diff --git a/.github/workflows/db-bigquery.yaml b/.github/workflows/db-bigquery.yaml
index 12d1c3a82..ce706a0cf 100644
--- a/.github/workflows/db-bigquery.yaml
+++ b/.github/workflows/db-bigquery.yaml
@@ -1,6 +1,6 @@
 name: BigQuery DB
 
-on: [pull_request]
+on: [pull_request, workflow_call]
 
 jobs:
   test-bigquery:
diff --git a/.github/workflows/db-motherduck.yaml b/.github/workflows/db-motherduck.yaml
index 7d0d4f580..5532dade3 100644
--- a/.github/workflows/db-motherduck.yaml
+++ b/.github/workflows/db-motherduck.yaml
@@ -1,6 +1,6 @@
 name: MotherDuck DB
 
-on: [pull_request]
+on: [pull_request, workflow_call]
 
 jobs:
   test-motherduck:
diff --git a/.github/workflows/db-postgres.yaml b/.github/workflows/db-postgres.yaml
index bbecab194..9aa12bddf 100644
--- a/.github/workflows/db-postgres.yaml
+++ b/.github/workflows/db-postgres.yaml
@@ -1,6 +1,6 @@
 name: Postgres DB
 
-on: [pull_request]
+on: [pull_request, workflow_call]
 
 jobs:
   # Label of the container job
diff --git a/.github/workflows/db-snowflake.yaml b/.github/workflows/db-snowflake.yaml
index c4e6b8438..e7226a733 100644
--- a/.github/workflows/db-snowflake.yaml
+++ b/.github/workflows/db-snowflake.yaml
@@ -1,6 +1,6 @@
 name: Snowflake DB
 
-on: [pull_request]
+on: [pull_request, workflow_call]
 
 jobs:
   test-snowflake:
diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 71b14ee37..713dd4e66 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -1,6 +1,6 @@
 name: Core
 
-on: [pull_request]
+on: [pull_request, workflow_call]
 
 jobs:
   test-all:
diff --git a/.github/workflows/prerelease.yaml b/.github/workflows/prerelease.yaml
new file mode 100644
index 000000000..1bb621598
--- /dev/null
+++ b/.github/workflows/prerelease.yaml
@@ -0,0 +1,46 @@
+name: npmjs.com Pre-release
+
+on: [push]
+
+jobs:
+  db-bigquery:
+    uses: './.github/workflows/db-bigquery.yaml'
+  db-motherduck:
+    uses: './.github/workflows/db-motherduck.yaml'
+  db-postgres:
+    uses: './.github/workflows/db-postgres.yaml'
+  db-snowflake:
+    uses: './.github/workflows/db-snowflake.yaml'
+  main:
+    uses: './.github/workflows/main.yaml'
+
+  npm-prerelease:
+    needs:
+      - db-bigquery
+      - db-motherduck
+      - db-postgres
+      - db-snowflake
+      - main
+    runs-on: ubuntu-latest
+    env:
+      PACKAGES: 'packages/malloy-interfaces packages/malloy packages/malloy-db-bigquery packages/malloy-db-duckdb packages/malloy-db-postgres packages/malloy-db-snowflake packages/malloy-db-trino packages/malloy-render packages/malloy-malloy-sql test packages/malloy-syntax-highlight'
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: 'true'
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 18.x
+      - name: npm install, build, and publish
+        run: |
+          npm ci --loglevel error
+          npm run build
+          echo Publishing \$PACKAGES
+          PRERELEASE=\$(date +%y%m%d%H%M%S)
+          VERSION=\$(jq -r .version ./lerna.json)-dev\$PRERELEASE
+          npx lerna version \$VERSION --yes --no-push --no-git-tag-version
+          for package in \$PACKAGES; do
+            echo Publishing \$package \$VERSION
+            npm publish --dry-run -w \$package --access=public --tag next
+          done