About Herdr
Herdr is an open-source agent runtime where developers run fleets of coding agents such as Claude Code, Codex, and OpenCode. A background server owns each agent's terminal session so work survives closed laptops and dropped SSH connections. It is built for developers who run many coding agents in parallel across projects.
What is Herdr?
What is Herdr?
Herdr addresses a new problem for developers: running many coding agents at once, sometimes for hours, across laptops, servers, and sandboxes. Herdr runs a background server on each machine that owns the agents' terminal sessions, so work continues through disconnects, closed lids, and dropped SSH sessions.
Herdr detects each agent and organizes them into an attention queue showing which agents are working, blocked, idle, or done across every project, so developers only check in when an agent needs them. Every client is a view onto the same sessions: the bundled terminal UI, SSH from another machine, or a phone. It can also be driven by software through a CLI, a socket API, and a plugin marketplace. Herdr installs with a one-line script on macOS, Linux, and Windows and is licensed under Apache 2.0. Its website reports more than 40,000 GitHub stars, over 1,000 community plugins, and support for 22 agent CLIs.
Herdr is part of Y Combinator's Fall 2026 batch and lists Ankara, Turkey as its location. It was founded in 2026 by Can Celik. In September 2026 it announced a $6 million seed round led by Bessemer Venture Partners.
Pros
- Agent sessions survive disconnects, closed laptops, and dropped SSH
- Attention queue shows which agents are working, blocked, or done
- Open source under Apache 2.0 with a large plugin ecosystem
- Works with many agent CLIs, including Claude Code, Codex, and OpenCode
Cons
- Terminal-centric workflow may not suit developers who prefer GUI IDEs
- Running a background server per machine adds setup for teams
- Company is very new, founded in 2026
How to Use Herdr
- 1Install Herdr
Run the one-line install script from herdr.dev on macOS, Linux, or Windows, or use Homebrew or Nix.
- 2Start your agents
Launch coding agents such as Claude Code or Codex inside Herdr, each in its own terminal and project space.
- 3Watch the attention queue
Let Herdr track which agents are working, blocked, or done, and step in only when needed.
- 4Connect from anywhere
Reconnect from another machine over SSH or from your phone and pick up where the agents left off.