bdf036",
-        url: "https://github.com/astral-sh/uv/releases/download/0.9.26/uv-x86_64-pc-windows-msvc.zip",
-      });
-    });
-
-    it("should return undefined for unknown version", async () => {
-      const artifact = await getArtifact("0.0.1", "aarch64", "apple-darwin");
-
-      expect(artifact).toBeUndefined();
-    });
-
-    it("should return undefined for unknown platform", async () => {
-      const artifact = await getArtifact(
-        "0.9.26",
-        "aarch64",
-        "unknown-linux-musl",
-      );
-
-      expect(artifact).toBeUndefined();
-    });
-  });
-});
--- a/tests/fixtures/old-python-constraint-project/pyproject.toml
+++ b/tests/fixtures/old-python-constraint-project/pyproject.toml
@@ -9,5 +9,5 @@ dependencies = [
 ]

 [build-system]
-requires = ["uv_build>=0.9.22,<0.10.0"]
-build-backend = "uv_build"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
--- a/tests/fixtures/old-python-constraint-project/uv.lock
+++ b/tests/fixtures/old-python-constraint-project/uv.lock
@@ -1,9 +1,33 @@
 version = 1
-revision = 3
-requires-python = ">=3.8, <=3.9"
+requires-python = ">=3.12"

 [[package]]
-name = "old-python-constraint-project"
+name = "ruff"
+version = "0.6.2"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/23/f4/279d044f66b79261fd37df76bf72b64471afab5d3b7906a01499c4451910/ruff-0.6.2.tar.gz", hash = "sha256:239ee6beb9e91feb8e0ec384204a763f36cb53fb895a1a364618c6abb076b3be", size = 2460281 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/72/4b/47dd7a69287afb4069fa42c198e899463605460a58120196711bfcf0446b/ruff-0.6.2-py3-none-linux_armv6l.whl", hash = "sha256:5c8cbc6252deb3ea840ad6a20b0f8583caab0c5ef4f9cca21adc5a92b8f79f3c", size = 9695871 },
+    { url = "https://files.pythonhosted.org/packages/ae/c3/8aac62ac4638c14a740ee76a755a925f2d0d04580ab790a9887accb729f6/ruff-0.6.2-py3-none-macosx_10_12_x86_64.whl", hash = "sha256:17002fe241e76544448a8e1e6118abecbe8cd10cf68fde635dad480dba594570", size = 9459354 },
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+]
+
+[[package]]
+name = "uv-project"
 version = "0.1.0"
 source = { editable = "." }
 dependencies = [
@@ -11,30 +35,4 @@ dependencies = [
 ]

 [package.metadata]
-requires-dist = [{ name = "ruff", specifier = ">=0.6.2" }]
-
-[[package]]
-name = "ruff"
-version = "0.14.10"
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-]
+requires-dist = [{ name = "ruff" }]
--- a/action-types.yml
+++ b/action-types.yml
@@ -1,75 +0,0 @@
-# See https://github.com/typesafegithub/github-actions-typing
-
-inputs:
-  version:
-    type: string
-  version-file:
-    type: string
-  python-version:
-    type: string
-  activate-environment:
-    type: boolean
-  working-directory:
-    type: string
-  checksum:
-    type: string
-  github-token:
-    type: string
-  enable-cache:
-    type: enum
-    allowed-values:
-      - "true"
-      - "false"
-      - auto
-  cache-dependency-glob:
-    type: list
-    separator: "\n"
-    list-item:
-      type: string
-  restore-cache:
-    type: boolean
-  save-cache:
-    type: boolean
-  cache-suffix:
-    type: string
-  cache-local-path:
-    type: string
-  prune-cache:
-    type: boolean
-  cache-python:
-    type: boolean
-  ignore-nothing-to-cache:
-    type: boolean
-  ignore-empty-workdir:
-    type: boolean
-  tool-dir:
-    type: string
-  tool-bin-dir:
-    type: string
-  manifest-file:
-    type: string
-  add-problem-matchers:
-    type: boolean
-  resolution-strategy:
-    type: enum
-    allowed-values:
-      - highest
-      - lowest
-
-outputs:
-  uv-version:
-    type: string
-  uv-path:
-    type: string
-  uvx-path:
-    type: string
-  cache-hit:
-    type: boolean
-  cache-key:
-    type: string
-  venv:
-    type: string
-  python-version:
-    type: string
-  python-cache-hit:
-    type: boolean
--- a/action.yml
+++ b/action.yml
@@ -89,14 +89,8 @@ outputs:
    description: "The path to the installed uvx binary."
  cache-hit:
    description: "A boolean value to indicate a cache entry was found"
-  cache-key:
-    description: "The cache key used for storing/restoring the cache"
  venv:
    description: "Path to the activated venv if activate-environment is true"
-  python-version:
-    description: "The Python version that was set."
-  python-cache-hit:
-    description: "A boolean value to indicate the Python cache entry was found"
 runs:
  using: "node24"
  main: "dist/setup/index.js"
--- a/dist/save-cache/index.js
+++ b/dist/save-cache/index.js
@@ -90599,52 +90599,45 @@ var __importStar = (this && this.__importStar) || (function () {
    };
 })();
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.STATE_PYTHON_CACHE_MATCHED_KEY = exports.STATE_CACHE_MATCHED_KEY = exports.STATE_CACHE_KEY = void 0;
+exports.STATE_CACHE_MATCHED_KEY = exports.STATE_CACHE_KEY = void 0;
 exports.restoreCache = restoreCache;
 const cache = __importStar(__nccwpck_require__(5116));
 const core = __importStar(__nccwpck_require__(7484));
+const exec = __importStar(__nccwpck_require__(5236));
 const hash_files_1 = __nccwpck_require__(9660);
 const inputs_1 = __nccwpck_require__(9612);
 const platforms_1 = __nccwpck_require__(8361);
 exports.STATE_CACHE_KEY = "cache-key";
 exports.STATE_CACHE_MATCHED_KEY = "cache-matched-key";
-exports.STATE_PYTHON_CACHE_MATCHED_KEY = "python-cache-matched-key";
-const CACHE_VERSION = "2";
-async function restoreCache(pythonVersion) {
-    const cacheKey = await computeKeys(pythonVersion);
+const CACHE_VERSION = "1";
+async function restoreCache() {
+    const cacheKey = await computeKeys();
    core.saveState(exports.STATE_CACHE_KEY, cacheKey);
-    core.setOutput("cache-key", cacheKey);
    if (!inputs_1.restoreCache) {
        core.info("restore-cache is false. Skipping restore cache step.");
-        core.setOutput("python-cache-hit", false);
        return;
    }
+    let matchedKey;
+    core.info(`Trying to restore uv cache from GitHub Actions cache with key: ${cacheKey}`);
    if (inputs_1.cacheLocalPath === undefined) {
        throw new Error("cache-local-path is not set. Cannot restore cache without a valid cache path.");
    }
-    await restoreCacheFromKey(cacheKey, inputs_1.cacheLocalPath.path, exports.STATE_CACHE_MATCHED_KEY, "cache-hit");
+    const cachePaths = [inputs_1.cacheLocalPath.path];
    if (inputs_1.cachePython) {
-        await restoreCacheFromKey(`${cacheKey}-python`, inputs_1.pythonDir, exports.STATE_PYTHON_CACHE_MATCHED_KEY, "python-cache-hit");
+        cachePaths.push(inputs_1.pythonDir);
    }
-    else {
-        core.setOutput("python-cache-hit", false);
-    }
-}
-async function restoreCacheFromKey(cacheKey, cachePath, stateKey, outputKey) {
-    core.info(`Trying to restore cache from GitHub Actions cache with key: ${cacheKey}`);
-    let matchedKey;
    try {
-        matchedKey = await cache.restoreCache([cachePath], cacheKey);
+        matchedKey = await cache.restoreCache(cachePaths, cacheKey);
    }
    catch (err) {
        const message = err.message;
        core.warning(message);
-        core.setOutput(outputKey, false);
+        core.setOutput("cache-hit", false);
        return;
    }
-    handleMatchResult(matchedKey, cacheKey, stateKey, outputKey);
+    handleMatchResult(matchedKey, cacheKey);
 }
-async function computeKeys(pythonVersion) {
+async function computeKeys() {
    let cacheDependencyPathHash = "-";
    if (inputs_1.cacheDependencyGlob !== "") {
        core.info(`Searching files using cache dependency glob: ${inputs_1.cacheDependencyGlob.split("\n").join(",")}`);
@@ -90657,22 +90650,49 @@ async function computeKeys(pythonVersion) {
        cacheDependencyPathHash = "-no-dependency-glob";
    }
    const suffix = inputs_1.cacheSuffix ? `-${inputs_1.cacheSuffix}` : "";
-    const version = pythonVersion ?? "unknown";
+    const pythonVersion = await getPythonVersion();
    const platform = await (0, platforms_1.getPlatform)();
-    const osNameVersion = (0, platforms_1.getOSNameVersion)();
    const pruned = inputs_1.pruneCache ? "-pruned" : "";
    const python = inputs_1.cachePython ? "-py" : "";
-    return `setup-uv-${CACHE_VERSION}-${(0, platforms_1.getArch)()}-${platform}-${osNameVersion}-${version}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
+    return `setup-uv-${CACHE_VERSION}-${(0, platforms_1.getArch)()}-${platform}-${pythonVersion}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
 }
-function handleMatchResult(matchedKey, primaryKey, stateKey, outputKey) {
+async function getPythonVersion() {
+    if (inputs_1.pythonVersion !== "") {
+        return inputs_1.pythonVersion;
+    }
+    let output = "";
+    const options = {
+        listeners: {
+            stdout: (data) => {
+                output += data.toString();
+            },
+        },
+        silent: !core.isDebug(),
+    };
+    try {
+        const execArgs = ["python", "find", "--directory", inputs_1.workingDirectory];
+        await exec.exec("uv", execArgs, options);
+        const pythonPath = output.trim();
+        output = "";
+        await exec.exec(pythonPath, ["--version"], options);
+        // output is like "Python 3.8.10"
+        return output.split(" ")[1].trim();
+    }
+    catch (error) {
+        const err = error;
+        core.debug(`Failed to get python version from uv. Error: ${err.message}`);
+        return "unknown";
+    }
+}
+function handleMatchResult(matchedKey, primaryKey) {
    if (!matchedKey) {
        core.info(`No GitHub Actions cache found for key: ${primaryKey}`);
-        core.setOutput(outputKey, false);
+        core.setOutput("cache-hit", false);
        return;
    }
-    core.saveState(stateKey, matchedKey);
-    core.info(`cache restored from GitHub Actions cache with key: ${matchedKey}`);
-    core.setOutput(outputKey, true);
+    core.saveState(exports.STATE_CACHE_MATCHED_KEY, matchedKey);
+    core.info(`uv cache restored from GitHub Actions cache with key: ${matchedKey}`);
+    core.setOutput("cache-hit", true);
 }


@@ -90846,17 +90866,46 @@ async function saveCache() {
    }
    if (matchedKey === cacheKey) {
        core.info(`Cache hit occurred on key ${cacheKey}, not saving cache.`);
+        return;
    }
-    else {
-        if (inputs_1.pruneCache) {
-            await pruneCache();
-        }
-        const actualCachePath = getUvCachePath();
-        await saveCacheToKey(cacheKey, actualCachePath, restore_cache_1.STATE_CACHE_MATCHED_KEY, "uv cache", `Cache path ${actualCachePath} does not exist on disk. This likely indicates that there are no dependencies to cache. Consider disabling the cache input if it is not needed.`);
+    if (inputs_1.pruneCache) {
+        await pruneCache();
    }
+    if (inputs_1.cacheLocalPath === undefined) {
+        throw new Error("cache-local-path is not set. Cannot save cache without a valid cache path.");
+    }
+    let actualCachePath = inputs_1.cacheLocalPath.path;
+    if (process.env.UV_CACHE_DIR &&
+        process.env.UV_CACHE_DIR !== inputs_1.cacheLocalPath.path) {
+        core.warning(`The environment variable UV_CACHE_DIR has been changed to "${process.env.UV_CACHE_DIR}", by an action or step running after astral-sh/setup-uv. This can lead to unexpected behavior. If you expected this to happen set the cache-local-path input to "${process.env.UV_CACHE_DIR}" instead of "${inputs_1.cacheLocalPath.path}".`);
+        actualCachePath = process.env.UV_CACHE_DIR;
+    }
+    core.info(`Saving cache path: ${actualCachePath}`);
+    if (!fs.existsSync(actualCachePath) && !inputs_1.ignoreNothingToCache) {
+        throw new Error(`Cache path ${actualCachePath} does not exist on disk. This likely indicates that there are no dependencies to cache. Consider disabling the cache input if it is not needed.`);
+    }
+    const cachePaths = [actualCachePath];
    if (inputs_1.cachePython) {
-        const pythonCacheKey = `${cacheKey}-python`;
-        await saveCacheToKey(pythonCacheKey, inputs_1.pythonDir, restore_cache_1.STATE_PYTHON_CACHE_MATCHED_KEY, "Python cache", `Python cache path ${inputs_1.pythonDir} does not exist on disk. This likely indicates that there are no Python installations to cache. Consider disabling the cache input if it is not needed.`);
+        core.info(`Including Python cache path: ${inputs_1.pythonDir}`);
+        if (!fs.existsSync(inputs_1.pythonDir) && !inputs_1.ignoreNothingToCache) {
+            throw new Error(`Python cache path ${inputs_1.pythonDir} does not exist on disk. This likely indicates that there are no dependencies to cache. Consider disabling the cache input if it is not needed.`);
+        }
+        cachePaths.push(inputs_1.pythonDir);
+    }
+    core.info(`Final cache paths: ${cachePaths.join(", ")}`);
+    try {
+        await cache.saveCache(cachePaths, cacheKey);
+        core.info(`cache saved with the key: ${cacheKey}`);
+    }
+    catch (e) {
+        if (e instanceof Error &&
+            e.message ===
+                "Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved.") {
+            core.info("No cacheable paths were found. Ignoring because ignore-nothing-to-save is enabled.");
+        }
+        else {
+            throw e;
+        }
    }
 }
 async function pruneCache() {
@@ -90872,42 +90921,6 @@ async function pruneCache() {
    const uvPath = core.getState(constants_1.STATE_UV_PATH);
    await exec.exec(uvPath, execArgs, options);
 }
-function getUvCachePath() {
-    if (inputs_1.cacheLocalPath === undefined) {
-        throw new Error("cache-local-path is not set. Cannot save cache without a valid cache path.");
-    }
-    if (process.env.UV_CACHE_DIR &&
-        process.env.UV_CACHE_DIR !== inputs_1.cacheLocalPath.path) {
-        core.warning(`The environment variable UV_CACHE_DIR has been changed to "${process.env.UV_CACHE_DIR}", by an action or step running after astral-sh/setup-uv. This can lead to unexpected behavior. If you expected this to happen set the cache-local-path input to "${process.env.UV_CACHE_DIR}" instead of "${inputs_1.cacheLocalPath.path}".`);
-        return process.env.UV_CACHE_DIR;
-    }
-    return inputs_1.cacheLocalPath.path;
-}
-async function saveCacheToKey(cacheKey, cachePath, stateKey, cacheName, pathNotExistErrorMessage) {
-    const matchedKey = core.getState(stateKey);
-    if (matchedKey === cacheKey) {
-        core.info(`${cacheName} hit occurred on key ${cacheKey}, not saving cache.`);
-        return;
-    }
-    core.info(`Including ${cacheName} path: ${cachePath}`);
-    if (!fs.existsSync(cachePath) && !inputs_1.ignoreNothingToCache) {
-        throw new Error(pathNotExistErrorMessage);
-    }
-    try {
-        await cache.saveCache([cachePath], cacheKey);
-        core.info(`${cacheName} saved with key: ${cacheKey}`);
-    }
-    catch (e) {
-        if (e instanceof Error &&
-            e.message ===
-                "Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved.") {
-            core.info(`No cacheable ${cacheName} paths were found. Ignoring because ignore-nothing-to-save is enabled.`);
-        }
-        else {
-            throw e;
-        }
-    }
-}
 run();


