# What changed in towncrier

> 4 changes in towncrier 26 from its official release notes, upgrade guides and advisories: 1 breaking, 3 new APIs and options. Each one cited. Sources checked 2026-10-27. HTML: https://unstale.sh/pypi/towncrier/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## towncrier 26

### Breaking changes

- Fragment names whose issue identifier contains a period are now rejected. (26.9.0) — [release notes](https://github.com/twisted/towncrier/releases/tag/26.9.0)

### New APIs and options

- towncrier build can set the date using SOURCE_DATE_EPOCH, supporting Reproducible Builds. (26.9.0) — [release notes](https://github.com/twisted/towncrier/releases/tag/26.9.0)
- Use --sub-issue when creating multiple fragments for the same issue number. (26.9.0) — [release notes](https://github.com/twisted/towncrier/releases/tag/26.9.0)
- Set wrap to an integer greater than 0 to configure wrapped line length; when set to true, the default remains 79. (26.9.0) — [release notes](https://github.com/twisted/towncrier/releases/tag/26.9.0)