diff --git a/.github/workflows/publish_github.yml b/.github/workflows/publish_github.yml
index 666654b..2267878 100644
--- a/.github/workflows/publish_github.yml
+++ b/.github/workflows/publish_github.yml
@@ -4,6 +4,12 @@ on:
   push:
     tags:
       - "v*"
+  workflow_dispatch:
+    inputs:
+      release_tag:
+        description: Existing tag to publish (must match package.json version, e.g. v1.1.0)
+        required: true
+        type: string
 
 permissions:
   id-token: write # Required for OIDC
@@ -14,13 +20,48 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
+        with:
+          ref: ${{ inputs.release_tag || github.ref }}
+
+      - uses: pnpm/action-setup@v4
 
       - uses: actions/setup-node@v6
         with:
           node-version: "24"
           registry-url: "https://registry.npmjs.org"
-          package-manager-cache: false # never use caching in release builds
-      - run: npm ci
-      - run: npm run build --if-present
-      - run: npm test
-      - run: npm publish # Or: npm stage publish
+          scope: "@warkypublic"
+          cache: pnpm
+
+      - name: Verify release tag
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+          TRIGGER_REF: ${{ github.ref }}
+          RELEASE_TAG: ${{ inputs.release_tag }}
+        run: |
+          node --input-type=module <<'JS'
+          import { readFileSync } from 'node:fs';
+          const { version } = JSON.parse(readFileSync('package.json', 'utf8'));
+          const tag = process.env.EVENT_NAME === 'workflow_dispatch'
+            ? process.env.RELEASE_TAG
+            : process.env.TRIGGER_REF.replace(/^refs\/tags\//, '');
+          if (tag !== `v${version}`) {
+            throw new Error(`Release tag must be v${version}; received ${tag || '(empty)'}`);
+          }
+          JS
+
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm test
+      - run: pnpm check:bundle
+
+      - name: Publish to npm
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: |
+          set -eu
+          : "${NODE_AUTH_TOKEN:?Set the NPM_TOKEN Actions secret with npm publish access}"
+          version=$(node -p "require('./package.json').version")
+          case "$version" in
+            *-*) dist_tag=next ;;
+            *) dist_tag=latest ;;
+          esac
+          pnpm publish --no-git-checks --tag "$dist_tag"