diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7e7a8f1934..bdbd07bd99 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,8 +17,18 @@ on:
     inputs:
       nodejs-version:
         description: 'Node.js version to use (e.g., 24.0.0-rc.1)'
-        required: true
+        required: false
         type: string
+      use-npm-registry:
+        description: 'Use npm registry (https://registry.npmjs.org/)'
+        required: false
+        type: boolean
+        default: false
+      runner-label:
+        description: 'Runner label to use for jobs'
+        required: false
+        type: string
+        default: 'tenki-standard-autoscale'
 
 # This allows a subsequently queued workflow run to interrupt previous runs
 concurrency:
@@ -31,8 +41,8 @@ permissions:
 jobs:
   dependency-review:
       name: Dependency Review
-      if: github.event_name == 'pull_request'
-      runs-on: ubuntu-latest
+      # if: github.event_name == 'pull_request'
+      runs-on: ${{ inputs.runner-label || 'tenki-standard-autoscale' }}
       permissions:
         contents: read
       steps:
@@ -46,7 +56,7 @@ jobs:
 
   check-licenses:
     name: Check licenses
-    runs-on: ubuntu-latest
+    runs-on: ${{ inputs.runner-label || 'tenki-standard-autoscale' }}
     permissions:
       contents: read
     steps:
@@ -57,7 +67,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 'lts/*'
+          node-version: ${{ inputs.nodejs-version || 'lts/*' }}
           cache: 'npm'
           cache-dependency-path: package.json
           check-latest: true
@@ -65,6 +75,8 @@ jobs:
       - name: Install
         run: |
           npm install --ignore-scripts
+        env:
+          npm_config_registry: ${{ inputs.use-npm-registry && 'https://registry.npmjs.org/' || '' }}
 
       - name: Check licenses
         run: |
@@ -72,7 +84,7 @@ jobs:
 
   lint:
     name: Lint
-    runs-on: ubuntu-latest
+    runs-on: ${{ inputs.runner-label || 'tenki-standard-autoscale' }}
     permissions:
       contents: read
     steps:
@@ -83,7 +95,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 'lts/*'
+          node-version: ${{ inputs.nodejs-version || 'lts/*' }}
           cache: 'npm'
           cache-dependency-path: package.json
           check-latest: true
@@ -91,7 +103,9 @@ jobs:
       - name: Install
         run: |
           npm install --ignore-scripts
-
+        env:
+          npm_config_registry: ${{ inputs.use-npm-registry && 'https://registry.npmjs.org/' || '' }}
+          
       - name: Lint code
         run: |
           npm run lint
@@ -102,6 +116,9 @@ jobs:
     permissions:
       contents: read
     uses: ./.github/workflows/coverage-nix.yml
+    with:
+      use-npm-registry: ${{ inputs.use-npm-registry || false }}
+      runner-label: ${{ inputs.runner-label || 'tenki-standard-autoscale' }}
 
   coverage-win:
     needs:
@@ -109,6 +126,9 @@ jobs:
     permissions:
       contents: read
     uses: ./.github/workflows/coverage-win.yml
+    with:
+      use-npm-registry: ${{ inputs.use-npm-registry || false }}
+      runner-label: ${{ inputs.runner-label || 'tenki-standard-autoscale' }}
 
   test-unit:
     needs:
@@ -122,7 +142,8 @@ jobs:
     strategy:
       matrix:
         node-version: [20, 22, 24]
-        os: [macos-latest, ubuntu-latest, windows-latest]
+        os: ['${{ inputs.runner-label || ''tenki-standard-autoscale'' }}']
+        # os: [macos-latest, ${{ inputs.runner-label || 'tenki-standard-autoscale' }}, windows-latest]
 
     steps:
       - uses: actions/checkout@v4
@@ -140,6 +161,8 @@ jobs:
       - name: Install
         run: |
           npm install --ignore-scripts
+        env:
+          npm_config_registry: ${{ inputs.use-npm-registry && 'https://registry.npmjs.org/' || '' }}
 
       - name: Run tests
         run: |
@@ -147,8 +170,9 @@ jobs:
 
