A boundary is a complete sentence.
What are you about to send? Fullstop marks the justifying, arguing, defending, and explaining — then hands back the version that holds.
New here?
Fullstop reads for four habits. Each one hands the other person something to grab.
Justify. Reasons you didn't owe. An excuse can be argued down; a decision can't.
Argue. Litigating what's fair. The moment fairness is on the table, you're on trial.
Defend. Receipts for your own character. Every receipt invites an audit.
Explain. Hedges, apologies, more context. Each extra clause is another handle.
Or start with one of these
Loads the draft and reads it.