Module paths 

Filesystem locations used by the CLI and the registry client.

All paths are derived from the XDG_* / HOME environment so the behaviour matches TODO.roadmap/07-cli-tools.md (Configuration section) on POSIX systems:

• config: ~/.config/confium/
• plugins: ~/.local/share/confium/plugins/

Each helper accepts an optional override root so tests can point the CLI at a temp directory without touching the real home. When the override is None the function falls back to the environment-derived path.

Functions

config_dir

The base config directory, honouring XDG_CONFIG_HOME then $HOME.

config_file

The main config file (<config>/config.toml).

plugin_install_dir

Where a single installed plugin artifact lives: <plugins>/<name>-<version>.so.

plugins_dir

The base data directory for installed plugins.

trust_dir

The trust-store directory (<config>/trust).