diff --git a/.github/workflows/prerelease.yml b/.github/workflows/prerelease.yml
new file mode 100644
index 00000000..9580b6c8
--- /dev/null
+++ b/.github/workflows/prerelease.yml
@@ -0,0 +1,174 @@
+name: CI-prerelease
+
+on:
+  push:
+    branches:
+      - prerelease
+    paths-ignore:
+      - "docs/**"
+      - ".vscode/**"
+      - ".github/**"
+      - "*.md"
+      - "**/*.md"
+  pull_request:
+    branches:
+      - prerelease
+  release:
+    branches:
+      - prerelease
+    types:
+      - released
+jobs:
+  build:
+    timeout-minutes: 10
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+    steps:
+      - uses: actions/checkout@v2
+      - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
+      - name: Set an output
+        id: set-version
+        if: runner.os == 'Linux'
+        run: |
+          set -x
+          VERSION=$(jq -r '.version' package.json | cut -d- -f1)
+          [ $GITHUB_EVENT_NAME == 'release' ] && VERSION=${{ github.event.release.tag_name }} && VERSION=${VERSION/v/}
+          CHANGELOG=$(cat CHANGELOG.md | sed -n "/## \[${VERSION}\]/,/## /p" | sed '/^$/d;1d;$d')
+          CHANGELOG="${CHANGELOG//$'\n'/'%0A'}"
+          echo ::set-output name=changelog::$CHANGELOG
+          git tag -l | cat
+          [ $GITHUB_EVENT_NAME == 'push' ] && VERSION+=-beta && VERSION+=.$(($(git tag -l "v$VERSION.*" | sort -nt. -k4 2>/dev/null | tail -1 | cut -d. -f4)+1))
+          [ $GITHUB_EVENT_NAME == 'pull_request' ] && VERSION+=-dev.${{ github.event.pull_request.number }}
+          echo ::set-output name=version::$VERSION
+          NAME=$(jq -r '.name' package.json)-$VERSION
+          echo ::set-output name=name::$NAME
+          tmp=$(mktemp)
+          jq --arg version "$VERSION" '.version = $version' package.json > "$tmp" && mv "$tmp" package.json
+          mkdir dist
+          echo $VERSION > .version
+          echo $NAME > .name
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.x
+      - run: npm install
+      - name: lint
+        if: runner.os == 'Linux'
+        run: npm run lint
+      - run: npm run compile
+      - name: npm test
+        uses: GabrielBB/xvfb-action@v1.0
+        with:
+          run: npm run test
+      - name: Build pre-release package
+        if: runner.os == 'Linux'
+        run: |
+          npx vsce package --pre-release -o ${{ steps.set-version.outputs.name }}.vsix
+      - uses: actions/upload-artifact@v2
+        if: runner.os == 'Linux'
+        with:
+          name: ${{ steps.set-version.outputs.name }}.vsix
+          path: ${{ steps.set-version.outputs.name }}.vsix
+      - uses: actions/upload-artifact@v2
+        if: runner.os == 'Linux'
+        with:
+          name: meta
+          path: |
+            .name
+            .version
+  beta:
+    if: (github.event_name == 'push')
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: meta
+          path: .
+      - name: Set an output
+        id: set-version
+        if: runner.os == 'Linux'
+        run: |
+          set -x
+          echo ::set-output name=version::`cat .version`
+          echo ::set-output name=name::`cat .name`
+      - uses: actions/download-artifact@v2
+        with:
+          name: ${{ steps.set-version.outputs.name }}.vsix
+      - name: Create Pre-Release
+        id: create_release
+        uses: actions/create-release@v1
+        if: runner.os == 'Linux'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: v${{ steps.set-version.outputs.version }}
+          release_name: v${{ steps.set-version.outputs.version }}
+          prerelease: ${{ github.event_name != 'release' }}
+          body: |
+            Changes in this pre-release
+            ${{ steps.set-version.outputs.changelog }}
+      - name: Upload Pre-Release Asset
+        id: upload-release-asset
+        uses: actions/upload-release-asset@v1
+        if: runner.os == 'Linux'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ${{ steps.set-version.outputs.name }}.vsix
+          asset_name: ${{ steps.set-version.outputs.name }}.vsix
+          asset_content_type: application/zip
+  publish:
+    if: github.event_name == 'release'
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref: prerelease
+          token: ${{ secrets.TOKEN }}
+      - uses: actions/download-artifact@v2
+        with:
+          name: meta
+          path: .
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.x
+      - name: Prepare pre-release build
+        id: set-version
+        run: |
+          VERSION=`cat .version`
+          NEXT_VERSION=`cat .version | awk -F. '/[0-9]+\./{$NF++;print}' OFS=.`
+          echo ::set-output name=name::`cat .name`
+          tmp=$(mktemp)
+          git config --global user.name 'ProjectBot'
+          git config --global user.email 'bot@users.noreply.github.com'
+          jq --arg version "${NEXT_VERSION}-SNAPSHOT" '.version = $version' package.json > "$tmp" && mv "$tmp" package.json
+          git add package.json
+          git commit -m 'auto bump version after pre-release'
+          jq --arg version "$VERSION" '.version = $version' package.json > "$tmp" && mv "$tmp" package.json
+          npm install
+          jq 'del(.enableProposedApi,.enabledApiProposals)' package.json > "$tmp" && mv "$tmp" package.json
+          git push
+      - name: Build pre-release package
+        run: |
+          npx vsce package --pre-release -o ${{ steps.set-version.outputs.name }}.vsix
+      - name: Upload Release Asset
+        id: upload-release-asset
+        uses: actions/upload-release-asset@v1
+        if: runner.os == 'Linux'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ github.event.release.upload_url }}
+          asset_path: ${{ steps.set-version.outputs.name }}.vsix
+          asset_name: ${{ steps.set-version.outputs.name }}.vsix
+          asset_content_type: application/zip
+      - name: Publish to VSCode Marketplace
+        run: |
+          [ -n "${{ secrets.VSCE_TOKEN }}" ] && \
+            npx vsce publish --pre-release --packagePath ${{ steps.set-version.outputs.name }}.vsix -p ${{ secrets.VSCE_TOKEN }} || true