diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index dd92070b10..d3bdb52e69 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,49 +23,15 @@ jobs:
     - name: Lint
       run: bundle exec rake lint
 
-  template:
-    runs-on: ubuntu-latest
-    env:
-      BUNDLE_GEMFILE: gemfiles/2.7/Gemfile
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: "2.7.0"
-        bundler-cache: true
-    - name: Generate templates
-      run: bundle exec rake templates
-      env:
-        LANG: "C"
-
-  typecheck:
-    runs-on: ubuntu-latest
-    env:
-      BUNDLE_GEMFILE: gemfiles/typecheck/Gemfile
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: "3.4"
-        bundler-cache: true
-    - name: Check Sorbet
-      run: bundle exec rake typecheck:tapioca typecheck:sorbet
-    - name: Check Steep
-      run: bundle exec rake typecheck:steep
-    - name: Check field kinds
-      run: rm lib/prism/node.rb && CHECK_FIELD_KIND=true bundle exec rake
-
   build:
     strategy:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-latest
-          - ubuntu-24.04-arm
-          - macos-latest
-          # - windows-latest <-- failing with fiddle error, temporarily disabled
+          # - ubuntu-latest
+          # - ubuntu-24.04-arm
+          # - macos-latest
+          - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v5
@@ -73,278 +39,10 @@ jobs:
       uses: ruby/setup-ruby@v1
       with:
         ruby-version: head
-        bundler-cache: true
+    
+    - run: cat D:/rubyinstaller-head-x64/lib/ruby/3.5.0+4/win32/resolv.rb
+    
+    - run: bundle install
     - name: Run Ruby tests
       run: bundle exec rake
       shell: bash
-
-  build-ibm:
-    if: github.repository == 'ruby/prism'
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-24.04-ppc64le
-          - ubuntu-24.04-s390x
-    runs-on: ${{ matrix.os }}
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      run: |
-        sudo apt-get update
-        sudo apt-get install ruby-full bundler libyaml-dev
-    - name: Install dependencies
-      run: sudo bundle install --jobs $(nproc)
-    - name: Run Ruby tests
-      run: bundle exec rake
-      shell: bash
-
-  build-ffi:
-    strategy:
-      fail-fast: false
-      matrix:
-        target:
-          - { ruby: "head", gemfile: "3.5" }
-          - { ruby: "jruby-10.0.0.0", gemfile: "jruby" } # https://github.com/jruby/jruby/issues/8923
-          - { ruby: "truffleruby", gemfile: "truffleruby" }
-    runs-on: ubuntu-latest
-    env:
-      PRISM_FFI_BACKEND: "true"
-      BUNDLE_GEMFILE: gemfiles/${{ matrix.target.gemfile }}/Gemfile
-    steps:
-      - uses: actions/checkout@v5
-      - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ${{ matrix.target.ruby }}
-          bundler-cache: true
-      - name: Run Ruby tests
-        run: bundle exec rake
-
-  build-without-assertions:
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-22.04, ubuntu-24.04]
-    runs-on: ${{ matrix.os }}
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - name: Run Ruby tests
-      run: bundle exec rake compile_no_debug test
-
-  build-debug:
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-latest
-          - ubuntu-24.04-arm
-          - macos-latest
-          # - windows-latest <-- failing with fiddle error, temporarily disabled
-    runs-on: ${{ matrix.os }}
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - name: Run Ruby tests
-      run: bundle exec rake
-      env:
-        PRISM_BUILD_DEBUG: "1"
-
-  build-minimal:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - name: Run Ruby tests
-      run: bundle exec rake compile_minimal test
-      env:
-        PRISM_BUILD_MINIMAL: "1"
-
-  build-java:
-    runs-on: ubuntu-latest
-    env:
-      JRUBY_OPTS: "--dev"
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up JRuby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: jruby
-        bundler-cache: true
-    - name: Run Java Loader test
-      run: PRISM_SERIALIZE_ONLY_SEMANTICS_FIELDS=1 JRUBY_OPTS="-J-ea" bundle exec rake test:java_loader
-
-  lex-ruby:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - name: Lex ruby/ruby
-      run: bundle exec rake lex:ruby
-
-  lex-discourse:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - name: Lex discourse/discourse
-      run: bundle exec rake lex:discourse
-
-  lex-top-100:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - name: Lex Top 100 Gems