@@ -90980,13 +90993,12 @@ function getConfigValueFromTomlFile(filePath, key) {
 "use strict";

 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.VERSIONS_NDJSON_URL = exports.STATE_UV_VERSION = exports.STATE_UV_PATH = exports.TOOL_CACHE_NAME = exports.OWNER = exports.REPO = void 0;
+exports.STATE_UV_VERSION = exports.STATE_UV_PATH = exports.TOOL_CACHE_NAME = exports.OWNER = exports.REPO = void 0;
 exports.REPO = "uv";
 exports.OWNER = "astral-sh";
 exports.TOOL_CACHE_NAME = "uv";
 exports.STATE_UV_PATH = "uv-path";
 exports.STATE_UV_VERSION = "uv-version";
-exports.VERSIONS_NDJSON_URL = "https://raw.githubusercontent.com/astral-sh/versions/main/v1/uv.ndjson";


 /***/ }),
@@ -91170,7 +91182,7 @@ function getCacheDirFromConfig() {
 }
 function getUvPythonDir() {
    if (process.env.UV_PYTHON_INSTALL_DIR !== undefined) {
-        core.info(`UV_PYTHON_INSTALL_DIR is already set to ${process.env.UV_PYTHON_INSTALL_DIR}`);
+        core.info(`UV_PYTHON_INSTALL_DIR is already set to  ${process.env.UV_PYTHON_INSTALL_DIR}`);
        return process.env.UV_PYTHON_INSTALL_DIR;
    }
    if (process.env.RUNNER_ENVIRONMENT !== "github-hosted") {
@@ -91270,15 +91282,9 @@ var __importStar = (this && this.__importStar) || (function () {
        return result;
    };
 })();
-var __importDefault = (this && this.__importDefault) || function (mod) {
-    return (mod && mod.__esModule) ? mod : { "default": mod };
-};
 Object.defineProperty(exports, "__esModule", ({ value: true }));
 exports.getArch = getArch;
 exports.getPlatform = getPlatform;
-exports.getOSNameVersion = getOSNameVersion;
-const node_fs_1 = __importDefault(__nccwpck_require__(3024));
-const node_os_1 = __importDefault(__nccwpck_require__(8161));
 const core = __importStar(__nccwpck_require__(7484));
 const exec = __importStar(__nccwpck_require__(5236));
 function getArch() {
@@ -91336,63 +91342,6 @@ async function isMuslOs() {
        return false;
    }
 }
-/**
- * Returns OS name and version for cache key differentiation.
- * Examples: "ubuntu-22.04", "macos-14", "windows-2022"
- * Throws if OS detection fails.
- */
-function getOSNameVersion() {
-    const platform = process.platform;
-    if (platform === "linux") {
-        return getLinuxOSNameVersion();
-    }
-    if (platform === "darwin") {
-        return getMacOSNameVersion();
-    }
-    if (platform === "win32") {
-        return getWindowsNameVersion();
-    }
-    throw new Error(`Unsupported platform: ${platform}`);
-}
-function getLinuxOSNameVersion() {
-    const files = ["/etc/os-release", "/usr/lib/os-release"];
-    for (const file of files) {
-        try {
-            const content = node_fs_1.default.readFileSync(file, "utf8");
-            const id = parseOsReleaseValue(content, "ID");
-            const versionId = parseOsReleaseValue(content, "VERSION_ID");
-            if (id && versionId) {
-                return `${id}-${versionId}`;
-            }
-        }
-        catch {
-            // Try next file
-        }
-    }
-    throw new Error("Failed to determine Linux distribution. " +
-        "Could not read /etc/os-release or /usr/lib/os-release");
-}
-function parseOsReleaseValue(content, key) {
-    const regex = new RegExp(`^${key}=["']?([^"'\\n]*)["']?$`, "m");
-    const match = content.match(regex);
-    return match?.[1];
-}
-function getMacOSNameVersion() {
-    const darwinVersion = Number.parseInt(node_os_1.default.release().split(".")[0], 10);
-    if (Number.isNaN(darwinVersion)) {
-        throw new Error(`Failed to parse macOS version from: ${node_os_1.default.release()}`);
-    }
-    const macosVersion = darwinVersion - 9;
-    return `macos-${macosVersion}`;
-}
-function getWindowsNameVersion() {
-    const version = node_os_1.default.version();
-    const match = version.match(/Windows(?: Server)? (\d+)/);
-    if (!match) {
-        throw new Error(`Failed to parse Windows version from: ${version}`);
-    }
-    return `windows-${match[1]}`;
-}


 /***/ }),
@@ -91533,14 +91482,6 @@ module.exports = require("node:fs");

 /***/ }),

-/***/ 8161:
-/***/ ((module) => {
-
-"use strict";
-module.exports = require("node:os");
-
-/***/ }),
-
 /***/ 6760:
 /***/ ((module) => {

--- a/dist/setup/index.js
+++ b/dist/setup/index.js
--- a/dist/update-known-versions/index.js
+++ b/dist/update-known-versions/index.js
--- a/docs/caching.md
+++ b/docs/caching.md
@@ -2,34 +2,6 @@

 This document covers all caching-related configuration options for setup-uv.

-## Cache key
-
-The cache key is automatically generated based on:
-
- **Architecture**: CPU architecture (e.g., `x86_64`, `aarch64`)
- **Platform**: OS platform type (e.g., `unknown-linux-gnu`, `unknown-linux-musl`, `apple-darwin`,
-  `pc-windows-msvc`)
- **OS version**: OS name and version (e.g., `ubuntu-22.04`, `macos-14`, `windows-2022`)
- **Python version**: The Python version in use
- **Cache options**: Whether pruning and Python caching are enabled
- **Dependency hash**: Hash of files matching `cache-dependency-glob`
- **Suffix**: Optional `cache-suffix` if provided
-
-Including the OS version ensures that caches are not shared between different OS versions,
-preventing binary incompatibility issues when runner images change.
-
-The computed cache key is available as the `cache-key` output:
-
-```yaml
- name: Setup uv
-  id: setup-uv
-  uses: astral-sh/setup-uv@v7
-  with:
-    enable-cache: true
- name: Print cache key
-  run: echo "Cache key: ${{ steps.setup-uv.outputs.cache-key }}"
-```
-
 ## Enable caching

