$ ssh prod-box-7
$ vim deploy.yaml
$ connection lost.
$ vim deploy.yaml
$ connection lost.
Interactive tools assume a person at an interface. Close the lid and the state evaporates — scrollback, context, the half-finished thought.
multiplexed 0
dropped 0/5
q / esc — quit
tail -f /var/log/work.log
this terminal works. type , split it with , leave with and come back — it will still be here. that’s the whole idea.
$ sl status --all
One job. Three silos.
Zero shared memory.
job #4812 … FAILED
log rotated away
context: none
log rotated away
context: none
Automatic work disappears into jobs and logs. CI, cron, agents working in parallel — running blind, reporting to no one.
$ kubectl exec …
permission: separate system
history: elsewhere
permission: separate system
history: elsewhere
As work moves to production it lives behind separate systems and controls, observed through dashboards that forget everything.
Building and operating software today spans local machines, remote hosts, sandboxes, services, and production systems. This work is all related — yet today’s tools divide it into separate systems.
AI makes this fragmentation more visible and costly, but it did not create it. System administration, continuous integration, remote development and collaboration have strained the same boundaries for decades.
$ man superlogical
The missing layer is a
durable session around the work itself.
A multiplexer brings multiple independent streams together through a common interface. For us, that means interactive work, automatic work, and production work sharing one well-crafted underlying system — instead of living in separate tools.
One that can span applications and environments, provide relevant context by default, expose structured data and actions, preserve history, and be driven by software while remaining visible and controllable by people.
$ git log --oneline --plan
The plan, shipped like software.
Build an incredible multiplexer.
- long-lived sessions: close the app, reconnect from another device, pick up exactly where you left off
- web + native macOS/iOS access from day one
- live session sharing built in, not bolted on
- scrollback, selection and scrolling that work natively — the classic papercuts, fixed
Make everything in it composable.
- structured data and actions over every block of work
- sessions scriptable by software, observable by people
Make it safe and operable in production.
- controls, audit and history that survive the incident review
- the same session, from laptop to fleet
A terminal multiplexer may sound like a narrow place to start a company. Our vision is much larger — but terminals connect developers, agents, tools, and infrastructure, so it is the right foundation for everything that follows. It will remain excellent at that job, even as it grows to support the second and third parts of the plan.
$ sl share --live
First: a terminal multiplexer
with multiplayer in its bones.
$ man -k founders
People who have shipped
the tools you already trust.
NAME
mitchell — creator of Ghostty, co-founder of HashiCorp
SYNOPSIS
mitchell [ghostty] [hashicorp] [vagrant] [terraform] [vault]
DESCRIPTION
Co-founded HashiCorp and created Vagrant, Terraform, Vault, and more. Spent more than a decade as CEO and CTO from its earliest days through its IPO.
SEE ALSO
NAME
jack — first employee, VP of Engineering & R&D at HashiCorp
SYNOPSIS
jack [hashicorp#1] [eng] [r&d]
DESCRIPTION
Helped to create HashiCorp’s first products and hired and led the original engineering team.
SEE ALSO
NAME
alasdair — Head of Experience at Poolside, VP of Design at Vercel
SYNOPSIS
alasdair [poolside] [vercel] [hashicorp] [heroku]
DESCRIPTION
Two decades spent designing and building interfaces for developers, as a senior design leader at HashiCorp and Heroku.
NAME
hector — designed apps, services, and agentic experiences at Poolside
SYNOPSIS
hector [poolside] [heroku] [hashicorp] [clearbit] [vercel]
DESCRIPTION
An interface designer and builder who has shipped developer-first products at Heroku, HashiCorp, Clearbit, and Vercel.
$ sl funders --list
Backed by people who know
what this layer is worth.
- Notable Capital
- Amplify Partners
- Aaron Levie
- Armon Dadgar
- Dax Raad
- Greg Foster
- Guillermo Rauch
- Jacob Thornton
- Mario Zechner
$ sl join --beta
The beta opens in small batches. Leave an email and we’ll attach you to a session when it’s your turn.
stored on this device for the demo — the real list lives at superlogical.com.