Cumulus version 4.0.4 is released

[Yiming Yang]

Hello All,

Cumulus version 4.0.4 is released.

The release notes can be viewed at https://github.com/lilab-bcb/cumulus/releases/tag/4.0.4.

The workflows are published on Dockstore at https://dockstore.org/organizations/lilab/collections/Cumulus.

The user guide documentation is at https://cumulus.readthedocs.io/en/4.0.4/.

## 4.0.4 (2026-04-14)

### Cellranger workflow:

* Support Flex v2 data processing. Users need to specify "flex-v2" in DataType column of the input sample sheet. "flex-v1" and "frp" are for Flex v1.

### SmartSeq2 workflow:

* Default resources are stored in gs://cumulus-ref bucket in GCP region us-central1.

Sincerely,

Yiming