name: npm publish

on:
  push:
    tags:
      - 'v*'
  workflow_dispatch:

jobs:
  publish:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: 22
          registry-url: https://registry.npmjs.org/

      - name: Verify tag matches package version (tag pushes only)
        if: github.event_name == 'push'
        run: |
          TAG="${GITHUB_REF#refs/tags/}"
          VER="v$(node -p "require('./package.json').version")"
          if [ "$TAG" != "$VER" ]; then
            echo "::error::tag ${TAG} does not match package version ${VER} — bump package.json first"
            exit 1
          fi

      - name: Publish to npm
        run: npm publish
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}