slk

A blazingly fast Slack TUI.

Keyboard-driven, beautifully themed, and under 20MB. One static binary. No Electron required.

> Marketing site: getslk.sh · Docs: Wiki

!slk demo: navigating channels, live messages, a split window and switching workspaces

slk is a daily-driver replacement for the official Slack desktop client, built in Go with bubbletea and lipgloss.

Why slk?

• Fast. Cold start in milliseconds. Render-cached messages. SQLite-backed scrollback. Real-time over WebSocket.
• Tiny. ~19 MB on disk. ~60 MB RSS for a live multi-workspace session vs. 500 MB–1.5 GB for the official client. No node_modules, no Chromium, no 1Gb RAM tax.
• Keyboard-first. Vim-style modal editing. j/k, h/l, i, Esc.
• Pretty. 59 built-in themes, lipgloss-styled panels, true-pixel avatars on kitty (half-block fallback elsewhere), emoji shortcodes, day separators, and pill-style reactions.
• Multi-workspace. All your workspaces stay connected in parallel. 1–9 to instantly jump between them, with live unread badges in the rail.
• Yours. TOML config, custom themes, custom channel sections via glob, XDG-compliant paths.

Highlights

• Real-time messages, edits, deletes, reactions, typing indicators
• Inline images (kitty graphics / sixel / half-block fallback) with full-screen preview
• Threads side panel + a workspace-wide threads view
• Activity feed: mentions, thread replies, reactions, and DMs in one list, like Slack's Activity tab
• Smart paste: clipboard images, file paths, or text — multiple attachments + caption in one send
• Slack-native sidebar sections, kept live; or glob-based config sections
• Automatic auth from the Slack desktop app — no tokens to copy, no Slack App required
• Vim-style modal keybindings, fuzzy channel finder, workspace picker
• 59 themes + drop-in custom themes, live theme switcher
• OS desktop notifications on DMs, mentions, and configurable keywords

Quick install

Homebrew (macOS and Linux):

brew install --cask gammons/tap/slk

Arch Linux (community-maintained AUR package):

yay -S slk

Go:

go install -ldflags="-s -w" -trimpath github.com/gammons/slk/cmd/slk@latest

For tarballs, .deb / .rpm / .apk packages, Windows, build-from-source, and the Homebrew formula→cask migration note, see the Installation wiki page.

Setup

slk reads your session directly from the Slack desktop app — no DevTools, no tokens to copy. Make sure you're signed in to the desktop app, then:

slk --add-workspace

slk lists the workspaces you're signed in to; pick the ones you want and you're done.

No desktop app (a server, a container, an SSH session)? slk --add-workspace --browser signs in from your browser session instead: in DevTools > Network, Copy as cURL any request to /api/ on app.slack.com, and paste it. slk also offers this when it cannot read the desktop app's session.

Full walkthrough: Setup wiki page.

Debugging

Set SLK_DEBUG=1 to enable a comprehensive debug log written to slk-debug.log in the current working directory. The file is truncated each run, so reproduce the issue, quit slk, then copy the file before relaunching. Log lines are categorized ([cache], [imgfetch], [imgrender], [ws], [general]) so grep '\[cache\]' slk-debug.log slices to one focus area.

Documentation

Everything lives in the wiki:

• Installation — prebuilt binaries, Go install, build from source
• Setup — desktop-app auth, adding workspaces
• Features — full feature breakdown
• Keybindings — every key, every mode
• Configuration — config.toml, custom themes, XDG paths
• Terminal Compatibility — what each terminal supports, including tmux setup (inline images, unread-title forwarding)
• Clipboard and OSC 52 — copy/paste setup notes
• Tradeoffs and Non-Goals — roadmap, caveats, TOS notice
• Architecture — service layout, data layer

Contributing

Contributions are welcome. A few ground rules:

• AI-assisted PRs are accepted — and in fact encouraged — but only if

• Ideally, drive the work with the

• For large feature additions, open an issue first. Before sinking

• Whether human- or AI-written, you are responsible for your PR.

Disclaimer

slk is an independent, unofficial project. It is not affiliated with, endorsed by, or sponsored by Slack Technologies, LLC or Salesforce, Inc. "Slack" is a trademark of Slack Technologies, LLC; it is used here only to describe the service this client interoperates with.

slk talks to Slack via the same internal browser protocol the official web client uses. This is unofficial and not sanctioned by Slack — see Tradeoffs and Non-Goals for details.

License

MIT © Grant Ammons