Changelog entry pages advertised a `.md` alternate tag unconditionally while the page is ISR, so an entry published in the changelog repo between www deploys pointed agents at a `.md` sibling that 404s until the next build (the static file and `CHANGELOG_PAGES` are both build-time artifacts). PR #49357 made bare-URL negotiation fail closed for those entries; I gate the advertising side here the same way. **Changed:** - **No more dead `.md` links on freshly published entries**: `getStaticProps` passes a `hasMarkdownVariant` flag computed from `CHANGELOG_PAGES` membership and the page renders the alternate tag only when true. An entry published between deploys carries no tag until the build that ships its `.md` file; the set reference stays inside `getStaticProps`, so the generated module stays out of the client bundle. - **Drift coverage**: `md-alternates.test.ts` gains the changelog direction, source-level like the existing `_app.tsx` drift test; the assertion pins the full `CHANGELOG_PAGES.has(` + backtick-`changelog/${entry.slug}`-backtick + `)` expression so a dropped key prefix fails the suite, and removing the gate fails it too. **Note:** without changelog sync secrets `CHANGELOG_PAGES` is empty, so the tag never renders in local dev. Preview and prod are the verification surface. ## To test Tested on Vercel preview: - [x] Open a published changelog entry page and view source: expect `<link rel="alternate" type="text/markdown" href="/changelog/<slug>.md">` in the head — observed exact href `/changelog/19669-supavisor-1-0.md` - [x] Fetch that href: expect 200 with `content-type: text/markdown` — observed 200, `text/markdown; charset=utf-8` - [x] (added) Client-side nav from `/changelog` into an entry: alternate tag appears with that entry's slug; hopping to a second entry updates the href (no stale tag) - [x] (added) Navigating back to `/changelog`: entry tag gone; the index shows its own pre-existing `/changelog.md` alternate (hardcoded in `pages/changelog.tsx`, outside this diff), and `/changelog.md` returns 200 `text/markdown` - [x] (added) Console: zero new errors across all scenarios vs page-load baseline ## Linear - fixes GROWTH-1120 <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Bug Fixes** * Changelog pages now advertise a Markdown alternate link only when a Markdown version is available. * Prevented links to unavailable Markdown content from appearing on changelog entries. * **Tests** * Added coverage to verify correct Markdown alternate detection and rendering. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
supabase.com
Overview
Refer to the Development Guide to learn how to run this site locally.
To get started copy the example env file using cp .env.local.example .env.local.
Best practices
Images
- Resize images: All new images should be resized to only the maximum resolution needed when rendering on the frontend. Don't upload images larger than what will be displayed.
- Compress images: All new images should be compressed before committing. Use tools like Clop or ImageOptim to reduce file size without noticeable quality loss.
- Image locations: Store blog post images in
apps/www/public/images/blog/. Event images go inapps/www/public/images/events/. Customer logos go inapps/www/public/images/customers/logos/on-light/andon-dark/(see Customer Stories below).
OG image generation
Open Graph (OG) images for social sharing are handled differently across content types:
- Blog posts: Use static images via
imgSocialandimgThumbfields (see Blog posts section below) - Events: Use dynamic generation via Edge Function (with optional
og_imageoverride) - Customer stories: Use dynamic generation via Edge Function (no static option)
The og-images Edge Function (supabase/functions/og-images/) automatically generates OG images for events and customer stories. It's deployed via .github/workflows/og_images.yml when changes are made to the function code.
Development: In local development, the function runs at http://127.0.0.1:54321/functions/v1/og-images. Ensure Supabase is running locally (supabase start).
Content frontmatter image fields
Different content types use different image field conventions:
Blog posts
Blog posts support two image fields in their frontmatter:
imgSocial: Used for Open Graph and social media sharing (X, LinkedIn, etc.). These images should include text overlays since they appear standalone in social feeds without accompanying text.imgThumb: Used for internal thumbnails displayed on the blog listing pages and featured posts. These images don't need text overlays since they're always displayed alongside the post title and description.
