Texts, emails, messages. The only thing on your log that’s half someone else’s.
Everything else here is yours to keep and yours to publish. A conversation isn’t — half the words belong to the other person. So this kind works differently from every other: your side is yours; their side is kept, attached to them, and never crosses to public on your say-so alone. Forwarded by you, never pulled from an inbox.
Reading the log.
Two owners, one entry. Your side is yours — entries, quotes, public, normal rules. Their side is theirs: kept, attached to them, filed as “they said”, never public on your word alone.
Their yes is a fact on the log. Not a checkbox. When they said it, how, for which words. Revocable, and revoking pulls the quotes. The default, for everyone, is the most private state.
Forwarded, never pulled. The log doesn’t read your inbox. Every conversation on it is one you chose to bring in, because every one has another person in it.