A scrolling terminal multiplexer that tracks your AI coding agents.
Séance is a GTK4 terminal multiplexer for Linux. It auto-detects Claude Code, Codex, and Pi sessions running inside it and tracks their status (working, waiting for permission, idle) live in the sidebar. Permission requests and task completions are surfaced as desktop notifications with unread tracking. Zero configuration, no dotfile edits: open an agent in a pane and it is tracked.
GTK4 and libadwaita, so it integrates with the rest of GNOME and with tiling WM setups. X11 and Wayland. Blur and transparency on both. GPU-accelerated terminal rendering via libghostty (Ghostty used as a library).
Panes are arranged in a horizontal strip that you scroll through, borrowing the layout model from niri. Fits long, linear agent sessions better than a tiling grid, and lines up naturally with scrolling tiling WMs.
Claude Code, Codex, and Pi are auto-tracked out of the box. Adding support for another agent is a hook config PR rather than a rewrite. Agents that do not speak hooks still get all the plain multiplexer features.
Every action is available through seance ctl, which talks to the running instance over a Unix domain socket. Scripts and AI agents can create workspaces, open panes, send input, read terminal output, and query the full session hierarchy. All commands support JSON output.
A bundled skill file provides AI agents with a complete reference for the seance ctl API, so they can use the multiplexer on their own.
Workspaces, session persistence across restarts, tabs within columns, a command palette, focus-follows-mouse, and no telemetry.
yay -S seanceTo run it directly without installing:
nix run "git+https://github.com/no1msd/seance?submodules=1"To install it persistently into your profile:
nix profile install "git+https://github.com/no1msd/seance?submodules=1"Both commands compile from source on the first run and cache the result in the Nix store.
Non-NixOS users: EGL won't initialize without a GL wrapper. On Intel/AMD use
nixGL:nix run --impure github:nix-community/nixGL#nixGLIntel -- \ nix run "git+https://github.com/no1msd/seance?submodules=1"On Nvidia use
nix-gl-host, since nixGL's Nvidia wrapper breaks on recent drivers:nix run github:numtide/nix-gl-host -- \ $(nix build --no-link --print-out-paths \ "git+https://github.com/no1msd/seance?submodules=1")/bin/seance
Download the latest seance-*-x86_64.AppImage from GitHub Releases, make it executable, and run it:
chmod +x seance-*-x86_64.AppImage
./seance-*-x86_64.AppImageRequires libfuse2 on the host. Uses the host's libGL/libEGL, so Mesa or proprietary GPU drivers must be installed.
To use seance ctl from your shell, move the AppImage onto your PATH:
mv seance-*-x86_64.AppImage ~/.local/bin/seanceRequires Zig 0.15.2+, GTK4, libadwaita, OpenGL 4.3+, and Linux (X11 or Wayland).
git clone --recursive https://github.com/no1msd/seance.git
cd seance
zig buildThe binary is at zig-out/bin/seance.
Bug reports, feature requests, and pull requests are welcome. See CONTRIBUTING.md for how to file issues, build locally, and add support for new agents. Questions and show-and-tell go in Discussions. Security issues should be reported privately, see SECURITY.md.
