# Cylc 8.0b3 - final beta release!

**URL:** <https://cylc.discourse.group/t/cylc-8-0b3-final-beta-release/407>\
**Category:** Cylc Announce\
**Created:** [December 2, 2021, 5:13am UTC](https://cylc.discourse.group/t/cylc-8-0b3-final-beta-release/407 "2021-12-02T05:13:53Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![hilary.j.oliver](https://yyz2.discourse-cdn.com/free1/user_avatar/cylc.discourse.group/hilary.j.oliver/32/4_2.png) [@hilary.j.oliver](https://cylc.discourse.group/u/hilary.j.oliver)\
**Post date:** [December 2, 2021, 5:13am UTC](https://cylc.discourse.group/t/cylc-8-0b3-final-beta-release/407/1 "2021-12-02T05:13:53Z")

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The 4th and final beta release of Cylc 8 is now available 🎉 Thanks to the dev team!

> Cylc 8.0b3 is the final _beta_ pre-release of Cylc 8. **It is largely complete and can be used to manage real workflows** , but it has not yet been heavily tested by users. Python 2 based Cylc 7 is stable and still available if needed for production systems.
> 
> Please report migration issues to the [Cylc Discourse Forum (7-to-8 topic)](https://cylc.discourse.group/c/cylc/7-to-8/13).

**We’d like to encourage all users to get started working with Cylc 8 now, with this release.**

There are some major enhancements, to complete the core feature set of Cylc 8, including:

- A hub-less mode for single-user installations
  - `cylc gui` starts a UI Server with token-based authentication

- New syntax to distinguish _optional_ and _expected_ task outputs
  - This supports optional graph branching (without suicide triggers) and allows the scheduler to correctly diagnose workflow completion

- Configurable multi-user authorization - you can authorize others to read or control your workflows
  - (However manual URL manipulation is currently required to see the other user’s UI Server)

- Hierarchical “gscan” sidebar in the UI, for hierarchically organized groups of workflows
- All commands automatically infer latest workflow run number (`workflow-name/run1` etc.)
- Online documentation fully upgraded for Cylc 8
  - (There are bound to be some remaining errors and omissions; just ask on this forum!)
  - (Tutorials converted for Cylc 8, but have some known problems; a rewrite is in the works)

This is all, of course, on top of previously announced features. For a complete description of how Cylc 8 differs from Cylc 7 see:

- [https://cylc.github.io/cylc-doc/8.0b3/html/7-to-8/index.html](https://cylc.github.io/cylc-doc/8.0b3/html/7-to-8/index.html)

Installation instructions are in the online docs too:

- [https://cylc.github.io/cylc-doc/8.0b3/html/installation.html](https://cylc.github.io/cylc-doc/8.0b3/html/installation.html)

For remaining caveats (for instance, you can’t yet get job log files from the new GUI, but you can from the command line; and we don’t yet have graph visualization in the GUI) see:

- [https://cylc.github.io/cylc-doc/8.0b3/html/7-to-8/caveats.html](https://cylc.github.io/cylc-doc/8.0b3/html/7-to-8/caveats.html)

Feel free to report any problems you run into, on this forum.