 > [!NOTE]
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,8 +15,11 @@
        "@actions/glob": "^0.5.0",
        "@actions/io": "^1.1.3",
        "@actions/tool-cache": "^2.0.2",
+        "@octokit/core": "^7.0.6",
+        "@octokit/plugin-paginate-rest": "^14.0.0",
+        "@octokit/plugin-rest-endpoint-methods": "^17.0.0",
        "@renovatebot/pep440": "^4.2.1",
-        "smol-toml": "^1.4.2",
+        "smol-toml": "^1.5.2",
        "undici": "5.28.5"
      },
      "devDependencies": {
@@ -1586,6 +1589,133 @@
        "@tybys/wasm-util": "^0.10.0"
      }
    },
+    "node_modules/@octokit/auth-token": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/auth-token/-/auth-token-6.0.0.tgz",
+      "integrity": "sha512-P4YJBPdPSpWTQ1NU4XYdvHvXJJDxM6YwpS0FZHRgP7YFkdVxsWcpWGy/NVqlAA7PcPCnMacXlRm1y2PFZRWL/w==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@octokit/core": {
+      "version": "7.0.6",
+      "resolved": "https://registry.npmjs.org/@octokit/core/-/core-7.0.6.tgz",
+      "integrity": "sha512-DhGl4xMVFGVIyMwswXeyzdL4uXD5OGILGX5N8Y+f6W7LhC1Ze2poSNrkF/fedpVDHEEZ+PHFW0vL14I+mm8K3Q==",
+      "license": "MIT",
+      "dependencies": {
+        "@octokit/auth-token": "^6.0.0",
+        "@octokit/graphql": "^9.0.3",
+        "@octokit/request": "^10.0.6",
+        "@octokit/request-error": "^7.0.2",
+        "@octokit/types": "^16.0.0",
+        "before-after-hook": "^4.0.0",
+        "universal-user-agent": "^7.0.0"
+      },
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@octokit/endpoint": {
+      "version": "11.0.2",
+      "resolved": "https://registry.npmjs.org/@octokit/endpoint/-/endpoint-11.0.2.tgz",
+      "integrity": "sha512-4zCpzP1fWc7QlqunZ5bSEjxc6yLAlRTnDwKtgXfcI/FxxGoqedDG8V2+xJ60bV2kODqcGB+nATdtap/XYq2NZQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@octokit/types": "^16.0.0",
+        "universal-user-agent": "^7.0.2"
+      },
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@octokit/graphql": {
+      "version": "9.0.3",
+      "resolved": "https://registry.npmjs.org/@octokit/graphql/-/graphql-9.0.3.tgz",
+      "integrity": "sha512-grAEuupr/C1rALFnXTv6ZQhFuL1D8G5y8CN04RgrO4FIPMrtm+mcZzFG7dcBm+nq+1ppNixu+Jd78aeJOYxlGA==",
+      "license": "MIT",
+      "dependencies": {
+        "@octokit/request": "^10.0.6",
+        "@octokit/types": "^16.0.0",
+        "universal-user-agent": "^7.0.0"
+      },
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@octokit/openapi-types": {
+      "version": "27.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/openapi-types/-/openapi-types-27.0.0.tgz",
+      "integrity": "sha512-whrdktVs1h6gtR+09+QsNk2+FO+49j6ga1c55YZudfEG+oKJVvJLQi3zkOm5JjiUXAagWK2tI2kTGKJ2Ys7MGA==",
+      "license": "MIT"
+    },
+    "node_modules/@octokit/plugin-paginate-rest": {
+      "version": "14.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/plugin-paginate-rest/-/plugin-paginate-rest-14.0.0.tgz",
+      "integrity": "sha512-fNVRE7ufJiAA3XUrha2omTA39M6IXIc6GIZLvlbsm8QOQCYvpq/LkMNGyFlB1d8hTDzsAXa3OKtybdMAYsV/fw==",
+      "license": "MIT",
+      "dependencies": {
+        "@octokit/types": "^16.0.0"
+      },
+      "engines": {
+        "node": ">= 20"
+      },
+      "peerDependencies": {
+        "@octokit/core": ">=6"
+      }
+    },
+    "node_modules/@octokit/plugin-rest-endpoint-methods": {
+      "version": "17.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/plugin-rest-endpoint-methods/-/plugin-rest-endpoint-methods-17.0.0.tgz",
+      "integrity": "sha512-B5yCyIlOJFPqUUeiD0cnBJwWJO8lkJs5d8+ze9QDP6SvfiXSz1BF+91+0MeI1d2yxgOhU/O+CvtiZ9jSkHhFAw==",
+      "license": "MIT",
+      "dependencies": {
+        "@octokit/types": "^16.0.0"
+      },
+      "engines": {
+        "node": ">= 20"
+      },
+      "peerDependencies": {
+        "@octokit/core": ">=6"
+      }
+    },
+    "node_modules/@octokit/request": {
+      "version": "10.0.7",
+      "resolved": "https://registry.npmjs.org/@octokit/request/-/request-10.0.7.tgz",
+      "integrity": "sha512-v93h0i1yu4idj8qFPZwjehoJx4j3Ntn+JhXsdJrG9pYaX6j/XRz2RmasMUHtNgQD39nrv/VwTWSqK0RNXR8upA==",
+      "license": "MIT",
+      "dependencies": {
+        "@octokit/endpoint": "^11.0.2",
+        "@octokit/request-error": "^7.0.2",
+        "@octokit/types": "^16.0.0",
+        "fast-content-type-parse": "^3.0.0",
+        "universal-user-agent": "^7.0.2"
+      },
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@octokit/request-error": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@octokit/request-error/-/request-error-7.1.0.tgz",
+      "integrity": "sha512-KMQIfq5sOPpkQYajXHwnhjCC0slzCNScLHs9JafXc4RAJI+9f+jNDlBNaIMTvazOPLgb4BnlhGJOTbnN0wIjPw==",
+      "license": "MIT",
+      "dependencies": {
+        "@octokit/types": "^16.0.0"
+      },
+      "engines": {
+        "node": ">= 20"
+      }
+    },
+    "node_modules/@octokit/types": {
+      "version": "16.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/types/-/types-16.0.0.tgz",
+      "integrity": "sha512-sKq+9r1Mm4efXW1FCk7hFSeJo4QKreL/tTbR0rz/qx/r1Oa2VV83LTA/H/MuCOX7uCIJmQVRKBcbmWoySjAnSg==",
+      "license": "MIT",
+      "dependencies": {
+        "@octokit/openapi-types": "^27.0.0"
+      }
+    },
    "node_modules/@opentelemetry/api": {
      "version": "1.4.1",
      "resolved": "https://registry.npmjs.org/@opentelemetry/api/-/api-1.4.1.tgz",
@@ -2322,6 +2452,12 @@
      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
    },
+    "node_modules/before-after-hook": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/before-after-hook/-/before-after-hook-4.0.0.tgz",
+      "integrity": "sha512-q6tR3RPqIB1pMiTRMFcZwuG5T8vwp+vUvEG0vuI6B+Rikh5BfPp2fQ82c925FOs+b0lcFQ8CFrL+KbilfZFhOQ==",
+      "license": "Apache-2.0"
+    },
    "node_modules/brace-expansion": {
      "version": "1.1.12",
      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.12.tgz",
@@ -2931,6 +3067,22 @@
        "node": "^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0"
      }
    },
+    "node_modules/fast-content-type-parse": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/fast-content-type-parse/-/fast-content-type-parse-3.0.0.tgz",
+      "integrity": "sha512-ZvLdcY8P+N8mGQJahJV5G4U88CSvT1rP8ApL6uETe88MBXrBHAkZlSEySdUlyztF7ccb+Znos3TFqaepHxdhBg==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/fastify"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/fastify"
+        }
+      ],
+      "license": "MIT"
+    },
    "node_modules/fast-json-stable-stringify": {
      "version": "2.1.0",
      "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.1.0.tgz",
@@ -4751,10 +4903,9 @@
      }
    },
    "node_modules/smol-toml": {
-      "version": "1.4.2",
-      "resolved": "https://registry.npmjs.org/smol-toml/-/smol-toml-1.4.2.tgz",
-      "integrity": "sha512-rInDH6lCNiEyn3+hH8KVGFdbjc099j47+OSgbMrfDYX1CmXLfdKd7qi6IfcWj2wFxvSVkuI46M+wPGYfEOEj6g==",
-      "license": "BSD-3-Clause",
+      "version": "1.5.2",
+      "resolved": "https://registry.npmjs.org/smol-toml/-/smol-toml-1.5.2.tgz",
+      "integrity": "sha512-QlaZEqcAH3/RtNyet1IPIYPsEWAaYyXXv1Krsi+1L/QHppjX4Ifm8MQsBISz9vE8cHicIq3clogsheili5vhaQ==",
      "engines": {
        "node": ">= 18"
      },
@@ -5213,6 +5364,12 @@
      "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==",
      "license": "MIT"
    },
+    "node_modules/universal-user-agent": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/universal-user-agent/-/universal-user-agent-7.0.3.tgz",
+      "integrity": "sha512-TmnEAEAsBJVZM/AADELsK76llnwcf9vMKuPz8JflO1frO8Lchitr0fNaN9d+Ap0BjKtqWqd/J17qeDnXh8CL2A==",
+      "license": "ISC"
+    },
    "node_modules/unrs-resolver": {
      "version": "1.11.1",
      "resolved": "https://registry.npmjs.org/unrs-resolver/-/unrs-resolver-1.11.1.tgz",
@@ -6723,6 +6880,93 @@
        "@tybys/wasm-util": "^0.10.0"
      }
    },
+    "@octokit/auth-token": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/auth-token/-/auth-token-6.0.0.tgz",
+      "integrity": "sha512-P4YJBPdPSpWTQ1NU4XYdvHvXJJDxM6YwpS0FZHRgP7YFkdVxsWcpWGy/NVqlAA7PcPCnMacXlRm1y2PFZRWL/w=="
+    },
+    "@octokit/core": {
+      "version": "7.0.6",
+      "resolved": "https://registry.npmjs.org/@octokit/core/-/core-7.0.6.tgz",
+      "integrity": "sha512-DhGl4xMVFGVIyMwswXeyzdL4uXD5OGILGX5N8Y+f6W7LhC1Ze2poSNrkF/fedpVDHEEZ+PHFW0vL14I+mm8K3Q==",
+      "requires": {
+        "@octokit/auth-token": "^6.0.0",
+        "@octokit/graphql": "^9.0.3",
+        "@octokit/request": "^10.0.6",
+        "@octokit/request-error": "^7.0.2",
+        "@octokit/types": "^16.0.0",
+        "before-after-hook": "^4.0.0",
+        "universal-user-agent": "^7.0.0"
+      }
+    },
+    "@octokit/endpoint": {
+      "version": "11.0.2",
+      "resolved": "https://registry.npmjs.org/@octokit/endpoint/-/endpoint-11.0.2.tgz",
+      "integrity": "sha512-4zCpzP1fWc7QlqunZ5bSEjxc6yLAlRTnDwKtgXfcI/FxxGoqedDG8V2+xJ60bV2kODqcGB+nATdtap/XYq2NZQ==",
+      "requires": {
+        "@octokit/types": "^16.0.0",
+        "universal-user-agent": "^7.0.2"
+      }
+    },
+    "@octokit/graphql": {
+      "version": "9.0.3",
+      "resolved": "https://registry.npmjs.org/@octokit/graphql/-/graphql-9.0.3.tgz",
+      "integrity": "sha512-grAEuupr/C1rALFnXTv6ZQhFuL1D8G5y8CN04RgrO4FIPMrtm+mcZzFG7dcBm+nq+1ppNixu+Jd78aeJOYxlGA==",
+      "requires": {
+        "@octokit/request": "^10.0.6",
+        "@octokit/types": "^16.0.0",
+        "universal-user-agent": "^7.0.0"
+      }
+    },
+    "@octokit/openapi-types": {
+      "version": "27.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/openapi-types/-/openapi-types-27.0.0.tgz",
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+    },
+    "@octokit/plugin-paginate-rest": {
+      "version": "14.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/plugin-paginate-rest/-/plugin-paginate-rest-14.0.0.tgz",
+      "integrity": "sha512-fNVRE7ufJiAA3XUrha2omTA39M6IXIc6GIZLvlbsm8QOQCYvpq/LkMNGyFlB1d8hTDzsAXa3OKtybdMAYsV/fw==",
+      "requires": {
+        "@octokit/types": "^16.0.0"
+      }
+    },
+    "@octokit/plugin-rest-endpoint-methods": {
+      "version": "17.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/plugin-rest-endpoint-methods/-/plugin-rest-endpoint-methods-17.0.0.tgz",
+      "integrity": "sha512-B5yCyIlOJFPqUUeiD0cnBJwWJO8lkJs5d8+ze9QDP6SvfiXSz1BF+91+0MeI1d2yxgOhU/O+CvtiZ9jSkHhFAw==",
+      "requires": {
+        "@octokit/types": "^16.0.0"
+      }
+    },
+    "@octokit/request": {
+      "version": "10.0.7",
+      "resolved": "https://registry.npmjs.org/@octokit/request/-/request-10.0.7.tgz",
+      "integrity": "sha512-v93h0i1yu4idj8qFPZwjehoJx4j3Ntn+JhXsdJrG9pYaX6j/XRz2RmasMUHtNgQD39nrv/VwTWSqK0RNXR8upA==",
+      "requires": {
+        "@octokit/endpoint": "^11.0.2",
+        "@octokit/request-error": "^7.0.2",
+        "@octokit/types": "^16.0.0",
+        "fast-content-type-parse": "^3.0.0",
+        "universal-user-agent": "^7.0.2"
+      }
+    },
+    "@octokit/request-error": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@octokit/request-error/-/request-error-7.1.0.tgz",
+      "integrity": "sha512-KMQIfq5sOPpkQYajXHwnhjCC0slzCNScLHs9JafXc4RAJI+9f+jNDlBNaIMTvazOPLgb4BnlhGJOTbnN0wIjPw==",
+      "requires": {
+        "@octokit/types": "^16.0.0"
+      }
+    },
+    "@octokit/types": {
+      "version": "16.0.0",
+      "resolved": "https://registry.npmjs.org/@octokit/types/-/types-16.0.0.tgz",
+      "integrity": "sha512-sKq+9r1Mm4efXW1FCk7hFSeJo4QKreL/tTbR0rz/qx/r1Oa2VV83LTA/H/MuCOX7uCIJmQVRKBcbmWoySjAnSg==",
+      "requires": {
+        "@octokit/openapi-types": "^27.0.0"
+      }
+    },
    "@opentelemetry/api": {
      "version": "1.4.1",
      "resolved": "https://registry.npmjs.org/@opentelemetry/api/-/api-1.4.1.tgz",
@@ -7223,6 +7467,11 @@
      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
    },
+    "before-after-hook": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/before-after-hook/-/before-after-hook-4.0.0.tgz",
+      "integrity": "sha512-q6tR3RPqIB1pMiTRMFcZwuG5T8vwp+vUvEG0vuI6B+Rikh5BfPp2fQ82c925FOs+b0lcFQ8CFrL+KbilfZFhOQ=="
+    },
    "brace-expansion": {
      "version": "1.1.12",
      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.12.tgz",
@@ -7623,6 +7872,11 @@
        "jest-util": "30.2.0"
      }
    },
+    "fast-content-type-parse": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/fast-content-type-parse/-/fast-content-type-parse-3.0.0.tgz",
+      "integrity": "sha512-ZvLdcY8P+N8mGQJahJV5G4U88CSvT1rP8ApL6uETe88MBXrBHAkZlSEySdUlyztF7ccb+Znos3TFqaepHxdhBg=="
+    },
    "fast-json-stable-stringify": {
      "version": "2.1.0",
      "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.1.0.tgz",
@@ -8867,9 +9121,9 @@
      "dev": true
    },
    "smol-toml": {
-      "version": "1.4.2",
-      "resolved": "https://registry.npmjs.org/smol-toml/-/smol-toml-1.4.2.tgz",
-      "integrity": "sha512-rInDH6lCNiEyn3+hH8KVGFdbjc099j47+OSgbMrfDYX1CmXLfdKd7qi6IfcWj2wFxvSVkuI46M+wPGYfEOEj6g=="
+      "version": "1.5.2",
+      "resolved": "https://registry.npmjs.org/smol-toml/-/smol-toml-1.5.2.tgz",
+      "integrity": "sha512-QlaZEqcAH3/RtNyet1IPIYPsEWAaYyXXv1Krsi+1L/QHppjX4Ifm8MQsBISz9vE8cHicIq3clogsheili5vhaQ=="
    },
    "source-map": {
      "version": "0.6.1",
@@ -9156,6 +9410,11 @@
      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
      "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw=="
    },
+    "universal-user-agent": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/universal-user-agent/-/universal-user-agent-7.0.3.tgz",
+      "integrity": "sha512-TmnEAEAsBJVZM/AADELsK76llnwcf9vMKuPz8JflO1frO8Lchitr0fNaN9d+Ap0BjKtqWqd/J17qeDnXh8CL2A=="
+    },
    "unrs-resolver": {
      "version": "1.11.1",
      "resolved": "https://registry.npmjs.org/unrs-resolver/-/unrs-resolver-1.11.1.tgz",
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
    "package": "ncc build -o dist/setup src/setup-uv.ts && ncc build -o dist/save-cache src/save-cache.ts && ncc build -o dist/update-known-versions src/update-known-versions.ts",
    "test": "jest",
    "act": "act pull_request -W .github/workflows/test.yml --container-architecture linux/amd64 -s GITHUB_TOKEN=\"$(gh auth token)\"",
-    "update-known-versions": "RUNNER_TEMP=known_versions node dist/update-known-versions/index.js src/download/checksum/known-checksums.ts version-manifest.json",
+    "update-known-versions": "RUNNER_TEMP=known_versions node dist/update-known-versions/index.js src/download/checksum/known-versions.ts \"$(gh auth token)\"",
    "all": "npm run build && npm run check && npm run package && npm test"
  },
  "repository": {
@@ -32,8 +32,11 @@
    "@actions/glob": "^0.5.0",
    "@actions/io": "^1.1.3",
    "@actions/tool-cache": "^2.0.2",
+    "@octokit/core": "^7.0.6",
+    "@octokit/plugin-paginate-rest": "^14.0.0",
+    "@octokit/plugin-rest-endpoint-methods": "^17.0.0",
    "@renovatebot/pep440": "^4.2.1",
-    "smol-toml": "^1.4.2",
+    "smol-toml": "^1.5.2",
    "undici": "5.28.5"
  },
  "devDependencies": {
--- a/src/cache/restore-cache.ts
+++ b/src/cache/restore-cache.ts
@@ -1,5 +1,6 @@
 import * as cache from "@actions/cache";
 import * as core from "@actions/core";
+import * as exec from "@actions/exec";
 import { hashFiles } from "../hash/hash-files";
 import {
  cacheDependencyGlob,
@@ -8,75 +9,51 @@ import {
  cacheSuffix,
  pruneCache,
  pythonDir,
+  pythonVersion as pythonVersionInput,
  restoreCache as shouldRestoreCache,
+  workingDirectory,
 } from "../utils/inputs";
-import { getArch, getOSNameVersion, getPlatform } from "../utils/platforms";
+import { getArch, getPlatform } from "../utils/platforms";

 export const STATE_CACHE_KEY = "cache-key";
 export const STATE_CACHE_MATCHED_KEY = "cache-matched-key";
-export const STATE_PYTHON_CACHE_MATCHED_KEY = "python-cache-matched-key";
+const CACHE_VERSION = "1";

