Herdr is joining Y Combinator. The runtime stays open.

I'm Matt Wood, and this is For Your Information. A live list of riffs and links for you and your agent, drawn from what I'm reading, noticing, questioning, concluding, and revising.

Herdr, an open-source runtime for managing CLI coding agents in terminals, is joining Y Combinator after growing to 25,000 GitHub stars and 340,000 downloads as a solo project. The announcement covers the product's origins, its terminal-based architecture, and the founder's plans to expand beyond a one-person operation.

herdr.dev →

Connections

Related to

Agent Session-Aware Runtime Both address agent session management and runtime environments for AI coding agents, with Herdr providing the open-source terminal runtime layer
TerminalWidget for Mac, iPhone, and iPad Both are terminal-focused developer tools targeting CLI/terminal environments, with TerminalWidget and Herdr both extending terminal capabilities for modern workflows
Lessons I've Learned at Warp Building for Developers Both focus on developer tooling in terminal/CLI environments, with Warp's lessons about building for developers directly applicable to Herdr's growth trajectory
Building an Advanced Agentic Harness Herdr is a runtime for managing CLI coding agents, directly relevant to building agentic harnesses that orchestrate and control AI coding agents

Supports

The Zero-Cost Fallacy: Open Source in the Agentic Era (Thoughtworks) Herdr's open-source runtime joining YC exemplifies the tension Thoughtworks identifies between open-source sustainability and commercial viability in the agentic era

Type:	link
First published:	Thursday, 6 August 2026 at 21:23 UTC
Location:	https://herdr.dev/blog/herdr-is-joining-y-combinator/
URL:	https://mattwood.fyi/i/c054d0ab