Four moves for the gap between "I said something" and "something actually changed", not a general essay on accountability culture.
01
Separate the standard from the reminder
If you're reminding someone of the same thing every week, the problem usually isn't that they forgot: it's that the standard was never actually set. Say it once, clearly, as a standard. Then hold them to that, not to your patience running out.
02
Put it in writing after you say it out loud
A conversation is easy to reinterpret later, by both of you. A two-line follow-up message: "confirming what we agreed", removes the ambiguity that lets a missed commitment turn into a disagreement about what was actually said.
03
Make the consequence proportional and real
Accountability isn't the same as punishment, but it does require something to actually happen when a commitment is missed: even if that's just a direct conversation naming the pattern. If nothing ever happens, the standard was never real to begin with.
04
Track patterns, not incidents
One missed deadline is a bad week. Three is a pattern worth naming directly. The line between accountability and micromanagement is usually how often you're checking: checking after a pattern is management, checking after every task is control.