name: Validate Docs

# There is ONE documentation site: the Next.js/Fumadocs app in `docs/`, published
# at https://headroom-docs.vercel.app by Vercel's own Git integration. That URL is
# what README and `pyproject.toml` (Homepage, Documentation) point at.
#
# This workflow therefore only *validates* — it deploys nothing. Vercel owns
# deployment; duplicating it here is what produced a `deploy-vercel` job that
# failed 30 times on main without ever deploying (no VERCEL_* secrets were set).
#
# A second site used to be built from `wiki/` by MkDocs and published to GitHub
# Pages off the `gh-pages` branch. It was linked from nowhere in the repo, it meant
# every documented change had to be written twice, and each Pages deploy
# force-pushed `gh-pages` — which Vercel then tried to build, failing with
# "The specified Root Directory 'docs' does not exist" because that branch holds
# only the rendered site. Removed. `wiki/` stays in the repo as unpublished
# markdown pending migration of the pages `docs/` does not yet cover (notably
# `wiki/cli.md`); nothing builds or publishes it, so it needs no syncing.

on:
  pull_request:
    branches: [main]
    paths:
      - 'docs/**'
      - '.github/workflows/docs.yml'
  workflow_dispatch:

permissions:
  contents: read

jobs:
  validate-nextjs:
    name: Validate Next.js build
    runs-on: ubuntu-latest
    timeout-minutes: 15
    steps:
      - uses: actions/checkout@v6

      - name: Setup Node.js
        uses: actions/setup-node@v7
        with:
          node-version: '22'
          cache: npm
          cache-dependency-path: docs/package-lock.json

      - name: Install dependencies
        run: npm ci
        working-directory: docs

      - name: Build docs
        run: npm run build
        working-directory: docs