A short list you already believe in beats a wide one
You already know which companies you want to work with: current clients, lapsed ones, the targets you have been circling. What you do not know is which of them opened a role in your discipline since you last looked. Checking forty career pages by hand is the task that never gets done.
This play does that check. It differs from find every company hiring in your market in one respect that changes everything downstream: the list is yours. Nothing that comes back needs qualifying, because you qualified the company when you put it on the list. A company's own career page carries its own roles, so there is little agency noise to clear. Forty accounts checked properly return fewer results than a market sweep and lead to more conversations.
The second idea is memory. A career page read once is a snapshot. Read against the last run, it becomes a signal: this role was not there before. That is what you act on, and it is what stops the same twelve vacancies landing in front of you every week.
What you get back
A table of what changed: company, role title, location, the link to the advert, the date the role was first seen where job data carries it, and whether it is new since the last run. For each new role, the person most likely to own the hire with title and verified work email, and a short draft note about that role. Accounts with nothing new are listed as checked, so silence reads as a result and not as a gap.
Variations worth knowing
Watch the same list for other signals. Funding rounds and news events can be pulled for a named company, so the accounts can also be checked for a raise or a leadership change.
Put it on a schedule. Once a hand run looks right, the check converts into a saved workflow. The daily business development brief is the play that covers scheduling.
Where this goes wrong
The first run has nothing to compare against. Everything looks new because nothing was recorded before. Treat run one as the baseline, or use the first-seen dates to pick out the recent roles.
A wrong website. A guessed address can map a different company with a similar name, and every later step inherits the mistake. When the agent asks which site is right, answer it.
An empty result is ambiguous. It can mean no open roles, or a jobs page the read did not find. Give the agent the direct address of that company's jobs page and run it again.
One advert, thirty agencies. A message about a single advert is the least differentiated outreach there is. What the others lack is your history with the account. Put it in the draft.