Как увидеть повторяющиеся напоминания Slackbot?

использовать следующий процесс:

• стать слабину администратора или попросить помощи у тебя админ
• используйте инструмент экспорта, чтобы получить доступ к истории сообщений каждого канала в формате JSON
• написать сценарий для поиска через каждый файл JSON каждого канала
• фильтровать сообщения по крайней мере bot message подтип и Reminder text

вот полный список подтипов для дальнейшего фильтрация:

Type               Description
bot_message        A message was posted by an app or integration
me_message         A /me message was sent
message_changed    A message was changed
message_deleted    A message was deleted
channel_join       A member joined a channel
channel_leave      A member left a channel
channel_topic      A channel topic was updated
channel_purpose    A channel purpose was updated
channel_name       A channel was renamed
channel_archive    A channel was archived
Channel_unarchive  A channel was unarchived
group_join         A member joined a group
group_leave        A member left a group
group_topic        A group topic was updated
group_purpose      A group purpose was updated
group_name         A group was renamed
group_archive      A group was archived
group_unarchive    A group was unarchived
file_share         A file was shared into a channel
file_reply         A reply was added to a file
file_mention       A file was mentioned in a channel
pinned_item        An item was pinned in a channel
unpinned_item      An item was unpinned from a channel

ссылки

• руководство по импорту и экспорту Slack tools-Slack Help Center

• как читать экспорт данных Slack-Slack Help Center