Install the Rust stable toolchain and the native dependencies for your platform:

# macOS
xcode-select --install
brew install cmake pkg-config
brew install nasm # Intel only

# Fedora
sudo dnf install alsa-lib-devel clang-devel cmake gcc gcc-c++ libva-devel nasm pipewire-devel pkgconf-pkg-config

# Debian or Ubuntu
sudo apt install build-essential cmake libasound2-dev libclang-dev libpipewire-0.3-dev libva-dev nasm pkg-config

# Arch Linux
sudo pacman -S alsa-lib base-devel clang cmake libva mesa nasm pipewire pkgconf

Windows source builds require the MSVC Rust toolchain, Visual Studio 2022 Build Tools with Desktop development with C++, CMake, and NASM.

git clone https://github.com/chojs23/concord.git
cd concord
cargo build --release

To keep voice support without stream broadcasting:

cargo build --release --no-default-features --features voice-playback

To build without local voice playback, microphone, or stream broadcasting:

cargo build --release --no-default-features

The same feature flags can be passed to cargo install concord --locked.

[display]
# Image protocol: auto, iterm2, kitty, sixel, or halfblocks.
image_protocol = "auto"

# Master switch that hides all image previews when true.
disable_image_preview = false

# Show user avatars next to messages and in profile views.
show_avatars = true

# Render inline image previews for attachments and embeds.
show_images = true

# Allow video and audio media to open in an external player.
media_playback = false

# Preview quality: efficient, balanced, high, or original.
image_preview_quality = "balanced"

# Attachment viewer quality: efficient, balanced, high, or original.
attachment_viewer_quality = "original"

# Which animated GIF and WebP previews keep playing: always, selected, or never.
# Each animated frame rebuilds a terminal graphics protocol, so "always" costs
# roughly 8% of a CPU core per animated preview on screen. Custom emoji animate
# regardless; theirs are small enough not to matter.
animate_previews = "always"

# Render custom Discord emoji as images when possible.
show_custom_emoji = true

# Crop avatars into circles instead of showing square images.
circular_avatars = false

# Show message times in 24-hour format (14:30) instead of 12-hour (02:30 PM).
hour_format_24 = true

[composer]
# Send custom emoji your account cannot use directly as image links.
emojis_as_links = false

[reactions]
# Up to 10 unicode emoji pinned at the top of the reaction picker.
# When unset or empty, Concord uses the built-in quick reactions.
# favorite_emojis = ["🔥", "👍", "❤️", "😂", "🎉", "😮", "😢", "🙏", "👀", "💯"]

[presence]
# Relay Rich Presence from local apps as your activity (most recent app wins,
# like the native client).
share_rich_presence = true

[translation]
# Translate selected messages and composer drafts when their target is set.
# Supported providers: deepl or libretranslate.
# provider = "deepl"
# message_target_language = "KO"
# composer_target_language = "EN"

# Optional full API endpoint override. DeepL defaults to its Free API endpoint.
# LibreTranslate defaults to http://127.0.0.1:5000/translate.
# endpoint = "https://api.deepl.com/v2/translate"

# Optional API key stored directly in this private config file.
# api_key = "your-api-key"

# Optional environment variable containing the API key. When set, its value
# overrides api_key. DeepL checks DEEPL_API_KEY by default.
# api_key_env = "DEEPL_API_KEY"

[credentials]
# Credential storage: auto, keychain, or plain.
# auto tries the system keychain first and falls back to the state file.
store = "auto"

[notifications]
# Show desktop notifications for Discord messages that pass notification rules.
desktop_notifications = true

# Optional notification icon to include in notifications. May not work on all platforms.
# When unset, no icon is used. It must either be a name of an icon (typically in /usr/share/icons)
# or a path to an icon.
# notification_icon = "/path/to/icon.svg"

# Optional WAV files for message, voice join/leave notification sounds.
# When unset, Concord uses built-in generated tones.
# notification_sound = "/path/to/message.wav"
# voice_join_sound = "/path/to/join.wav"
# voice_leave_sound = "/path/to/leave.wav"

[voice]
# Join or update Discord voice with Concord self-muted.
self_mute = false

# Join or update Discord voice with Concord self-deafened.
self_deaf = false

# Optional CPAL device IDs chosen from Voice Options. When omitted or no longer
# available, Concord uses the current system default input or output device.
# input_source = "CoreAudio:input-id"
# output_source = "CoreAudio:output-id"

# Allow microphone transmit while this session is joined and not self-muted.
allow_microphone_transmit = false

# Require holding the configured shortcut to transmit.
push_to_talk = false

# Global push-to-talk shortcut. The key works even when Concord is not focused.
# Modifiers can be combined before the key, for example "control+shift+F8".
push_to_talk_shortcut = "F8"

