The web app's message records are typed as the lexicon's MessageRecord, and a conversation's info as InfoRecord, from the local copy, which holds only records the server validated, through BranchMessage to the message, status, details, part, and tool views, so their reads need no casts. src/shared/message.ts holds what a status means, isPending and isFinished, which counts a status another client wrote that this app doesn't know as neither, along with a message's parts, whether it is encrypted, and who wrote it, in place of the checks written out in the message view, the message actions, the chat, the reply follower, and tool status. Tests build records with messageRecord in tests/helpers/records.ts, and the status rules are tested once.