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orphan: false
---

# What's new in v0.4.1

```{versionadded} v0.4.1
```

v0.4.1 (2026-10-13) fixes the packaging and its documentation. No library code
changed; everything in the
[v0.4.0 notes](v0.4.0.md) still holds.

## Fixed

- **`pip install maddening[all]` and `maddening[dev]` install from wheels again.**
  In 0.4.0 and earlier, `all` included PyGObject, the Python bindings the
  `streaming` extra uses. PyPI publishes PyGObject as source only, so pip had to
  compile it, and the build stopped with `Dependency "cairo" not found` on a
  machine without the cairo and GObject-introspection development headers. `dev`
  includes `all`, so the development install failed the same way.
  - `all` is now every feature extra except `usd` and `streaming`, plus the
    RunPod and Lambda cloud providers.
  - `streaming` still installs PyGObject. It also needs GStreamer and its WebRTC
    plugins, which come from your system's package manager, not from pip: see
    [Streaming prerequisites](../user_guide/installation.md#streaming-prerequisites).
  - CI now resolves `all` and `dev` from wheels alone on every push, so a
    dependency that needs a build cannot slip back into them.
- **On 0.4.0 or earlier,** name the extras of `all` except `streaming` instead:

  ```bash
  pip install "maddening[viz,terminal,network,api,surrogates,viz3d,gpu-viz,compression,cloud]"
  ```

- **A `pip install -e ".[dev]"` checkout can run the tests again.** Since 0.4.0
  `tests/conftest.py` imports hypothesis, which `dev` did not install; nor did it
  carry the starlette floor the API tests need or the build backend the packaging
  test uses. `dev` now includes the `verify` extra and both.
- **The installation guide lists every extra.** `verify` (hypothesis, which
  `maddening.testing` needs to verify your own nodes) was documented only in the
  developer guide; `dev`, `ci` and `sbom` now have a section of their own.

## Known anomalies

- `MADD-ANO-296` records this defect, resolved in 0.4.1. The registry's other
  entries are unchanged from 0.4.0.