-const CACHE_VERSION = "2";
-
-export async function restoreCache(pythonVersion?: string): Promise<void> {
-  const cacheKey = await computeKeys(pythonVersion);
+export async function restoreCache(): Promise<void> {
+  const cacheKey = await computeKeys();
  core.saveState(STATE_CACHE_KEY, cacheKey);
-  core.setOutput("cache-key", cacheKey);

  if (!shouldRestoreCache) {
    core.info("restore-cache is false. Skipping restore cache step.");
-    core.setOutput("python-cache-hit", false);
    return;
  }

+  let matchedKey: string | undefined;
+  core.info(
+    `Trying to restore uv cache from GitHub Actions cache with key: ${cacheKey}`,
+  );
  if (cacheLocalPath === undefined) {
    throw new Error(
      "cache-local-path is not set. Cannot restore cache without a valid cache path.",
    );
  }
-
-  await restoreCacheFromKey(
-    cacheKey,
-    cacheLocalPath.path,
-    STATE_CACHE_MATCHED_KEY,
-    "cache-hit",
-  );
-
+  const cachePaths = [cacheLocalPath.path];
  if (cachePython) {
-    await restoreCacheFromKey(
-      `${cacheKey}-python`,
-      pythonDir,
-      STATE_PYTHON_CACHE_MATCHED_KEY,
-      "python-cache-hit",
-    );
-  } else {
-    core.setOutput("python-cache-hit", false);
+    cachePaths.push(pythonDir);
  }
-}
-
-async function restoreCacheFromKey(
-  cacheKey: string,
-  cachePath: string,
-  stateKey: string,
-  outputKey: string,
-): Promise<void> {
-  core.info(
-    `Trying to restore cache from GitHub Actions cache with key: ${cacheKey}`,
-  );
-  let matchedKey: string | undefined;
  try {
-    matchedKey = await cache.restoreCache([cachePath], cacheKey);
+    matchedKey = await cache.restoreCache(cachePaths, cacheKey);
  } catch (err) {
    const message = (err as Error).message;
    core.warning(message);
-    core.setOutput(outputKey, false);
+    core.setOutput("cache-hit", false);
    return;
  }

-  handleMatchResult(matchedKey, cacheKey, stateKey, outputKey);
+  handleMatchResult(matchedKey, cacheKey);
 }

-async function computeKeys(pythonVersion?: string): Promise<string> {
+async function computeKeys(): Promise<string> {
  let cacheDependencyPathHash = "-";
  if (cacheDependencyGlob !== "") {
    core.info(
@@ -93,27 +70,57 @@ async function computeKeys(pythonVersion?: string): Promise<string> {
    cacheDependencyPathHash = "-no-dependency-glob";
  }
  const suffix = cacheSuffix ? `-${cacheSuffix}` : "";
-  const version = pythonVersion ?? "unknown";
+  const pythonVersion = await getPythonVersion();
  const platform = await getPlatform();
-  const osNameVersion = getOSNameVersion();
  const pruned = pruneCache ? "-pruned" : "";
  const python = cachePython ? "-py" : "";
-  return `setup-uv-${CACHE_VERSION}-${getArch()}-${platform}-${osNameVersion}-${version}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
+  return `setup-uv-${CACHE_VERSION}-${getArch()}-${platform}-${pythonVersion}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
+}
+
+async function getPythonVersion(): Promise<string> {
+  if (pythonVersionInput !== "") {
+    return pythonVersionInput;
+  }
+
+  let output = "";
+  const options: exec.ExecOptions = {
+    listeners: {
+      stdout: (data: Buffer) => {
+        output += data.toString();
+      },
+    },
+    silent: !core.isDebug(),
+  };
+
+  try {
+    const execArgs = ["python", "find", "--directory", workingDirectory];
+    await exec.exec("uv", execArgs, options);
+    const pythonPath = output.trim();
+
+    output = "";
+    await exec.exec(pythonPath, ["--version"], options);
+    // output is like "Python 3.8.10"
+    return output.split(" ")[1].trim();
+  } catch (error) {
+    const err = error as Error;
+    core.debug(`Failed to get python version from uv. Error: ${err.message}`);
+    return "unknown";
+  }
 }

 function handleMatchResult(
  matchedKey: string | undefined,
  primaryKey: string,
-  stateKey: string,
-  outputKey: string,
 ): void {
  if (!matchedKey) {
    core.info(`No GitHub Actions cache found for key: ${primaryKey}`);
-    core.setOutput(outputKey, false);
+    core.setOutput("cache-hit", false);
    return;
  }

-  core.saveState(stateKey, matchedKey);
-  core.info(`cache restored from GitHub Actions cache with key: ${matchedKey}`);
-  core.setOutput(outputKey, true);
+  core.saveState(STATE_CACHE_MATCHED_KEY, matchedKey);
+  core.info(
+    `uv cache restored from GitHub Actions cache with key: ${matchedKey}`,
+  );
+  core.setOutput("cache-hit", true);
 }
--- a/src/download/checksum/checksum.ts
+++ b/src/download/checksum/checksum.ts
@@ -11,36 +11,28 @@ export async function validateChecksum(
  arch: Architecture,
  platform: Platform,
  version: string,
-  ndjsonChecksum?: string,
 ): Promise<void> {
-  // Priority: user-provided checksum > KNOWN_CHECKSUMS > NDJSON fallback
-  const key = `${arch}-${platform}-${version}`;
-  let checksumToUse: string | undefined;
-  let source: string;
-
+  let isValid: boolean | undefined;
  if (checkSum !== undefined && checkSum !== "") {
-    checksumToUse = checkSum;
-    source = "user-provided";
-  } else if (key in KNOWN_CHECKSUMS) {
-    checksumToUse = KNOWN_CHECKSUMS[key];
-    source = `known checksum for ${key}`;
-  } else if (ndjsonChecksum !== undefined && ndjsonChecksum !== "") {
-    checksumToUse = ndjsonChecksum;
-    source = "NDJSON version data";
+    isValid = await validateFileCheckSum(downloadPath, checkSum);
  } else {
-    core.debug(`No checksum found for ${key}.`);
-    return;
+    core.debug("Checksum not provided. Checking known checksums.");
+    const key = `${arch}-${platform}-${version}`;
+    if (key in KNOWN_CHECKSUMS) {
+      const knownChecksum = KNOWN_CHECKSUMS[`${arch}-${platform}-${version}`];
+      core.debug(`Checking checksum for ${arch}-${platform}-${version}.`);
+      isValid = await validateFileCheckSum(downloadPath, knownChecksum);
+    } else {
+      core.debug(`No known checksum found for ${key}.`);
+    }
  }

-  core.debug(`Using ${source}.`);
-  const isValid = await validateFileCheckSum(downloadPath, checksumToUse);
-
-  if (!isValid) {
-    throw new Error(
-      `Checksum for ${downloadPath} did not match ${checksumToUse}.`,
-    );
+  if (isValid === false) {
+    throw new Error(`Checksum for ${downloadPath} did not match ${checkSum}.`);
+  }
+  if (isValid === true) {
+    core.debug(`Checksum for ${downloadPath} is valid.`);
  }
-  core.debug(`Checksum for ${downloadPath} is valid.`);
 }

