Nightshift is a CLI that installs and runs Coding Agents in isolated, reproducible, and sandboxed environments. It also provides utilities for Agent Routines and Evaluations.As Coding Agents like OpenCode, Claude Code, and Cursor become more capable, a new generation of agents is emerging with access to host computers and able to perform actions and maintain code on the user’s behalf. Nightshift provides a portable, agent-agnostic toolchain that makes it easy to configure environments for these agents while giving them the ability to bootstrap themselves.Nightshift was designed to support distribution of Coding Agents to non-technical users, giving the agent the environment it needs to do its job, personalization and sustainability through Agent routines, while ensuring safety for the host machine through sandboxing.