Record every response in order and stop describing a chain as healthy until its destination and intent equivalence are checked.
Capture each hop
Store the requested URL, response status, Location field, resolved destination, timestamp, and any cache or robots headers. Use a fixed redirect limit and flag repeated URLs as loops.
- Start from the exact historical or internal URL, including scheme and query.
- Record the first response before following it.
- Resolve a relative Location value against the current URL.
- Repeat until a non-redirect response, a loop, or the configured hop cap.
- Inspect the final representation and whether it satisfies the original user job.
Read permanence as stated intent
RFC 9110 defines the HTTP meaning of redirect status codes. Search platforms can add their own processing rules; Google currently describes 301 and 308 as permanent signals and 302, 303, and 307 as temporary signals for Search.
That processing guidance does not prove that the target is equivalent, indexable, or selected as canonical. Those are separate checks.
Look for avoidable ambiguity
A long chain is not automatically broken, but every additional hop adds another state that must work. Reduce it when the direct destination is known and behavior can be preserved.
- Multiple permanent hops where one direct redirect is possible.
- A scheme or host oscillation that creates a loop.
- A Location value that drops a required path or parameter.
- A final 404, soft error, login page, or unrelated homepage.
- Conflicting canonical or robots signals on the destination.
Check intent equivalence before consolidating
A permanent redirect is appropriate when the new resource is a real replacement for the old user job. Redirecting unrelated retired downloads or many distinct pages to a homepage creates a misleading destination for both users and diagnostic systems.
When no equivalent remains, an explicit 404 or 410 can be more truthful than a broad redirect.