This naming convention was introduced to replace the previously confusing thumb and og fields, which were often mixed up. The new names clearly indicate:
imgSocial: Purpose-built for social media sharing (needs text overlays)imgThumb: Optimized for site display (clean, no text overlays)
This separation allows you to optimize images for their specific use case while maintaining a clear, unambiguous naming convention.
Image path format
Always use relative paths (just the filename or subfolder/filename). The /images/blog/ prefix is added automatically by the code.
- ✅ Correct:
imgSocial: my-post/og.pngorimgSocial: og.png - ❌ Wrong:
imgSocial: /images/blog/my-post/og.png(creates double prefix)
Image fallback behavior
For site display (what visitors see):
- Priority 1:
imgThumb - Priority 2:
imgSocial(ifimgThumbis missing) - Priority 3:
/images/blog/blog-placeholder.png(if both missing)
For social sharing (Open Graph meta tags):
- Priority 1:
imgSocial - Priority 2:
imgThumb(ifimgSocialis missing) - Priority 3: No fallback (undefined)
What happens if fields are not provided?
- If only
imgThumbis provided: Site displays the image correctly, social sharing usesimgThumbas fallback - If only
imgSocialis provided: Social sharing uses it, site display uses it as fallback - If neither is provided: Site shows placeholder image, social sharing has no image
- Best practice: Provide both fields for optimal display and social sharing
Example
---
title: 'My Blog Post'
imgSocial: 2025-01-01-my-post/og.png # Relative path - with text overlay for social sharing
imgThumb: 2025-01-01-my-post/thumb.png # Relative path - without text, clean image
---
The images would be stored at:
apps/www/public/images/blog/2025-01-01-my-post/og.pngapps/www/public/images/blog/2025-01-01-my-post/thumb.png
Or if using the same image for both:
---
title: 'My Blog Post'
imgSocial: my-image.png # Stored at: apps/www/public/images/blog/my-image.png
imgThumb: my-image.png
---
Events
Events use different image fields to avoid confusion with their display patterns:
thumb: Used for event grid item thumbnails (small cards in listing)cover_url: Used for the featured event banner (large display on events page)og_image(optional): Used to override the dynamically generated OG image for social sharing
OG image generation
Events automatically generate Open Graph images using the og-images Supabase Edge Function. The function creates images dynamically based on:
- Event type (conference, hackathon, etc.)
- Title (or
meta_titleif provided) - Description (or
meta_descriptionif provided) - Date (formatted as "DD MMM YYYY" using the event's timezone)
- Duration (if provided)
If you need a custom OG image that differs from the auto-generated one, you can provide an og_image field in the frontmatter. This will override the dynamic generation.
Example:
---
title: 'Supabase Meetup'
thumb: /images/events/2025-01-meetup/thumbnail.png
cover_url: https://external-cdn.com/event-banner.jpg
og_image: /images/events/2025-01-meetup/custom-og.png # Optional override
---
Note: The og_image field is optional. If not provided, OG images are generated automatically via the Edge Function.
End-to-end checks
Content pages are loaded and scanned with axe-core by the Playwright suite in
e2e/www. Pull requests test the pages your change affects. Today the suite
enforces one accessibility rule, page-has-heading-one.
To test the pages your current branch changes:
PLAYWRIGHT_BASE_URL=https://supabase.com pnpm e2e:www
That resolves which pages to test from your branch, but reads them from
production, so it won't see your edits and will 404 on a page you just added.
Point PLAYWRIGHT_BASE_URL at your pull request's preview to test your own
content.
See e2e/www/README.md
for coverage and limits.
Go pages (/go/*)
/go/ is a system for building standalone campaign landing pages (lead generation, legal, thank-you flows). The name is intentionally generic — these pages are typically linked from ads, emails, or partner campaigns and are not part of the main site navigation.