 async function validateFileCheckSum(
--- a/src/download/checksum/known-checksums.ts
+++ b/src/download/checksum/known-checksums.ts
@@ -1,329 +1,5 @@
 // AUTOGENERATED_DO_NOT_EDIT
 export const KNOWN_CHECKSUMS: { [key: string]: string } = {
-  "aarch64-apple-darwin-0.9.26":
-    "fcf0a9ea6599c6ae28a4c854ac6da76f2c889354d7c36ce136ef071f7ab9721f",
-  "aarch64-pc-windows-msvc-0.9.26":
-    "79e1398ec98681b1b0494ed3485b0f4565e98a7db109a3f205d0fcdc6a1992f7",
-  "aarch64-unknown-linux-gnu-0.9.26":
-    "f71040c59798f79c44c08a7a1c1af7de95a8d334ea924b47b67ad6b9632be270",
-  "aarch64-unknown-linux-musl-0.9.26":
-    "ba8698c36c00c22efed4bd3506339b03c95604d001f02eaf6fbc814c9224d801",
-  "arm-unknown-linux-musleabihf-0.9.26":
-    "8baa850e6f7a4f8edeef411891780161e95682bf291c85405fdc331925c425c2",
-  "armv7-unknown-linux-gnueabihf-0.9.26":
-    "f9cf9806b3bd434b4aca5de1a8412502a29bcbc908848cdea18e32480964ab79",
-  "armv7-unknown-linux-musleabihf-0.9.26":
-    "881df52998da192f0609be37abe445ab0d89f28daceecb171ea8a14088153aee",
-  "i686-pc-windows-msvc-0.9.26":
-    "2fa5e36d7dc3053962a95a2583b2bcc19aab2ec6c5d4c887cca58de819cf77dd",
-  "i686-unknown-linux-gnu-0.9.26":
-    "03548a2abd1d604724c9d65184b506d3eafef1b0a7d8cea974a083f5f9c9496f",
-  "i686-unknown-linux-musl-0.9.26":
-    "5208601b9baee1a04a604f441bd94a1ab91b511f142b27729b073f4286994f8f",
-  "powerpc64-unknown-linux-gnu-0.9.26":
-    "6ac6baa2dd7db742ff58a2d54e3fc09693e69c878666bcacf9d49bc58decc98a",
-  "powerpc64le-unknown-linux-gnu-0.9.26":
-    "1a7fbd268b7520e03747022f879113545a5bd71cad02e9cbabd591b268b5a36c",
-  "riscv64gc-unknown-linux-gnu-0.9.26":
-    "9f202ad04cc398dc77a6efe20ea91ec044ad66e1f7a60777e6efd20a357f479a",
-  "s390x-unknown-linux-gnu-0.9.26":
-    "f8e6b8f1264821add1ea21d592b4522300401f44ac4124fba9fea6874fd79797",
-  "x86_64-apple-darwin-0.9.26":
-    "171eb8c518313e157c5b4cec7b4f743bc6bab1bd23e09b646679a02d096a047f",
-  "x86_64-pc-windows-msvc-0.9.26":
-    "eb02fd95d8e0eed462b4a67ecdd320d865b38c560bffcda9a0b87ec944bdf036",
-  "x86_64-unknown-linux-gnu-0.9.26":
-    "30ccbf0a66dc8727a02b0e245c583ee970bdafecf3a443c1686e1b30ec4939e8",
-  "x86_64-unknown-linux-musl-0.9.26":
-    "708b752876aeeb753257e1d55470569789e465684c1d3bc1760db26360b6c28b",
-  "aarch64-apple-darwin-0.9.25":
-    "606b3c6949d971709f2526fa0d9f0fd23ccf60e09f117999b406b424af18a6a6",
-  "aarch64-pc-windows-msvc-0.9.25":
-    "6a4c2a753a94d9639725b435f5d1a65bfa25cd196d448ad60841f5fe81ef0052",
-  "aarch64-unknown-linux-gnu-0.9.25":
-    "a8f1d71a42c4470251a880348b2d28d530018693324175084fa1749d267c98c6",
-  "aarch64-unknown-linux-musl-0.9.25":
-    "11cddffc61826e3b7af02db37bc3ed8e9e6747dad328d45c8b02f89408afbf75",
-  "arm-unknown-linux-musleabihf-0.9.25":
-    "52f3a96605a7873ec44bb84c33ee08e717df61136fec121f715871cae5b779ec",
-  "armv7-unknown-linux-gnueabihf-0.9.25":
-    "7ae274742a5b2398bd75f9075536c7f0b3f99ebc8c6588c37e3bfcd9cc9d781d",
-  "armv7-unknown-linux-musleabihf-0.9.25":
-    "77220a539dfffe576cdc9b9e9ab5432c07dd1b63915c859c227883af7ba00538",
-  "i686-pc-windows-msvc-0.9.25":
-    "55dbf32074a76e029410620e7e3fbef9762799c7dfcf539b098ccc0a64cac9a3",
-  "i686-unknown-linux-gnu-0.9.25":
-    "b9dae29f4e37bc89e69836e59169a51d8cac4da118b7548a20b2269b19c94cad",
-  "i686-unknown-linux-musl-0.9.25":
-    "a84a159856a0227c273e86594d9cf8fbf84c56bd4eeeb9a665c946304c49dbec",
-  "powerpc64-unknown-linux-gnu-0.9.25":
-    "37bc519ebe5e4efb12fd155eb94512547a874f0e41251203b49d715f75eb5a20",
-  "powerpc64le-unknown-linux-gnu-0.9.25":
-    "a01a273b5cd64ece96d4589afbacaf5e99a0695f37ebe9a72fd6b2f7cf0a7071",
-  "riscv64gc-unknown-linux-gnu-0.9.25":
-    "9d9692f1bd5ff6d9db2c4bffc4ceeb8d8746ae03ddeca0b24a0f8fc9ea81b911",
-  "s390x-unknown-linux-gnu-0.9.25":
-    "92d5e4504ef83f421a841381678f871bf2a8821a69d3374dd638e2014d4762ab",
-  "x86_64-apple-darwin-0.9.25":
-    "4982dfff14b3548bc85d0fa0abec6ab8ae62836b218bf1223741ba1392ef93bf",
-  "x86_64-pc-windows-msvc-0.9.25":
-    "d63f8e59cf76bcce9cb8a3eac6c1a89adce0f89a29bacca978c9bf842f419277",
-  "x86_64-unknown-linux-gnu-0.9.25":
-    "fa1f4abfe101d43e820342210c3c6854028703770f81e95b119ed1e65ec81b35",
-  "x86_64-unknown-linux-musl-0.9.25":
-    "700776c376ce36ed5b731fcd699e141d897551f5111907987b63897e0c1ad797",
-  "aarch64-apple-darwin-0.9.24":
-    "89661d9a16682197086df54bb43d0b03e58e23d4d9360fc8c6c0166f2828fd71",
-  "aarch64-pc-windows-msvc-0.9.24":
-    "40ceb66af2667fc9b4d30a65ad8b8795d4effc39a44019b4218ad03f8f1d5a14",
-  "aarch64-unknown-linux-gnu-0.9.24":
-    "9b291a1a4f2fefc430e4fc49c00cb93eb448d41c5c79edf45211ceffedde3334",
-  "aarch64-unknown-linux-musl-0.9.24":
-    "b16359904ede857b90b68168f10b0f6bf500858df9bed4e7156dbc59fd3f0747",
-  "arm-unknown-linux-musleabihf-0.9.24":
-    "b343d7f49ea5c0982c9696cbc5c7f96d7053cf8f9c7383a58d6c0c44fbeb6422",
-  "armv7-unknown-linux-gnueabihf-0.9.24":
-    "8d05b55fe2108ecab3995c2b656679a72c543fd9dc72eeb3a525106a709cfdcb",
-  "armv7-unknown-linux-musleabihf-0.9.24":
-    "788d2bee1dfdb57a462f2a5c4e3d6e8c68ee9f9f1a938bdcdc00fa9e5edeaeec",
-  "i686-pc-windows-msvc-0.9.24":
-    "b49265a713cb3f874bcb373572095993d3098ab77cd2665483f53b24b788e5e9",
-  "i686-unknown-linux-gnu-0.9.24":
-    "940b8985c4d464c7cc69e40b17bf09d840b980028e1d82a3fb8dd007a737f29e",
-  "i686-unknown-linux-musl-0.9.24":
-    "4ffe6f377b7d68904d8d882af8adc85f2fa1bbccd26151785ff961adb67f2a99",
-  "powerpc64-unknown-linux-gnu-0.9.24":
-    "1fbaff65544a2c36bbd8992e2abe6c50179401745dc00b5e12bded89794056a4",
-  "powerpc64le-unknown-linux-gnu-0.9.24":
-    "57ea84430ccf49f97184d9ee21102b250214fc6e6af4a87eefaaf8bb7c9c2b9a",
-  "riscv64gc-unknown-linux-gnu-0.9.24":
-    "81a884380f0ee954afd968140aaa55df19f2bee30d74f3c0c94a11d2265bb388",
-  "s390x-unknown-linux-gnu-0.9.24":
-    "3da41f22f78f27a7764e303b07c68f5716f748128327c7d3d72f11c6b81b6c78",
-  "x86_64-apple-darwin-0.9.24":
-    "fda9b3203cce6ec3a37177440c33c4c1963c4957fff17e2820c60ab6ccd625da",
-  "x86_64-pc-windows-msvc-0.9.24":
-    "cf9d6fa12017199d19c6f9a8f7f55811c8c04d70681b8cb6d89ffb179f08cf1f",
-  "x86_64-unknown-linux-gnu-0.9.24":
-    "fb13ad85106da6b21dd16613afca910994446fe94a78ee0b5bed9c75cd066078",
-  "x86_64-unknown-linux-musl-0.9.24":
-    "cf307aa4271038daa334ca64e75aa40c0c085ce6fa0c0e6f21e41a2b62c7904d",
-  "aarch64-apple-darwin-0.9.23":
-    "3aae069424778d13ef45ebd2ec906c66ab10e459e7b33341a64cd371a3d70998",
-  "aarch64-pc-windows-msvc-0.9.23":
-    "dfdb23dbfa6c89847e4163f0b3b683de889df7d9bdf95a3909dfbc6430106304",
-  "aarch64-unknown-linux-gnu-0.9.23":
-    "d60b0b2aee79f9d83897615fed427bee1ea4ebcb2f15b48dd522319ecdb3de91",
-  "aarch64-unknown-linux-musl-0.9.23":
-    "ee987d943427ee24c1d3af79c7ad676950c9ad634e60a4d07e328d8a54fff92f",
-  "arm-unknown-linux-musleabihf-0.9.23":
-    "1950c235e76e007f75d30903dc5da6747a344c72a1608123feff720c134ecbfe",
-  "armv7-unknown-linux-gnueabihf-0.9.23":
-    "a7104ab491a0c2f0c58760bcb9a13cfb64c899e02a7b747c4d11da114b3f9114",
-  "armv7-unknown-linux-musleabihf-0.9.23":
-    "c5d494337a5ca86ad83d6a887634fda3f8392560799e4236a44d76f8e27621b6",
-  "i686-pc-windows-msvc-0.9.23":
-    "94292f02b7484616bb3cd7361411540a5a52e952d149eb6faeec610b6657015d",
-  "i686-unknown-linux-gnu-0.9.23":
-    "627627174d31e6fa270e91c7b2988558e4b18b86cc31de9222b6cf3b7354e9b7",
-  "i686-unknown-linux-musl-0.9.23":
-    "5f65a0eb1f9067a4f5149275faba3bcb3af94dd68fbce7cd9e93ba86b5bc59c3",
-  "powerpc64-unknown-linux-gnu-0.9.23":
-    "69e2925397d0e781e8525ad0fd22896a114ffa02f5055e7a360e4dda3796c24e",
-  "powerpc64le-unknown-linux-gnu-0.9.23":
-    "fb3ad2cb1a19f1bb4785580dc71837161147beab134fdc3eb4e8ccda577db1e0",
-  "riscv64gc-unknown-linux-gnu-0.9.23":
-    "0d1d9300e2df3155b0d0b071c292fb27f8213d91854decdfb27c293397dc8e0e",
-  "s390x-unknown-linux-gnu-0.9.23":
-    "7d0b411a365b0cd8fad2b336c259743e7381676654adfbdb4f887b4136820cb8",
-  "x86_64-apple-darwin-0.9.23":
-    "b5bbfbd5d8c7effa24b505365ae306116fdac58880bc9b024ec4c89435d57728",
-  "x86_64-pc-windows-msvc-0.9.23":
-    "bb6d2987906b27d3031640c4a909b6f7c134cd29674c41ef545c6e7d57dd6700",
-  "x86_64-unknown-linux-gnu-0.9.23":
-    "b7bd7d9b9c9c34327f1118f99fe8c298252787ea35f7b345b8bf639377f63217",
-  "x86_64-unknown-linux-musl-0.9.23":
-    "a824a0f5f7aa67b668f54756284d458a25dea332da6e558d303890d134cc06d1",
-  "aarch64-apple-darwin-0.9.22":
-    "4bfc6dacc9bcc9e433a9214a658495ca082b94fd607949b6745a955f34ccbc3c",
-  "aarch64-pc-windows-msvc-0.9.22":
-    "19b848523d5802279702f5df4ade6d45f17d111cf9e368883d4f6560f0426d49",
-  "aarch64-unknown-linux-gnu-0.9.22":
-    "2f8716c407d5da21b8a3e8609ed358147216aaab28b96b1d6d7f48e9bcc6254e",
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-    "23e0770034e31aaf47b0c84156b2e5ec7638ca0edc76a4cccb8bdc94bfd16159",
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-  "armv7-unknown-linux-musleabihf-0.9.22":
-    "c153ac78c571dbbd9bab54c954b93b496645efbd4d3a0689b03e04d0de17c30f",
-  "i686-pc-windows-msvc-0.9.22":
-    "f08889e9567feb1e802c9e588de60efef5a436630e4c211fbf4a2116928f69ab",
-  "i686-unknown-linux-gnu-0.9.22":
-    "841e534a28285dcadfea2ca0f848a9669df287990f93d64c6bf87a9794c98ec9",
-  "i686-unknown-linux-musl-0.9.22":
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-    "309c4a48d7f65cdf47aa7e1c5e02502556e04f486d46e9591f5b4196c92730a3",
-  "powerpc64le-unknown-linux-gnu-0.9.22":
-    "1e829630f8317cf3e9818c3ad1f9927fdc9d087cd38abb05f9587c19872a8560",
-  "riscv64gc-unknown-linux-gnu-0.9.22":
-    "d3036e36b330ad6caab68fa31c12c21f80c9b8cc7822416343a5100f09d6b640",
-  "s390x-unknown-linux-gnu-0.9.22":
-    "aff367a5c6ffb87b9cebbda4372464ca6aff69a53c81a94f1d78541be9677b2d",
-  "x86_64-apple-darwin-0.9.22":
-    "c0057ad78b475f343739b1bbe223361c1054524c9edf310ee1dc85a050207f86",
-  "x86_64-pc-windows-msvc-0.9.22":
-    "93a0a244f26eec208d8ea8077e3de743d9687ad76c190342722f1f57fa629457",
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-    "e170aed70ac0225feee612e855d3a57ae73c61ffb22c7e52c3fd33b87c286508",
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-    "84d087a8e77a223d80578919894f3103f46ca7c263250c3e0478ce7c38850349",
-  "aarch64-apple-darwin-0.9.21":
-    "473977236ef8ac5937c80de08a3599cb6ed6021d0e015e10f88076767877a153",
-  "aarch64-pc-windows-msvc-0.9.21":
-    "54f66a44108b1b68583c9da0a515195d011189874ec9547710c032801726e042",
-  "aarch64-unknown-linux-gnu-0.9.21":
-    "416984484783a357170c43f98e7d2d203f1fb595d6b3b95131513c53e50986ef",
-  "aarch64-unknown-linux-musl-0.9.21":
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-  "armv7-unknown-linux-gnueabihf-0.9.21":
-    "74b2a73b3569cbba8c73470eb45dfba393401c834dd432fc8bd2039b40b1dde6",
-  "armv7-unknown-linux-musleabihf-0.9.21":
-    "fa3806603be42aad687bb97ff5939a32f5e1c21d565155299410ad445669ce11",
-  "i686-pc-windows-msvc-0.9.21":
-    "941e2b656cf9c94eac4b751933b24e5820247d938958c3d62d9d95d0e2409956",
-  "i686-unknown-linux-gnu-0.9.21":
-    "73fbd705cb4b5c071318afee896ba9984e3a14fcf7842435a93c43dc9ca0a12c",
-  "i686-unknown-linux-musl-0.9.21":
-    "c38f823354fff387758f6288ad184b104f47520b3cee7d53e92f3666b3466f55",
-  "powerpc64-unknown-linux-gnu-0.9.21":
-    "2cf68ea2ff75c4a627101bfe22064d6646a03cd7ddb939c933f3d8127b8d5982",
-  "powerpc64le-unknown-linux-gnu-0.9.21":
-    "3ede0329f67f5db37914b5dfd6014c414d27e1bf0153dab8d5cc2e066da034dc",
-  "riscv64gc-unknown-linux-gnu-0.9.21":
-    "3b7b070afd9c7be5a6364f081081cf9fec2160b53eba46cad27304b8b158e4ab",
-  "s390x-unknown-linux-gnu-0.9.21":
-    "34bd75d67a5819c9f796a78b1ec9ebd48021d87d2391b4cf282249c4d026f145",
-  "x86_64-apple-darwin-0.9.21":
-    "26390da48bd55e21ab62451a80ad240ef6df10d4c48ec199cbb34c18b4288983",
-  "x86_64-pc-windows-msvc-0.9.21":
-    "d27952e73183ef8f6ee8c2a50cf8b3f2e08e01b6a9279a00a85cb261ea8d8337",
-  "x86_64-unknown-linux-gnu-0.9.21":
-    "0a1ab27383c28ef1c041f85cbbc609d8e3752dfb4b238d2ad97b208a52232baf",
-  "x86_64-unknown-linux-musl-0.9.21":
-    "7abc29b3a06a99fb23564400fe884f5798a1786dc2ca05b6e0f70c53de748ab2",
-  "aarch64-apple-darwin-0.9.20":
-    "c3f4b03a5d526119d41fa8b8f255aa8053c49d787778df654895e3d174b1519a",
-  "aarch64-pc-windows-msvc-0.9.20":
-    "ddba8b1ca82df9b49745c93855c670490d776027269cf7de404d951919c96ea7",
-  "aarch64-unknown-linux-gnu-0.9.20":
-    "0451ecac1d0ed43d5870927df84c3d1dc93d72cf1933310acfadce5ad457c587",
-  "aarch64-unknown-linux-musl-0.9.20":
-    "d1b645d63c70da3f6f2368ea4dbc9dd5534b54be74ae32dee8941531c6874b6d",
-  "arm-unknown-linux-musleabihf-0.9.20":
-    "ddbaab7f1413f181bafc96c8b18af8e69372373798d2294d03d3935fd829c939",
-  "armv7-unknown-linux-gnueabihf-0.9.20":
-    "e1b2f5e4298878e6ac1137f744ba38b59ce68abd6a43878e66a1cac4dd7efd0e",
-  "armv7-unknown-linux-musleabihf-0.9.20":
-    "afc4a709ad83773bafa4ba83afa44bb101e44b817c5ad620cb9c54b62fe52e4e",
-  "i686-pc-windows-msvc-0.9.20":
-    "d7e50a3bc433bbb08e7890206bec0623627e6a911a6c10322c98721bde1a9cb0",
-  "i686-unknown-linux-gnu-0.9.20":
-    "aec778b1c44607416102139b6bb6a7f53a313fce8ad1033049b10ac90ed3c597",
-  "i686-unknown-linux-musl-0.9.20":
-    "92dd40f272b65f8301f0f9559fe55ac99b340caba93fe1952172e3485494cbba",
-  "powerpc64-unknown-linux-gnu-0.9.20":
-    "c2abda00a2b53cde9b6c8380ef9773749d341039771d7447df5647d935eb54c6",
-  "powerpc64le-unknown-linux-gnu-0.9.20":
-    "f40409d551a30081ada78cca7a1a260c02a7d16c912d73988d8e212324dea758",
-  "riscv64gc-unknown-linux-gnu-0.9.20":
-    "6dda223f877ff3eb3eba2fcf14abfd36280e5db1c0480addf5da5273ece087d6",
-  "s390x-unknown-linux-gnu-0.9.20":
-    "8ca14c1a9fe47ad2293a321f061c7278b32d7bc200d2692662790ab6ccd395c1",
-  "x86_64-apple-darwin-0.9.20":
-    "0059dc2986e7032c12b7039e1a66e570ab5c3a41598263c76e5a9c4e7da9f971",
-  "x86_64-pc-windows-msvc-0.9.20":
-    "be51ed9fcba5be4ac9c41a46aaf8af5cef86624fe27e2c645771b174069e049d",
-  "x86_64-unknown-linux-gnu-0.9.20":
-    "01ac5d872ab4cf6b11965c9df317f699882405f0319872fe3dbbb3adb045600b",
-  "x86_64-unknown-linux-musl-0.9.20":
-    "0de686dcc02e0b045980779e7330f2deb98e6cd9ece40d3341bd45c6733e682d",
-  "aarch64-apple-darwin-0.9.18":
-    "dc3bee4abbb3bac267a3985a23ea7617d19d41ff381dbaf560ba415ad65af68f",
-  "aarch64-pc-windows-msvc-0.9.18":
-    "fadb43ba13091f44e1786fc3967e65c7786d86192aa205d718307c649927cfc2",
-  "aarch64-unknown-linux-gnu-0.9.18":
-    "f8e23ec786b18660ade6b033b6191b7e9c283c872eeb8c4531d56a873decf160",
-  "aarch64-unknown-linux-musl-0.9.18":
-    "b710ceb9889276cbd7ce04e2ca06b5bd3e288da465bd38f7dd17955c4e703a65",
-  "arm-unknown-linux-musleabihf-0.9.18":
-    "2219049d28baaa0764e0315996e26c70ef548a0ba59add7f42358575ab04b410",
-  "armv7-unknown-linux-gnueabihf-0.9.18":
-    "dddf55144884f5d83b9f5795f0b16d023abedf615505962a6ebcaaef2cb62815",
-  "armv7-unknown-linux-musleabihf-0.9.18":
-    "265d49a8976a5956d3cab524e85e86df5397ab0daf6bd77f1494b0b9e1c00b9a",
-  "i686-pc-windows-msvc-0.9.18":
-    "52bd6fedef821a2412de73c31fdcf41c31b0a5c5886a416c3ba1a3d282ff02b8",
-  "i686-unknown-linux-gnu-0.9.18":
-    "6cc0437382adddd0439c874c41625539523725d551da9f9aecf7c0a3e86a1c77",
-  "i686-unknown-linux-musl-0.9.18":
-    "a727b054337ce453e98b80d6eccaa913cf542c155f3252503aff3e613735c640",
-  "powerpc64-unknown-linux-gnu-0.9.18":
-    "522154f752a90513cedcc621071893e46fb05d025ce8f0d4523514e8a87417d7",
-  "powerpc64le-unknown-linux-gnu-0.9.18":
-    "0660534d548800b17d2fc1dcdaf0f284e48ca3e34fff2b8b5c1797610e18fc0e",
-  "riscv64gc-unknown-linux-gnu-0.9.18":
-    "db6f5cbbc56a7212e61445a8cd1fcf880dc2906b4cac8f945320f0ab8eb9bf75",
-  "s390x-unknown-linux-gnu-0.9.18":
-    "bfa789548a345189b70d9069d9d7ef8f9c2236f0d10e2ae47a13549ffded5b84",
-  "x86_64-apple-darwin-0.9.18":
-    "f86836c637333c65bbc7902acc9c49888eef9fbd15dccbc1946b10e30b041073",
-  "x86_64-pc-windows-msvc-0.9.18":
-    "28cbe5d30907a774bfe27a517a39b494ec6f7d3816bda8bbf6f9645490449182",
-  "x86_64-unknown-linux-gnu-0.9.18":
-    "c2def3db178ade63933fa15ffc96e882c196ce53e06173dcee05b36c5f6f68f5",
-  "x86_64-unknown-linux-musl-0.9.18":
-    "a55ae2d0d53c8f6541bb4d6afc95857ff33a97de8f1d23e9d09acdcb865c4a00",
-  "aarch64-apple-darwin-0.9.17":
-    "a1e1464aa1d04d5e5fa700aa2f2e10397d1114e835dbd56be25ba65c9a31bd99",
-  "aarch64-pc-windows-msvc-0.9.17":
-    "28423a27ad1d82347c00411a6792567119b3c1cfe775d3312c0e08a6b489be5b",
-  "aarch64-unknown-linux-gnu-0.9.17":
-    "e9eba97b7169e47fd3c926e409f0b714820f0befc23b3ae062780586a793e4cc",
-  "aarch64-unknown-linux-musl-0.9.17":
-    "f6f48a301f8e855765af42ef50257af0cebc9c5439dfdcbc188142941aea45ca",
-  "arm-unknown-linux-musleabihf-0.9.17":
-    "4d80f3509b6351882a64c1dd08f72a80e2b27f055a996295ef1f935bc3efcdde",
-  "armv7-unknown-linux-gnueabihf-0.9.17":
-    "30a6c041429e2176062573f33c5c44307cb756264224bcb005723a6e18cff34c",
-  "armv7-unknown-linux-musleabihf-0.9.17":
-    "6b034dc63735c2a4541430cbece688e28bce51a09e2ad1ea2c1646a6b24cf1c3",
-  "i686-pc-windows-msvc-0.9.17":
-    "6e93737710e31bf73fcc3b4b6da616bd341e9c6baf1162ddc1e7f65884063f50",
-  "i686-unknown-linux-gnu-0.9.17":
-    "d2426a6d10bedd83524599bb0fbe0ba22e681ed45e892b4fd29086b424daf02a",
-  "i686-unknown-linux-musl-0.9.17":
-    "988c7702a2e88092b30f16fb7f8c18284a8062044cf57e6abd1dfeae82aa6377",
-  "powerpc64-unknown-linux-gnu-0.9.17":
-    "5ad301d9fa15e0791ef96abd83f0ed97e7ac1191b4b7578caaad3151633fb17c",
-  "powerpc64le-unknown-linux-gnu-0.9.17":
-    "4958185c5febf22f1c4c84944334cb0d9262c2c2c93faf30c1e0abd26f9d94fa",
-  "riscv64gc-unknown-linux-gnu-0.9.17":
-    "feed7cc7b5fc8a99e683ee1761cf99e3da12b60a2a413b7b87a0447726a66369",
-  "s390x-unknown-linux-gnu-0.9.17":
-    "a297518913a0f0e4af1bce434440ca9d415728aaf828c7def0e913aa5c46da8f",
-  "x86_64-apple-darwin-0.9.17":
-    "249e7fb18d45c06ba283c48f0a8e586ecc5fbb9e8dad0923c4169a7c4db815b2",
-  "x86_64-pc-windows-msvc-0.9.17":
-    "ebc76197bf3e1a58f9dac6f70f49b0ebd3e6907ab35289ce228bce5ba8a3f201",
-  "x86_64-unknown-linux-gnu-0.9.17":
-    "0114d54f9aafd07516cf1cadfe72afa970f5fd293fbe82dd924b8a7b42c984d8",
-  "x86_64-unknown-linux-musl-0.9.17":
-    "ab616c1851e7b1ed377a9ff3997dcee184bea7eda0b20bc8607abba6c469cbad",
  "aarch64-apple-darwin-0.9.16":
    "db6d7fb299c35dc9bbbeb89cfa9aa55a9584f637d370c0a4c62a50df9c9294a7",
  "aarch64-pc-windows-msvc-0.9.16":
--- a/src/download/checksum/update-known-checksums.ts
+++ b/src/download/checksum/update-known-checksums.ts
@@ -1,13 +1,9 @@
 import { promises as fs } from "node:fs";
-
-export interface ChecksumEntry {
-  key: string;
-  checksum: string;
-}
-
+import * as tc from "@actions/tool-cache";
+import { KNOWN_CHECKSUMS } from "./known-checksums";
 export async function updateChecksums(
  filePath: string,
-  checksumEntries: ChecksumEntry[],
+  downloadUrls: string[],
 ): Promise<void> {
  await fs.rm(filePath);
  await fs.appendFile(
@@ -15,12 +11,49 @@ export async function updateChecksums(
    "// AUTOGENERATED_DO_NOT_EDIT\nexport const KNOWN_CHECKSUMS: { [key: string]: string } = {\n",
  );
  let firstLine = true;
-  for (const entry of checksumEntries) {
+  for (const downloadUrl of downloadUrls) {
+    const key = getKey(downloadUrl);
+    if (key === undefined) {
+      continue;
+    }
+    const checksum = await getOrDownloadChecksum(key, downloadUrl);
    if (!firstLine) {
      await fs.appendFile(filePath, ",\n");
    }
-    await fs.appendFile(filePath, `  "${entry.key}":\n    "${entry.checksum}"`);
+    await fs.appendFile(filePath, `  "${key}":\n    "${checksum}"`);
    firstLine = false;
  }
  await fs.appendFile(filePath, ",\n};\n");
 }
+
+function getKey(downloadUrl: string): string | undefined {
+  // https://github.com/astral-sh/uv/releases/download/0.3.2/uv-aarch64-apple-darwin.tar.gz.sha256
+  const parts = downloadUrl.split("/");
+  const fileName = parts[parts.length - 1];
+  if (fileName.startsWith("source")) {
+    return undefined;
+  }
+  const name = fileName.split(".")[0].split("uv-")[1];
+  const version = parts[parts.length - 2];
+  return `${name}-${version}`;
+}
+
+async function getOrDownloadChecksum(
+  key: string,
+  downloadUrl: string,
+): Promise<string> {
+  let checksum = "";
+  if (key in KNOWN_CHECKSUMS) {
+    checksum = KNOWN_CHECKSUMS[key];
+  } else {
+    const content = await downloadAssetContent(downloadUrl);
+    checksum = content.split(" ")[0].trim();
+  }
+  return checksum;
+}
+
+async function downloadAssetContent(downloadUrl: string): Promise<string> {
+  const downloadPath = await tc.downloadTool(downloadUrl);
+  const content = await fs.readFile(downloadPath, "utf8");
+  return content;
+}
--- a/src/download/download-version.ts
+++ b/src/download/download-version.ts
@@ -2,20 +2,20 @@ import { promises as fs } from "node:fs";
 import * as path from "node:path";
 import * as core from "@actions/core";
 import * as tc from "@actions/tool-cache";
+import type { Endpoints } from "@octokit/types";
 import * as pep440 from "@renovatebot/pep440";
 import * as semver from "semver";
 import { OWNER, REPO, TOOL_CACHE_NAME } from "../utils/constants";
+import { Octokit } from "../utils/octokit";
 import type { Architecture, Platform } from "../utils/platforms";
 import { validateChecksum } from "./checksum/checksum";
 import {
+  getDownloadUrl,
  getLatestKnownVersion as getLatestVersionInManifest,
-  getDownloadUrl as getManifestDownloadUrl,
 } from "./version-manifest";
-import {
-  getAllVersions,
-  getArtifact,
-  getLatestVersion as getLatestVersionFromNdjson,
-} from "./versions-client";
+
+type Release =
+  Endpoints["GET /repos/{owner}/{repo}/releases"]["response"]["data"][number];

