virtualenv 3

DeepSeek Harness plugin: workspace-scoped Python virtual environment management for agents (pyenv_discover / pyenv_create / pyenv_install / pyenv_uninstall / pyenv_remove). Runs the standard library python -m venv / pip through the host subprocess channel

Per-project runtime environments for DeepSeek Harness: auto-adopt or create a project-local Python venv (.venv_local/python) and wire in the toolchains/env vars for the runtimes each project uses.

Per-project runtime environments for DeepSeek Harness: auto-adopt or create a project-local Python venv (.venv_local/python) and wire in the toolchains/env vars for the runtimes each project uses.