Files
zitadel/apps/docs
314b1b50dd docs: eliminate runtime ISR writes via full SSG (#12103)
# Which Problems Are Solved

The Vercel `docs` project generated ~64M ISR writes over 30 days (99.5%
of ISR writes across all projects, ~\$258/month).

Root causes in the Next.js 16 docs app:
- `apps/docs/app/[[...slug]]/page.tsx` had `dynamicParams = true` +
`revalidate = 3600`. Bot traffic hitting unknown URLs (`/docs/wp-admin`,
`/docs/.env`, fuzzed paths) got rendered via \`notFound()\`, and the 404
response was cached as an ISR entry — 1 write per unique bad URL. Known
pages were also rewritten hourly for no reason since content only
changes on deploy.
- `apps/docs/app/og/docs/[...slug]/route.tsx` had `revalidate = false` +
empty `generateStaticParams()` + implicit `dynamicParams = true`. Every
unique OG URL (including bot probes) was cached forever — writes
accumulated permanently.

# How the Problems Are Solved

Switch the docs routes to pure SSG (content is static and only changes
on deploy, so ISR provides no value):

- `app/[[...slug]]/page.tsx`: `dynamicParams = false`, `revalidate =
false`, `dynamic = 'force-static'`. Unknown URLs now return a static 404
at the CDN — no function invocation, no ISR write. All 390 pages from
`source.generateParams()` are still pre-rendered.
- `app/og/docs/[...slug]/route.tsx`: `generateStaticParams()` now
returns all 390 pages via the existing `getPageImage(page).segments`
helper, so every OG image is pre-built as a static asset. `dynamicParams
= false` + `dynamic = 'force-static'` locks it down.
- `app/llms-full.txt/route.ts`: added `dynamic = 'force-static'` as a
safety net (already `revalidate = false`, single URL).

The tradeoff is longer CI builds (~40s–2min for 390 OG image
generations, paid on every preview deploy) in exchange for eliminating
~\$258/month in ISR writes plus associated function invocations and CPU
time.

# Additional Changes

None.

# Additional Context

- No changes to `next.config.mjs`, `vercel.json`, or redirects.
- Existing `apps/docs/redirects.json` (3,261 entries) covers legacy URLs
so `dynamicParams = false` won't 404 moved pages linked from elsewhere.
- Versioned routes: `content/versions.json` and `v*/` folders don't
exist yet. When versioning is activated, `generateStaticParams()` in
both files must also include `versionSource.generateParams()` —
otherwise versioned URLs will 404 under `dynamicParams = false`.

## Test plan

- [ ] CI build succeeds (expect modest build-time increase for OG
pre-generation)
- [ ] Inspect `apps/docs/.next/prerender-manifest.json` — all 390 doc
routes + 390 OG routes listed with `initialRevalidateSeconds: false`
- [ ] Local smoke: `/docs` → 200, `/docs/wp-admin` → 404 (static, no
function), `/docs/og/docs/guides/start/image.png` → PNG,
`/docs/og/docs/bogus/image.png` → 404
- [ ] Post-deploy: Vercel **ISR Writes** metric drops to near-zero
within 24h
- [ ] Post-deploy: Vercel **Function Invocations** for `/og/docs/*` drop
to zero
- [ ] Verify no legitimate docs pages 404 (cross-check logs against
`apps/docs/app/sitemap.ts`)

---------

Co-authored-by: Claude Opus 4.7 (1M context) <[email protected]>
2026-04-24 12:34:57 -03:00
..
2026-01-30 18:11:12 +00:00
2026-04-07 14:14:12 +02:00

@zitadel/docs

Documentation for Zitadel, built with Fumadocs and Next.js.

Getting Started

Ensure you have followed the root quick start to set up dependencies.

Local Development

Ensure all dependencies are installed:

pnpm install

Start the development server:

pnpm nx run @zitadel/docs:dev

The site will be available at http://localhost:3000.

Scripts

Key scripts for documentation workflows:

Script Description
dev Starts the development server.
build Builds the production application.
fetch:remote-content Fetches remote tags and referenced content.
generate Runs all generation steps (fetch:remote-content, generate:proto-docs, generate:api-reference, generate:index-pages).
check:links Validates content integrity (broken links, missing frontmatter, schema errors).
check-types Validates typescript types.
test Runs all validation steps (check-types, check:links).
lint checks for code style and syntax errors (ESLint).
clean Cleans the build output and generated files.

Validation

  • Code Quality: Run pnpm nx run @zitadel/docs:lint to check for syntax and style issues in JS/TS/MDX files.
  • Content Integrity: Run pnpm nx run @zitadel/docs:check-links to validate content structure, including:
    • Broken internal links
    • Missing required front-matter (e.g., title)
    • Image references

Troubleshooting

Issue: Nx configuration not found or "nx" command not found

If you see errors like:

 NX   Cannot find configuration for task @zitadel/zitadel:@zitadel/docs:generate

Pass --verbose to see the stacktrace.

or

pnpm nx run @zitadel/docs:dev
 ERR_PNPM_RECURSIVE_EXEC_FIRST_FAIL  Command "nx" not found

Did you mean "pnpm nx"?

Root cause: Your dependency cache or node_modules is out of sync.

Solution: Run these commands from the repository root in order:

  1. Clear node_modules: rm -rf node_modules — removes the installed dependency folder
  2. Clear pnpm cache: pnpm cache delete — clears pnpm's internal package cache
  3. Reinstall dependencies: pnpm install — reinstalls all dependencies fresh
  4. Test the setup: pnpm nx run @zitadel/docs:generate — verifies everything works

This resolves 99% of setup-related issues.

Contributing

Build Process

The docs build process automatically handles the following steps via generate:

  1. Downloads required protoc plugins.
  2. Generates gRPC documentation from proto files.
  3. Generates API documentation from OpenAPI specs.
  4. Generates index files for directory structures.

Style Guide

  • Variables: Use environment variables in code snippets where possible.
  • Embedded Content: Use _filename.mdx for content embedded in other pages (not indexed individually).
  • Code Embedding: Use the file property in code blocks to embed code from the repo.
  • Voice: Use active voice and sentence case for titles.

Refer to the Google Developer Style Guide for general guidelines.

Adding Content

All documentation content is located in the content directory. Note that the system strictly accepts only .mdx files.

To add a new page:

  1. Create a .mdx file in the appropriate subdirectory of content.
  2. Register the new page in the sidebar settings at lib/sidebar-data.ts to make it accessible in the navigation.

Pull Requests

Use docs(<scope>): <short summary> for PR titles. Pass quality checks before submitting:

pnpm nx run @zitadel/docs:build