 export function tryGetFromToolCache(
  arch: Architecture,
@@ -32,7 +32,7 @@ export function tryGetFromToolCache(
  return { installedPath, version: resolvedVersion };
 }

-export async function downloadVersionFromNdjson(
+export async function downloadVersionFromGithub(
  platform: Platform,
  arch: Architecture,
  version: string,
@@ -41,14 +41,7 @@ export async function downloadVersionFromNdjson(
 ): Promise<{ version: string; cachedToolDir: string }> {
  const artifact = `uv-${arch}-${platform}`;
  const extension = getExtension(platform);
-
-  // Get artifact info from NDJSON (includes URL and checksum)
-  const artifactInfo = await getArtifact(version, arch, platform);
-
-  const downloadUrl =
-    artifactInfo?.url ??
-    `https://github.com/${OWNER}/${REPO}/releases/download/${version}/${artifact}${extension}`;
-
+  const downloadUrl = `https://github.com/${OWNER}/${REPO}/releases/download/${version}/${artifact}${extension}`;
  return await downloadVersion(
    downloadUrl,
    artifact,
@@ -57,30 +50,35 @@ export async function downloadVersionFromNdjson(
    version,
    checkSum,
    githubToken,
-    artifactInfo?.sha256,
  );
 }

 export async function downloadVersionFromManifest(
-  manifestUrl: string,
+  manifestUrl: string | undefined,
  platform: Platform,
  arch: Architecture,
  version: string,
  checkSum: string | undefined,
  githubToken: string,
 ): Promise<{ version: string; cachedToolDir: string }> {
-  const downloadUrl = await getManifestDownloadUrl(
+  const downloadUrl = await getDownloadUrl(
    manifestUrl,
    version,
    arch,
    platform,
  );
  if (!downloadUrl) {
-    throw new Error(
-      `manifest-file does not contain version ${version}, arch ${arch}, platform ${platform}.`,
+    core.info(
+      `manifest-file does not contain version ${version}, arch ${arch}, platform ${platform}. Falling back to GitHub releases.`,
+    );
+    return await downloadVersionFromGithub(
+      platform,
+      arch,
+      version,
+      checkSum,
+      githubToken,
    );
  }
-
  return await downloadVersion(
    downloadUrl,
    `uv-${arch}-${platform}`,
@@ -89,7 +87,6 @@ export async function downloadVersionFromManifest(
    version,
    checkSum,
    githubToken,
-    undefined, // No NDJSON checksum for manifest downloads
  );
 }