# Reduce steady background microphone noise.
noise_suppression = true

# Optional microphone capture buffer duration in milliseconds, from 10 to 60.
# When omitted, Concord requests 50ms on Linux and 10ms on other platforms,
# clamped to the device's supported range. It uses the host default only when
# the range is unknown or the platform fixed buffer cannot be opened.
# Setting a value forces that fixed duration.
# microphone_buffer_ms = 50

# Voice activity threshold in dB. Lower values transmit quieter input.
microphone_sensitivity = -30

# Microphone input volume percentage, from 0 to 200.
microphone_volume = 100

# Received voice playback volume percentage, from 0 to 200.
voice_output_volume = 100

macOS may require Input Monitoring permission for Concord or the terminal that started it. On Linux Wayland, the compositor manages global shortcuts, so Concord cannot guarantee that the shortcut input also reaches the focused application.

[keymap]
leader = "space"
StartComposer = "i"
OpenPaneFilter = "/"
ClosePopup = "q"
OpenDebugPanel = "`"
FocusGuildPane = "1"
FocusChannelPane = "2"
FocusMessagePane = "3"
FocusMemberPane = "4"
SelectNext = "j"
SelectPrevious = "k"
CycleFocusNext = { keys = ["tab", "l", "right"] }
CycleFocusPrevious = { keys = ["<S-tab>", "h", "left"] }
HalfPageDown = "<C-d>"
HalfPageUp = "<C-u>"
ScrollViewportDown = "J"
ScrollViewportUp = "K"
JumpTop = "gg"
JumpBottom = "G"
ScrollHorizontalLeft = "H"
ScrollHorizontalRight = "L"
ResizePaneLeft = { keys = ["<A-h>", "<A-left>"] }
ResizePaneRight = { keys = ["<A-l>", "<A-right>"] }
Quit = "q"
CopyMessage = "y"
TranslateMessage = "T"
ReactMessage = "r"
ReplyMessage = "R"
DeleteMessage = "d"
EditMessage = "e"
OpenMessageUrl = "o"
PlayMedia = "x"
ViewMessageAttachment = "v"
ToggleGuildPane = "<leader>1"
ToggleChannelPane = "<leader>2"
ToggleMemberPane = "<leader>4"
OpenFocusedPaneAction = "<leader>a"
OpenCurrentUserProfile = "<leader>p"
OpenOptions = "<leader>o"
OpenNotificationInbox = "<leader>n"
RefreshScreen = "<leader>r"
ChannelSwitcher = "<leader><leader>"
VoiceDeafen = "<leader>vd"
VoiceMute = "<leader>vm"
ToggleStream = "<leader>vs"
VoiceLeave = "<leader>vl"

[keymap.groups]
"<leader>v" = "Voice"

[keymap.notification_inbox_actions]
MarkRead = "r"
MarkAllRead = "a"

[keymap.guild_actions]
MarkAsRead = "m"
ToggleMute = "u"
LeaveServer = "l"
FolderSettings = "r"

[keymap.channel_actions]
JoinVoice = "e"
LeaveVoice = "l"
ToggleStream = "s"
WatchStream = "w"
VoiceParticipantAudio = "a"
ShowPinnedMessages = "p"
ShowThreads = "t"
MarkAsRead = "m"
ToggleMute = "u"

[keymap.message_actions]
CopyMessage = "y"
TranslateMessage = "T"
ReactMessage = "r"
ReplyMessage = "R"
DeleteMessage = "d"
EditMessage = "e"
OpenMessageUrl = "o"
RemoveMessageEmbeds = "D"
PlayMedia = "x"
ViewMessageAttachment = "v"
GoToReferencedMessage = "g"
ShowMessageProfile = "p"
PinMessage = "P"
OpenThread = "t"
ShowReactionUsers = "u"
OpenPollVotePicker = "c"

[keymap.member_actions]
ShowProfile = "p"

[keymap.thread_actions]
MarkAsRead = "m"
ToggleFollow = "f"
Close = "c"
Lock = "l"
Edit = "e"
CopyLink = "y"
ToggleMute = "u"
NotificationSettings = "n"
Pin = "P"
Delete = "d"
CopyId = "i"

