cf.client.bot is a boolean flag which indicates whether the request came from a known crawler. While this allows for some generic filtering it would be nice to have more granular control over such requests to block (or allow) for example only specific crawlers.
For this I’d like to suggest
cf.client.crawler (different name to keep backwards compatibility with the current flag, but any other name should be fine too) which contains an optional lowercase string specifying the crawler which sent the request (or null/undefined/etc. in case of no crawler).
This would allow for a more flexible configuration of the following type