landing-static: prerender landing page via route groups

[x0ba]

Why?

The landing page at / was SSR'd on every request because the root layout server load reads auth from cookies. Marketing content is fully static, so we can prerender it as HTML at build time for faster loads and CDN caching on Vercel.

What

• Split routes into (marketing) and (app) groups (URLs unchanged)
• Move readUserId, AppShell, and PostHog identify into (app)/+layout.* only
• Slim root layout to shared CSS/favicon
• Add export const prerender = true on the landing page
• Mark dashboard links with rel="external" so the prerender crawler skips auth-protected /runs

Test plan

• bun run build succeeds and emits prerendered index.html
• / loads marketing content without hitting serverless auth
• /runs and /regression still require auth and render with AppShell
• /sign-in and /sign-up still redirect authenticated users

[vercel]

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Project	Deployment	Actions	Updated (UTC)
flightlog	Ready	Preview, Comment	May 28, 2026 6:30pm

[x0ba]

• landing-static: prerender landing page via route groups #47 👈 (View in Graphite)
• staging

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[greptile-apps]

Greptile Summary

This PR restructures the SvelteKit route tree into (app) and (marketing) route groups, allowing the landing page to be prerendered as static HTML at build time. The root layout is stripped down to CSS/favicon only; AppShell and PostHog identify are moved into the new (app) group layout.

• (marketing)/+page.ts exports prerender = true and all outbound dashboard links are marked rel="external" to stop the prerender crawler from following auth-protected routes.
• (app)/+layout.server.ts (renamed from the root) continues to provide userId to all authenticated routes, and (app)/+layout.svelte wraps them unconditionally with AppShell.
• Sign-in and sign-up pages stay in (marketing) and keep their own +page.server.ts auth-redirect checks — they are not affected by the prerender setting on the landing page.

Confidence Score: 5/5

Safe to merge — the refactor is a clean mechanical split with no logic changes to auth or app routes.

Every app route is a pure rename into (app) with no content changes. The sign-in/sign-up pages keep their own server-side auth redirects and are unaffected by the landing page's prerender flag. The root layout losing its server data dependency is exactly what's needed to allow prerendering, and rel="external" correctly stops the crawler at dashboard links. No auth logic was altered.

No files require special attention.

Important Files Changed

Filename	Overview
src/routes/(marketing)/+page.ts	Adds export const prerender = true — the entire motivation of the PR. Single-line change, correct and sufficient.
src/routes/(app)/+layout.server.ts	Renamed from root layout; content is unchanged. Auth read now scoped to (app) group only, enabling prerender of marketing routes.
src/routes/(app)/+layout.svelte	New layout for app group; contains AppShell and PostHog identify logic moved from the root layout. Unconditional AppShell render is correct since all (app) routes are authenticated.
src/routes/+layout.svelte	Stripped to CSS import, favicon, and {@render children()}. Removing server data dependency from this file is the key enabler for prerendering.
src/routes/(marketing)/+page.svelte	Three dashboard links gain rel="external" to prevent the prerender crawler from following them to auth-protected routes. No other functional changes.
src/routes/(marketing)/sign-in/+page.server.ts	Renamed only; still calls readUserId(event) directly so the auth-redirect still works without needing a parent layout server.
src/routes/(marketing)/sign-up/+page.server.ts	Same as sign-in: renamed only, auth redirect logic intact.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    Root["+layout.svelte\nCSS + favicon only"]

    Root --> Marketing["(marketing) group\nno layout server"]
    Root --> App["(app) group\n+layout.server.ts → userId"]

    Marketing --> Landing["/ +page.svelte\nprerender = true ✓"]
    Marketing --> SignIn["/sign-in +page.server.ts\nreadUserId → redirect if authed"]
    Marketing --> SignUp["/sign-up +page.server.ts\nreadUserId → redirect if authed"]

    App --> AppLayout["(app)/+layout.svelte\nAppShell + PostHog identify"]
    AppLayout --> Runs["/runs"]
    AppLayout --> RunId["/runs/[id]"]
    AppLayout --> Regression["/regression"]
    AppLayout --> RegressionId["/regression/[id]"]
    AppLayout --> RegressionRuns["/regression/runs/[id]"]

    Landing -->|"rel=external links\n(crawler stops here)"| Runs

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