[keymap.composer]
OpenEditor = "<C-e>"
PasteClipboard = "<C-v>"
InsertNewline = { keys = ["<C-j>", "<S-enter>", "<C-enter>", "<A-enter>"] }
Submit = "enter"
Close = "esc"
ClearInput = "<C-c>"
RemoveLastAttachment = "delete"
TranslateComposer = "<C-t>"
OpenGifPicker = "<C-g>"
DeletePreviousChar = "backspace"
DeletePreviousWord = { keys = ["<A-backspace>", "<C-backspace>", "<C-w>"] }
DeleteToLineStart = "<C-u>"
DeleteToLineEnd = "<C-k>"
MoveCursorUp = "up"
MoveCursorDown = "down"
MoveCursorWordLeft = "<C-left>"
MoveCursorLeft = "left"
MoveCursorWordRight = "<C-right>"
MoveCursorRight = "right"
MoveCursorHome = "home"
MoveCursorEnd = "end"
ToggleReplyPing = "<A-p>"

# Complete Highlight Group reference with Concord's built-in defaults.
# Copy this configuration to `theme.toml` in the Concord config directory,
# then keep only the groups you want to override.
#
# A group accepts `link`, `foreground`, `background`, `bold`, `italic`, `dim`,
# `underline`, and `strikethrough`. Colors accept `none`, `terminal_default`, a
# canonical lowercase ANSI name, or six-digit RGB such as `#39ff14`. `none`
# clears that color channel after inheritance. A linked group inherits fields
# it does not set. Use `link = "none"` to detach a built-in link.

# Border shapes are UI geometry rather than Highlight Group styles. An omitted
# surface uses `default`. These values reproduce Concord's built-in layout.
[ui.border]
default = "plain"
composer = "rounded"
message = "rounded"
forum = "rounded"

# Selection markers are UI glyphs. This value is shared by list panes and
# pickers, while `highlight.SelectionMarker` controls its style.
[ui.indicator]
selection = "▸ "

[highlight.Normal]
foreground = "terminal_default"
background = "terminal_default"

[highlight.Strong]
bold = true

[highlight.Emphasis]
italic = true

[highlight.Muted]
dim = true

[highlight.Title]
link = "Strong"

[highlight.Heading]
link = "Strong"

[highlight.Decoration]
link = "Muted"

[highlight.Hint]
link = "Muted"

[highlight.Description]
link = "Muted"

[highlight.Shortcut]
link = "Muted"

[highlight.Activity]
link = "Muted"

[highlight.ChannelTypeMarker]
link = "Muted"

[highlight.FieldLabel]
link = "Muted"

[highlight.SearchContext]
link = "Muted"

[highlight.Timestamp]
link = "Muted"

[highlight.Placeholder]
link = "Muted"

[highlight.Disabled]
link = "Muted"

[highlight.Loading]
link = "Muted"

[highlight.Edited]
link = "Muted"
italic = true

[highlight.Unavailable]
link = "Muted"
strikethrough = true

[highlight.LoginTitle]
link = "Title"
foreground = "cyan"

[highlight.LoginHint]
link = "Muted"

[highlight.PaneTitle]
link = "Title"

[highlight.ModalTitle]
link = "Title"

[highlight.ComposerTitle]
link = "Title"

[highlight.HeaderTitle]
link = "Title"
foreground = "cyan"

[highlight.HeaderLabel]
link = "Muted"

[highlight.MessageAuthor]
link = "Strong"

[highlight.MessageTimestamp]
link = "Timestamp"

[highlight.CategoryHeading]
link = "Heading"

[highlight.MemberGroupHeading]
link = "Heading"

[highlight.MessageSecondary]
link = "Muted"

[highlight.ForumSecondary]
link = "Muted"

[highlight.EmbedAuthor]
link = "Emphasis"

[highlight.EmbedTitle]
link = "Strong"
foreground = "blue"

[highlight.EmbedFieldName]
link = "Strong"
underline = true

[highlight.EmbedFooter]
link = "Muted"
italic = true

[highlight.CodeBlockBorder]
link = "Border"
dim = true

[highlight.ScrollbarTrack]
link = "ScrollbarThumb"
dim = true

[highlight.UnavailableEmoji]
link = "Unavailable"

[highlight.HeaderError]
link = "Error"
bold = true

[highlight.HeaderWarning]
link = "Warning"
bold = true

[highlight.Border]
foreground = "dark_gray"

[highlight.FocusBorder]
foreground = "cyan"

[highlight.Selection]
foreground = "cyan"
background = "none"
bold = true
dim = false

[highlight.SelectionBorder]
foreground = "green"
bold = true

[highlight.PaneBorder]
link = "Border"

[highlight.FocusedPaneBorder]
link = "FocusBorder"
bold = true

[highlight.LoginBorder]
link = "FocusBorder"

[highlight.ComposerBorder]
link = "Border"

