List Discord channels
Input
guildId requiredServer id, e.g. from discord.com/list_servers.
Output
guildId requiredchannels requiredChannels in sidebar order. The sidebar is scrolled top to bottom to cover rows the page renders lazily. Threads are not listed (a channel's thread rows are skipped).
categories requiredCategories in sidebar order.
Read Discord messages
Reads the most recent messages of a Discord channel (author, timestamp, text), newest first, scrolling up to load more until the requested count. Requires being logged in. Also reads a THREAD or a FORUM POST: both are channels in their own right, so pass the post's url (from discord.com/list_forum_posts) and you get its replies plus the opening post, newest first — there is no separate thread-reading script. It does NOT accept a forum channel itself, which lists posts rather than messages: use discord.com/list_forum_posts for that.
Post a Discord message
Posts a text message in a Discord channel, addressed by channel URL. Requires being logged in to Discord. Returns `sent` plus the created message's messageId, channelId, timestamp and content as Discord stored it. This is a write: the message appears in the channel and is visible to everyone who can see it. Discord's own message limits are checked before anything is sent, so a message that is empty or whitespace-only, or longer than 2000 characters, is refused straight away with a clear reason.
Find Discord member ID by name
Resolves a Discord member's userId from their name, through a channel's mention autocomplete (@name). Useful to build a <@id> ping. Requires being logged in.