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Alaister Young cb34acd45c [GROWTH-773] chore(www): serve llms.txt content via API routes (#44897)
The docs build had a fragile implicit dependency on www's filesystem
(`../../../apps/www/public/llms`), flagged by the docs team in #44670.
Rather than formalising that dependency with a shared package, this PR
eliminates it entirely by making www the sole owner of llms content
assembly.

**How it works now:**

`/llms/[slug]` handles all `/llms/*.txt` requests via a 3-step cascade:
1. Dynamic content — `pricing.txt` generated at request time from
`shared-data` imports
2. Local file — product overviews read from `data/llms/`
3. Docs proxy — reference docs (guides, js, dart, etc.) fetched from the
docs app

No hardcoded slug lists, so adding new content just works.

**What changed:**

- `apps/docs/scripts/llms.ts` trimmed to only generate per-source
reference files — www now owns `llms.txt`, `llms-full.txt`, and product
overviews
- Removed `generateLlmsPricing.mjs` build script — pricing generated
dynamically from `shared-data`
- Removed llms rewrites from `rewrites.js` — routes handle everything
with consistent `Cache-Control: public, s-maxage=3600,
stale-while-revalidate=86400`
- Product overview `.txt` files moved from `public/llms/` → `data/llms/`
so all requests go through routes for consistent caching

**Docs team concerns from GROWTH-773:**

| Concern | Resolution |
|---------|-----------|
| Docs build depends on www files at a fragile relative path | Path
removed — docs no longer reads from www |
| www restructuring breaks docs with no obvious connection | Eliminated
— no cross-app filesystem dependency |
| No build order enforcement between www and docs | Not needed — docs
doesn't depend on www's build output |

## To test

- `curl <preview>/llms.txt` — markdown index with doc + product overview
links
- `curl <preview>/llms-full.txt` — combined product overviews + docs
content
- `curl <preview>/llms/pricing.txt` — dynamically generated pricing
tables
- `curl <preview>/llms/auth.txt` — product overview from local file
- `curl <preview>/llms/guides.txt` — proxied from docs app
- `curl <preview>/llms/nonexistent.txt` — 404
- Verify `Cache-Control` header on all responses

---------

Co-authored-by: Alaister Young <10985857+alaister@users.noreply.github.com>
2026-04-15 22:45:01 +09:00
..