@picasso/mail

dsh cordis plugin: cross-session mail (B11). `mail/send` Host Remote delivers a prompt into any thread's inbox stamped `source.mail {fromId, fromTitle, at, senderKind}` so the sender is attributed on the message, not impersonating the person; the `send_mail` model tool gives agents the same path for genuine two-way agent mail between unrelated top-level sessions.