   # Useful for testing Release Candidates of Node.js
   test-unit-custom:
-    if: github.event_name == 'workflow_dispatch'
-    runs-on: ubuntu-latest
+    # if: github.event_name == 'workflow_dispatch'
+    if: ${{ inputs.nodejs-version != '' }}
+    runs-on: ${{ inputs.runner-label || 'tenki-standard-autoscale' }}
     permissions:
       contents: read
 
@@ -160,7 +184,7 @@ jobs:
       - name: Use Custom Node.js Version
         uses: actions/setup-node@v4
         with:
-          node-version: ${{ github.event.inputs.nodejs-version }}
+          node-version: ${{ inputs.nodejs-version }}
           cache: 'npm'
           cache-dependency-path: package.json
           check-latest: true
@@ -168,6 +192,8 @@ jobs:
       - name: Install
         run: |
           npm install --ignore-scripts
+        env:
+          npm_config_registry: ${{ inputs.use-npm-registry && 'https://registry.npmjs.org/' || '' }}
 
       - name: Run tests
         run: |
@@ -178,7 +204,7 @@ jobs:
       - lint
       - coverage-nix
       - coverage-win
-    runs-on: 'ubuntu-latest'
+    runs-on: ${{ inputs.runner-label || 'tenki-standard-autoscale' }}
     permissions:
       contents: read
 
@@ -197,6 +223,8 @@ jobs:
       - name: Install
         run: |
           npm install --ignore-scripts
+        env:
+          npm_config_registry: ${{ inputs.use-npm-registry && 'https://registry.npmjs.org/' || '' }}
 
       - name: Run typescript tests
         run: |
@@ -208,7 +236,7 @@ jobs:
     needs:
       - test-typescript
       - test-unit
-    runs-on: ubuntu-latest
+    runs-on: ${{ inputs.runner-label || 'tenki-standard-autoscale' }}
     permissions:
       contents: read
     steps:
@@ -218,40 +246,46 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 'lts/*'
+          node-version: ${{ inputs.nodejs-version || 'lts/*' }}
           cache: 'npm'
           cache-dependency-path: package.json
           check-latest: true
-      - name: install fastify
+      - name: Install
         run: |
           npm install --ignore-scripts
+        env:
+          npm_config_registry: ${{ inputs.use-npm-registry && 'https://registry.npmjs.org/' || '' }}
       - name: install webpack stack
         run: |
           cd test/bundler/webpack && npm install --ignore-scripts
+        env:
+          npm_config_registry: ${{ inputs.use-npm-registry && 'https://registry.npmjs.org/' || '' }}
       - name: Test webpack bundle
         run: |
           cd test/bundler/webpack && npm run test
       - name: install esbuild stack
         run: |
           cd test/bundler/esbuild && npm install --ignore-scripts
+        env:
+          npm_config_registry: ${{ inputs.use-npm-registry && 'https://registry.npmjs.org/' || '' }}
       - name: Test esbuild bundle
         run: |
           cd test/bundler/esbuild && npm run test
 
-  automerge:
-    if: >
-        github.event_name == 'pull_request' &&
-        github.event.pull_request.head.repo.full_name == github.repository &&
-        github.event.pull_request.user.login == 'dependabot[bot]'
-    needs:
-      - test-typescript
-      - test-unit
-      - package
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
-      contents: write
-    steps:
-      - uses: fastify/github-action-merge-dependabot@v3
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
+  # automerge:
+  #   if: >
+  #       github.event_name == 'pull_request' &&
+  #       github.event.pull_request.head.repo.full_name == github.repository &&
+  #       github.event.pull_request.user.login == 'dependabot[bot]'
+  #   needs:
+  #     - test-typescript
+  #     - test-unit
+  #     - package
+  #   runs-on: ${{ inputs.runner-label || 'tenki-standard-autoscale' }}
+  #   permissions:
+  #     pull-requests: write
+  #     contents: write
+  #   steps:
+  #     - uses: fastify/github-action-merge-dependabot@v3
+  #       with:
+  #         github-token: ${{ secrets.GITHUB_TOKEN }}