Séance

Free plan Linux

What Séance is

Séance is a free Linux terminal multiplexer that tracks AI coding agent sessions. It follows Claude Code, Codex, Pi, OpenCode, and Antigravity CLI sessions, and shows whether each is working, waiting for permission, or idle. Permission requests and task completions can appear as desktop notifications, with unread tracking. Its horizontally scrolling pane layout includes workspaces, tabs within columns, a command palette, focus-follows-mouse, and session persistence across restarts. Séance uses GTK4, libadwaita, and libghostty, and supports X11 and Wayland, with blur and transparency. The `seance ctl` command connects to the running app over a Unix domain socket; commands support JSON output and can manage workspaces and panes, send input, and read terminal output. The project states that it has no telemetry and uses the MIT license. The maker lists Arch Linux AUR, Nix flake, and x86_64 AppImage installation options. OpenCode remote attach sessions and `--pure` launches are not tracked. Séance is pre-1.0, and security fixes support only the latest released version.

Who it suits

Séance suits Linux users who want to monitor coding-agent sessions alongside terminal work. Its command interface may also suit users managing workspaces and panes programmatically.

What it does well

Tracks five named agent integrations
Shows working, permission-waiting, and idle states
Notifications include unread tracking
Sessions persist across restarts
No telemetry stated by the project

What to know first

Linux desktop only
OpenCode remote attach sessions are not tracked
`--pure` launches are not tracked
Only the latest release receives security fixes

Limits

Séance is free, with no paid plan listed. OpenCode remote attach sessions and `--pure` launches are not tracked; security fixes apply only to the latest released version.

Plans

Plan	Billed and limits	Price
Free and open source	Linux · X11 or Wayland · MIT license	Free

As no1msd.github.io lists them, read 8 Oct 2026. The maker's own page has the final word.

Getting started

Choose an installation route: Arch Linux AUR, Nix flake or x86_64 AppImage.
Install Séance on Linux with X11 or Wayland.
Launch the app and open supported coding agent sessions to have them tracked.
Use workspaces and panes in the app, or connect `seance ctl` to the running instance over its Unix domain socket.

Verdict

Séance combines a scrolling terminal layout with session status, alerts, and a command interface. Note its Linux scope, unsupported OpenCode session types, and pre-1.0 security support limit.

Questions

How much does Séance cost?

Séance is free. The listed plan is free.

Which operating systems and display systems does it support?

It supports Linux desktop with X11 or Wayland. An x86_64 AppImage is one of the listed installation options.

Which agent sessions does it track?

It tracks Claude Code, Codex, Pi, OpenCode and Antigravity CLI sessions. OpenCode remote attach sessions and `--pure` launches are not tracked.

Is Séance open source?

The project states that it is licensed under MIT.

Does Séance synchronize sessions or support collaboration?

Session synchronization and collaboration features are listed as unavailable. Persistence is local.

How can I install or get support for Séance?

The maker lists Arch Linux AUR, Nix flake and x86_64 AppImage installation options. Bug reports, feature requests and pull requests are welcomed, and questions can go to GitHub Discussions.

Facts from Séance's own pages

Additional integrations: Release notes list OpenCode and Antigravity CLI session status tracking and notifications. · github.com, 7 Oct 2026
Agent integrations: It auto-tracks Claude Code, Codex, Pi, OpenCode and Antigravity CLI sessions. · github.com, 8 Oct 2026
Agent tracking: It automatically tracks Claude Code, Codex, and Pi sessions, showing whether they are working, waiting for permission, or idle. · github.com, 7 Oct 2026
Automation: The seance ctl command communicates with the running app over a Unix domain socket; commands support JSON output and can manage workspaces and panes, send input, and read terminal output. · github.com, 7 Oct 2026
Automation API: The seance ctl command communicates with the running instance over a Unix domain socket; commands support JSON output. · github.com, 8 Oct 2026
Compatibility limit: The maker says OpenCode remote attach sessions and --pure launches are not tracked. · github.com, 8 Oct 2026
Installation: The maker lists Arch Linux AUR, Nix flake, and x86_64 AppImage installation options. · github.com, 7 Oct 2026
Install options: The maker documents Arch Linux AUR, Nix flake and x86_64 AppImage installation options. · github.com, 8 Oct 2026
License: Séance is released under the MIT license. · github.com, 8 Oct 2026
Live status: The sidebar tracks whether sessions are working, waiting for permission or idle. · github.com, 8 Oct 2026
Notifications: Permission requests and task completions appear as desktop notifications with unread tracking. · github.com, 8 Oct 2026
Other features: It includes workspaces, session persistence across restarts, tabs within columns, a command palette, focus-follows-mouse, and no telemetry. · github.com, 7 Oct 2026
Privacy: The project states that Séance has no telemetry. · github.com, 8 Oct 2026
Purpose: Séance is a scrolling terminal multiplexer that tracks AI coding agent sessions. · github.com, 8 Oct 2026
Requirements: Building from source requires Zig 0.16.x, GTK4, libadwaita, OpenGL 4.3+ and Linux. · github.com, 8 Oct 2026
Security reporting: The security policy asks users to report security issues privately through GitHub and says reports are acknowledged within 72 hours. · github.com, 7 Oct 2026
Security reports: The security policy asks for private vulnerability reports and says the maintainer aims to acknowledge them within 72 hours. · github.com, 8 Oct 2026
Security support limit: Séance is pre-1.0, and only the latest released version is supported with security fixes. · github.com, 7 Oct 2026
Session features: It includes workspaces, session persistence across restarts, tabs within columns, a command palette and focus-follows-mouse. · github.com, 8 Oct 2026
Support: The maker welcomes bug reports, feature requests, and pull requests, and directs questions and show-and-tell to GitHub Discussions. · github.com, 7 Oct 2026
Support status: Séance is pre-1.0 and only the latest released version is supported with security fixes. · github.com, 8 Oct 2026
Terminal and display: It uses GTK4, libadwaita and libghostty, with X11 and Wayland support, blur and transparency. · github.com, 8 Oct 2026
Terminal and layout: It uses GTK4, libadwaita, and libghostty, and supports X11 and Wayland with a horizontally scrolling pane layout. · github.com, 7 Oct 2026

Where Séance stands on Freedom251

Terminal Multiplexers#22 of 29