@@ -101,7 +98,6 @@ async function downloadVersion(
  version: string,
  checkSum: string | undefined,
  githubToken: string,
-  ndjsonChecksum?: string,
 ): Promise<{ version: string; cachedToolDir: string }> {
  core.info(`Downloading uv from "${downloadUrl}" ...`);
  const downloadPath = await tc.downloadTool(
@@ -109,14 +105,7 @@ async function downloadVersion(
    undefined,
    githubToken,
  );
-  await validateChecksum(
-    checkSum,
-    downloadPath,
-    arch,
-    platform,
-    version,
-    ndjsonChecksum,
-  );
+  await validateChecksum(checkSum, downloadPath, arch, platform, version);

  let uvDir: string;
  if (platform === "pc-windows-msvc") {
@@ -154,6 +143,7 @@ function getExtension(platform: Platform): string {
 export async function resolveVersion(
  versionInput: string,
  manifestFile: string | undefined,
+  githubToken: string,
  resolutionStrategy: "highest" | "lowest" = "highest",
 ): Promise<string> {
  core.debug(`Resolving version: ${versionInput}`);
@@ -173,7 +163,7 @@ export async function resolveVersion(
  } else {
    version =
      versionInput === "latest" || resolveVersionSpecifierToLatest
-        ? await getLatestVersionFromNdjson()
+        ? await getLatestVersion(githubToken)
        : versionInput;
  }
  if (tc.isExplicitVersion(version)) {
@@ -185,7 +175,7 @@ export async function resolveVersion(
    }
    return version;
  }
-  const availableVersions = await getAvailableVersions();
+  const availableVersions = await getAvailableVersions(githubToken);
  core.debug(`Available versions: ${availableVersions}`);
  const resolvedVersion =
    resolutionStrategy === "lowest"
@@ -197,9 +187,79 @@ export async function resolveVersion(
  return resolvedVersion;
 }

-async function getAvailableVersions(): Promise<string[]> {
-  core.info("Getting available versions from NDJSON...");
-  return await getAllVersions();
+async function getAvailableVersions(githubToken: string): Promise<string[]> {
+  core.info("Getting available versions from GitHub API...");
+  try {
+    const octokit = new Octokit({
+      auth: githubToken,
+    });
+    return await getReleaseTagNames(octokit);
+  } catch (err) {
+    if ((err as Error).message.includes("Bad credentials")) {
+      core.info(
+        "No (valid) GitHub token provided. Falling back to anonymous. Requests might be rate limited.",
+      );
+      const octokit = new Octokit();
+      return await getReleaseTagNames(octokit);
+    }
+    throw err;
+  }
+}
+
+async function getReleaseTagNames(octokit: Octokit): Promise<string[]> {
+  const response: Release[] = await octokit.paginate(
+    octokit.rest.repos.listReleases,
+    {
+      owner: OWNER,
+      repo: REPO,
+    },
+  );
+  const releaseTagNames = response.map((release) => release.tag_name);
+  if (releaseTagNames.length === 0) {
+    throw Error(
+      "Github API request failed while getting releases. Check the GitHub status page for outages. Try again later.",
+    );
+  }
+  return releaseTagNames;
+}
+
+async function getLatestVersion(githubToken: string) {
+  core.info("Getting latest version from GitHub API...");
+  const octokit = new Octokit({
+    auth: githubToken,
+  });
+
+  let latestRelease: { tag_name: string } | undefined;
+  try {
+    latestRelease = await getLatestRelease(octokit);
+  } catch (err) {
+    if ((err as Error).message.includes("Bad credentials")) {
+      core.info(
+        "No (valid) GitHub token provided. Falling back to anonymous. Requests might be rate limited.",
+      );
+      const octokit = new Octokit();
+      latestRelease = await getLatestRelease(octokit);
+    } else {
+      core.error(
+        "Github API request failed while getting latest release. Check the GitHub status page for outages. Try again later.",
+      );
+      throw err;
+    }
+  }
+
+  if (!latestRelease) {
+    throw new Error("Could not determine latest release.");
+  }
+  core.debug(`Latest version: ${latestRelease.tag_name}`);
+  return latestRelease.tag_name;
+}
+
+async function getLatestRelease(octokit: Octokit) {
+  const { data: latestRelease } = await octokit.rest.repos.getLatestRelease({
+    owner: OWNER,
+    repo: REPO,
+  });
+  return latestRelease;
 }

 function maxSatisfying(
--- a/src/download/versions-client.ts
+++ b/src/download/versions-client.ts
@@ -1,113 +0,0 @@
-import * as core from "@actions/core";
-import { VERSIONS_NDJSON_URL } from "../utils/constants";
-import { fetch } from "../utils/fetch";
-
-export interface NdjsonArtifact {
-  platform: string;
-  variant: string;
-  url: string;
-  archive_format: string;
-  sha256: string;
-}
-
-export interface NdjsonVersion {
-  version: string;
-  artifacts: NdjsonArtifact[];
-}
-
-let cachedVersionData: NdjsonVersion[] | null = null;
-
-export async function fetchVersionData(): Promise<NdjsonVersion[]> {
-  if (cachedVersionData !== null) {
-    core.debug("Using cached NDJSON version data");
-    return cachedVersionData;
-  }
-
-  core.info(`Fetching version data from ${VERSIONS_NDJSON_URL}...`);
-  const response = await fetch(VERSIONS_NDJSON_URL, {});
-  if (!response.ok) {
-    throw new Error(
-      `Failed to fetch version data: ${response.status} ${response.statusText}`,
-    );
-  }
-
-  const body = await response.text();
-  const versions: NdjsonVersion[] = [];
-
-  for (const line of body.split("\n")) {
-    const trimmed = line.trim();
-    if (trimmed === "") {
-      continue;
-    }
-    try {
-      const version = JSON.parse(trimmed) as NdjsonVersion;
-      versions.push(version);
-    } catch {
-      core.debug(`Failed to parse NDJSON line: ${trimmed}`);
-    }
-  }
-
-  if (versions.length === 0) {
-    throw new Error("No version data found in NDJSON file");
-  }
-
-  cachedVersionData = versions;
-  return versions;
-}
-
-export async function getLatestVersion(): Promise<string> {
-  const versions = await fetchVersionData();
-  // The NDJSON file lists versions in order, newest first
-  const latestVersion = versions[0]?.version;
-  if (!latestVersion) {
-    throw new Error("No versions found in NDJSON data");
-  }
-  core.debug(`Latest version from NDJSON: ${latestVersion}`);
-  return latestVersion;
-}
-
-export async function getAllVersions(): Promise<string[]> {
-  const versions = await fetchVersionData();
-  return versions.map((v) => v.version);
-}
-
-export interface ArtifactResult {
-  url: string;
-  sha256: string;
-}
-
-export async function getArtifact(
-  version: string,
-  arch: string,
-  platform: string,
-): Promise<ArtifactResult | undefined> {
-  const versions = await fetchVersionData();
-  const versionData = versions.find((v) => v.version === version);
-  if (!versionData) {
-    core.debug(`Version ${version} not found in NDJSON data`);
-    return undefined;
-  }
-
-  // The NDJSON artifact platform format is like "x86_64-apple-darwin"
-  // We need to match against arch-platform
-  const targetPlatform = `${arch}-${platform}`;
-  const artifact = versionData.artifacts.find(
-    (a) => a.platform === targetPlatform,
-  );
-
-  if (!artifact) {
-    core.debug(
-      `Artifact for ${targetPlatform} not found in version ${version}. Available platforms: ${versionData.artifacts.map((a) => a.platform).join(", ")}`,
-    );
-    return undefined;
-  }
-
-  return {
-    sha256: artifact.sha256,
-    url: artifact.url,
-  };
-}
-
-export function clearCache(): void {
-  cachedVersionData = null;
-}
--- a/src/save-cache.ts
+++ b/src/save-cache.ts
@@ -6,7 +6,6 @@ import * as pep440 from "@renovatebot/pep440";
 import {
  STATE_CACHE_KEY,
  STATE_CACHE_MATCHED_KEY,
-  STATE_PYTHON_CACHE_MATCHED_KEY,
 } from "./cache/restore-cache";
 import { STATE_UV_PATH, STATE_UV_VERSION } from "./utils/constants";
 import {
@@ -53,30 +52,63 @@ async function saveCache(): Promise<void> {
  }
  if (matchedKey === cacheKey) {
    core.info(`Cache hit occurred on key ${cacheKey}, not saving cache.`);
-  } else {
-    if (shouldPruneCache) {
-      await pruneCache();
-    }
+    return;
+  }

-    const actualCachePath = getUvCachePath();
-    await saveCacheToKey(
-      cacheKey,
-      actualCachePath,
-      STATE_CACHE_MATCHED_KEY,
-      "uv cache",
+  if (shouldPruneCache) {
+    await pruneCache();
+  }
+
+  if (cacheLocalPath === undefined) {
+    throw new Error(
+      "cache-local-path is not set. Cannot save cache without a valid cache path.",
+    );
+  }
+  let actualCachePath = cacheLocalPath.path;
+  if (
+    process.env.UV_CACHE_DIR &&
+    process.env.UV_CACHE_DIR !== cacheLocalPath.path
+  ) {
+    core.warning(
+      `The environment variable UV_CACHE_DIR has been changed to "${process.env.UV_CACHE_DIR}", by an action or step running after astral-sh/setup-uv. This can lead to unexpected behavior. If you expected this to happen set the cache-local-path input to "${process.env.UV_CACHE_DIR}" instead of "${cacheLocalPath.path}".`,
+    );
+    actualCachePath = process.env.UV_CACHE_DIR;
+  }
+
+  core.info(`Saving cache path: ${actualCachePath}`);
+  if (!fs.existsSync(actualCachePath) && !ignoreNothingToCache) {
+    throw new Error(
      `Cache path ${actualCachePath} does not exist on disk. This likely indicates that there are no dependencies to cache. Consider disabling the cache input if it is not needed.`,
    );
  }

+  const cachePaths = [actualCachePath];
  if (cachePython) {
-    const pythonCacheKey = `${cacheKey}-python`;
-    await saveCacheToKey(
-      pythonCacheKey,
-      pythonDir,
-      STATE_PYTHON_CACHE_MATCHED_KEY,
-      "Python cache",
-      `Python cache path ${pythonDir} does not exist on disk. This likely indicates that there are no Python installations to cache. Consider disabling the cache input if it is not needed.`,
-    );
+    core.info(`Including Python cache path: ${pythonDir}`);
+    if (!fs.existsSync(pythonDir) && !ignoreNothingToCache) {
+      throw new Error(
+        `Python cache path ${pythonDir} does not exist on disk. This likely indicates that there are no dependencies to cache. Consider disabling the cache input if it is not needed.`,
+      );
+    }
+    cachePaths.push(pythonDir);
+  }
+
+  core.info(`Final cache paths: ${cachePaths.join(", ")}`);
+  try {
+    await cache.saveCache(cachePaths, cacheKey);
+    core.info(`cache saved with the key: ${cacheKey}`);
+  } catch (e) {
+    if (
+      e instanceof Error &&
+      e.message ===
+        "Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved."
+    ) {
+      core.info(
+        "No cacheable paths were found. Ignoring because ignore-nothing-to-save is enabled.",
+      );
+    } else {
+      throw e;
+    }
  }
 }

@@ -96,61 +128,4 @@ async function pruneCache(): Promise<void> {
  await exec.exec(uvPath, execArgs, options);
 }

-function getUvCachePath(): string {
-  if (cacheLocalPath === undefined) {
-    throw new Error(
-      "cache-local-path is not set. Cannot save cache without a valid cache path.",
-    );
-  }
-  if (
-    process.env.UV_CACHE_DIR &&
-    process.env.UV_CACHE_DIR !== cacheLocalPath.path
-  ) {
-    core.warning(
-      `The environment variable UV_CACHE_DIR has been changed to "${process.env.UV_CACHE_DIR}", by an action or step running after astral-sh/setup-uv. This can lead to unexpected behavior. If you expected this to happen set the cache-local-path input to "${process.env.UV_CACHE_DIR}" instead of "${cacheLocalPath.path}".`,
-    );
-    return process.env.UV_CACHE_DIR;
-  }
-  return cacheLocalPath.path;
-}
-
-async function saveCacheToKey(
-  cacheKey: string,
-  cachePath: string,
-  stateKey: string,
-  cacheName: string,
-  pathNotExistErrorMessage: string,
-): Promise<void> {
-  const matchedKey = core.getState(stateKey);
-
-  if (matchedKey === cacheKey) {
-    core.info(
-      `${cacheName} hit occurred on key ${cacheKey}, not saving cache.`,
-    );
-    return;
-  }
-
-  core.info(`Including ${cacheName} path: ${cachePath}`);
-  if (!fs.existsSync(cachePath) && !ignoreNothingToCache) {
-    throw new Error(pathNotExistErrorMessage);
-  }
-
-  try {
-    await cache.saveCache([cachePath], cacheKey);
-    core.info(`${cacheName} saved with key: ${cacheKey}`);
-  } catch (e) {
-    if (
-      e instanceof Error &&
-      e.message ===
-        "Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved."
-    ) {
-      core.info(
-        `No cacheable ${cacheName} paths were found. Ignoring because ignore-nothing-to-save is enabled.`,
-      );
-    } else {
-      throw e;
-    }
-  }
-}
-
 run();
--- a/src/setup-uv.ts
+++ b/src/setup-uv.ts
@@ -5,7 +5,6 @@ import * as exec from "@actions/exec";
 import { restoreCache } from "./cache/restore-cache";
 import {
  downloadVersionFromManifest,
-  downloadVersionFromNdjson,
  resolveVersion,
  tryGetFromToolCache,
 } from "./download/download-version";
@@ -37,37 +36,6 @@ import {
 } from "./utils/platforms";
 import { getUvVersionFromFile } from "./version/resolve";