-      run: bundle exec rake lex:topgems
-    - name: Parse Top 100 Gems
-      run: bundle exec rake parse:topgems
-    - name: Serialized size stats with all fields
-      run: bundle exec rake serialized_size:topgems
-    - name: Recompile with only semantic fields
-      run: PRISM_SERIALIZE_ONLY_SEMANTICS_FIELDS=1 bundle exec rake clobber compile
-    - name: Serialized size stats with only semantic fields
-      run: bundle exec rake serialized_size:topgems
-
-  memcheck:
-    runs-on: ubuntu-24.04
-    steps:
-    - uses: actions/checkout@v5
-    - name: Install valgrind
-      run: |
-        sudo apt-get update
-        sudo apt-get install -y valgrind
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - name: Run Ruby tests with valgrind
-      run: bundle exec rake test:valgrind
-
-  gem-package:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v5
-    - uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - run: bundle config --local frozen false
-    - run: bundle exec rake build:dev
-    - uses: actions/upload-artifact@v5
-      with:
-        name: gem-package
-        path: pkg
-        retention-days: 1
-
-  gem-install:
-    needs: ["gem-package"]
-    strategy:
-      fail-fast: false
-      matrix:
-        target:
-          - { ruby: "2.7", os: "ubuntu-latest", gemfile: "2.7" }
-          - { ruby: "3.0", os: "ubuntu-latest", gemfile: "3.0" }
-          - { ruby: "3.1", os: "ubuntu-latest", gemfile: "3.1" }
-          - { ruby: "3.2", os: "ubuntu-latest", gemfile: "3.2" }
-          - { ruby: "3.3", os: "ubuntu-latest", gemfile: "3.3" }
-          - { ruby: "3.4", os: "ubuntu-latest", gemfile: "3.4" }
-          - { ruby: "head", os: "ubuntu-latest", gemfile: "3.5" }
-          - { ruby: "jruby-10.0.0.0", os: "ubuntu-latest", gemfile: "jruby" } # https://github.com/jruby/jruby/issues/8923
-          - { ruby: "truffleruby", os: "ubuntu-latest", gemfile: "truffleruby" }
-
-          - { ruby: "2.7", os: "macos-latest", gemfile: "2.7" }
-          - { ruby: "3.0", os: "macos-latest", gemfile: "3.0" }
-          - { ruby: "3.1", os: "macos-latest", gemfile: "3.1" }
-          - { ruby: "3.2", os: "macos-latest", gemfile: "3.2" }
-          - { ruby: "3.3", os: "macos-latest", gemfile: "3.3" }
-          - { ruby: "3.4", os: "macos-latest", gemfile: "3.4" }
-          - { ruby: "head", os: "macos-latest", gemfile: "3.5" }
-          - { ruby: "jruby-10.0.0.0", os: "macos-latest", gemfile: "jruby" } # https://github.com/jruby/jruby/issues/8923
-          - { ruby: "truffleruby", os: "macos-latest", gemfile: "truffleruby" }
-
-          - { ruby: "2.7", os: "windows-latest", gemfile: "2.7" }
-          - { ruby: "3.0", os: "windows-latest", gemfile: "3.0" }
-          - { ruby: "3.1", os: "windows-latest", gemfile: "3.1" }
-          - { ruby: "3.2", os: "windows-latest", gemfile: "3.2" }
-          - { ruby: "3.3", os: "windows-latest", gemfile: "3.3" }
-          - { ruby: "3.4", os: "windows-latest", gemfile: "3.4" }
-          - { ruby: "head", os: "windows-latest", gemfile: "3.5" }
-          - { ruby: "jruby-10.0.0.0", os: "windows-latest", gemfile: "jruby" } # https://github.com/jruby/jruby/issues/8923
-    env:
-      BUNDLE_GEMFILE: gemfiles/${{ matrix.target.gemfile }}/Gemfile
-    runs-on: ${{ matrix.target.os }}
-    steps:
-    - uses: actions/checkout@v5
-    - uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: ${{ matrix.target.ruby }}
-    - uses: actions/download-artifact@v6
-      with:
-        name: gem-package
-        path: pkg
-    - run: |
-        gem install --local pkg/prism-*.gem
-        gem list -d prism
-      shell: bash
-    - name: Run tests
-      run: |
-        bundle install
-        rm -rf lib ext # ensure we don't use the local files
-        rake test
-      shell: bash
-
-  gcc-analyzer:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - name: Run build with gcc-analyzer enabled
-      run: |
-        CFLAGS='-fanalyzer' bundle exec rake compile
-
-  clang-analyzer:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: head
-        bundler-cache: true
-    - name: Install clang-analyzer
-      run: sudo apt-get install -y clang-tools
-    - name: Run build with clang-analyzer
-      run: |
-        scan-build bundle exec rake compile 2>&1 | tee /tmp/scan_build_output.log
-        grep -q 'scan-build: No bugs found.' /tmp/scan_build_output.log