2026.08.07herdr Joins Y Combinator: A Rust Agent Runtime, Not Another tmux14 min read herdr: the agent runtime Three layers. On top, clients: Claude Code, Codex, opencode and a human. Each attaches to the herdr daemon. The daemon owns every terminal session, persists agent state, and is reachable from anywhere through the bundled TUI (herdr --remote self-installs in seconds). Below, the sessions it spawns, one per agent, marked working, blocked or idle, each surviving agent restarts. A terminal pane belongs to an agent; a pane belongs to a tab; tabs belong to a project. herdr: the agent runtime agents attach to a daemon that owns every session and tracks its state attach spawns · owns Claude Code Codex opencode Human herdr daemon owns every session · persists agent state terminal session terminal session terminal session working blocked idle state detected per pane · sessions survive agent restart a terminal pane belongs to an agent · a pane belongs to a tab tabs belong to a project · run them anywhere, keep them running herdr --remote self-installs in seconds
