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/go

/go <name or number>
The quickest way to jump around. Accepts buffer numbers, exact names, or partial matches. 
/go 3          # jump to window 3
/go #rust      # exact match
/go rust       # partial match — finds #rust
/go flu        # partial match — finds #flume
/go libera     # switch to a different server
/go flume      # switch to the global flume buffer
Buffer numbers are shown in the buffer list panel (e.g., 1.server, 2.#rust). Partial matching is case-insensitive and matches anywhere in the name.

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/buffer

/buffer [name]
With no args: list all buffers with their numbers and unread counts. 
/buffer
  1: server
  2: #rust (3 unread) *
  3: #flume
With a name: switch to that buffer. 
/buffer #rust     # switch to #rust
/buffer server    # switch to server buffer

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/switch

/switch <server>
Switch to a different connected server. Your buffer position within each server is remembered.

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/close

/close
Close the active buffer and switch to the previous one. Channels are also auto-closed when you /part.

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/clear

/clear
Clear the active buffer’s message history. The buffer stays open.

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/search

/search [pattern]
Search the active buffer for a text pattern. All matching lines are highlighted with the search_match_bg/search_match_fg theme colors. 
/search error      # highlight all lines containing "error"
/search            # clear search highlighting
Searching is case-insensitive. Use /search with no args to clear.

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/url

/url
/url <N>
/url open <N>
Manage URLs detected in the active buffer. 
/url               # list last 10 URLs with nick attribution
/url 1             # open the most recent URL in your browser
/url open 3        # open the 3rd most recent URL
URLs are automatically detected in messages and rendered in the chat_url theme color with underline. The /url command lets you list and open them without scrolling. The browser command is configurable: 
/set general.url_open_command open       # macOS (default)
/set general.url_open_command xdg-open   # Linux (default)

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/emoji

/emoji [search]
Search emoji shortcodes or show usage info. 
/emoji             # show usage and common examples
/emoji fire        # search: shows 🔥 :fire:
/emoji heart       # search: shows all heart variants
Using emoji in messages: Type :shortcode: and it’s replaced with the emoji when you send: 
:thumbsup: → 👍    :fire: → 🔥    :wave: → 👋
:heart: → ❤️       :rocket: → 🚀   :100: → 💯
:tada: → 🎉       :coffee: → ☕   :crab: → 🦀
Tab completion: Type :thu then press Tab to cycle through matches (:thumbsup: → 👍, :thumbsdown: → 👎). Works alongside nick completion — emoji triggers when the word starts with :. 160+ shortcodes available covering smileys, gestures, hearts, symbols, tech, food, nature, animals, celebrations, and flags.

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/help

/help [command]
With no args: show the full categorized command list. With a command name: show detailed help for that specific command. 
/help              # full command list
/help go           # help on /go
/help set          # help on /set with all settings
/help server       # help on /server with auth examples
/help split        # help on split views
/help generate     # help on AI generation
/help theme        # help on themes with path info
Also shows help text for script-registered commands — scripts provide help via flume.command.register(name, fn, "help text").