Mattermost connector for the TentClaw channel adapter: one normal user account (personal access token or username + password), posts, thread replies, edits, reactions and capped file attachments in; posts, thread replies, reactions and files out, only to member channels. A rejected credential stops it with status ok false. After a reconnect it fetches what it missed, and its cursor advances only after the adapter acknowledged. Replaces mattermost-channel. Bun, no npm dependencies.