"I'll send it over this week." The reply took forty seconds, the thread left the inbox, everyone's happy, and the promise inside it now exists nowhere except the other person's memory, where it is doing patient, compound-interest damage to your reputation. Ten days later it returns wearing its adult form: "Just circling back on this."
Why do sent promises evaporate?
Because sending feels like finishing. The brain files the episode as handled the moment the reply leaves (the composing effort reads as completion), and sent mail, where the promise physically lives, is a write-only archive: nothing in it resurfaces, reminds, or ranks. The commitments other people make to you at least sit in your inbox where you might trip over them; the ones you make leave the building immediately. The open-loop research has a cruel footnote here: uncaptured promises still hum in the background, felt as vague unease, without ever becoming specific enough to act on.
The capture-at-send habit
One rule: a reply containing a promise doesn't get sent until the promise is captured. Write the reply, add the task (verb first, date attached, thread linked: "Send Elena revised deck, Thursday"), then send. Ten seconds, in the exact moment the commitment is sharpest in your mind. The variant for tiny promises: if fulfilling it takes under two minutes, do it before sending the reply at all, so the email announces a done thing; the two-minute rule at its best.
Anchor the habit to the send button: the click is the cue. Habits attached to existing actions survive; habits requiring remembering don't, which is the whole problem being solved.
The automatic version
Reading "I'll get you the numbers by Friday" out of an outbound email and creating a dated task is squarely what language models do well now, and it removes the discipline requirement entirely. Pidgy reads sent mail on Gmail and Outlook and extracts commitments in both directions: what you promised becomes next actions with dates and source links, what others promised becomes tracked waiting-fors. The reputation for reliability that follows is slightly unearned, which is the best kind.
