Select any passage of text inside a conversation and a small "Add to Memory" button appears right above the highlight — no need to wait for an agent to think to write a Memory down itself.
Clicking it opens a short, editable summary pre-filled from whatever you selected, so you're not stuck copying a rambling paragraph verbatim — trim it down to the one sentence that actually matters before saving.
Saved this way, it's attached to that conversation and searchable from anywhere else in DF Code — the same mechanism an agent uses to write its own notes down as it works.