Pages are defined as TypeScript objects (not MDX files) and validated against Zod schemas at build time.
Parts
| Location | Purpose |
|---|---|
apps/www/_go/ |
Page definitions. Each file exports a page object. index.tsx registers all pages. |
apps/www/app/go/[slug]/page.tsx |
App Router route — renders the page for a given slug, handles 404s and metadata. |
apps/www/components/Go/GoPageRenderer.tsx |
www-specific wrapper — adds the Supabase logo header and footer, registers custom section renderers. |
packages/marketing/src/go/ |
Framework-agnostic core: schemas, section components, templates, form server action. |
packages/marketing/src/crm/ |
CRM client abstraction (HubSpot + Customer.io) used by the form server action. |
Page structure
Each page specifies a template which determines its top-level layout:
lead-gen— hero + arbitrary sections (form, metrics, feature grid, tweets, social proof, etc.)thank-you— hero + sections + confetti animationlegal— hero + table-of-contents sidebar + markdown body
Pages are arrays of typed section objects. The SectionRenderer in packages/marketing dispatches each section to the right component based on its type field.
Custom renderers
The marketing package doesn't know about topTweets data or the Pages Router basePath, so the tweets section type has no default renderer. GoPageRenderer.tsx in www registers TweetsSection as a custom renderer for that type. This is the extension point for any section that requires www-specific dependencies.
Adding a new page
- Create a new file in
apps/www/_go/<category>/my-page.tsxexporting a page object. - Register it in
apps/www/_go/index.tsx. - The page will be available at
/go/<slug>automatically via static generation.
Customer Stories (Case Studies)
Customer stories are defined in MDX files (apps/www/_customers/*.mdx) and use a different approach:
- No
og_imagefield: Customer stories do NOT use static OG images - Dynamic OG generation: All customer story OG images are automatically generated using the
og-imagesSupabase Edge Function - The function creates images based on the customer
slugandtitle(ormeta_titleif provided)
Do not include an og_image field in customer story frontmatter. It will be ignored. OG images are always generated dynamically.
Logos
Customer logos are monochrome and transparent. Prefer SVG; PNG is also fine. Put each theme variant in the folder named for the background it sits on:
| Folder | Mark | Frontmatter | Shown in |
|---|---|---|---|
/images/customers/logos/on-light/ |
Dark/black | logo |
Light mode |
/images/customers/logos/on-dark/ |
Light/white | logo_inverse |
Dark mode |
Do not use coloured brand marks. Preview /customers in both themes before merging.
Icon-only assets (homepage chips, etc.) stay at /images/customers/logos/{slug}-icon.svg.
Customer story OG images are generated by the og-images Edge Function, which fetches https://supabase.com/images/customers/logos/on-dark/{slug}.png. Satori cannot rasterise SVG, so stories still need an on-dark/{slug}.png even if the site uses SVG.
Example (in apps/www/_customers/company-abc.mdx):
---
name: Company ABC
title: Company ABC built their platform with Supabase
# DO NOT include og_image - it's generated automatically
logo: /images/customers/logos/on-light/company-abc.svg
logo_inverse: /images/customers/logos/on-dark/company-abc.svg
---
Legacy Case Studies (in data/CustomerStories.ts):
imgUrl: Path to the case study image in the source data- This gets mapped to
imgThumbwhen rendered viaBlogGridItemcomponent - Case studies only need one image for site display (no separate social sharing image)
Example (in data/CustomerStories.ts):
{
type: 'Customer Story',
title: 'Company ABC built their platform with Supabase',
description: '...',
organization: 'Company ABC',
imgUrl: 'images/customers/logos/on-light/company-abc.svg', // Full path from public/
logo: '/images/customers/logos/on-light/company-abc.svg',
logo_inverse: '/images/customers/logos/on-dark/company-abc.svg',
url: '/customers/company-abc',
}