[highlight.ActiveComposerBorder]
link = "FocusBorder"
bold = true

[highlight.ModalBorder]
link = "FocusBorder"
bold = true

[highlight.ComposerPickerBorder]
link = "FocusBorder"

[highlight.SelectedRow]
link = "Selection"

[highlight.SelectionMarker]
link = "Selection"

[highlight.ActiveField]
foreground = "cyan"
bold = true

[highlight.ActiveTab]
link = "Selection"

[highlight.MessageSelectedBorder]
link = "SelectionBorder"

[highlight.ForumBorder]
link = "FocusBorder"

[highlight.ForumSelectedBorder]
link = "SelectionBorder"

[highlight.ScrollbarThumb]
foreground = "#AAAAAA"

[highlight.UnreadNotice]
foreground = "cyan"
bold = true

[highlight.Editing]
foreground = "yellow"

[highlight.Reaction]
foreground = "cyan"

[highlight.SelfReaction]
foreground = "yellow"

[highlight.PresenceOnline]
foreground = "green"

[highlight.PresenceIdle]
foreground = "#B48C00"

[highlight.PresenceDnd]
foreground = "red"

[highlight.PresenceOffline]
link = "Normal"
dim = true

[highlight.VoiceDisabled]
foreground = "yellow"

[highlight.VoiceConnection]
foreground = "yellow"
bold = true

[highlight.FolderFallback]
foreground = "cyan"

[highlight.NavigationActive]
foreground = "green"
bold = true

[highlight.NavigationMentioned]
foreground = "#FFA500"

[highlight.NavigationNotified]
foreground = "terminal_default"

[highlight.NavigationUnread]
foreground = "terminal_default"

[highlight.MentionBadge]
foreground = "#FFA500"

[highlight.NotificationBadge]
foreground = "terminal_default"

[highlight.JoinedVoiceChannel]
foreground = "yellow"
bold = true

[highlight.VoiceSpeaking]
foreground = "green"
bold = true

[highlight.ReplyPingEnabled]
foreground = "cyan"

[highlight.Tag]
foreground = "cyan"

[highlight.RelationshipFriend]
foreground = "green"

[highlight.RelationshipIncoming]
foreground = "yellow"

[highlight.RelationshipOutgoing]
foreground = "yellow"

[highlight.RelationshipBlocked]
foreground = "red"

[highlight.RelationshipNone]
foreground = "terminal_default"
dim = true

[highlight.GaugeFill]
foreground = "cyan"

[highlight.MessageBody]
foreground = "terminal_default"

[highlight.MarkdownHeading1]
link = "Heading"
foreground = "cyan"

[highlight.MarkdownHeading2]
link = "Heading"
underline = true

[highlight.MarkdownHeading3]
link = "Heading"

[highlight.MarkdownQuote]
foreground = "dark_gray"

[highlight.MarkdownMarker]
foreground = "dark_gray"

[highlight.MessageAttachment]
foreground = "cyan"

[highlight.ImageOverflow]
link = "MessageAttachment"
bold = true

[highlight.InlineCode]
foreground = "#FFA500"

[highlight.InlineTimestamp]
foreground = "#DBDEE1"
background = "#3B3C43"

[highlight.MessageLink]
foreground = "cyan"
underline = true

[highlight.MentionSelf]
foreground = "yellow"
background = "#5C4C23"

[highlight.MentionOther]
foreground = "#C1CEF7"
background = "#28325C"

[highlight.MentionRole]
# Discord supplies the foreground and a darker role-color background by default.
# This group controls colored role mentions that do not notify the current user.
# Notifying role mentions use MentionSelf with the Discord role foreground.

[highlight.MentionPickerRole]
foreground = "magenta"

[highlight.EmbedGutter]
foreground = "red"

[highlight.EmbedLink]
foreground = "blue"
underline = true

[highlight.CommandName]
link = "MessageSecondary"
foreground = "#5865F2"

[highlight.SystemThreadName]
foreground = "cyan"
bold = true

[highlight.PollAnswerSelected]
foreground = "terminal_default"
bold = true

[highlight.PollWinner]
foreground = "terminal_default"
bold = true

[highlight.UnreadBanner]
foreground = "terminal_default"
background = "#5865F2"

[highlight.UnreadDivider]
foreground = "#ED4245"

[highlight.ForumPinnedBadge]
foreground = "yellow"
bold = true

[highlight.BotBadge]
link = "Normal"
background = "#5865F2"
bold = true

[highlight.Error]
foreground = "red"

[highlight.Warning]
foreground = "yellow"

[highlight.Success]
foreground = "green"

[highlight.Info]
foreground = "cyan"