Module ids 

Newtype wrappers for identifiers used across the protocol — request IDs returned to the agent, tab IDs scoped to a host’s browser, and profile names. Each type owns its own validation/generation so we can’t accidentally pass a profile name where a tab ID is expected.

Structs

RequestId

A per-fetch identifier, generated by the SDK on each Client::fetch(...). Goes into the response request_id field and into the default --out path ($TMPDIR/afhttp-out/<request_id>/, platform equivalent).

TabId

A browser tab identifier, assigned by the host’s CDP target manager. Architecture.md §5 (--tab new|<id>) makes this the unit of fetch affinity for reusing browser state across requests.