-async function getPythonVersion(): Promise<string> {
-  if (pythonVersion !== "") {
-    return pythonVersion;
-  }
-
-  let output = "";
-  const options: exec.ExecOptions = {
-    listeners: {
-      stdout: (data: Buffer) => {
-        output += data.toString();
-      },
-    },
-    silent: !core.isDebug(),
-  };
-
-  try {
-    const execArgs = ["python", "find", "--directory", workingDirectory];
-    await exec.exec("uv", execArgs, options);
-    const pythonPath = output.trim();
-
-    output = "";
-    await exec.exec(pythonPath, ["--version"], options);
-    // output is like "Python 3.8.10"
-    return output.split(" ")[1].trim();
-  } catch (error) {
-    const err = error as Error;
-    core.debug(`Failed to get python version from uv. Error: ${err.message}`);
-    return "unknown";
-  }
-}
-
 async function run(): Promise<void> {
  detectEmptyWorkdir();
  const platform = await getPlatform();
@@ -95,11 +63,8 @@ async function run(): Promise<void> {
    core.saveState(STATE_UV_VERSION, setupResult.version);
    core.info(`Successfully installed uv version ${setupResult.version}`);

-    const pythonVersion = await getPythonVersion();
-    core.setOutput("python-version", pythonVersion);
-
    if (enableCache) {
-      await restoreCache(pythonVersion);
+      await restoreCache();
    }
    // https://github.com/nodejs/node/issues/56645#issuecomment-3077594952
    await new Promise((resolve) => setTimeout(resolve, 50));
@@ -139,23 +104,14 @@ async function setupUv(
    };
  }

-  // Use the same source for download as we used for version resolution
-  const downloadVersionResult = manifestFile
-    ? await downloadVersionFromManifest(
-        manifestFile,
-        platform,
-        arch,
-        resolvedVersion,
-        checkSum,
-        githubToken,
-      )
-    : await downloadVersionFromNdjson(
-        platform,
-        arch,
-        resolvedVersion,
-        checkSum,
-        githubToken,
-      );
+  const downloadVersionResult = await downloadVersionFromManifest(
+    manifestFile,
+    platform,
+    arch,
+    resolvedVersion,
+    checkSum,
+    githubToken,
+  );

  return {
    uvDir: downloadVersionResult.cachedToolDir,
@@ -167,7 +123,12 @@ async function determineVersion(
  manifestFile: string | undefined,
 ): Promise<string> {
  if (versionInput !== "") {
-    return await resolveVersion(versionInput, manifestFile, resolutionStrategy);
+    return await resolveVersion(
+      versionInput,
+      manifestFile,
+      githubToken,
+      resolutionStrategy,
+    );
  }
  if (versionFileInput !== "") {
    const versionFromFile = getUvVersionFromFile(versionFileInput);
@@ -179,6 +140,7 @@ async function determineVersion(
    return await resolveVersion(
      versionFromFile,
      manifestFile,
+      githubToken,
      resolutionStrategy,
    );
  }
@@ -196,6 +158,7 @@ async function determineVersion(
  return await resolveVersion(
    versionFromUvToml || versionFromPyproject || "latest",
    manifestFile,
+    githubToken,
    resolutionStrategy,
  );
 }
--- a/src/update-known-versions.ts
+++ b/src/update-known-versions.ts
@@ -1,116 +1,63 @@
-import { promises as fs } from "node:fs";
 import * as core from "@actions/core";
+import type { Endpoints } from "@octokit/types";
 import * as semver from "semver";
 import { updateChecksums } from "./download/checksum/update-known-checksums";
-import { getLatestKnownVersion } from "./download/version-manifest";
 import {
-  fetchVersionData,
-  getLatestVersion,
-  type NdjsonVersion,
-} from "./download/versions-client";
+  getLatestKnownVersion,
+  updateVersionManifest,
+} from "./download/version-manifest";
+import { OWNER, REPO } from "./utils/constants";
+import { Octokit } from "./utils/octokit";

-interface ChecksumEntry {
-  key: string;
-  checksum: string;
-}
-
-interface ArtifactEntry {
-  version: string;
-  artifactName: string;
-  arch: string;
-  platform: string;
-  downloadUrl: string;
-}
-
-function extractChecksumsFromNdjson(
-  versions: NdjsonVersion[],
-): ChecksumEntry[] {
-  const checksums: ChecksumEntry[] = [];
-
-  for (const version of versions) {
-    for (const artifact of version.artifacts) {
-      // The platform field contains the target triple like "x86_64-apple-darwin"
-      const key = `${artifact.platform}-${version.version}`;
-      checksums.push({
-        checksum: artifact.sha256,
-        key,
-      });
-    }
-  }
-
-  return checksums;
-}
-
-function extractArtifactsFromNdjson(
-  versions: NdjsonVersion[],
-): ArtifactEntry[] {
-  const artifacts: ArtifactEntry[] = [];
-
-  for (const version of versions) {
-    for (const artifact of version.artifacts) {
-      // The platform field contains the target triple like "x86_64-apple-darwin"
-      // Split into arch and platform (e.g., "x86_64-apple-darwin" -> ["x86_64", "apple-darwin"])
-      const parts = artifact.platform.split("-");
-      const arch = parts[0];
-      const platform = parts.slice(1).join("-");
-
-      // Construct artifact name from platform and archive format
-      const artifactName = `uv-${artifact.platform}.${artifact.archive_format}`;
-
-      artifacts.push({
-        arch,
-        artifactName,
-        downloadUrl: artifact.url,
-        platform,
-        version: version.version,
-      });
-    }
-  }
-
-  return artifacts;
-}
+type Release =
+  Endpoints["GET /repos/{owner}/{repo}/releases"]["response"]["data"][number];

 async function run(): Promise<void> {
  const checksumFilePath = process.argv.slice(2)[0];
  const versionsManifestFile = process.argv.slice(2)[1];
+  const githubToken = process.argv.slice(2)[2];
+
+  const octokit = new Octokit({
+    auth: githubToken,
+  });
+
+  const { data: latestRelease } = await octokit.rest.repos.getLatestRelease({
+    owner: OWNER,
+    repo: REPO,
+  });

-  const latestVersion = await getLatestVersion();
  const latestKnownVersion = await getLatestKnownVersion(undefined);

-  if (semver.lte(latestVersion, latestKnownVersion)) {
+  if (semver.lte(latestRelease.tag_name, latestKnownVersion)) {
    core.info(
-      `Latest release (${latestVersion}) is not newer than the latest known version (${latestKnownVersion}). Skipping update.`,
+      `Latest release (${latestRelease.tag_name}) is not newer than the latest known version (${latestKnownVersion}). Skipping update.`,
    );
    return;
  }

-  const versions = await fetchVersionData();
+  const releases: Release[] = await octokit.paginate(
+    octokit.rest.repos.listReleases,
+    {
+      owner: OWNER,
+      repo: REPO,
+    },
+  );
+  const checksumDownloadUrls: string[] = releases.flatMap((release) =>
+    release.assets
+      .filter((asset) => asset.name.endsWith(".sha256"))
+      .map((asset) => asset.browser_download_url),
+  );
+  await updateChecksums(checksumFilePath, checksumDownloadUrls);

-  // Extract checksums from NDJSON
-  const checksumEntries = extractChecksumsFromNdjson(versions);
-  await updateChecksums(checksumFilePath, checksumEntries);
+  const artifactDownloadUrls: string[] = releases.flatMap((release) =>
+    release.assets
+      .filter((asset) => !asset.name.endsWith(".sha256"))
+      .map((asset) => asset.browser_download_url),
+  );

-  // Extract artifact URLs for version manifest
-  const artifactEntries = extractArtifactsFromNdjson(versions);
-  await updateVersionManifestFromEntries(versionsManifestFile, artifactEntries);
+  await updateVersionManifest(versionsManifestFile, artifactDownloadUrls);

-  core.setOutput("latest-version", latestVersion);
-}
-
-async function updateVersionManifestFromEntries(
-  filePath: string,
-  entries: ArtifactEntry[],
-): Promise<void> {
-  const manifest = entries.map((entry) => ({
-    arch: entry.arch,
-    artifactName: entry.artifactName,
-    downloadUrl: entry.downloadUrl,
-    platform: entry.platform,
-    version: entry.version,
-  }));
-
-  core.debug(`Updating manifest-file: ${JSON.stringify(manifest)}`);
-  await fs.writeFile(filePath, JSON.stringify(manifest));
+  core.setOutput("latest-version", latestRelease.tag_name);
 }

 run();
--- a/src/utils/constants.ts
+++ b/src/utils/constants.ts
@@ -3,5 +3,3 @@ export const OWNER = "astral-sh";
 export const TOOL_CACHE_NAME = "uv";
 export const STATE_UV_PATH = "uv-path";
 export const STATE_UV_VERSION = "uv-version";
-export const VERSIONS_NDJSON_URL =
-  "https://raw.githubusercontent.com/astral-sh/versions/main/v1/uv.ndjson";
--- a/src/utils/inputs.ts
+++ b/src/utils/inputs.ts
@@ -155,7 +155,7 @@ function getCacheDirFromConfig(): string | undefined {
 export function getUvPythonDir(): string {
  if (process.env.UV_PYTHON_INSTALL_DIR !== undefined) {
    core.info(
-      `UV_PYTHON_INSTALL_DIR is already set to ${process.env.UV_PYTHON_INSTALL_DIR}`,
+      `UV_PYTHON_INSTALL_DIR is already set to  ${process.env.UV_PYTHON_INSTALL_DIR}`,
    );
    return process.env.UV_PYTHON_INSTALL_DIR;
  }
--- a/src/utils/octokit.ts
+++ b/src/utils/octokit.ts
@@ -0,0 +1,34 @@
+import type { OctokitOptions } from "@octokit/core";
+import { Octokit as Core } from "@octokit/core";
+import {
+  type PaginateInterface,
+  paginateRest,
+} from "@octokit/plugin-paginate-rest";
+import { legacyRestEndpointMethods } from "@octokit/plugin-rest-endpoint-methods";
+import { fetch as customFetch } from "./fetch";
+
+export type { RestEndpointMethodTypes } from "@octokit/plugin-rest-endpoint-methods";
+
+const DEFAULTS = {
+  baseUrl: "https://api.github.com",
+  userAgent: "setup-uv",
+};
+
+const OctokitWithPlugins = Core.plugin(paginateRest, legacyRestEndpointMethods);
+
+export const Octokit = OctokitWithPlugins.defaults(function buildDefaults(
+  options: OctokitOptions,
+): OctokitOptions {
+  return {
+    ...DEFAULTS,
+    ...options,
+    request: {
+      fetch: customFetch,
+      ...options.request,
+    },
+  };
+});
+
+export type Octokit = InstanceType<typeof OctokitWithPlugins> & {
+  paginate: PaginateInterface;
+};
--- a/src/utils/platforms.ts
+++ b/src/utils/platforms.ts
@@ -1,5 +1,3 @@
-import fs from "node:fs";
-import os from "node:os";
 import * as core from "@actions/core";
 import * as exec from "@actions/exec";
 export type Platform =
@@ -76,71 +74,3 @@ async function isMuslOs(): Promise<boolean> {
    return false;
  }
 }
-
-/**
- * Returns OS name and version for cache key differentiation.
- * Examples: "ubuntu-22.04", "macos-14", "windows-2022"
- * Throws if OS detection fails.
- */
-export function getOSNameVersion(): string {
-  const platform = process.platform;
-
-  if (platform === "linux") {
-    return getLinuxOSNameVersion();
-  }
-  if (platform === "darwin") {
-    return getMacOSNameVersion();
-  }
-  if (platform === "win32") {
-    return getWindowsNameVersion();
-  }
-
-  throw new Error(`Unsupported platform: ${platform}`);
-}
-
-function getLinuxOSNameVersion(): string {
-  const files = ["/etc/os-release", "/usr/lib/os-release"];
-
-  for (const file of files) {
-    try {
-      const content = fs.readFileSync(file, "utf8");
-      const id = parseOsReleaseValue(content, "ID");
-      const versionId = parseOsReleaseValue(content, "VERSION_ID");
-
-      if (id && versionId) {
-        return `${id}-${versionId}`;
-      }
-    } catch {
-      // Try next file
-    }
-  }
-
-  throw new Error(
-    "Failed to determine Linux distribution. " +
-      "Could not read /etc/os-release or /usr/lib/os-release",
-  );
-}
-
-function parseOsReleaseValue(content: string, key: string): string | undefined {
-  const regex = new RegExp(`^${key}=["']?([^"'\\n]*)["']?$`, "m");
-  const match = content.match(regex);
-  return match?.[1];
-}
-
-function getMacOSNameVersion(): string {
-  const darwinVersion = Number.parseInt(os.release().split(".")[0], 10);
-  if (Number.isNaN(darwinVersion)) {
-    throw new Error(`Failed to parse macOS version from: ${os.release()}`);
-  }
-  const macosVersion = darwinVersion - 9;
-  return `macos-${macosVersion}`;
-}
-
-function getWindowsNameVersion(): string {
-  const version = os.version();
-  const match = version.match(/Windows(?: Server)? (\d+)/);
-  if (!match) {
-    throw new Error(`Failed to parse Windows version from: ${version}`);
-  }
-  return `windows-${match[1]}`;
-}
--- a/version-manifest.json
+++ b/version-manifest.json