MECHANISM 01
Two model tiers, not one
"Is this organisation large enough to qualify?" is a yes-or-no question. Running it through the same expensive model that writes the research is waste — at scale it is most of the bill.
A fast tier handles the binary decisions and the short-form writing. A deep tier handles the nuanced research and the first draft, where the quality difference is actually visible. The routing is what keeps per-lead cost in cents rather than dollars.
MECHANISM 02
The deliverability firewall
Sender reputation is the asset outbound runs on, and it is destroyed by bounces. Three escalating checks stand between a discovered address and a draft: syntax and disposable-domain rejection, a live mail-server probe, and — only for catch-all domains, which accept everything and confirm nothing — a confidence score that must clear a threshold.
Fail any tier and the lead routes to a different channel instead. It is never given a fabricated address to try.
MECHANISM 03
Contact pinning
Re-running a pipeline over an account you already know is where data quietly degrades: a fresh extraction returns something plausible and overwrites a contact somebody had verified by hand.
Every contact carries the trust rank of the source that produced it. A higher rank may overwrite a lower one; a lower rank never overwrites a higher one. A manual lock blocks all automated writes permanently — so a human correction is final, which is the property that makes people willing to correct anything at all.
MECHANISM 04
Confidence scoring
Every lead is scored from 0 to 100 across four axes: the trust rank of the contact source, the deliverability verdict, how many intent signals the research actually found, and whether a profile was located.
It deliberately does not predict reply likelihood — nothing in the data supports that claim. It measures how much the system actually knows, so a queue can be worked in evidence order and the weakest leads can be discarded rather than sent anyway.