Add canonical tags to every page

If this is a change to your product

What must become true

Every indexable page declares a self-referential canonical at its absolute, final URL — the one after any redirect or trailing-slash normalisation.

Where it usually lives

The shared metadata layer, derived from the route rather than hand-written per page.

The trap

Hand-written canonicals drift the moment a route moves, and a canonical pointing at a redirecting URL is worse than none: it tells the engine to index a page that is not there.

This unlocks

• Serve a Markdown version of each content page to agents that ask for it

In topics

• Technical SEO and indexing