Fetter

Environment markers in `Pipfile.lock` files are now imported.

Support for lock files created by Pixi.

Added the `exit` subcommand to the `audit` command.

Implemented `SystemTag`

Implemented the `monitor-scan` command.

Added the `--ignore` parameter to `site-install`.

Added the `--stderr` flag to optionally divert all output to stderr.

Updated `site-install` to always use `--stderr`.

Added the `--ignore` parameter to `validate` to permit bypassing validation of specified packages. Defaults to ignore `pip`.

Better file path validation and error reporting.

Limit `site-install` and `site-uninstall` to only operate on single-Python environment selections.

Support for nearly all dependency environment markers.

Extended support for lock files provided to `--bound` to include `uv.lock`, `poetry.lock`, `Pipfile.lock`, as well as lock files produced by `uv pip compile` and `pip-tools`.

Improved loading of `--bound` files sourced from a `git` repository to find and load various lock file formats as well as `pyproject.toml`.

Improved loading of `--bound` files sourced from a URL to support various lock file formats as well as `pyproject.toml`.

Improved `site-install` to run in the same parent Python process.

Added `code` option to `display` to only optionally return an error code.