Bombadil

Bombadil is a desktop app for the Python virtual environments you already have. It shows which environments exist, which have drifted from what their pyproject.toml declares, and what is installed in each. It also gives you one place to sync them, look inside them, and open them in a terminal or PyCharm.

It never owns an environment. uv creates them and resolves them, and Bombadil reports on their state and runs uv for you. If you uninstall Bombadil, every environment it showed you is still there, untouched.

Adding a project and a second environment, setting a variable, then opening a terminal and PyCharm with the environment activated.

What you can do with it

• Keep every project in one list. Each project shows its environments as a tree, with the default one marked. A project can have several environments, for example one on Python 3.12 and one on 3.13.
• See which packages, environments and workspace members are present, missing or drifted from what was declared.
• Run uv sync and watch its output stream into a drawer at the bottom of the window. If it fails, the full output stays there.
• Browse the resolved dependency tree, change a version, upgrade one package or all of them, or add a local package.
• In a monorepo, choose which workspace members are installed as editable packages.
• Set environment variables globally or per project. Secrets live in your OS keychain and are never written to the config file.
• Use private package indexes, with their credentials kept in the keychain.
• Open a terminal or PyCharm with the environment already activated.
• Close the window and keep Bombadil in the system tray, which has a menu for every project.

Where to start

1. Install Bombadil.
2. Follow Getting started to add your first project.
3. Read Gotchas before you change a Python version or point PyCharm at an environment.