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// app/src/routes/guide.$slug.tsx
import { useQuery } from '@tanstack/react-query'
import { api } from '@/lib/client' // hc<AppType>

const { slug } = Route.useParams()
const { data: guide } = useQuery({
  queryKey: ['guide', slug],
  queryFn: () => api.guides[slug].$get(),
})

// api/src/routes/guides.ts
import { Hono } from 'hono'

export const guides = new Hono<Env>()
  .get('/:slug', async (c) => {
    const { slug } = c.req.param()
    const g = await topGuide(c, slug)
    return c.json(g)
  })

-- walk the prereq DAG in one query
WITH RECURSIVE prereqs AS (
  SELECT from_guide, to_guide, 1 AS depth
  FROM guide_edges WHERE to_guide = $1
  UNION ALL
  SELECT e.from_guide, e.to_guide, p.depth+1
  FROM guide_edges e
  JOIN prereqs p ON e.to_guide = p.from_guide
)
SELECT * FROM prereqs;